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1 | // -*- C++ -*- |
---|---|
2 | //===----------------------------------------------------------------------===// |
3 | // |
4 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
5 | // See https://llvm.org/LICENSE.txt for license information. |
6 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
7 | // |
8 | //===----------------------------------------------------------------------===// |
9 | |
10 | #ifndef _LIBCPP___CXX03___THREAD_SUPPORT_C11_H |
11 | #define _LIBCPP___CXX03___THREAD_SUPPORT_C11_H |
12 | |
13 | #include <__cxx03/__chrono/convert_to_timespec.h> |
14 | #include <__cxx03/__chrono/duration.h> |
15 | #include <__cxx03/__config> |
16 | #include <__cxx03/ctime> |
17 | #include <__cxx03/errno.h> |
18 | #include <__cxx03/threads.h> |
19 | |
20 | #ifndef _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER |
21 | # pragma GCC system_header |
22 | #endif |
23 | |
24 | _LIBCPP_BEGIN_NAMESPACE_STD |
25 | |
26 | using __libcpp_timespec_t = ::timespec; |
27 | |
28 | // |
29 | // Mutex |
30 | // |
31 | typedef mtx_t __libcpp_mutex_t; |
32 | // mtx_t is a struct so using {} for initialization is valid. |
33 | #define _LIBCPP_MUTEX_INITIALIZER \ |
34 | {} |
35 | |
36 | typedef mtx_t __libcpp_recursive_mutex_t; |
37 | |
38 | inline _LIBCPP_HIDE_FROM_ABI int __libcpp_recursive_mutex_init(__libcpp_recursive_mutex_t* __m) { |
39 | return mtx_init(__m, mtx_plain | mtx_recursive) == thrd_success ? 0 : EINVAL; |
40 | } |
41 | |
42 | inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_NO_THREAD_SAFETY_ANALYSIS int |
43 | __libcpp_recursive_mutex_lock(__libcpp_recursive_mutex_t* __m) { |
44 | return mtx_lock(__m) == thrd_success ? 0 : EINVAL; |
45 | } |
46 | |
47 | inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_NO_THREAD_SAFETY_ANALYSIS bool |
48 | __libcpp_recursive_mutex_trylock(__libcpp_recursive_mutex_t* __m) { |
49 | return mtx_trylock(__m) == thrd_success; |
50 | } |
51 | |
52 | inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_NO_THREAD_SAFETY_ANALYSIS int |
53 | __libcpp_recursive_mutex_unlock(__libcpp_recursive_mutex_t* __m) { |
54 | return mtx_unlock(__m) == thrd_success ? 0 : EINVAL; |
55 | } |
56 | |
57 | inline _LIBCPP_HIDE_FROM_ABI int __libcpp_recursive_mutex_destroy(__libcpp_recursive_mutex_t* __m) { |
58 | mtx_destroy(__m); |
59 | return 0; |
60 | } |
61 | |
62 | inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_NO_THREAD_SAFETY_ANALYSIS int __libcpp_mutex_lock(__libcpp_mutex_t* __m) { |
63 | return mtx_lock(__m) == thrd_success ? 0 : EINVAL; |
64 | } |
65 | |
66 | inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_NO_THREAD_SAFETY_ANALYSIS bool __libcpp_mutex_trylock(__libcpp_mutex_t* __m) { |
67 | return mtx_trylock(__m) == thrd_success; |
68 | } |
69 | |
70 | inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_NO_THREAD_SAFETY_ANALYSIS int __libcpp_mutex_unlock(__libcpp_mutex_t* __m) { |
71 | return mtx_unlock(__m) == thrd_success ? 0 : EINVAL; |
72 | } |
73 | |
74 | inline _LIBCPP_HIDE_FROM_ABI int __libcpp_mutex_destroy(__libcpp_mutex_t* __m) { |
75 | mtx_destroy(__m); |
76 | return 0; |
77 | } |
78 | |
79 | // |
80 | // Condition Variable |
81 | // |
82 | typedef cnd_t __libcpp_condvar_t; |
83 | // cnd_t is a struct so using {} for initialization is valid. |
84 | #define _LIBCPP_CONDVAR_INITIALIZER \ |
85 | {} |
86 | |
87 | inline _LIBCPP_HIDE_FROM_ABI int __libcpp_condvar_signal(__libcpp_condvar_t* __cv) { |
88 | return cnd_signal(__cv) == thrd_success ? 0 : EINVAL; |
89 | } |
90 | |
91 | inline _LIBCPP_HIDE_FROM_ABI int __libcpp_condvar_broadcast(__libcpp_condvar_t* __cv) { |
92 | return cnd_broadcast(__cv) == thrd_success ? 0 : EINVAL; |
93 | } |
94 | |
95 | inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_NO_THREAD_SAFETY_ANALYSIS int |
96 | __libcpp_condvar_wait(__libcpp_condvar_t* __cv, __libcpp_mutex_t* __m) { |
97 | return cnd_wait(__cv, __m) == thrd_success ? 0 : EINVAL; |
98 | } |
99 | |
100 | inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_NO_THREAD_SAFETY_ANALYSIS int |
101 | __libcpp_condvar_timedwait(__libcpp_condvar_t* __cv, __libcpp_mutex_t* __m, timespec* __ts) { |
102 | int __ec = cnd_timedwait(__cv, __m, __ts); |
103 | return __ec == thrd_timedout ? ETIMEDOUT : __ec; |
104 | } |
105 | |
106 | inline _LIBCPP_HIDE_FROM_ABI int __libcpp_condvar_destroy(__libcpp_condvar_t* __cv) { |
107 | cnd_destroy(__cv); |
108 | return 0; |
109 | } |
110 | |
111 | // |
112 | // Execute once |
113 | // |
114 | typedef ::once_flag __libcpp_exec_once_flag; |
115 | #define _LIBCPP_EXEC_ONCE_INITIALIZER ONCE_FLAG_INIT |
116 | |
117 | inline _LIBCPP_HIDE_FROM_ABI int __libcpp_execute_once(__libcpp_exec_once_flag* flag, void (*init_routine)(void)) { |
118 | ::call_once(flag, init_routine); |
119 | return 0; |
120 | } |
121 | |
122 | // |
123 | // Thread id |
124 | // |
125 | typedef thrd_t __libcpp_thread_id; |
126 | |
127 | // Returns non-zero if the thread ids are equal, otherwise 0 |
128 | inline _LIBCPP_HIDE_FROM_ABI bool __libcpp_thread_id_equal(__libcpp_thread_id t1, __libcpp_thread_id t2) { |
129 | return thrd_equal(t1, t2) != 0; |
130 | } |
131 | |
132 | // Returns non-zero if t1 < t2, otherwise 0 |
133 | inline _LIBCPP_HIDE_FROM_ABI bool __libcpp_thread_id_less(__libcpp_thread_id t1, __libcpp_thread_id t2) { |
134 | return t1 < t2; |
135 | } |
136 | |
137 | // |
138 | // Thread |
139 | // |
140 | #define _LIBCPP_NULL_THREAD 0U |
141 | |
142 | typedef thrd_t __libcpp_thread_t; |
143 | |
144 | inline _LIBCPP_HIDE_FROM_ABI __libcpp_thread_id __libcpp_thread_get_id(const __libcpp_thread_t* __t) { return *__t; } |
145 | |
146 | inline _LIBCPP_HIDE_FROM_ABI bool __libcpp_thread_isnull(const __libcpp_thread_t* __t) { |
147 | return __libcpp_thread_get_id(__t) == 0; |
148 | } |
149 | |
150 | inline _LIBCPP_HIDE_FROM_ABI int __libcpp_thread_create(__libcpp_thread_t* __t, void* (*__func)(void*), void* __arg) { |
151 | int __ec = thrd_create(__t, reinterpret_cast<thrd_start_t>(__func), __arg); |
152 | return __ec == thrd_nomem ? ENOMEM : __ec; |
153 | } |
154 | |
155 | inline _LIBCPP_HIDE_FROM_ABI __libcpp_thread_id __libcpp_thread_get_current_id() { return thrd_current(); } |
156 | |
157 | inline _LIBCPP_HIDE_FROM_ABI int __libcpp_thread_join(__libcpp_thread_t* __t) { |
158 | return thrd_join(*__t, nullptr) == thrd_success ? 0 : EINVAL; |
159 | } |
160 | |
161 | inline _LIBCPP_HIDE_FROM_ABI int __libcpp_thread_detach(__libcpp_thread_t* __t) { |
162 | return thrd_detach(*__t) == thrd_success ? 0 : EINVAL; |
163 | } |
164 | |
165 | inline _LIBCPP_HIDE_FROM_ABI void __libcpp_thread_yield() { thrd_yield(); } |
166 | |
167 | inline _LIBCPP_HIDE_FROM_ABI void __libcpp_thread_sleep_for(const chrono::nanoseconds& __ns) { |
168 | __libcpp_timespec_t __ts = std::__convert_to_timespec<__libcpp_timespec_t>(__ns); |
169 | thrd_sleep(&__ts, nullptr); |
170 | } |
171 | |
172 | // |
173 | // Thread local storage |
174 | // |
175 | #define _LIBCPP_TLS_DESTRUCTOR_CC /* nothing */ |
176 | |
177 | typedef tss_t __libcpp_tls_key; |
178 | |
179 | inline _LIBCPP_HIDE_FROM_ABI int __libcpp_tls_create(__libcpp_tls_key* __key, void (*__at_exit)(void*)) { |
180 | return tss_create(__key, __at_exit) == thrd_success ? 0 : EINVAL; |
181 | } |
182 | |
183 | inline _LIBCPP_HIDE_FROM_ABI void* __libcpp_tls_get(__libcpp_tls_key __key) { return tss_get(__key); } |
184 | |
185 | inline _LIBCPP_HIDE_FROM_ABI int __libcpp_tls_set(__libcpp_tls_key __key, void* __p) { |
186 | return tss_set(__key, __p) == thrd_success ? 0 : EINVAL; |
187 | } |
188 | |
189 | _LIBCPP_END_NAMESPACE_STD |
190 | |
191 | #endif // _LIBCPP___CXX03___THREAD_SUPPORT_C11_H |
192 |
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