system.cpp source code [opencv/modules/core/src/system.cpp]

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42	//M/*
43
44	#include "precomp.hpp"
45	#include <atomic>
46	#include <exception>
47	#include <iostream>
48	#include <ostream>
49
50	#ifdef __QNX__
51	#include <unistd.h>
52	#include <sys/neutrino.h>
53	#include <sys/syspage.h>
54	#ifdef __aarch64__
55	#include <aarch64/syspage.h>
56	#endif
57	#endif
58
59	#include <opencv2/core/utils/configuration.private.hpp>
60	#include <opencv2/core/utils/trace.private.hpp>
61
62	#include <opencv2/core/utils/logger.hpp>
63
64	#include <opencv2/core/utils/tls.hpp>
65	#include <opencv2/core/utils/instrumentation.hpp>
66
67	#include <opencv2/core/utils/filesystem.private.hpp>
68
69	#include <opencv2/core/utils/fp_control_utils.hpp>
70	#include <opencv2/core/utils/fp_control.private.hpp>
71
72	namespace cv {
73
74	static void _initSystem()
75	{
76	#ifdef __ANDROID__
77	// https://github.com/opencv/opencv/issues/14906
78	// "ios_base::Init" object is not a part of Android's "iostream" header (in case of clang toolchain, NDK 20).
79	// Ref1: https://en.cppreference.com/w/cpp/io/ios_base/Init
80	// The header <iostream> behaves as if it defines (directly or indirectly) an instance of std::ios_base::Init with static storage duration
81	// Ref2: https://github.com/gcc-mirror/gcc/blob/gcc-8-branch/libstdc%2B%2B-v3/include/std/iostream#L73-L74
82	static std::ios_base::Init s_iostream_initializer;
83	#endif
84	}
85
86	static Mutex* __initialization_mutex = NULL;
87	Mutex& getInitializationMutex()
88	{
89	if (__initialization_mutex == NULL)
90	{
91	(void)_initSystem();
92	__initialization_mutex = new Mutex ();
93	}
94	return *__initialization_mutex;
95	}
96	// force initialization (single-threaded environment)
97	Mutex* __initialization_mutex_initializer = &getInitializationMutex();
98
99	static bool param_dumpErrors = utils::getConfigurationParameterBool(name: "OPENCV_DUMP_ERRORS",
100	#if defined(_DEBUG) \|\| defined(__ANDROID__)
101	true
102	#else
103	defaultValue: false
104	#endif
105	);
106
107	void* allocSingletonBuffer(size_t size) { return fastMalloc(bufSize: size); }
108	void* allocSingletonNewBuffer(size_t size) { return malloc(size: size); }
109
110
111	} // namespace cv
112
113	#ifndef CV_ERROR_SET_TERMINATE_HANDLER // build config option
114	# if defined(_WIN32)
115	# define CV_ERROR_SET_TERMINATE_HANDLER 1
116	# endif
117	#endif
118	#if defined(CV_ERROR_SET_TERMINATE_HANDLER) && !CV_ERROR_SET_TERMINATE_HANDLER
119	# undef CV_ERROR_SET_TERMINATE_HANDLER
120	#endif
121
122	#ifdef _MSC_VER
123	# if _MSC_VER >= 1700
124	# pragma warning(disable:4447) // Disable warning 'main' signature found without threading model
125	# endif
126	#endif
127
128	#ifdef CV_ERROR_SET_TERMINATE_HANDLER
129	#include <cstdlib> // std::abort
130	#endif
131
132	#if defined __ANDROID__ \|\| defined __unix__ \|\| defined __FreeBSD__ \|\| defined __OpenBSD__ \|\| defined __HAIKU__ \|\| defined __Fuchsia__ \|\| defined __QNX__
133	# include <unistd.h>
134	# include <fcntl.h>
135	#if defined __QNX__
136	# include <sys/elf.h>
137	# include <sys/auxv.h>
138	using Elf64_auxv_t = auxv64_t;
139	# include <elfdefinitions.h>
140	const uint64_t AT_HWCAP = NT_GNU_HWCAP;
141	#else
142	# include <elf.h>
143	#endif
144	#if defined __ANDROID__ \|\| defined __linux__
145	# include <linux/auxvec.h>
146	#endif
147	#endif
148
149	#if defined __ANDROID__ && defined HAVE_CPUFEATURES
150	# include <cpu-features.h>
151	#endif
152
153
154	#if ((defined __ppc64__ \|\| defined __PPC64__) && (defined HAVE_GETAUXVAL \|\| defined HAVE_ELF_AUX_INFO))
155	# include "sys/auxv.h"
156	# ifndef AT_HWCAP2
157	# define AT_HWCAP2 26
158	# endif
159	# ifndef PPC_FEATURE2_ARCH_2_07
160	# define PPC_FEATURE2_ARCH_2_07 0x80000000
161	# endif
162	# ifndef PPC_FEATURE2_ARCH_3_00
163	# define PPC_FEATURE2_ARCH_3_00 0x00800000
164	# endif
165	# ifndef PPC_FEATURE_HAS_VSX
166	# define PPC_FEATURE_HAS_VSX 0x00000080
167	# endif
168	#endif
169
170	#if defined __loongarch64
171	#include "sys/auxv.h"
172	#define LA_HWCAP_LSX (1<<4)
173	#define LA_HWCAP_LASX (1<<5)
174	#endif
175
176	#if defined _WIN32 \|\| defined WINCE
177	#ifndef _WIN32_WINNT // This is needed for the declaration of TryEnterCriticalSection in winbase.h with Visual Studio 2005 (and older?)
178	#define _WIN32_WINNT 0x0400 // http://msdn.microsoft.com/en-us/library/ms686857(VS.85).aspx
179	#endif
180	#include <windows.h>
181	#if (_WIN32_WINNT >= 0x0602)
182	#include <synchapi.h>
183	#endif
184	#if ((_WIN32_WINNT >= 0x0600) && !defined(CV_DISABLE_FLS)) \|\| defined(CV_FORCE_FLS)
185	#include <fibersapi.h>
186	#define CV_USE_FLS
187	#endif
188	#undef small
189	#undef min
190	#undef max
191	#undef abs
192	#include <tchar.h>
193
194	#ifdef WINRT
195	#include <wrl/client.h>
196	#ifndef __cplusplus_winrt
197	#include <windows.storage.h>
198	#pragma comment(lib, "runtimeobject.lib")
199	#endif // WINRT
200
201	std::wstring GetTempPathWinRT()
202	{
203	#ifdef __cplusplus_winrt
204	return std::wstring(Windows::Storage::ApplicationData::Current->TemporaryFolder->Path->Data());
205	#else
206	Microsoft::WRL::ComPtr<ABI::Windows::Storage::IApplicationDataStatics> appdataFactory;
207	Microsoft::WRL::ComPtr<ABI::Windows::Storage::IApplicationData> appdataRef;
208	Microsoft::WRL::ComPtr<ABI::Windows::Storage::IStorageFolder> storagefolderRef;
209	Microsoft::WRL::ComPtr<ABI::Windows::Storage::IStorageItem> storageitemRef;
210	HSTRING str;
211	HSTRING_HEADER hstrHead;
212	std::wstring wstr;
213	if (FAILED(WindowsCreateStringReference(RuntimeClass_Windows_Storage_ApplicationData,
214	(UINT32)wcslen(RuntimeClass_Windows_Storage_ApplicationData), &hstrHead, &str)))
215	return wstr;
216	if (FAILED(RoGetActivationFactory(str, IID_PPV_ARGS(appdataFactory.ReleaseAndGetAddressOf()))))
217	return wstr;
218	if (FAILED(appdataFactory->get_Current(appdataRef.ReleaseAndGetAddressOf())))
219	return wstr;
220	if (FAILED(appdataRef->get_TemporaryFolder(storagefolderRef.ReleaseAndGetAddressOf())))
221	return wstr;
222	if (FAILED(storagefolderRef.As(&storageitemRef)))
223	return wstr;
224	str = NULL;
225	if (FAILED(storageitemRef->get_Path(&str)))
226	return wstr;
227	wstr = WindowsGetStringRawBuffer(str, NULL);
228	WindowsDeleteString(str);
229	return wstr;
230	#endif
231	}
232
233	std::wstring GetTempFileNameWinRT(std::wstring prefix)
234	{
235	wchar_t guidStr[`40`];
236	GUID g;
237	CoCreateGuid(&g);
238	wchar_t* mask = L"%08x_%04x_%04x_%02x%02x_%02x%02x%02x%02x%02x%02x";
239	swprintf(&guidStr[`0`], sizeof(guidStr)/sizeof(wchar_t), mask,
240	g.Data1, g.Data2, g.Data3, UINT(g.Data4[`0`]), UINT(g.Data4[`1`]),
241	UINT(g.Data4[`2`]), UINT(g.Data4[`3`]), UINT(g.Data4[`4`]),
242	UINT(g.Data4[`5`]), UINT(g.Data4[`6`]), UINT(g.Data4[`7`]));
243
244	return prefix.append(std::wstring(guidStr));
245	}
246
247	#endif
248	#else
249	#ifndef OPENCV_DISABLE_THREAD_SUPPORT
250	#include <pthread.h>
251	#endif
252	#include <sys/time.h>
253	#include <time.h>
254
255	#if defined __MACH__ && defined __APPLE__
256	#include <mach/mach.h>
257	#include <mach/mach_time.h>
258	#include <sys/sysctl.h>
259	#endif
260
261	#endif
262
263	#ifdef _OPENMP
264	#include "omp.h"
265	#endif
266
267	#if defined __unix__ \|\| defined __APPLE__ \|\| defined __EMSCRIPTEN__ \|\| defined __FreeBSD__ \|\| defined __OpenBSD__ \|\| defined __GLIBC__ \|\| defined __HAIKU__
268	#include <unistd.h>
269	#include <stdio.h>
270	#include <sys/types.h>
271	#if defined __ANDROID__
272	#include <sys/sysconf.h>
273	#endif
274	#endif
275
276	#ifdef __ANDROID__
277	# include <android/log.h>
278	#endif
279
280	#ifdef DECLARE_CV_CPUID_X86
281	DECLARE_CV_CPUID_X86
282	#endif
283	#ifndef CV_CPUID_X86
284	#if defined _MSC_VER && (defined _M_IX86 \|\| defined _M_X64)
285	#if _MSC_VER >= 1400 // MSVS 2005
286	#include <intrin.h> // __cpuidex()
287	#define CV_CPUID_X86 __cpuidex
288	#else
289	#error "Required MSVS 2005+"
290	#endif
291	#elif defined __GNUC__ && (defined __i386__ \|\| defined __x86_64__)
292	static void cv_cpuid(int* cpuid_data, int reg_eax, int reg_ecx)
293	{
294	int __eax = reg_eax, __ebx = `0`, __ecx = reg_ecx, __edx = `0`;
295	// tested with available compilers (-fPIC -O2 -m32/-m64): https://godbolt.org/
296	#if !defined(__PIC__) \
297	\|\| defined(__x86_64__) \|\| __GNUC__ >= 5 \
298	\|\| defined(__clang__) \|\| defined(__INTEL_COMPILER)
299	__asm__("cpuid\n\t"
300	: "+a" (__eax), "=b" (__ebx), "+c" (__ecx), "=d" (__edx)
301	);
302	#elif defined(__i386__) // ebx may be reserved as the PIC register
303	__asm__("xchg{l}\t{%%}ebx, %1\n\t"
304	"cpuid\n\t"
305	"xchg{l}\t{%%}ebx, %1\n\t"
306	: "+a" (__eax), "=&r" (__ebx), "+c" (__ecx), "=d" (__edx)
307	);
308	#else
309	#error "Configuration error"
310	#endif
311	cpuid_data[`0`] = __eax; cpuid_data[`1`] = __ebx; cpuid_data[`2`] = __ecx; cpuid_data[`3`] = __edx;
312	}
313	#define CV_CPUID_X86 cv_cpuid
314	#endif
315	#endif
316
317	#include <chrono>
318
319	namespace cv
320	{
321
322	Exception::Exception() { code = `0`; line = `0`; }
323
324	Exception::Exception(int _code, const String& _err, const String& _func, const String& _file, int _line)
325	: code(_code), err (_err), func (_func), file (_file), line(_line)
326	{
327	formatMessage();
328	}
329
330	Exception::~Exception() CV_NOEXCEPT {}
331
332	/!*
333	\return the error description and the context as a text string.
334	*/
335	const char* Exception::what() const CV_NOEXCEPT { return msg.c_str(); }
336
337	void Exception::formatMessage()
338	{
339	size_t pos = err.find(c: `'\n'`);
340	bool multiline = pos != cv::String::npos;
341	if (multiline)
342	{
343	std::stringstream ss;
344	size_t prev_pos = `0`;
345	while (pos != cv::String::npos)
346	{
347	ss << "> " << err.substr(pos: prev_pos, n: pos - prev_pos) << std::endl;
348	prev_pos = pos + `1`;
349	pos = err.find(c: `'\n'`, pos: prev_pos);
350	}
351	ss << "> " << err.substr(pos: prev_pos);
352	if (err [err.size() - `1`] != `'\n'`)
353	ss << std::endl;
354	err = ss.str();
355	}
356	if (func.size() > `0`)
357	{
358	if (multiline)
359	msg = format(fmt: "OpenCV(%s) %s:%d: error: (%d:%s) in function '%s'\n%s", CV_VERSION, file.c_str(), line, code, cvErrorStr(status: code), func.c_str(), err.c_str());
360	else
361	msg = format(fmt: "OpenCV(%s) %s:%d: error: (%d:%s) %s in function '%s'\n", CV_VERSION, file.c_str(), line, code, cvErrorStr(status: code), err.c_str(), func.c_str());
362	}
363	else
364	{
365	msg = format(fmt: "OpenCV(%s) %s:%d: error: (%d:%s) %s%s", CV_VERSION, file.c_str(), line, code, cvErrorStr(status: code), err.c_str(), multiline ? "" : "\n");
366	}
367	}
368
369	static const char* g_hwFeatureNames[CV_HARDWARE_MAX_FEATURE] = { NULL };
370
371	static const char* getHWFeatureName(int id)
372	{
373	return (id < CV_HARDWARE_MAX_FEATURE) ? g_hwFeatureNames[id] : NULL;
374	}
375	static const char* getHWFeatureNameSafe(int id)
376	{
377	const char* name = getHWFeatureName(id);
378	return name ? name : "Unknown feature";
379	}
380
381	struct HWFeatures
382	{
383	enum { MAX_FEATURE = CV_HARDWARE_MAX_FEATURE };
384
385	HWFeatures(bool run_initialize = false)
386	{
387	if (run_initialize)
388	initialize();
389	}
390
391	static void initializeNames()
392	{
393	for (int i = `0`; i < CV_HARDWARE_MAX_FEATURE; i++)
394	{
395	g_hwFeatureNames[i] = `0`;
396	}
397	g_hwFeatureNames[CPU_MMX] = "MMX";
398	g_hwFeatureNames[CPU_SSE] = "SSE";
399	g_hwFeatureNames[CPU_SSE2] = "SSE2";
400	g_hwFeatureNames[CPU_SSE3] = "SSE3";
401	g_hwFeatureNames[CPU_SSSE3] = "SSSE3";
402	g_hwFeatureNames[CPU_SSE4_1] = "SSE4.1";
403	g_hwFeatureNames[CPU_SSE4_2] = "SSE4.2";
404	g_hwFeatureNames[CPU_POPCNT] = "POPCNT";
405	g_hwFeatureNames[CPU_FP16] = "FP16";
406	g_hwFeatureNames[CPU_AVX] = "AVX";
407	g_hwFeatureNames[CPU_AVX2] = "AVX2";
408	g_hwFeatureNames[CPU_FMA3] = "FMA3";
409
410	g_hwFeatureNames[CPU_AVX_512F] = "AVX512F";
411	g_hwFeatureNames[CPU_AVX_512BW] = "AVX512BW";
412	g_hwFeatureNames[CPU_AVX_512CD] = "AVX512CD";
413	g_hwFeatureNames[CPU_AVX_512DQ] = "AVX512DQ";
414	g_hwFeatureNames[CPU_AVX_512ER] = "AVX512ER";
415	g_hwFeatureNames[CPU_AVX_512IFMA] = "AVX512IFMA";
416	g_hwFeatureNames[CPU_AVX_512PF] = "AVX512PF";
417	g_hwFeatureNames[CPU_AVX_512VBMI] = "AVX512VBMI";
418	g_hwFeatureNames[CPU_AVX_512VL] = "AVX512VL";
419	g_hwFeatureNames[CPU_AVX_512VBMI2] = "AVX512VBMI2";
420	g_hwFeatureNames[CPU_AVX_512VNNI] = "AVX512VNNI";
421	g_hwFeatureNames[CPU_AVX_512BITALG] = "AVX512BITALG";
422	g_hwFeatureNames[CPU_AVX_512VPOPCNTDQ] = "AVX512VPOPCNTDQ";
423	g_hwFeatureNames[CPU_AVX_5124VNNIW] = "AVX5124VNNIW";
424	g_hwFeatureNames[CPU_AVX_5124FMAPS] = "AVX5124FMAPS";
425
426	g_hwFeatureNames[CPU_NEON] = "NEON";
427	g_hwFeatureNames[CPU_NEON_DOTPROD] = "NEON_DOTPROD";
428	g_hwFeatureNames[CPU_NEON_FP16] = "NEON_FP16";
429	g_hwFeatureNames[CPU_NEON_BF16] = "NEON_BF16";
430
431	g_hwFeatureNames[CPU_VSX] = "VSX";
432	g_hwFeatureNames[CPU_VSX3] = "VSX3";
433
434	g_hwFeatureNames[CPU_MSA] = "CPU_MSA";
435	g_hwFeatureNames[CPU_RISCVV] = "RISCVV";
436
437	g_hwFeatureNames[CPU_AVX512_COMMON] = "AVX512-COMMON";
438	g_hwFeatureNames[CPU_AVX512_SKX] = "AVX512-SKX";
439	g_hwFeatureNames[CPU_AVX512_KNL] = "AVX512-KNL";
440	g_hwFeatureNames[CPU_AVX512_KNM] = "AVX512-KNM";
441	g_hwFeatureNames[CPU_AVX512_CNL] = "AVX512-CNL";
442	g_hwFeatureNames[CPU_AVX512_CLX] = "AVX512-CLX";
443	g_hwFeatureNames[CPU_AVX512_ICL] = "AVX512-ICL";
444
445	g_hwFeatureNames[CPU_RVV] = "RVV";
446
447	g_hwFeatureNames[CPU_LSX] = "LSX";
448	g_hwFeatureNames[CPU_LASX] = "LASX";
449	}
450
451	void initialize(void)
452	{
453	if (utils::getConfigurationParameterBool(name: "OPENCV_DUMP_CONFIG"))
454	{
455	fprintf(stderr, format: "\nOpenCV build configuration is:\n%s\n",
456	cv::getBuildInformation().c_str());
457	}
458
459	initializeNames();
460
461	#ifdef CV_CPUID_X86
462	int cpuid_data[`4`] = { `0`, `0`, `0`, `0` };
463	int cpuid_data_ex[`4`] = { `0`, `0`, `0`, `0` };
464
465	CV_CPUID_X86(cpuid_data, reg_eax: `1`, reg_ecx: `0`/unused/);
466
467	int x86_family = (cpuid_data[`0`] >> `8`) & `15`;
468	if( x86_family >= `6` )
469	{
470	have[CV_CPU_MMX] = (cpuid_data[`3`] & (`1`<<`23`)) != `0`;
471	have[CV_CPU_SSE] = (cpuid_data[`3`] & (`1`<<`25`)) != `0`;
472	have[CV_CPU_SSE2] = (cpuid_data[`3`] & (`1`<<`26`)) != `0`;
473	have[CV_CPU_SSE3] = (cpuid_data[`2`] & (`1`<<`0`)) != `0`;
474	have[CV_CPU_SSSE3] = (cpuid_data[`2`] & (`1`<<`9`)) != `0`;
475	have[CV_CPU_FMA3] = (cpuid_data[`2`] & (`1`<<`12`)) != `0`;
476	have[CV_CPU_SSE4_1] = (cpuid_data[`2`] & (`1`<<`19`)) != `0`;
477	have[CV_CPU_SSE4_2] = (cpuid_data[`2`] & (`1`<<`20`)) != `0`;
478	have[CV_CPU_POPCNT] = (cpuid_data[`2`] & (`1`<<`23`)) != `0`;
479	have[CV_CPU_AVX] = (cpuid_data[`2`] & (`1`<<`28`)) != `0`;
480	have[CV_CPU_FP16] = (cpuid_data[`2`] & (`1`<<`29`)) != `0`;
481
482	// make the second call to the cpuid command in order to get
483	// information about extended features like AVX2
484	CV_CPUID_X86(cpuid_data: cpuid_data_ex, reg_eax: `7`, reg_ecx: `0`);
485
486	have[CV_CPU_AVX2] = (cpuid_data_ex[`1`] & (`1`<<`5`)) != `0`;
487
488	have[CV_CPU_AVX_512F] = (cpuid_data_ex[`1`] & (`1`<<`16`)) != `0`;
489	have[CV_CPU_AVX_512DQ] = (cpuid_data_ex[`1`] & (`1`<<`17`)) != `0`;
490	have[CV_CPU_AVX_512IFMA] = (cpuid_data_ex[`1`] & (`1`<<`21`)) != `0`;
491	have[CV_CPU_AVX_512PF] = (cpuid_data_ex[`1`] & (`1`<<`26`)) != `0`;
492	have[CV_CPU_AVX_512ER] = (cpuid_data_ex[`1`] & (`1`<<`27`)) != `0`;
493	have[CV_CPU_AVX_512CD] = (cpuid_data_ex[`1`] & (`1`<<`28`)) != `0`;
494	have[CV_CPU_AVX_512BW] = (cpuid_data_ex[`1`] & (`1`<<`30`)) != `0`;
495	have[CV_CPU_AVX_512VL] = (cpuid_data_ex[`1`] & (`1`<<`31`)) != `0`;
496	have[CV_CPU_AVX_512VBMI] = (cpuid_data_ex[`2`] & (`1`<<`1`)) != `0`;
497	have[CV_CPU_AVX_512VBMI2] = (cpuid_data_ex[`2`] & (`1`<<`6`)) != `0`;
498	have[CV_CPU_AVX_512VNNI] = (cpuid_data_ex[`2`] & (`1`<<`11`)) != `0`;
499	have[CV_CPU_AVX_512BITALG] = (cpuid_data_ex[`2`] & (`1`<<`12`)) != `0`;
500	have[CV_CPU_AVX_512VPOPCNTDQ] = (cpuid_data_ex[`2`] & (`1`<<`14`)) != `0`;
501	have[CV_CPU_AVX_5124VNNIW] = (cpuid_data_ex[`3`] & (`1`<<`2`)) != `0`;
502	have[CV_CPU_AVX_5124FMAPS] = (cpuid_data_ex[`3`] & (`1`<<`3`)) != `0`;
503
504	bool have_AVX_OS_support = true;
505	bool have_AVX512_OS_support = true;
506	if (!(cpuid_data[`2`] & (`1`<<`27`)))
507	have_AVX_OS_support = false; // OS uses XSAVE_XRSTORE and CPU support AVX
508	else
509	{
510	int xcr0 = `0`;
511	#ifdef _XCR_XFEATURE_ENABLED_MASK // requires immintrin.h
512	xcr0 = (int)_xgetbv(_XCR_XFEATURE_ENABLED_MASK);
513	#elif defined __GNUC__ && (defined __i386__ \|\| defined __x86_64__)
514	__asm__ ("xgetbv\n\t" : "=a" (xcr0) : "c" (`0`) : "%edx" );
515	#endif
516	if ((xcr0 & `0x6`) != `0x6`)
517	have_AVX_OS_support = false; // YMM registers
518	if ((xcr0 & `0xe6`) != `0xe6`)
519	have_AVX512_OS_support = false; // ZMM registers
520	}
521
522	if (!have_AVX_OS_support)
523	{
524	have[CV_CPU_AVX] = false;
525	have[CV_CPU_FP16] = false;
526	have[CV_CPU_AVX2] = false;
527	have[CV_CPU_FMA3] = false;
528	}
529	if (!have_AVX_OS_support \|\| !have_AVX512_OS_support)
530	{
531	have[CV_CPU_AVX_512F] = false;
532	have[CV_CPU_AVX_512BW] = false;
533	have[CV_CPU_AVX_512CD] = false;
534	have[CV_CPU_AVX_512DQ] = false;
535	have[CV_CPU_AVX_512ER] = false;
536	have[CV_CPU_AVX_512IFMA] = false;
537	have[CV_CPU_AVX_512PF] = false;
538	have[CV_CPU_AVX_512VBMI] = false;
539	have[CV_CPU_AVX_512VL] = false;
540	have[CV_CPU_AVX_512VBMI2] = false;
541	have[CV_CPU_AVX_512VNNI] = false;
542	have[CV_CPU_AVX_512BITALG] = false;
543	have[CV_CPU_AVX_512VPOPCNTDQ] = false;
544	have[CV_CPU_AVX_5124VNNIW] = false;
545	have[CV_CPU_AVX_5124FMAPS] = false;
546	}
547
548	have[CV_CPU_AVX512_COMMON] = have[CV_CPU_AVX_512F] && have[CV_CPU_AVX_512CD];
549	if (have[CV_CPU_AVX512_COMMON])
550	{
551	have[CV_CPU_AVX512_KNL] = have[CV_CPU_AVX_512ER] && have[CV_CPU_AVX_512PF];
552	have[CV_CPU_AVX512_KNM] = have[CV_CPU_AVX512_KNL] && have[CV_CPU_AVX_5124FMAPS] &&
553	have[CV_CPU_AVX_5124VNNIW] && have[CV_CPU_AVX_512VPOPCNTDQ];
554	have[CV_CPU_AVX512_SKX] = have[CV_CPU_AVX_512BW] && have[CV_CPU_AVX_512DQ] && have[CV_CPU_AVX_512VL];
555	have[CV_CPU_AVX512_CNL] = have[CV_CPU_AVX512_SKX] && have[CV_CPU_AVX_512IFMA] && have[CV_CPU_AVX_512VBMI];
556	have[CV_CPU_AVX512_CLX] = have[CV_CPU_AVX512_SKX] && have[CV_CPU_AVX_512VNNI];
557	have[CV_CPU_AVX512_ICL] = have[CV_CPU_AVX512_SKX] &&
558	have[CV_CPU_AVX_512IFMA] && have[CV_CPU_AVX_512VBMI] &&
559	have[CV_CPU_AVX_512VNNI] &&
560	have[CV_CPU_AVX_512VBMI2] && have[CV_CPU_AVX_512BITALG] && have[CV_CPU_AVX_512VPOPCNTDQ];
561	}
562	else
563	{
564	have[CV_CPU_AVX512_KNL] = false;
565	have[CV_CPU_AVX512_KNM] = false;
566	have[CV_CPU_AVX512_SKX] = false;
567	have[CV_CPU_AVX512_CNL] = false;
568	have[CV_CPU_AVX512_CLX] = false;
569	have[CV_CPU_AVX512_ICL] = false;
570	}
571	}
572	#endif // CV_CPUID_X86
573
574	#if defined __ANDROID__ \|\| defined __linux__ \|\| defined __QNX__
575	#ifdef __aarch64__
576	have[CV_CPU_NEON] = true;
577	have[CV_CPU_FP16] = true;
578	int cpufile = open("/proc/self/auxv", O_RDONLY);
579
580	if (cpufile >= `0`)
581	{
582	Elf64_auxv_t auxv;
583	const size_t size_auxv_t = sizeof(auxv);
584
585	while ((size_t)read(cpufile, &auxv, size_auxv_t) == size_auxv_t)
586	{
587	// see https://elixir.bootlin.com/linux/latest/source/arch/arm64/include/uapi/asm/hwcap.h
588	if (auxv.a_type == AT_HWCAP)
589	{
590	have[CV_CPU_NEON_DOTPROD] = (auxv.a_un.a_val & (`1` << `20`)) != `0`; // HWCAP_ASIMDDP
591	have[CV_CPU_NEON_FP16] = (auxv.a_un.a_val & (`1` << `10`)) != `0`; // HWCAP_ASIMDHP
592	}
593	#if defined(AT_HWCAP2)
594	else if (auxv.a_type == AT_HWCAP2)
595	{
596	have[CV_CPU_NEON_BF16] = (auxv.a_un.a_val & (`1` << `14`)) != `0`; // HWCAP2_BF16
597	}
598	#endif
599	}
600
601	close(cpufile);
602	}
603	#elif defined __arm__ && defined __ANDROID__
604	#if defined HAVE_CPUFEATURES
605	CV_LOG_INFO(NULL, "calling android_getCpuFeatures() ...");
606	uint64_t features = android_getCpuFeatures();
607	CV_LOG_INFO(NULL, cv::format("calling android_getCpuFeatures() ... Done (%llx)", (long long)features));
608	have[CV_CPU_NEON] = (features & ANDROID_CPU_ARM_FEATURE_NEON) != `0`;
609	have[CV_CPU_FP16] = (features & ANDROID_CPU_ARM_FEATURE_VFP_FP16) != `0`;
610	#else
611	CV_LOG_INFO(NULL, "cpufeatures library is not available for CPU detection");
612	#if CV_NEON
613	CV_LOG_INFO(NULL, "- NEON instructions is enabled via build flags");
614	have[CV_CPU_NEON] = true;
615	#else
616	CV_LOG_INFO(NULL, "- NEON instructions is NOT enabled via build flags");
617	#endif
618	#if CV_FP16
619	CV_LOG_INFO(NULL, "- FP16 instructions is enabled via build flags");
620	have[CV_CPU_FP16] = true;
621	#else
622	CV_LOG_INFO(NULL, "- FP16 instructions is NOT enabled via build flags");
623	#endif
624	#endif
625	#elif defined __arm__
626	int cpufile = open("/proc/self/auxv", O_RDONLY);
627
628	if (cpufile >= `0`)
629	{
630	Elf32_auxv_t auxv;
631	const size_t size_auxv_t = sizeof(auxv);
632
633	while ((size_t)read(cpufile, &auxv, size_auxv_t) == size_auxv_t)
634	{
635	if (auxv.a_type == AT_HWCAP)
636	{
637	have[CV_CPU_NEON] = (auxv.a_un.a_val & `4096`) != `0`;
638	have[CV_CPU_FP16] = (auxv.a_un.a_val & `2`) != `0`;
639	break;
640	}
641	}
642
643	close(cpufile);
644	}
645	#endif
646	#elif (defined __APPLE__)
647	#if defined __ARM_NEON
648	have[CV_CPU_NEON] = true;
649	#endif
650	#if (defined __ARM_FP && (((__ARM_FP & 0x2) != 0) && defined __ARM_NEON))
651	have[CV_CPU_FP16] = have[CV_CPU_NEON_FP16] = true;
652	#endif
653	// system.cpp may be compiled w/o special -march=armv8...+dotprod, -march=armv8...+bf16 etc.,
654	// so we check for the features in any case, no mater what are the compile flags.
655	// We check the real hardware capabilities here.
656	int has_feat_dotprod = `0`;
657	size_t has_feat_dotprod_size = sizeof(has_feat_dotprod);
658	sysctlbyname("hw.optional.arm.FEAT_DotProd", &has_feat_dotprod, &has_feat_dotprod_size, NULL, `0`);
659	if (has_feat_dotprod) {
660	have[CV_CPU_NEON_DOTPROD] = true;
661	}
662	int has_feat_bf16 = `0`;
663	size_t has_feat_bf16_size = sizeof(has_feat_bf16);
664	sysctlbyname("hw.optional.arm.FEAT_BF16", &has_feat_bf16, &has_feat_bf16_size, NULL, `0`);
665	if (has_feat_bf16) {
666	have[CV_CPU_NEON_BF16] = true;
667	}
668	#elif (defined __clang__)
669	#if defined __ARM_NEON
670	have[CV_CPU_NEON] = true;
671	#if (defined __ARM_FP && ((__ARM_FP & 0x2) != 0))
672	have[CV_CPU_FP16] = true;
673	#endif
674	#endif
675	#endif
676	#if defined _ARM_ && (defined(_WIN32_WCE) && _WIN32_WCE >= 0x800)
677	have[CV_CPU_NEON] = true;
678	#endif
679	#if defined _M_ARM64 \|\| defined _M_ARM64EC
680	have[CV_CPU_NEON] = true;
681	#endif
682	#ifdef __riscv_vector
683	have[CV_CPU_RISCVV] = true;
684	#endif
685	#ifdef __mips_msa
686	have[CV_CPU_MSA] = true;
687	#endif
688
689	#if (defined __ppc64__ \|\| defined __PPC64__) && defined HAVE_GETAUXVAL
690	unsigned int hwcap = getauxval(AT_HWCAP);
691	if (hwcap & PPC_FEATURE_HAS_VSX) {
692	hwcap = getauxval(AT_HWCAP2);
693	if (hwcap & PPC_FEATURE2_ARCH_3_00) {
694	have[CV_CPU_VSX] = have[CV_CPU_VSX3] = true;
695	} else {
696	have[CV_CPU_VSX] = (hwcap & PPC_FEATURE2_ARCH_2_07) != `0`;
697	}
698	}
699	#elif (defined __ppc64__ \|\| defined __PPC64__) && defined HAVE_ELF_AUX_INFO
700	unsigned long hwcap = `0`;
701	elf_aux_info(AT_HWCAP, &hwcap, sizeof(hwcap));
702	if (hwcap & PPC_FEATURE_HAS_VSX) {
703	elf_aux_info(AT_HWCAP2, &hwcap, sizeof(hwcap));
704	if (hwcap & PPC_FEATURE2_ARCH_3_00) {
705	have[CV_CPU_VSX] = have[CV_CPU_VSX3] = true;
706	} else {
707	have[CV_CPU_VSX] = (hwcap & PPC_FEATURE2_ARCH_2_07) != `0`;
708	}
709	}
710	#else
711	// TODO: AIX
712	#if CV_VSX \|\| defined _ARCH_PWR8 \|\| defined __POWER9_VECTOR__
713	have[CV_CPU_VSX] = true;
714	#endif
715	#if CV_VSX3 \|\| defined __POWER9_VECTOR__
716	have[CV_CPU_VSX3] = true;
717	#endif
718	#endif
719
720	#if defined __riscv && defined __riscv_vector
721	have[CV_CPU_RVV] = true;
722	#endif
723
724	#if defined __loongarch64 && defined __linux__
725	int flag = (int)getauxval(AT_HWCAP);
726
727	have[CV_CPU_LSX] = (flag & LA_HWCAP_LSX) != `0`;
728	have[CV_CPU_LASX] = (flag & LA_HWCAP_LASX) != `0`;
729	#endif
730
731	bool skip_baseline_check = false;
732	if (utils::getConfigurationParameterBool(name: "OPENCV_SKIP_CPU_BASELINE_CHECK"))
733	{
734	skip_baseline_check = true;
735	}
736	int baseline_features[] = { CV_CPU_BASELINE_FEATURES };
737	if (!checkFeatures(features: baseline_features, count: sizeof(baseline_features) / sizeof(baseline_features[`0`]))
738	&& !skip_baseline_check)
739	{
740	fprintf(stderr, format: "\n"
741	"******************************************************************\n"
742	"* FATAL ERROR: *\n"
743	"* This OpenCV build doesn't support current CPU/HW configuration *\n"
744	"* *\n"
745	"* Use OPENCV_DUMP_CONFIG=1 environment variable for details *\n"
746	"******************************************************************\n");
747	fprintf(stderr, format: "\nRequired baseline features:\n");
748	checkFeatures(features: baseline_features, count: sizeof(baseline_features) / sizeof(baseline_features[`0`]), dump: true);
749	CV_Error(cv::Error::StsAssert, "Missing support for required CPU baseline features. Check OpenCV build configuration and required CPU/HW setup.");
750	}
751
752	readSettings(baseline_features, baseline_count: sizeof(baseline_features) / sizeof(baseline_features[`0`]));
753	}
754
755	bool checkFeatures(const int* features, int count, bool dump = false)
756	{
757	bool result = true;
758	for (int i = `0`; i < count; i++)
759	{
760	int feature = features[i];
761	if (feature)
762	{
763	if (have[feature])
764	{
765	if (dump) fprintf(stderr, format: " ID=%3d (%s) - OK\n", feature, getHWFeatureNameSafe(id: feature));
766	}
767	else
768	{
769	result = false;
770	if (dump) fprintf(stderr, format: " ID=%3d (%s) - NOT AVAILABLE\n", feature, getHWFeatureNameSafe(id: feature));
771	}
772	}
773	}
774	return result;
775	}
776
777	static inline bool isSymbolSeparator(char c)
778	{
779	return c == `','` \|\| c == `';'`;
780	}
781
782	void readSettings(const int* baseline_features, int baseline_count)
783	{
784	bool dump = true;
785	std::string disabled_features = utils::getConfigurationParameterString(name: "OPENCV_CPU_DISABLE");
786	if (!disabled_features.empty())
787	{
788	const char* start = disabled_features.c_str();
789	for (;;)
790	{
791	while (start[`0`] != `0` && isSymbolSeparator(c: start[`0`]))
792	{
793	start++;
794	}
795	if (start[`0`] == `0`)
796	break;
797	const char* end = start;
798	while (end[`0`] != `0` && !isSymbolSeparator(c: end[`0`]))
799	{
800	end++;
801	}
802	if (end == start)
803	continue;
804	cv::String feature(start, end);
805	start = end;
806
807	CV_Assert(feature.size() > `0`);
808
809	bool found = false;
810	for (int i = `0`; i < CV_HARDWARE_MAX_FEATURE; i++)
811	{
812	if (!g_hwFeatureNames[i]) continue;
813	size_t len = strlen(s: g_hwFeatureNames[i]);
814	if (len != feature.size()) continue;
815	if (feature.compare(s: g_hwFeatureNames[i]) == `0`)
816	{
817	bool isBaseline = false;
818	for (int k = `0`; k < baseline_count; k++)
819	{
820	if (baseline_features[k] == i)
821	{
822	isBaseline = true;
823	break;
824	}
825	}
826	if (isBaseline)
827	{
828	if (dump) fprintf(stderr, format: "OPENCV: Trying to disable baseline CPU feature: '%s'."
829	"This has very limited effect, because code optimizations for this feature are executed unconditionally "
830	"in the most cases.\n", getHWFeatureNameSafe(id: i));
831	}
832	if (!have[i])
833	{
834	if (dump) fprintf(stderr, format: "OPENCV: Trying to disable unavailable CPU feature on the current platform: '%s'.\n",
835	getHWFeatureNameSafe(id: i));
836	}
837	have[i] = false;
838
839	found = true;
840	break;
841	}
842	}
843	if (!found)
844	{
845	if (dump) fprintf(stderr, format: "OPENCV: Trying to disable unknown CPU feature: '%s'.\n", feature.c_str());
846	}
847	}
848	}
849	}
850
851	bool have[MAX_FEATURE+`1`]{};
852	};
853
854	static HWFeatures featuresEnabled(true), featuresDisabled = HWFeatures (false);
855	static HWFeatures* currentFeatures = &featuresEnabled;
856
857	bool checkHardwareSupport(int feature)
858	{
859	CV_DbgAssert( `0` <= feature && feature <= CV_HARDWARE_MAX_FEATURE );
860	return currentFeatures->have[feature];
861	}
862
863	String getHardwareFeatureName(int feature)
864	{
865	const char* name = getHWFeatureName(id: feature);
866	return name ? String (name) : String ();
867	}
868
869	std::string getCPUFeaturesLine()
870	{
871	const int features[] = { CV_CPU_BASELINE_FEATURES, CV_CPU_DISPATCH_FEATURES };
872	const int sz = sizeof(features) / sizeof(features[`0`]);
873	std::string result;
874	std::string prefix;
875	for (int i = `1`; i < sz; ++i)
876	{
877	if (features[i] == `0`)
878	{
879	prefix = "*";
880	continue;
881	}
882	if (i != `1`) result.append(s: " ");
883	result.append(str: prefix);
884	result.append(s: getHWFeatureNameSafe(id: features[i]));
885	if (!checkHardwareSupport(feature: features[i])) result.append(s: "?");
886	}
887	return result;
888	}
889
890	volatile bool useOptimizedFlag = true;
891
892	void setUseOptimized( bool flag )
893	{
894	useOptimizedFlag = flag;
895	currentFeatures = flag ? &featuresEnabled : &featuresDisabled;
896
897	ipp::setUseIPP(flag);
898	#ifdef HAVE_OPENCL
899	ocl::setUseOpenCL(flag);
900	#endif
901	}
902
903	bool useOptimized(void)
904	{
905	return useOptimizedFlag;
906	}
907
908	int64 getTickCount(void)
909	{
910	std::chrono::steady_clock::time_point now = std::chrono::steady_clock::now();
911	return (int64)now.time_since_epoch().count();
912	}
913
914	double getTickFrequency(void)
915	{
916	using clock_period_t = std::chrono::steady_clock::duration::period;
917	double clock_freq = clock_period_t::den / clock_period_t::num;
918	return clock_freq;
919	}
920
921	#if defined __GNUC__ && (defined __i386__ \|\| defined __x86_64__ \|\| defined __ppc__)
922	#if defined(__i386__)
923
924	int64 getCPUTickCount(void)
925	{
926	int64 x;
927	__asm__ volatile (".byte 0x0f, 0x31" : "=A" (x));
928	return x;
929	}
930	#elif defined(__x86_64__)
931
932	int64 getCPUTickCount(void)
933	{
934	unsigned hi, lo;
935	__asm__ __volatile__ ("rdtsc" : "=a"(lo), "=d"(hi));
936	return (int64)lo \| ((int64)hi << `32`);
937	}
938
939	#elif defined(__ppc__)
940
941	int64 getCPUTickCount(void)
942	{
943	unsigned upper, lower, tmp;
944	__asm__ volatile(
945	"0: \n"
946	"\tmftbu %0 \n"
947	"\tmftb %1 \n"
948	"\tmftbu %2 \n"
949	"\tcmpw %2,%0 \n"
950	"\tbne 0b \n"
951	: "=r"(upper),"=r"(lower),"=r"(tmp)
952	);
953	return lower \| ((int64)upper << `32`);
954	}
955
956	#else
957
958	#error "RDTSC not defined"
959
960	#endif
961
962	#elif defined _MSC_VER && defined _WIN32 && defined _M_IX86
963
964	int64 getCPUTickCount(void)
965	{
966	__asm _emit `0x0f`;
967	__asm _emit `0x31`;
968	}
969
970	#else
971
972	//#ifdef HAVE_IPP
973	//int64 getCPUTickCount(void)
974	//{
975	// return ippGetCpuClocks();
976	//}
977	//#else
978	int64 getCPUTickCount(void)
979	{
980	return getTickCount();
981	}
982	//#endif
983
984	#endif
985
986
987	namespace internal {
988
989	class Timestamp
990	{
991	public:
992	const int64 zeroTickCount;
993	const double ns_in_ticks;
994
995	Timestamp()
996	: zeroTickCount(getTickCount())
997	, ns_in_ticks(`1e9` / getTickFrequency())
998	{
999	// nothing
1000	}
1001
1002	int64 getTimestamp()
1003	{
1004	int64 t = getTickCount();
1005	return (int64)((t - zeroTickCount) * ns_in_ticks);
1006	}
1007
1008	static Timestamp& getInstance()
1009	{
1010	static Timestamp g_timestamp;
1011	return g_timestamp;
1012	}
1013	};
1014
1015	class InitTimestamp {
1016	public:
1017	InitTimestamp() {
1018	Timestamp::getInstance();
1019	}
1020	};
1021	static InitTimestamp g_initialize_timestamp; // force zero timestamp initialization
1022
1023	} // namespace
1024
1025	int64 getTimestampNS()
1026	{
1027	return internal::Timestamp::getInstance().getTimestamp();
1028	}
1029
1030
1031	const String& getBuildInformation()
1032	{
1033	static String build_info =
1034	#include "version_string.inc"
1035	;
1036	return build_info;
1037	}
1038
1039	String getVersionString() { return String (CV_VERSION); }
1040
1041	int getVersionMajor() { return CV_VERSION_MAJOR; }
1042
1043	int getVersionMinor() { return CV_VERSION_MINOR; }
1044
1045	int getVersionRevision() { return CV_VERSION_REVISION; }
1046
1047	String format( const char* fmt, ... )
1048	{
1049	AutoBuffer<char, `1024`> buf;
1050
1051	for ( ; ; )
1052	{
1053	va_list va;
1054	va_start(va, fmt);
1055	int bsize = static_cast<int>(buf.size());
1056	int len = cv_vsnprintf(buf: buf.data(), len: bsize, fmt, args: va);
1057	va_end(va);
1058
1059	CV_Assert(len >= `0` && "Check format string for errors");
1060	if (len >= bsize)
1061	{
1062	buf.resize(size: len + `1`);
1063	continue;
1064	}
1065	buf [bsize - `1`] = `0`;
1066	return String (buf.data(), len);
1067	}
1068	}
1069
1070	String tempfile( const char* suffix )
1071	{
1072	#if OPENCV_HAVE_FILESYSTEM_SUPPORT
1073	String fname;
1074
1075	std::string temp_dir = utils::getConfigurationParameterString(name: "OPENCV_TEMP_PATH");
1076
1077	#if defined _WIN32
1078	#ifdef WINRT
1079	RoInitialize(RO_INIT_MULTITHREADED);
1080	std::wstring temp_dir_rt = GetTempPathWinRT();
1081
1082	std::wstring temp_file = GetTempFileNameWinRT(L"ocv");
1083	if (temp_file.empty())
1084	return String();
1085
1086	temp_file = temp_dir_rt.append(std::wstring(L"\\")).append(temp_file);
1087	DeleteFileW(temp_file.c_str());
1088
1089	char aname[MAX_PATH];
1090	size_t copied = wcstombs(aname, temp_file.c_str(), MAX_PATH);
1091	CV_Assert((copied != MAX_PATH) && (copied != (size_t)-`1`));
1092	fname = String(aname);
1093	RoUninitialize();
1094	#elif defined(_WIN32_WCE)
1095	const auto kMaxPathSize = MAX_PATH+`1`;
1096	wchar_t temp_dir_ce[kMaxPathSize] = {`0`};
1097	wchar_t temp_file[kMaxPathSize] = {`0`};
1098
1099	::GetTempPathW(kMaxPathSize, temp_dir_ce);
1100
1101	if(`0` != ::GetTempFileNameW(temp_dir_ce, L"ocv", `0`, temp_file)) {
1102	DeleteFileW(temp_file);
1103	char aname[MAX_PATH];
1104	size_t copied = wcstombs(aname, temp_file, MAX_PATH);
1105	CV_Assert((copied != MAX_PATH) && (copied != (size_t)-`1`));
1106	fname = String(aname);
1107	}
1108	#else
1109	char temp_dir2[MAX_PATH] = { `0` };
1110	char temp_file[MAX_PATH] = { `0` };
1111
1112	if (temp_dir.empty())
1113	{
1114	::GetTempPathA(sizeof(temp_dir2), temp_dir2);
1115	temp_dir = std::string(temp_dir2);
1116	}
1117	if(`0` == ::GetTempFileNameA(temp_dir.c_str(), "ocv", `0`, temp_file))
1118	return String();
1119
1120	DeleteFileA(temp_file);
1121
1122	fname = temp_file;
1123	#endif
1124	# else
1125	# ifdef __ANDROID__
1126	//char defaultTemplate[] = "/mnt/sdcard/__opencv_temp.XXXXXX";
1127	char defaultTemplate[] = "/data/local/tmp/__opencv_temp.XXXXXX";
1128	# else
1129	char defaultTemplate[] = "/tmp/__opencv_temp.XXXXXX";
1130	# endif
1131
1132	if (temp_dir.empty())
1133	fname = defaultTemplate;
1134	else
1135	{
1136	fname = temp_dir;
1137	char ech = fname [fname.size() - `1`];
1138	if(ech != `'/'` && ech != `'\\'`)
1139	fname = fname + "/";
1140	fname = fname + "__opencv_temp.XXXXXX";
1141	}
1142
1143	const int fd = mkstemp(template: (char*)fname.c_str());
1144	if (fd == -`1`) return String ();
1145
1146	close(fd: fd);
1147	remove(filename: fname.c_str());
1148	# endif
1149
1150	if (suffix)
1151	{
1152	if (suffix[`0`] != `'.'`)
1153	return fname + "." + suffix;
1154	else
1155	return fname + suffix;
1156	}
1157	return fname;
1158	#else // OPENCV_HAVE_FILESYSTEM_SUPPORT
1159	CV_UNUSED(suffix);
1160	CV_Error(Error::StsNotImplemented, "File system support is disabled in this OpenCV build!");
1161	#endif // OPENCV_HAVE_FILESYSTEM_SUPPORT
1162	}
1163
1164	static ErrorCallback customErrorCallback = `0`;
1165	static void* customErrorCallbackData = `0`;
1166	static bool breakOnError = false;
1167
1168	bool setBreakOnError(bool value)
1169	{
1170	bool prevVal = breakOnError;
1171	breakOnError = value;
1172	return prevVal;
1173	}
1174
1175	int cv_snprintf(char* buf, int len, const char* fmt, ...)
1176	{
1177	va_list va;
1178	va_start(va, fmt);
1179	int res = cv_vsnprintf(buf, len, fmt, args: va);
1180	va_end(va);
1181	return res;
1182	}
1183
1184	int cv_vsnprintf(char* buf, int len, const char* fmt, va_list args)
1185	{
1186	#if defined _MSC_VER
1187	if (len <= `0`) return len == `0` ? `1024` : -`1`;
1188	int res = _vsnprintf_s(buf, len, _TRUNCATE, fmt, args);
1189	// ensure null terminating on VS
1190	if (res >= `0` && res < len)
1191	{
1192	buf[res] = `0`;
1193	return res;
1194	}
1195	else
1196	{
1197	buf[len - `1`] = `0`; // truncate happened
1198	return res >= len ? res : (len * `2`);
1199	}
1200	#else
1201	return vsnprintf(s: buf, maxlen: len, format: fmt, arg: args);
1202	#endif
1203	}
1204
1205	static void dumpException(const Exception& exc)
1206	{
1207	const char* errorStr = cvErrorStr(status: exc.code);
1208	char buf[`1` << `12`];
1209
1210	cv_snprintf(buf, len: sizeof(buf),
1211	fmt: "OpenCV(%s) Error: %s (%s) in %s, file %s, line %d",
1212	CV_VERSION,
1213	errorStr, exc.err.c_str(), exc.func.size() > `0` ?
1214	exc.func.c_str() : "unknown function", exc.file.c_str(), exc.line);
1215	#ifdef __ANDROID__
1216	__android_log_print(ANDROID_LOG_ERROR, "cv::error()", "%s", buf);
1217	#else
1218	fflush(stdout); fflush(stderr);
1219	fprintf(stderr, format: "%s\n", buf);
1220	fflush(stderr);
1221	#endif
1222	}
1223
1224	#ifdef CV_ERROR_SET_TERMINATE_HANDLER
1225	static bool cv_terminate_handler_installed = false;
1226	static std::terminate_handler cv_old_terminate_handler;
1227	static cv::Exception cv_terminate_handler_exception;
1228	static bool param_setupTerminateHandler = utils::getConfigurationParameterBool("OPENCV_SETUP_TERMINATE_HANDLER", true);
1229	static void cv_terminate_handler() {
1230	std::cerr << "OpenCV: terminate handler is called! The last OpenCV error is:\n";
1231	dumpException(cv_terminate_handler_exception);
1232	if (false /cv_old_terminate_handler/) // buggy behavior is observed with doubled "abort/retry/ignore" windows
1233	cv_old_terminate_handler();
1234	abort();
1235	}
1236
1237	#endif
1238
1239	#ifdef __GNUC__
1240	# if defined __clang__ \|\| defined __APPLE__
1241	# pragma GCC diagnostic push
1242	# pragma GCC diagnostic ignored "-Winvalid-noreturn"
1243	# endif
1244	#endif
1245
1246	void error( const Exception& exc )
1247	{
1248	#ifdef CV_ERROR_SET_TERMINATE_HANDLER
1249	{
1250	cv::AutoLock lock(getInitializationMutex());
1251	if (!cv_terminate_handler_installed)
1252	{
1253	if (param_setupTerminateHandler)
1254	cv_old_terminate_handler = std::set_terminate(cv_terminate_handler);
1255	cv_terminate_handler_installed = true;
1256	}
1257	cv_terminate_handler_exception = exc;
1258	}
1259	#endif
1260
1261	if (customErrorCallback != `0`)
1262	customErrorCallback(exc.code, exc.func.c_str(), exc.err.c_str(),
1263	exc.file.c_str(), exc.line, customErrorCallbackData);
1264	else if (param_dumpErrors)
1265	{
1266	dumpException(exc);
1267	}
1268
1269	if(breakOnError)
1270	{
1271	static volatile int* p = `0`;
1272	*p = `0`;
1273	}
1274
1275	throw exc;
1276	#ifdef __GNUC__
1277	# if !defined __clang__ && !defined __APPLE__
1278	// this suppresses this warning: "noreturn" function does return [enabled by default]
1279	__builtin_trap();
1280	// or use infinite loop: for (;;) {}
1281	# endif
1282	#endif
1283	}
1284
1285	void error(int _code, const String& _err, const char* _func, const char* _file, int _line)
1286	{
1287	error(exc: cv::Exception (_code, _err, _func, _file, _line));
1288	#ifdef __GNUC__
1289	# if !defined __clang__ && !defined __APPLE__
1290	// this suppresses this warning: "noreturn" function does return [enabled by default]
1291	__builtin_trap();
1292	// or use infinite loop: for (;;) {}
1293	# endif
1294	#endif
1295	}
1296
1297	#ifdef __GNUC__
1298	# if defined __clang__ \|\| defined __APPLE__
1299	# pragma GCC diagnostic pop
1300	# endif
1301	#endif
1302
1303
1304	ErrorCallback
1305	redirectError( ErrorCallback errCallback, void* userdata, void** prevUserdata)
1306	{
1307	if( prevUserdata )
1308	*prevUserdata = customErrorCallbackData;
1309
1310	ErrorCallback prevCallback = customErrorCallback;
1311
1312	customErrorCallback = errCallback;
1313	customErrorCallbackData = userdata;
1314
1315	return prevCallback;
1316	}
1317
1318	void terminate(int _code, const String& _err, const char* _func, const char* _file, int _line) CV_NOEXCEPT
1319	{
1320	dumpException(exc: cv::Exception (_code, _err, _func, _file, _line));
1321	std::terminate();
1322	}
1323
1324	}
1325
1326	CV_IMPL int cvCheckHardwareSupport(int feature)
1327	{
1328	CV_DbgAssert( `0` <= feature && feature <= CV_HARDWARE_MAX_FEATURE );
1329	return cv::currentFeatures->have[feature];
1330	}
1331
1332	CV_IMPL int cvUseOptimized( int flag )
1333	{
1334	int prevMode = cv::useOptimizedFlag;
1335	cv::setUseOptimized( flag != `0` );
1336	return prevMode;
1337	}
1338
1339	CV_IMPL int64 cvGetTickCount(void)
1340	{
1341	return cv::getTickCount();
1342	}
1343
1344	CV_IMPL double cvGetTickFrequency(void)
1345	{
1346	return cv::getTickFrequency()*`1e-6`;
1347	}
1348
1349	CV_IMPL CvErrorCallback
1350	cvRedirectError( CvErrorCallback errCallback, void* userdata, void** prevUserdata)
1351	{
1352	return cv::redirectError(errCallback, userdata, prevUserdata);
1353	}
1354
1355	CV_IMPL int cvNulDevReport( int, const char, const* char*,
1356	const char, int, void** )
1357	{
1358	return `0`;
1359	}
1360
1361	CV_IMPL int cvStdErrReport( int, const char, const* char*,
1362	const char, int, void** )
1363	{
1364	return `0`;
1365	}
1366
1367	CV_IMPL int cvGuiBoxReport( int, const char, const* char*,
1368	const char, int, void** )
1369	{
1370	return `0`;
1371	}
1372
1373	CV_IMPL int cvGetErrInfo( const char*, const* char*, const* char*, int** )
1374	{
1375	return `0`;
1376	}
1377
1378
1379	CV_IMPL const char* cvErrorStr( int status )
1380	{
1381	static char buf[`256`];
1382
1383	switch (status)
1384	{
1385	case cv::Error::StsOk : return "No Error";
1386	case cv::Error::StsBackTrace : return "Backtrace";
1387	case cv::Error::StsError : return "Unspecified error";
1388	case cv::Error::StsInternal : return "Internal error";
1389	case cv::Error::StsNoMem : return "Insufficient memory";
1390	case cv::Error::StsBadArg : return "Bad argument";
1391	case cv::Error::StsNoConv : return "Iterations do not converge";
1392	case cv::Error::StsAutoTrace : return "Autotrace call";
1393	case cv::Error::StsBadSize : return "Incorrect size of input array";
1394	case cv::Error::StsNullPtr : return "Null pointer";
1395	case cv::Error::StsDivByZero : return "Division by zero occurred";
1396	case cv::Error::BadStep : return "Image step is wrong";
1397	case cv::Error::StsInplaceNotSupported : return "Inplace operation is not supported";
1398	case cv::Error::StsObjectNotFound : return "Requested object was not found";
1399	case cv::Error::BadDepth : return "Input image depth is not supported by function";
1400	case cv::Error::StsUnmatchedFormats : return "Formats of input arguments do not match";
1401	case cv::Error::StsUnmatchedSizes : return "Sizes of input arguments do not match";
1402	case cv::Error::StsOutOfRange : return "One of the arguments\' values is out of range";
1403	case cv::Error::StsUnsupportedFormat : return "Unsupported format or combination of formats";
1404	case cv::Error::BadCOI : return "Input COI is not supported";
1405	case cv::Error::BadNumChannels : return "Bad number of channels";
1406	case cv::Error::StsBadFlag : return "Bad flag (parameter or structure field)";
1407	case cv::Error::StsBadPoint : return "Bad parameter of type CvPoint";
1408	case cv::Error::StsBadMask : return "Bad type of mask argument";
1409	case cv::Error::StsParseError : return "Parsing error";
1410	case cv::Error::StsNotImplemented : return "The function/feature is not implemented";
1411	case cv::Error::StsBadMemBlock : return "Memory block has been corrupted";
1412	case cv::Error::StsAssert : return "Assertion failed";
1413	case cv::Error::GpuNotSupported : return "No CUDA support";
1414	case cv::Error::GpuApiCallError : return "Gpu API call";
1415	case cv::Error::OpenGlNotSupported : return "No OpenGL support";
1416	case cv::Error::OpenGlApiCallError : return "OpenGL API call";
1417	};
1418
1419	snprintf(s: buf, maxlen: sizeof(buf), format: "Unknown %s code %d", status >= `0` ? "status":"error", status);
1420	return buf;
1421	}
1422
1423	CV_IMPL int cvGetErrMode(void)
1424	{
1425	return `0`;
1426	}
1427
1428	CV_IMPL int cvSetErrMode(int)
1429	{
1430	return `0`;
1431	}
1432
1433	CV_IMPL int cvGetErrStatus(void)
1434	{
1435	return `0`;
1436	}
1437
1438	CV_IMPL void cvSetErrStatus(int)
1439	{
1440	}
1441
1442
1443	CV_IMPL void cvError( int code, const char* func_name,
1444	const char* err_msg,
1445	const char* file_name, int line )
1446	{
1447	cv::error(exc: cv::Exception (code, err_msg, func_name, file_name, line));
1448	}
1449
1450	/ function, which converts int to int /
1451	CV_IMPL int
1452	cvErrorFromIppStatus( int status )
1453	{
1454	switch (status)
1455	{
1456	case CV_BADSIZE_ERR: return cv::Error::StsBadSize;
1457	case CV_BADMEMBLOCK_ERR: return cv::Error::StsBadMemBlock;
1458	case CV_NULLPTR_ERR: return cv::Error::StsNullPtr;
1459	case CV_DIV_BY_ZERO_ERR: return cv::Error::StsDivByZero;
1460	case CV_BADSTEP_ERR: return cv::Error::BadStep;
1461	case CV_OUTOFMEM_ERR: return cv::Error::StsNoMem;
1462	case CV_BADARG_ERR: return cv::Error::StsBadArg;
1463	case CV_NOTDEFINED_ERR: return cv::Error::StsError;
1464	case CV_INPLACE_NOT_SUPPORTED_ERR: return cv::Error::StsInplaceNotSupported;
1465	case CV_NOTFOUND_ERR: return cv::Error::StsObjectNotFound;
1466	case CV_BADCONVERGENCE_ERR: return cv::Error::StsNoConv;
1467	case CV_BADDEPTH_ERR: return cv::Error::BadDepth;
1468	case CV_UNMATCHED_FORMATS_ERR: return cv::Error::StsUnmatchedFormats;
1469	case CV_UNSUPPORTED_COI_ERR: return cv::Error::BadCOI;
1470	case CV_UNSUPPORTED_CHANNELS_ERR: return cv::Error::BadNumChannels;
1471	case CV_BADFLAG_ERR: return cv::Error::StsBadFlag;
1472	case CV_BADRANGE_ERR: return cv::Error::StsBadArg;
1473	case CV_BADCOEF_ERR: return cv::Error::StsBadArg;
1474	case CV_BADFACTOR_ERR: return cv::Error::StsBadArg;
1475	case CV_BADPOINT_ERR: return cv::Error::StsBadPoint;
1476
1477	default:
1478	return cv::Error::StsError;
1479	}
1480	}
1481
1482	namespace cv {
1483	bool __termination = false;
1484
1485
1486	//////////////////////////////// thread-local storage ////////////////////////////////
1487
1488	namespace details {
1489
1490	#ifndef OPENCV_DISABLE_THREAD_SUPPORT
1491
1492	#ifdef _WIN32
1493	#ifdef _MSC_VER
1494	#pragma warning(disable:4505) // unreferenced local function has been removed
1495	#endif
1496	#ifndef TLS_OUT_OF_INDEXES
1497	#define TLS_OUT_OF_INDEXES ((DWORD)0xFFFFFFFF)
1498	#endif
1499	#endif
1500
1501	// TLS platform abstraction layer
1502	class TlsAbstraction
1503	{
1504	public:
1505	TlsAbstraction();
1506	~TlsAbstraction()
1507	{
1508	// TlsAbstraction singleton should not be released
1509	// There is no reliable way to avoid problems caused by static initialization order fiasco
1510	// NB: Do NOT use logging here
1511	fprintf(stderr, format: "OpenCV FATAL: TlsAbstraction::~TlsAbstraction() call is not expected\n");
1512	fflush(stderr);
1513	}
1514
1515	void* getData() const;
1516	void setData(void *pData);
1517
1518	void releaseSystemResources();
1519
1520	private:
1521
1522	#ifdef _WIN32
1523	#ifndef WINRT
1524	DWORD tlsKey;
1525	bool disposed;
1526	#endif
1527	#else // _WIN32
1528	pthread_key_t tlsKey;
1529	std::atomic<bool> disposed;
1530	#endif
1531	};
1532
1533	class TlsAbstractionReleaseGuard
1534	{
1535	TlsAbstraction& tls_;
1536	public:
1537	TlsAbstractionReleaseGuard(TlsAbstraction& tls) : tls_(tls)
1538	{
1539	/ nothing /
1540	}
1541	~TlsAbstractionReleaseGuard()
1542	{
1543	tls_.releaseSystemResources();
1544	}
1545	};
1546
1547	// TODO use reference
1548	static TlsAbstraction* getTlsAbstraction()
1549	{
1550	static TlsAbstraction g_tls = new* TlsAbstraction (); // memory leak is intended here to avoid disposing of TLS container
1551	static TlsAbstractionReleaseGuard g_tlsReleaseGuard(*g_tls);
1552	return g_tls;
1553	}
1554
1555
1556	#ifdef _WIN32
1557	#ifdef WINRT
1558	static __declspec( thread ) void* tlsData = NULL; // using C++11 thread attribute for local thread data
1559	TlsAbstraction::TlsAbstraction() {}
1560	void TlsAbstraction::releaseSystemResources()
1561	{
1562	cv::__termination = true; // DllMain is missing in static builds
1563	}
1564	void* TlsAbstraction::getData() const
1565	{
1566	return tlsData;
1567	}
1568	void TlsAbstraction::setData(void *pData)
1569	{
1570	tlsData = pData;
1571	}
1572	#else //WINRT
1573	#ifdef CV_USE_FLS
1574	static void NTAPI opencv_fls_destructor(void* pData);
1575	#endif // CV_USE_FLS
1576	TlsAbstraction::TlsAbstraction()
1577	: disposed(false)
1578	{
1579	#ifndef CV_USE_FLS
1580	tlsKey = TlsAlloc();
1581	#else // CV_USE_FLS
1582	tlsKey = FlsAlloc(opencv_fls_destructor);
1583	#endif // CV_USE_FLS
1584	CV_Assert(tlsKey != TLS_OUT_OF_INDEXES);
1585	}
1586	void TlsAbstraction::releaseSystemResources()
1587	{
1588	cv::__termination = true; // DllMain is missing in static builds
1589	disposed = true;
1590	#ifndef CV_USE_FLS
1591	TlsFree(tlsKey);
1592	#else // CV_USE_FLS
1593	FlsFree(tlsKey);
1594	#endif // CV_USE_FLS
1595	tlsKey = TLS_OUT_OF_INDEXES;
1596	}
1597	void* TlsAbstraction::getData() const
1598	{
1599	if (disposed)
1600	return NULL;
1601	#ifndef CV_USE_FLS
1602	return TlsGetValue(tlsKey);
1603	#else // CV_USE_FLS
1604	return FlsGetValue(tlsKey);
1605	#endif // CV_USE_FLS
1606	}
1607	void TlsAbstraction::setData(void *pData)
1608	{
1609	if (disposed)
1610	return; // no-op
1611	#ifndef CV_USE_FLS
1612	CV_Assert(TlsSetValue(tlsKey, pData) == TRUE);
1613	#else // CV_USE_FLS
1614	CV_Assert(FlsSetValue(tlsKey, pData) == TRUE);
1615	#endif // CV_USE_FLS
1616	}
1617	#endif // WINRT
1618	#else // _WIN32
1619	static void opencv_tls_destructor(void* pData);
1620	TlsAbstraction::TlsAbstraction()
1621	: disposed (false)
1622	{
1623	CV_Assert(pthread_key_create(&tlsKey, opencv_tls_destructor) == `0`);
1624	}
1625	void TlsAbstraction::releaseSystemResources()
1626	{
1627	cv::__termination = true; // DllMain is missing in static builds
1628	disposed = true;
1629	if (pthread_key_delete(key: tlsKey) != `0`)
1630	{
1631	// Don't use logging here
1632	fprintf(stderr, format: "OpenCV ERROR: TlsAbstraction::~TlsAbstraction(): pthread_key_delete() call failed\n");
1633	fflush(stderr);
1634	}
1635	}
1636	void* TlsAbstraction::getData() const
1637	{
1638	if (disposed)
1639	return NULL;
1640	return pthread_getspecific(key: tlsKey);
1641	}
1642	void TlsAbstraction::setData(void *pData)
1643	{
1644	if (disposed)
1645	return; // no-op
1646	CV_Assert(pthread_setspecific(tlsKey, pData) == `0`);
1647	}
1648	#endif
1649
1650	// Per-thread data structure
1651	struct ThreadData
1652	{
1653	ThreadData()
1654	{
1655	idx = `0`;
1656	slots.reserve(n: `32`);
1657	}
1658
1659	std::vector<void> slots; // Data array for a thread*
1660	size_t idx; // Thread index in TLS storage. This is not OS thread ID!
1661	};
1662
1663
1664	static bool g_isTlsStorageInitialized = false;
1665
1666	// Main TLS storage class
1667	class TlsStorage
1668	{
1669	public:
1670	TlsStorage() :
1671	tlsSlotsSize(`0`)
1672	{
1673	(void)getTlsAbstraction(); // ensure singeton initialization (for correct order of atexit calls)
1674	tlsSlots.reserve(n: `32`);
1675	threads.reserve(n: `32`);
1676	g_isTlsStorageInitialized = true;
1677	}
1678	~TlsStorage()
1679	{
1680	// TlsStorage object should not be released
1681	// There is no reliable way to avoid problems caused by static initialization order fiasco
1682	// Don't use logging here
1683	fprintf(stderr, format: "OpenCV FATAL: TlsStorage::~TlsStorage() call is not expected\n");
1684	fflush(stderr);
1685	}
1686
1687	void releaseThread(void* tlsValue = NULL)
1688	{
1689	TlsAbstraction* tls = getTlsAbstraction();
1690	if (NULL == tls)
1691	return; // TLS singleton is not available (terminated)
1692	ThreadData pTD = tlsValue == NULL ? (ThreadData)tls->getData() : (ThreadData*)tlsValue;
1693	if (pTD == NULL)
1694	return; // no OpenCV TLS data for this thread
1695	AutoLock guard(mtxGlobalAccess);
1696	for (size_t i = `0`; i < threads.size(); i++)
1697	{
1698	if (pTD == threads [i])
1699	{
1700	threads [i] = NULL;
1701	if (tlsValue == NULL)
1702	tls->setData(`0`);
1703	std::vector<void*>& thread_slots = pTD->slots;
1704	for (size_t slotIdx = `0`; slotIdx < thread_slots.size(); slotIdx++)
1705	{
1706	void* pData = thread_slots [slotIdx];
1707	thread_slots [slotIdx] = NULL;
1708	if (!pData)
1709	continue;
1710	TLSDataContainer* container = tlsSlots [slotIdx].container;
1711	if (container)
1712	container->deleteDataInstance(pData);
1713	else
1714	{
1715	fprintf(stderr, format: "OpenCV ERROR: TLS: container for slotIdx=%d is NULL. Can't release thread data\n", (int)slotIdx);
1716	fflush(stderr);
1717	}
1718	}
1719	delete pTD;
1720	return;
1721	}
1722	}
1723	fprintf(stderr, format: "OpenCV WARNING: TLS: Can't release thread TLS data (unknown pointer or data race): %p\n", (void*)pTD); fflush(stderr);
1724	}
1725
1726	// Reserve TLS storage index
1727	size_t reserveSlot(TLSDataContainer* container)
1728	{
1729	AutoLock guard(mtxGlobalAccess);
1730	CV_Assert(tlsSlotsSize == tlsSlots.size());
1731
1732	// Find unused slots
1733	for(size_t slot = `0`; slot < tlsSlotsSize; slot++)
1734	{
1735	if (tlsSlots [slot].container == NULL)
1736	{
1737	tlsSlots [slot].container = container;
1738	return slot;
1739	}
1740	}
1741
1742	// Create new slot
1743	tlsSlots.push_back(x: TlsSlotInfo (container)); tlsSlotsSize++;
1744	return tlsSlotsSize - `1`;
1745	}
1746
1747	// Release TLS storage index and pass associated data to caller
1748	void releaseSlot(size_t slotIdx, std::vector<void> &dataVec, bool* keepSlot = false)
1749	{
1750	AutoLock guard(mtxGlobalAccess);
1751	CV_Assert(tlsSlotsSize == tlsSlots.size());
1752	CV_Assert(tlsSlotsSize > slotIdx);
1753
1754	for(size_t i = `0`; i < threads.size(); i++)
1755	{
1756	if(threads [i])
1757	{
1758	std::vector<void*>& thread_slots = threads [i]->slots;
1759	if (thread_slots.size() > slotIdx && thread_slots [slotIdx])
1760	{
1761	dataVec.push_back(x: thread_slots [slotIdx]);
1762	thread_slots [slotIdx] = NULL;
1763	}
1764	}
1765	}
1766
1767	if (!keepSlot)
1768	{
1769	tlsSlots [slotIdx].container = NULL; // mark slot as free (see reserveSlot() implementation)
1770	}
1771	}
1772
1773	// Get data by TLS storage index
1774	void* getData(size_t slotIdx) const
1775	{
1776	#ifndef CV_THREAD_SANITIZER
1777	CV_Assert(tlsSlotsSize > slotIdx);
1778	#endif
1779
1780	TlsAbstraction* tls = getTlsAbstraction();
1781	if (NULL == tls)
1782	return NULL; // TLS singleton is not available (terminated)
1783
1784	ThreadData* threadData = (ThreadData*)tls->getData();
1785	if(threadData && threadData->slots.size() > slotIdx)
1786	return threadData->slots [slotIdx];
1787
1788	return NULL;
1789	}
1790
1791	// Gather data from threads by TLS storage index
1792	void gather(size_t slotIdx, std::vector<void*> &dataVec)
1793	{
1794	AutoLock guard(mtxGlobalAccess);
1795	CV_Assert(tlsSlotsSize == tlsSlots.size());
1796	CV_Assert(tlsSlotsSize > slotIdx);
1797
1798	for(size_t i = `0`; i < threads.size(); i++)
1799	{
1800	if(threads [i])
1801	{
1802	std::vector<void*>& thread_slots = threads [i]->slots;
1803	if (thread_slots.size() > slotIdx && thread_slots [slotIdx])
1804	dataVec.push_back(x: thread_slots [slotIdx]);
1805	}
1806	}
1807	}
1808
1809	// Set data to storage index
1810	void setData(size_t slotIdx, void* pData)
1811	{
1812	#ifndef CV_THREAD_SANITIZER
1813	CV_Assert(tlsSlotsSize > slotIdx);
1814	#endif
1815
1816	TlsAbstraction* tls = getTlsAbstraction();
1817	if (NULL == tls)
1818	return; // TLS singleton is not available (terminated)
1819
1820	ThreadData* threadData = (ThreadData*)tls->getData();
1821	if(!threadData)
1822	{
1823	threadData = new ThreadData;
1824	tls->setData((void*)threadData);
1825	{
1826	AutoLock guard(mtxGlobalAccess);
1827
1828	bool found = false;
1829	// Find unused slots
1830	for(size_t slot = `0`; slot < threads.size(); slot++)
1831	{
1832	if (threads [slot] == NULL)
1833	{
1834	threadData->idx = (int)slot;
1835	threads [slot] = threadData;
1836	found = true;
1837	break;
1838	}
1839	}
1840
1841	if (!found)
1842	{
1843	// Create new slot
1844	threadData->idx = threads.size();
1845	threads.push_back(x: threadData);
1846	}
1847	}
1848	}
1849
1850	if(slotIdx >= threadData->slots.size())
1851	{
1852	AutoLock guard(mtxGlobalAccess); // keep synchronization with gather() calls
1853	threadData->slots.resize(new_size: slotIdx + `1`, NULL);
1854	}
1855	threadData->slots [slotIdx] = pData;
1856	}
1857
1858	private:
1859	Mutex mtxGlobalAccess; // Shared objects operation guard
1860	size_t tlsSlotsSize; // equal to tlsSlots.size() in synchronized sections
1861	// without synchronization this counter doesn't decrease - it is used for slotIdx sanity checks
1862
1863	struct TlsSlotInfo
1864	{
1865	TlsSlotInfo(TLSDataContainer* _container) : container(_container) {}
1866	TLSDataContainer* container; // attached container (to dispose data of terminated threads)
1867	};
1868	std::vector<struct TlsSlotInfo> tlsSlots; // TLS keys state
1869	std::vector<ThreadData> threads; // Array for all allocated data. Thread data pointers are placed here to allow data cleanup*
1870	};
1871
1872	// Create global TLS storage object
1873	static TlsStorage &getTlsStorage()
1874	{
1875	CV_SINGLETON_LAZY_INIT_REF(TlsStorage, new TlsStorage ())
1876	}
1877
1878	#ifndef _WIN32 // pthread key destructor
1879	static void opencv_tls_destructor(void* pData)
1880	{
1881	if (!g_isTlsStorageInitialized)
1882	return; // nothing to release, so prefer to avoid creation of new global structures
1883	getTlsStorage().releaseThread(tlsValue: pData);
1884	}
1885	#else // _WIN32
1886	#ifdef CV_USE_FLS
1887	static void WINAPI opencv_fls_destructor(void* pData)
1888	{
1889	// Empiric detection of ExitProcess call
1890	DWORD code = STILL_ACTIVE/259/;
1891	BOOL res = GetExitCodeProcess(GetCurrentProcess(), &code);
1892	if (res && code != STILL_ACTIVE)
1893	{
1894	// Looks like we are in ExitProcess() call
1895	// This is FLS specific only because their callback is called before DllMain.
1896	// TLS doesn't have similar problem, DllMain() is called first which mark __termination properly.
1897	// Note: this workaround conflicts with ExitProcess() steps order described in documentation, however it works:
1898	// 3. ... called with DLL_PROCESS_DETACH
1899	// 7. The termination status of the process changes from STILL_ACTIVE to the exit value of the process.
1900	// (ref: https://docs.microsoft.com/en-us/windows/win32/api/processthreadsapi/nf-processthreadsapi-exitprocess)
1901	cv::__termination = true;
1902	}
1903
1904	if (!g_isTlsStorageInitialized)
1905	return; // nothing to release, so prefer to avoid creation of new global structures
1906	getTlsStorage().releaseThread(pData);
1907	}
1908	#endif // CV_USE_FLS
1909	#endif // _WIN32
1910
1911	static TlsStorage* const g_force_initialization_of_TlsStorage
1912	#if defined __GNUC__
1913	__attribute__((unused))
1914	#endif
1915	= &getTlsStorage();
1916
1917
1918	#else // OPENCV_DISABLE_THREAD_SUPPORT
1919
1920	// no threading (OPENCV_DISABLE_THREAD_SUPPORT=ON)
1921	class TlsStorage
1922	{
1923	public:
1924	TlsStorage()
1925	{
1926	slots.reserve(`32`);
1927	}
1928	~TlsStorage()
1929	{
1930	for (size_t slotIdx = `0`; slotIdx < slots.size(); slotIdx++)
1931	{
1932	SlotInfo& s = slots[slotIdx];
1933	TLSDataContainer* container = s.container;
1934	if (container && s.data)
1935	{
1936	container->deleteDataInstance(s.data); // Can't use from SlotInfo destructor
1937	s.data = nullptr;
1938	}
1939	}
1940	}
1941
1942	// Reserve TLS storage index
1943	size_t reserveSlot(TLSDataContainer* container)
1944	{
1945	size_t slotsSize = slots.size();
1946	for (size_t slot = `0`; slot < slotsSize; slot++)
1947	{
1948	SlotInfo& s = slots[slot];
1949	if (s.container == NULL)
1950	{
1951	CV_Assert(!s.data);
1952	s.container = container;
1953	return slot;
1954	}
1955	}
1956
1957	// create new slot
1958	slots.push_back(SlotInfo(container));
1959	return slotsSize;
1960	}
1961
1962	// Release TLS storage index and pass associated data to caller
1963	void releaseSlot(size_t slotIdx, std::vector<void> &dataVec, bool* keepSlot = false)
1964	{
1965	CV_Assert(slotIdx < slots.size());
1966	SlotInfo& s = slots[slotIdx];
1967	void* data = s.data;
1968	if (data)
1969	{
1970	dataVec.push_back(data);
1971	s.data = nullptr;
1972	}
1973	if (!keepSlot)
1974	{
1975	s.container = NULL; // mark slot as free (see reserveSlot() implementation)
1976	}
1977	}
1978
1979	// Get data by TLS storage index
1980	void* getData(size_t slotIdx) const
1981	{
1982	CV_Assert(slotIdx < slots.size());
1983	const SlotInfo& s = slots[slotIdx];
1984	return s.data;
1985	}
1986
1987	// Gather data from threads by TLS storage index
1988	void gather(size_t slotIdx, std::vector<void*> &dataVec)
1989	{
1990	CV_Assert(slotIdx < slots.size());
1991	SlotInfo& s = slots[slotIdx];
1992	void* data = s.data;
1993	if (data)
1994	dataVec.push_back(data);
1995	return;
1996	}
1997
1998	// Set data to storage index
1999	void setData(size_t slotIdx, void* pData)
2000	{
2001	CV_Assert(slotIdx < slots.size());
2002	SlotInfo& s = slots[slotIdx];
2003	s.data = pData;
2004	}
2005
2006	private:
2007	struct SlotInfo
2008	{
2009	SlotInfo(TLSDataContainer* _container) : container(_container), data(nullptr) {}
2010	TLSDataContainer* container; // attached container (to dispose data)
2011	void* data;
2012	};
2013	std::vector<struct SlotInfo> slots;
2014	};
2015
2016	static TlsStorage& getTlsStorage()
2017	{
2018	static TlsStorage g_storage; // no threading
2019	return g_storage;
2020	}
2021
2022	#endif // OPENCV_DISABLE_THREAD_SUPPORT
2023
2024	} // namespace details
2025	using namespace details;
2026
2027	void releaseTlsStorageThread()
2028	{
2029	#ifndef OPENCV_DISABLE_THREAD_SUPPORT
2030	if (!g_isTlsStorageInitialized)
2031	return; // nothing to release, so prefer to avoid creation of new global structures
2032	getTlsStorage().releaseThread();
2033	#endif
2034	}
2035
2036	TLSDataContainer::TLSDataContainer()
2037	{
2038	key_ = (int)getTlsStorage().reserveSlot(container: this); // Reserve key from TLS storage
2039	}
2040
2041	TLSDataContainer::~TLSDataContainer()
2042	{
2043	CV_Assert(key_ == -`1`); // Key must be released in child object
2044	}
2045
2046	void TLSDataContainer::gatherData(std::vector<void> &data) const*
2047	{
2048	getTlsStorage().gather(slotIdx: key_, dataVec&: data);
2049	}
2050
2051	void TLSDataContainer::detachData(std::vector<void*> &data)
2052	{
2053	getTlsStorage().releaseSlot(slotIdx: key_, dataVec&: data, keepSlot: true);
2054	}
2055
2056	void TLSDataContainer::release()
2057	{
2058	if (key_ == -`1`)
2059	return; // already released
2060	std::vector<void*> data; data.reserve(n: `32`);
2061	getTlsStorage().releaseSlot(slotIdx: key_, dataVec&: data, keepSlot: false); // Release key and get stored data for proper destruction
2062	key_ = -`1`;
2063	for(size_t i = `0`; i < data.size(); i++) // Delete all associated data
2064	deleteDataInstance(pData: data [i]);
2065	}
2066
2067	void TLSDataContainer::cleanup()
2068	{
2069	std::vector<void*> data; data.reserve(n: `32`);
2070	getTlsStorage().releaseSlot(slotIdx: key_, dataVec&: data, keepSlot: true); // Extract stored data with removal from TLS tables
2071	for(size_t i = `0`; i < data.size(); i++) // Delete all associated data
2072	deleteDataInstance(pData: data [i]);
2073	}
2074
2075	void* TLSDataContainer::getData() const
2076	{
2077	CV_Assert(key_ != -`1` && "Can't fetch data from terminated TLS container.");
2078	void* pData = getTlsStorage().getData(slotIdx: key_); // Check if data was already allocated
2079	if(!pData)
2080	{
2081	// Create new data instance and save it to TLS storage
2082	pData = createDataInstance();
2083	try
2084	{
2085	getTlsStorage().setData(slotIdx: key_, pData);
2086	}
2087	catch (...)
2088	{
2089	deleteDataInstance(pData);
2090	throw;
2091	}
2092	}
2093	return pData;
2094	}
2095
2096	static TLSData<CoreTLSData>& getCoreTlsDataTLS()
2097	{
2098	CV_SINGLETON_LAZY_INIT_REF(TLSData<CoreTLSData>, new TLSData<CoreTLSData>())
2099	}
2100
2101	CoreTLSData& getCoreTlsData()
2102	{
2103	return getCoreTlsDataTLS().getRef();
2104	}
2105
2106	#if defined CVAPI_EXPORTS && defined _WIN32 && !defined WINCE
2107	#ifdef WINRT
2108	#pragma warning(disable:4447) // Disable warning 'main' signature found without threading model
2109	#endif
2110
2111	extern "C"
2112	BOOL WINAPI DllMain(HINSTANCE, DWORD fdwReason, LPVOID lpReserved);
2113
2114	extern "C"
2115	BOOL WINAPI DllMain(HINSTANCE, DWORD fdwReason, LPVOID lpReserved)
2116	{
2117	if (fdwReason == DLL_THREAD_DETACH \|\| fdwReason == DLL_PROCESS_DETACH)
2118	{
2119	if (lpReserved != NULL) // called after ExitProcess() call
2120	{
2121	cv::__termination = true;
2122	}
2123	else
2124	{
2125	// Not allowed to free resources if lpReserved is non-null
2126	// http://msdn.microsoft.com/en-us/library/windows/desktop/ms682583.aspx
2127	releaseTlsStorageThread();
2128	}
2129	}
2130	return TRUE;
2131	}
2132	#endif
2133
2134
2135	namespace {
2136
2137	#ifdef OPENCV_WITH_ITT
2138	bool overrideThreadName()
2139	{
2140	static bool param = utils::getConfigurationParameterBool(name: "OPENCV_TRACE_ITT_SET_THREAD_NAME", defaultValue: false);
2141	return param;
2142	}
2143	#endif
2144
2145	static int g_threadNum = `0`;
2146	class ThreadID {
2147	public:
2148	const int id;
2149	ThreadID() :
2150	id(CV_XADD(&g_threadNum, `1`))
2151	{
2152	#ifdef OPENCV_WITH_ITT
2153	if (overrideThreadName())
2154	__itt_thread_set_name(cv::format(fmt: "OpenCVThread-%03d", id).c_str());
2155	#endif
2156	}
2157	};
2158
2159	static TLSData<ThreadID>& getThreadIDTLS()
2160	{
2161	CV_SINGLETON_LAZY_INIT_REF(TLSData<ThreadID>, new TLSData<ThreadID>());
2162	}
2163
2164	} // namespace
2165	int utils::getThreadID() { return getThreadIDTLS().get()->id; }
2166
2167
2168	class ParseError
2169	{
2170	std::string bad_value;
2171	public:
2172	ParseError(const std::string &bad_value_) :bad_value (bad_value_) {}
2173	std::string toString(const std::string &param) const
2174	{
2175	std::ostringstream out;
2176	out << "Invalid value for parameter " << param << ": " << bad_value;
2177	return out.str();
2178	}
2179	};
2180
2181	template <typename T>
2182	T parseOption(const std::string &);
2183
2184	template<>
2185	inline bool parseOption(const std::string & value)
2186	{
2187	if (value == "1" \|\| value == "True" \|\| value == "true" \|\| value == "TRUE")
2188	{
2189	return true;
2190	}
2191	if (value == "0" \|\| value == "False" \|\| value == "false" \|\| value == "FALSE")
2192	{
2193	return false;
2194	}
2195	throw ParseError (value);
2196	}
2197
2198	template<>
2199	inline size_t parseOption(const std::string &value)
2200	{
2201	size_t pos = `0`;
2202	for (; pos < value.size(); pos++)
2203	{
2204	if (!isdigit(value [pos]))
2205	break;
2206	}
2207	cv::String valueStr = value.substr(pos: `0`, n: pos);
2208	cv::String suffixStr = value.substr(pos: pos, n: value.length() - pos);
2209	size_t v = (size_t)std::stoull(str: valueStr);
2210	if (suffixStr.length() == `0`)
2211	return v;
2212	else if (suffixStr == "MB" \|\| suffixStr == "Mb" \|\| suffixStr == "mb")
2213	return v * `1024` * `1024`;
2214	else if (suffixStr == "KB" \|\| suffixStr == "Kb" \|\| suffixStr == "kb")
2215	return v * `1024`;
2216	throw ParseError (value);
2217	}
2218
2219	template<>
2220	inline cv::String parseOption(const std::string &value)
2221	{
2222	return value;
2223	}
2224
2225	template<>
2226	inline utils::Paths parseOption(const std::string &value)
2227	{
2228	utils::Paths result;
2229	#ifdef _WIN32
2230	const char sep = `';'`;
2231	#else
2232	const char sep = `':'`;
2233	#endif
2234	size_t start_pos = `0`;
2235	while (start_pos != std::string::npos)
2236	{
2237	const size_t pos = value.find(c: sep, pos: start_pos);
2238	const std::string one_piece(value, start_pos, pos == std::string::npos ? pos : pos - start_pos);
2239	if (!one_piece.empty())
2240	result.push_back(x: one_piece);
2241	start_pos = pos == std::string::npos ? pos : pos + `1`;
2242	}
2243	return result;
2244	}
2245
2246	static inline const char * envRead(const char * name)
2247	{
2248	#ifdef NO_GETENV
2249	CV_UNUSED(name);
2250	return NULL;
2251	#else
2252	return getenv(name: name);
2253	#endif
2254	}
2255
2256	template<typename T>
2257	inline T read(const std::string & k, const T & defaultValue)
2258	{
2259	try
2260	{
2261	const char * res = envRead(name: k.c_str());
2262	if (res)
2263	return parseOption<T>(std::string (res));
2264	}
2265	catch (const ParseError &err)
2266	{
2267	CV_Error(cv::Error::StsBadArg, err.toString(k));
2268	}
2269	return defaultValue;
2270	}
2271
2272	bool utils::getConfigurationParameterBool(const char* name, bool defaultValue)
2273	{
2274	return read<bool>(k: name, defaultValue);
2275	}
2276
2277	size_t utils::getConfigurationParameterSizeT(const char* name, size_t defaultValue)
2278	{
2279	return read<size_t>(k: name, defaultValue);
2280	}
2281
2282	std::string utils::getConfigurationParameterString(const char* name, const std::string & defaultValue)
2283	{
2284	return read<cv::String>(k: name, defaultValue);
2285	}
2286
2287	utils::Paths utils::getConfigurationParameterPaths(const char* name, const utils::Paths &defaultValue)
2288	{
2289	return read<utils::Paths>(k: name, defaultValue);
2290	}
2291
2292
2293	#ifdef CV_COLLECT_IMPL_DATA
2294	ImplCollector& getImplData()
2295	{
2296	CV_SINGLETON_LAZY_INIT_REF(ImplCollector, new ImplCollector())
2297	}
2298
2299	void setImpl(int flags)
2300	{
2301	cv::AutoLock lock(getImplData().mutex);
2302
2303	getImplData().implFlags = flags;
2304	getImplData().implCode.clear();
2305	getImplData().implFun.clear();
2306	}
2307
2308	void addImpl(int flag, const char* func)
2309	{
2310	cv::AutoLock lock(getImplData().mutex);
2311
2312	getImplData().implFlags \|= flag;
2313	if(func) // use lazy collection if name was not specified
2314	{
2315	size_t index = getImplData().implCode.size();
2316	if(!index \|\| (getImplData().implCode[index-`1`] != flag \|\| getImplData().implFun[index-`1`].compare(func))) // avoid duplicates
2317	{
2318	getImplData().implCode.push_back(flag);
2319	getImplData().implFun.push_back(func);
2320	}
2321	}
2322	}
2323
2324	int getImpl(std::vector<int> &impl, std::vector<String> &funName)
2325	{
2326	cv::AutoLock lock(getImplData().mutex);
2327
2328	impl = getImplData().implCode;
2329	funName = getImplData().implFun;
2330	return getImplData().implFlags; // return actual flags for lazy collection
2331	}
2332
2333	bool useCollection()
2334	{
2335	return getImplData().useCollection;
2336	}
2337
2338	void setUseCollection(bool flag)
2339	{
2340	cv::AutoLock lock(getImplData().mutex);
2341
2342	getImplData().useCollection = flag;
2343	}
2344	#endif
2345
2346	namespace instr
2347	{
2348	bool useInstrumentation()
2349	{
2350	#ifdef ENABLE_INSTRUMENTATION
2351	return getInstrumentStruct().useInstr;
2352	#else
2353	return false;
2354	#endif
2355	}
2356
2357	void setUseInstrumentation(bool flag)
2358	{
2359	#ifdef ENABLE_INSTRUMENTATION
2360	getInstrumentStruct().useInstr = flag;
2361	#else
2362	CV_UNUSED(flag);
2363	#endif
2364	}
2365
2366	InstrNode* getTrace()
2367	{
2368	#ifdef ENABLE_INSTRUMENTATION
2369	return &getInstrumentStruct().rootNode;
2370	#else
2371	return NULL;
2372	#endif
2373	}
2374
2375	void resetTrace()
2376	{
2377	#ifdef ENABLE_INSTRUMENTATION
2378	getInstrumentStruct().rootNode.removeChilds();
2379	getInstrumentTLSStruct().pCurrentNode = &getInstrumentStruct().rootNode;
2380	#endif
2381	}
2382
2383	void setFlags(FLAGS modeFlags)
2384	{
2385	#ifdef ENABLE_INSTRUMENTATION
2386	getInstrumentStruct().flags = modeFlags;
2387	#else
2388	CV_UNUSED(modeFlags);
2389	#endif
2390	}
2391	FLAGS getFlags()
2392	{
2393	#ifdef ENABLE_INSTRUMENTATION
2394	return (FLAGS)getInstrumentStruct().flags;
2395	#else
2396	return (FLAGS)`0`;
2397	#endif
2398	}
2399
2400	NodeData::NodeData(const char* funName, const char* fileName, int lineNum, void* retAddress, bool alwaysExpand, cv::instr::TYPE instrType, cv::instr::IMPL implType)
2401	{
2402	m_funName = funName ? cv::String (funName) : cv::String (); // std::string doesn't accept NULL
2403	m_instrType = instrType;
2404	m_implType = implType;
2405	m_fileName = fileName;
2406	m_lineNum = lineNum;
2407	m_retAddress = retAddress;
2408	m_alwaysExpand = alwaysExpand;
2409
2410	m_threads = `1`;
2411	m_counter = `0`;
2412	m_ticksTotal = `0`;
2413
2414	m_funError = false;
2415	}
2416	NodeData::NodeData(NodeData &ref)
2417	{
2418	*this = ref;
2419	}
2420	NodeData& NodeData::operator=(const NodeData &right)
2421	{
2422	this->m_funName = right.m_funName;
2423	this->m_instrType = right.m_instrType;
2424	this->m_implType = right.m_implType;
2425	this->m_fileName = right.m_fileName;
2426	this->m_lineNum = right.m_lineNum;
2427	this->m_retAddress = right.m_retAddress;
2428	this->m_alwaysExpand = right.m_alwaysExpand;
2429
2430	this->m_threads = right.m_threads;
2431	this->m_counter = right.m_counter;
2432	this->m_ticksTotal = right.m_ticksTotal;
2433
2434	this->m_funError = right.m_funError;
2435
2436	return *this;
2437	}
2438	NodeData::~NodeData()
2439	{
2440	}
2441	bool operator==(const NodeData& left, const NodeData& right)
2442	{
2443	if(left.m_lineNum == right.m_lineNum && left.m_funName == right.m_funName && left.m_fileName == right.m_fileName)
2444	{
2445	if(left.m_retAddress == right.m_retAddress \|\| !(cv::instr::getFlags()&cv::instr::FLAGS_EXPAND_SAME_NAMES \|\| left.m_alwaysExpand))
2446	return true;
2447	}
2448	return false;
2449	}
2450
2451	#ifdef ENABLE_INSTRUMENTATION
2452	InstrStruct& getInstrumentStruct()
2453	{
2454	static InstrStruct instr;
2455	return instr;
2456	}
2457
2458	InstrTLSStruct& getInstrumentTLSStruct()
2459	{
2460	return *getInstrumentStruct().tlsStruct.get();
2461	}
2462
2463	InstrNode* getCurrentNode()
2464	{
2465	return getInstrumentTLSStruct().pCurrentNode;
2466	}
2467
2468	IntrumentationRegion::IntrumentationRegion(const char* funName, const char* fileName, int lineNum, void retAddress, bool* alwaysExpand, TYPE instrType, IMPL implType)
2469	{
2470	m_disabled = false;
2471	m_regionTicks = `0`;
2472
2473	InstrStruct *pStruct = &getInstrumentStruct();
2474	if(pStruct->useInstr)
2475	{
2476	InstrTLSStruct *pTLS = &getInstrumentTLSStruct();
2477
2478	// Disable in case of failure
2479	if(!pTLS->pCurrentNode)
2480	{
2481	m_disabled = true;
2482	return;
2483	}
2484
2485	int depth = pTLS->pCurrentNode->getDepth();
2486	if(pStruct->maxDepth && pStruct->maxDepth <= depth)
2487	{
2488	m_disabled = true;
2489	return;
2490	}
2491
2492	NodeData payload(funName, fileName, lineNum, retAddress, alwaysExpand, instrType, implType);
2493	Node<NodeData>* pChild = NULL;
2494
2495	if(pStruct->flags&FLAGS_MAPPING)
2496	{
2497	// Critical section
2498	cv::AutoLock guard(pStruct->mutexCreate); // Guard from concurrent child creation
2499	pChild = pTLS->pCurrentNode->findChild(payload);
2500	if(!pChild)
2501	{
2502	pChild = new Node<NodeData>(payload);
2503	pTLS->pCurrentNode->addChild(pChild);
2504	}
2505	}
2506	else
2507	{
2508	pChild = pTLS->pCurrentNode->findChild(payload);
2509	if(!pChild)
2510	{
2511	m_disabled = true;
2512	return;
2513	}
2514	}
2515	pTLS->pCurrentNode = pChild;
2516
2517	m_regionTicks = getTickCount();
2518	}
2519	}
2520
2521	IntrumentationRegion::~IntrumentationRegion()
2522	{
2523	InstrStruct *pStruct = &getInstrumentStruct();
2524	if(pStruct->useInstr)
2525	{
2526	if(!m_disabled)
2527	{
2528	InstrTLSStruct *pTLS = &getInstrumentTLSStruct();
2529
2530	if (pTLS->pCurrentNode->m_payload.m_implType == cv::instr::IMPL_OPENCL &&
2531	(pTLS->pCurrentNode->m_payload.m_instrType == cv::instr::TYPE_FUN \|\|
2532	pTLS->pCurrentNode->m_payload.m_instrType == cv::instr::TYPE_WRAPPER))
2533	{
2534	cv::ocl::finish(); // TODO Support "async" OpenCL instrumentation
2535	}
2536
2537	uint64 ticks = (getTickCount() - m_regionTicks);
2538	{
2539	cv::AutoLock guard(pStruct->mutexCount); // Concurrent ticks accumulation
2540	pTLS->pCurrentNode->m_payload.m_counter++;
2541	pTLS->pCurrentNode->m_payload.m_ticksTotal += ticks;
2542	pTLS->pCurrentNode->m_payload.m_tls.get()->m_ticksTotal += ticks;
2543	}
2544
2545	pTLS->pCurrentNode = pTLS->pCurrentNode->m_pParent;
2546	}
2547	}
2548	}
2549	#endif
2550	}
2551
2552	namespace ipp
2553	{
2554
2555	#ifdef HAVE_IPP
2556	struct IPPInitSingleton
2557	{
2558	public:
2559	IPPInitSingleton()
2560	{
2561	useIPP = true;
2562	useIPP_NE = false;
2563	ippStatus = `0`;
2564	funcname = NULL;
2565	filename = NULL;
2566	linen = `0`;
2567	cpuFeatures = `0`;
2568	ippFeatures = `0`;
2569	ippTopFeatures = `0`;
2570	pIppLibInfo = NULL;
2571
2572	ippStatus = ippGetCpuFeatures(pFeaturesMask: &cpuFeatures, NULL);
2573	if(ippStatus < `0`)
2574	{
2575	CV_LOG_ERROR(NULL, "ERROR: IPP cannot detect CPU features, IPP was disabled");
2576	useIPP = false;
2577	return;
2578	}
2579	ippFeatures = cpuFeatures;
2580
2581	std::string env = utils::getConfigurationParameterString(name: "OPENCV_IPP");
2582	if(!env.empty())
2583	{
2584	#if IPP_VERSION_X100 >= 201900
2585	const Ipp64u minorFeatures = ippCPUID_MOVBE\|ippCPUID_AES\|ippCPUID_CLMUL\|ippCPUID_ABR\|ippCPUID_RDRAND\|ippCPUID_F16C\|
2586	ippCPUID_ADCOX\|ippCPUID_RDSEED\|ippCPUID_PREFETCHW\|ippCPUID_SHA\|ippCPUID_MPX\|ippCPUID_AVX512CD\|ippCPUID_AVX512ER\|
2587	ippCPUID_AVX512PF\|ippCPUID_AVX512BW\|ippCPUID_AVX512DQ\|ippCPUID_AVX512VL\|ippCPUID_AVX512VBMI\|ippCPUID_AVX512_4FMADDPS\|
2588	ippCPUID_AVX512_4VNNIW\|ippCPUID_AVX512IFMA;
2589	#elif IPP_VERSION_X100 >= 201703
2590	const Ipp64u minorFeatures = ippCPUID_MOVBE\|ippCPUID_AES\|ippCPUID_CLMUL\|ippCPUID_ABR\|ippCPUID_RDRAND\|ippCPUID_F16C\|
2591	ippCPUID_ADCOX\|ippCPUID_RDSEED\|ippCPUID_PREFETCHW\|ippCPUID_SHA\|ippCPUID_MPX\|ippCPUID_AVX512CD\|ippCPUID_AVX512ER\|
2592	ippCPUID_AVX512PF\|ippCPUID_AVX512BW\|ippCPUID_AVX512DQ\|ippCPUID_AVX512VL\|ippCPUID_AVX512VBMI;
2593	#elif IPP_VERSION_X100 >= 201700
2594	const Ipp64u minorFeatures = ippCPUID_MOVBE\|ippCPUID_AES\|ippCPUID_CLMUL\|ippCPUID_ABR\|ippCPUID_RDRAND\|ippCPUID_F16C\|
2595	ippCPUID_ADCOX\|ippCPUID_RDSEED\|ippCPUID_PREFETCHW\|ippCPUID_SHA\|ippCPUID_AVX512CD\|ippCPUID_AVX512ER\|
2596	ippCPUID_AVX512PF\|ippCPUID_AVX512BW\|ippCPUID_AVX512DQ\|ippCPUID_AVX512VL\|ippCPUID_AVX512VBMI;
2597	#else
2598	const Ipp64u minorFeatures = `0`;
2599	#endif
2600
2601	env = toLowerCase(str: env);
2602	if(env.substr(pos: `0`, n: `2`) == "ne")
2603	{
2604	useIPP_NE = true;
2605	env = env.substr(pos: `3`, n: env.size());
2606	}
2607
2608	if(env == "disabled")
2609	{
2610	CV_LOG_WARNING(NULL, "WARNING: IPP was disabled by OPENCV_IPP environment variable");
2611	useIPP = false;
2612	}
2613	else if(env == "sse42")
2614	ippFeatures = minorFeatures\|ippCPUID_SSE2\|ippCPUID_SSE3\|ippCPUID_SSSE3\|ippCPUID_SSE41\|ippCPUID_SSE42;
2615	else if(env == "avx2")
2616	ippFeatures = minorFeatures\|ippCPUID_SSE2\|ippCPUID_SSE3\|ippCPUID_SSSE3\|ippCPUID_SSE41\|ippCPUID_SSE42\|ippCPUID_AVX\|ippCPUID_AVX2;
2617	#if IPP_VERSION_X100 >= 201700
2618	#if defined (_M_AMD64) \|\| defined (__x86_64__)
2619	else if(env == "avx512")
2620	ippFeatures = minorFeatures\|ippCPUID_SSE2\|ippCPUID_SSE3\|ippCPUID_SSSE3\|ippCPUID_SSE41\|ippCPUID_SSE42\|ippCPUID_AVX\|ippCPUID_AVX2\|ippCPUID_AVX512F;
2621	#endif
2622	#endif
2623	else
2624	CV_LOG_ERROR(NULL, "ERROR: Improper value of OPENCV_IPP: " << env.c_str() << ". Correct values are: disabled, sse42, avx2, avx512 (Intel64 only)");
2625
2626	// Trim unsupported features
2627	ippFeatures &= cpuFeatures;
2628	}
2629
2630	// Disable AVX1 since we don't track regressions for it. SSE42 will be used instead
2631	if(cpuFeatures&ippCPUID_AVX && !(cpuFeatures&ippCPUID_AVX2))
2632	ippFeatures &= ~((Ipp64u)ippCPUID_AVX);
2633
2634	// IPP integrations in OpenCV support only SSE4.2, AVX2 and AVX-512 optimizations.
2635	if(!(
2636	#if IPP_VERSION_X100 >= 201700
2637	cpuFeatures&ippCPUID_AVX512F \|\|
2638	#endif
2639	cpuFeatures&ippCPUID_AVX2 \|\|
2640	cpuFeatures&ippCPUID_SSE42
2641	))
2642	{
2643	useIPP = false;
2644	return;
2645	}
2646
2647	if(ippFeatures == cpuFeatures)
2648	IPP_INITIALIZER(`0`)
2649	else
2650	IPP_INITIALIZER(ippFeatures)
2651	ippFeatures = ippGetEnabledCpuFeatures();
2652
2653	// Detect top level optimizations to make comparison easier for optimizations dependent conditions
2654	#if IPP_VERSION_X100 >= 201700
2655	if(ippFeatures&ippCPUID_AVX512F)
2656	{
2657	if((ippFeatures&ippCPUID_AVX512_SKX) == ippCPUID_AVX512_SKX)
2658	ippTopFeatures = ippCPUID_AVX512_SKX;
2659	else if((ippFeatures&ippCPUID_AVX512_KNL) == ippCPUID_AVX512_KNL)
2660	ippTopFeatures = ippCPUID_AVX512_KNL;
2661	else
2662	ippTopFeatures = ippCPUID_AVX512F; // Unknown AVX512 configuration
2663	}
2664	else
2665	#endif
2666	if(ippFeatures&ippCPUID_AVX2)
2667	ippTopFeatures = ippCPUID_AVX2;
2668	else if(ippFeatures&ippCPUID_SSE42)
2669	ippTopFeatures = ippCPUID_SSE42;
2670
2671	pIppLibInfo = ippiGetLibVersion();
2672
2673	// workaround: https://github.com/opencv/opencv/issues/12959
2674	std::string ippName(pIppLibInfo->Name ? pIppLibInfo->Name : "");
2675	if (ippName.find(s: "SSE4.2") != std::string::npos)
2676	{
2677	ippTopFeatures = ippCPUID_SSE42;
2678	}
2679	}
2680
2681	public:
2682	bool useIPP;
2683	bool useIPP_NE;
2684
2685	int ippStatus; // 0 - all is ok, -1 - IPP functions failed
2686	const char *funcname;
2687	const char *filename;
2688	int linen;
2689	Ipp64u ippFeatures;
2690	Ipp64u cpuFeatures;
2691	Ipp64u ippTopFeatures;
2692	const IppLibraryVersion *pIppLibInfo;
2693	};
2694
2695	static IPPInitSingleton& getIPPSingleton()
2696	{
2697	CV_SINGLETON_LAZY_INIT_REF(IPPInitSingleton, new IPPInitSingleton ())
2698	}
2699	#endif
2700
2701	unsigned long long getIppFeatures()
2702	{
2703	#ifdef HAVE_IPP
2704	return getIPPSingleton().ippFeatures;
2705	#else
2706	return `0`;
2707	#endif
2708	}
2709
2710	#ifdef HAVE_IPP
2711	unsigned long long getIppTopFeatures()
2712	{
2713	return getIPPSingleton().ippTopFeatures;
2714	}
2715	#endif
2716
2717	void setIppStatus(int status, const char * const _funcname, const char * const _filename, int _line)
2718	{
2719	#ifdef HAVE_IPP
2720	getIPPSingleton().ippStatus = status;
2721	getIPPSingleton().funcname = _funcname;
2722	getIPPSingleton().filename = _filename;
2723	getIPPSingleton().linen = _line;
2724	#else
2725	CV_UNUSED(status); CV_UNUSED(_funcname); CV_UNUSED(_filename); CV_UNUSED(_line);
2726	#endif
2727	}
2728
2729	int getIppStatus()
2730	{
2731	#ifdef HAVE_IPP
2732	return getIPPSingleton().ippStatus;
2733	#else
2734	return `0`;
2735	#endif
2736	}
2737
2738	String getIppErrorLocation()
2739	{
2740	#ifdef HAVE_IPP
2741	return format(fmt: "%s:%d %s", getIPPSingleton().filename ? getIPPSingleton().filename : "", getIPPSingleton().linen, getIPPSingleton().funcname ? getIPPSingleton().funcname : "");
2742	#else
2743	return String();
2744	#endif
2745	}
2746
2747	String getIppVersion()
2748	{
2749	#ifdef HAVE_IPP
2750	const IppLibraryVersion *pInfo = getIPPSingleton().pIppLibInfo;
2751	if(pInfo)
2752	return format(fmt: "%s %s %s", pInfo->Name, pInfo->Version, pInfo->BuildDate);
2753	else
2754	return String ("error");
2755	#else
2756	return String("disabled");
2757	#endif
2758	}
2759
2760	bool useIPP()
2761	{
2762	#ifdef HAVE_IPP
2763	CoreTLSData& data = getCoreTlsData();
2764	if (data.useIPP < `0`)
2765	{
2766	data.useIPP = getIPPSingleton().useIPP;
2767	}
2768	return (data.useIPP > `0`);
2769	#else
2770	return false;
2771	#endif
2772	}
2773
2774	void setUseIPP(bool flag)
2775	{
2776	CoreTLSData& data = getCoreTlsData();
2777	#ifdef HAVE_IPP
2778	data.useIPP = (getIPPSingleton().useIPP)?flag:false;
2779	#else
2780	CV_UNUSED(flag);
2781	data.useIPP = false;
2782	#endif
2783	}
2784
2785	bool useIPP_NotExact()
2786	{
2787	#ifdef HAVE_IPP
2788	CoreTLSData& data = getCoreTlsData();
2789	if (data.useIPP_NE < `0`)
2790	{
2791	data.useIPP_NE = getIPPSingleton().useIPP_NE;
2792	}
2793	return (data.useIPP_NE > `0`);
2794	#else
2795	return false;
2796	#endif
2797	}
2798
2799	void setUseIPP_NotExact(bool flag)
2800	{
2801	CoreTLSData& data = getCoreTlsData();
2802	#ifdef HAVE_IPP
2803	data.useIPP_NE = flag;
2804	#else
2805	CV_UNUSED(flag);
2806	data.useIPP_NE = false;
2807	#endif
2808	}
2809
2810	} // namespace ipp
2811
2812
2813	namespace details {
2814
2815	#if OPENCV_IMPL_FP_HINTS_X86
2816	#ifndef _MM_DENORMALS_ZERO_ON // requires pmmintrin.h (SSE3)
2817	#define _MM_DENORMALS_ZERO_ON 0x0040
2818	#endif
2819	#ifndef _MM_DENORMALS_ZERO_MASK // requires pmmintrin.h (SSE3)
2820	#define _MM_DENORMALS_ZERO_MASK 0x0040
2821	#endif
2822	#endif
2823
2824	void setFPDenormalsIgnoreHint(bool ignore, CV_OUT FPDenormalsModeState& state)
2825	{
2826	#if OPENCV_IMPL_FP_HINTS_X86
2827	unsigned mask = _MM_FLUSH_ZERO_MASK;
2828	unsigned value = ignore ? _MM_FLUSH_ZERO_ON : `0`;
2829	if (featuresEnabled.have[CPU_SSE3])
2830	{
2831	mask \|= _MM_DENORMALS_ZERO_MASK;
2832	value \|= ignore ? _MM_DENORMALS_ZERO_ON : `0`;
2833	}
2834	const unsigned old_flags = _mm_getcsr();
2835	const unsigned old_value = old_flags & mask;
2836	unsigned flags = (old_flags & ~mask) \| value;
2837	CV_LOG_DEBUG(NULL, "core: update FP mxcsr flags = " << cv::format("0x%08x", flags));
2838	// save state
2839	state.reserved[`0`] = (uint32_t)mask;
2840	state.reserved[`1`] = (uint32_t)old_value;
2841	_mm_setcsr(i: flags);
2842	#else
2843	CV_UNUSED(ignore); CV_UNUSED(state);
2844	#endif
2845	}
2846
2847	int saveFPDenormalsState(CV_OUT FPDenormalsModeState& state)
2848	{
2849	#if OPENCV_IMPL_FP_HINTS_X86
2850	unsigned mask = _MM_FLUSH_ZERO_MASK;
2851	if (featuresEnabled.have[CPU_SSE3])
2852	{
2853	mask \|= _MM_DENORMALS_ZERO_MASK;
2854	}
2855	const unsigned old_flags = _mm_getcsr();
2856	const unsigned old_value = old_flags & mask;
2857	// save state
2858	state.reserved[`0`] = (uint32_t)mask;
2859	state.reserved[`1`] = (uint32_t)old_value;
2860	return `2`;
2861	#else
2862	CV_UNUSED(state);
2863	return `0`;
2864	#endif
2865	}
2866
2867	bool restoreFPDenormalsState(const FPDenormalsModeState& state)
2868	{
2869	#if OPENCV_IMPL_FP_HINTS_X86
2870	const unsigned mask = (unsigned)state.reserved[`0`];
2871	CV_DbgAssert(mask != `0`); // invalid state (ensure that state is properly saved earlier)
2872	const unsigned value = (unsigned)state.reserved[`1`];
2873	CV_DbgCheck((int)value, value == (value & mask), "invalid SSE FP state");
2874	const unsigned old_flags = _mm_getcsr();
2875	unsigned flags = (old_flags & ~mask) \| value;
2876	CV_LOG_DEBUG(NULL, "core: restore FP mxcsr flags = " << cv::format("0x%08x", flags));
2877	_mm_setcsr(i: flags);
2878	return true;
2879	#else
2880	CV_UNUSED(state);
2881	return false;
2882	#endif
2883	}
2884
2885	} // namespace details
2886
2887	AlgorithmHint getDefaultAlgorithmHint()
2888	{
2889	#ifdef OPENCV_ALGO_HINT_DEFAULT
2890	return OPENCV_ALGO_HINT_DEFAULT;
2891	#else
2892	return ALGO_HINT_ACCURATE;
2893	#endif
2894	};
2895
2896	} // namespace cv
2897
2898	/ End of file. /
2899

source code of opencv/modules/core/src/system.cpp