1 | //Copyright (c) 2006-2009 Emil Dotchevski and Reverge Studios, Inc. |
2 | |
3 | //Distributed under the Boost Software License, Version 1.0. (See accompanying |
4 | //file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
5 | |
6 | #ifndef BOOST_EXCEPTION_274DA366004E11DCB1DDFE2E56D89593 |
7 | #define BOOST_EXCEPTION_274DA366004E11DCB1DDFE2E56D89593 |
8 | |
9 | #include <boost/config.hpp> |
10 | |
11 | #ifdef BOOST_EXCEPTION_MINI_BOOST |
12 | #include <memory> |
13 | namespace boost { namespace exception_detail { using std::shared_ptr; } } |
14 | #else |
15 | namespace boost { template <class T> class shared_ptr; } |
16 | namespace boost { namespace exception_detail { using boost::shared_ptr; } } |
17 | #endif |
18 | |
19 | #if !defined(BOOST_EXCEPTION_ENABLE_WARNINGS) |
20 | #if __GNUC__*100+__GNUC_MINOR__>301 |
21 | #pragma GCC system_header |
22 | #endif |
23 | #ifdef __clang__ |
24 | #pragma clang system_header |
25 | #endif |
26 | #ifdef _MSC_VER |
27 | #pragma warning(push,1) |
28 | #pragma warning(disable: 4265) |
29 | #endif |
30 | #endif |
31 | |
32 | namespace |
33 | boost |
34 | { |
35 | namespace |
36 | exception_detail |
37 | { |
38 | template <class T> |
39 | class |
40 | refcount_ptr |
41 | { |
42 | public: |
43 | |
44 | refcount_ptr(): |
45 | px_(0) |
46 | { |
47 | } |
48 | |
49 | ~refcount_ptr() |
50 | { |
51 | release(); |
52 | } |
53 | |
54 | refcount_ptr( refcount_ptr const & x ): |
55 | px_(x.px_) |
56 | { |
57 | add_ref(); |
58 | } |
59 | |
60 | refcount_ptr & |
61 | operator=( refcount_ptr const & x ) |
62 | { |
63 | adopt(px: x.px_); |
64 | return *this; |
65 | } |
66 | |
67 | void |
68 | adopt( T * px ) |
69 | { |
70 | release(); |
71 | px_=px; |
72 | add_ref(); |
73 | } |
74 | |
75 | T * |
76 | get() const |
77 | { |
78 | return px_; |
79 | } |
80 | |
81 | private: |
82 | |
83 | T * px_; |
84 | |
85 | void |
86 | add_ref() |
87 | { |
88 | if( px_ ) |
89 | px_->add_ref(); |
90 | } |
91 | |
92 | void |
93 | release() |
94 | { |
95 | if( px_ && px_->release() ) |
96 | px_=0; |
97 | } |
98 | }; |
99 | } |
100 | |
101 | //////////////////////////////////////////////////////////////////////// |
102 | |
103 | template <class Tag,class T> |
104 | class error_info; |
105 | |
106 | typedef error_info<struct throw_function_,char const *> throw_function; |
107 | typedef error_info<struct throw_file_,char const *> throw_file; |
108 | typedef error_info<struct throw_line_,int> throw_line; |
109 | |
110 | template <> |
111 | class |
112 | error_info<throw_function_,char const *> |
113 | { |
114 | public: |
115 | typedef char const * value_type; |
116 | value_type v_; |
117 | explicit |
118 | error_info( value_type v ): |
119 | v_(v) |
120 | { |
121 | } |
122 | }; |
123 | |
124 | template <> |
125 | class |
126 | error_info<throw_file_,char const *> |
127 | { |
128 | public: |
129 | typedef char const * value_type; |
130 | value_type v_; |
131 | explicit |
132 | error_info( value_type v ): |
133 | v_(v) |
134 | { |
135 | } |
136 | }; |
137 | |
138 | template <> |
139 | class |
140 | error_info<throw_line_,int> |
141 | { |
142 | public: |
143 | typedef int value_type; |
144 | value_type v_; |
145 | explicit |
146 | error_info( value_type v ): |
147 | v_(v) |
148 | { |
149 | } |
150 | }; |
151 | |
152 | class |
153 | BOOST_SYMBOL_VISIBLE |
154 | exception; |
155 | |
156 | namespace |
157 | exception_detail |
158 | { |
159 | class error_info_base; |
160 | struct type_info_; |
161 | |
162 | struct |
163 | error_info_container |
164 | { |
165 | virtual char const * diagnostic_information( char const * ) const = 0; |
166 | virtual shared_ptr<error_info_base> get( type_info_ const & ) const = 0; |
167 | virtual void set( shared_ptr<error_info_base> const &, type_info_ const & ) = 0; |
168 | virtual void add_ref() const = 0; |
169 | virtual bool release() const = 0; |
170 | virtual refcount_ptr<exception_detail::error_info_container> clone() const = 0; |
171 | |
172 | protected: |
173 | |
174 | ~error_info_container() BOOST_NOEXCEPT_OR_NOTHROW |
175 | { |
176 | } |
177 | }; |
178 | |
179 | template <class> |
180 | struct get_info; |
181 | |
182 | template <> |
183 | struct get_info<throw_function>; |
184 | |
185 | template <> |
186 | struct get_info<throw_file>; |
187 | |
188 | template <> |
189 | struct get_info<throw_line>; |
190 | |
191 | template <class> |
192 | struct set_info_rv; |
193 | |
194 | template <> |
195 | struct set_info_rv<throw_function>; |
196 | |
197 | template <> |
198 | struct set_info_rv<throw_file>; |
199 | |
200 | template <> |
201 | struct set_info_rv<throw_line>; |
202 | |
203 | char const * get_diagnostic_information( exception const &, char const * ); |
204 | |
205 | void copy_boost_exception( exception *, exception const * ); |
206 | |
207 | template <class E,class Tag,class T> |
208 | E const & set_info( E const &, error_info<Tag,T> const & ); |
209 | |
210 | template <class E> |
211 | E const & set_info( E const &, throw_function const & ); |
212 | |
213 | template <class E> |
214 | E const & set_info( E const &, throw_file const & ); |
215 | |
216 | template <class E> |
217 | E const & set_info( E const &, throw_line const & ); |
218 | } |
219 | |
220 | class |
221 | BOOST_SYMBOL_VISIBLE |
222 | exception |
223 | { |
224 | //<N3757> |
225 | public: |
226 | template <class Tag> void set( typename Tag::type const & ); |
227 | template <class Tag> typename Tag::type const * get() const; |
228 | //</N3757> |
229 | |
230 | protected: |
231 | |
232 | exception(): |
233 | throw_function_(0), |
234 | throw_file_(0), |
235 | throw_line_(-1) |
236 | { |
237 | } |
238 | |
239 | #ifdef __HP_aCC |
240 | //On HP aCC, this protected copy constructor prevents throwing boost::exception. |
241 | //On all other platforms, the same effect is achieved by the pure virtual destructor. |
242 | exception( exception const & x ) BOOST_NOEXCEPT_OR_NOTHROW: |
243 | data_(x.data_), |
244 | throw_function_(x.throw_function_), |
245 | throw_file_(x.throw_file_), |
246 | throw_line_(x.throw_line_) |
247 | { |
248 | } |
249 | #endif |
250 | |
251 | virtual ~exception() BOOST_NOEXCEPT_OR_NOTHROW |
252 | #ifndef __HP_aCC |
253 | = 0 //Workaround for HP aCC, =0 incorrectly leads to link errors. |
254 | #endif |
255 | ; |
256 | |
257 | #if (defined(__MWERKS__) && __MWERKS__<=0x3207) || (defined(_MSC_VER) && _MSC_VER<=1310) |
258 | public: |
259 | #else |
260 | private: |
261 | |
262 | template <class E> |
263 | friend E const & exception_detail::set_info( E const &, throw_function const & ); |
264 | |
265 | template <class E> |
266 | friend E const & exception_detail::set_info( E const &, throw_file const & ); |
267 | |
268 | template <class E> |
269 | friend E const & exception_detail::set_info( E const &, throw_line const & ); |
270 | |
271 | template <class E,class Tag,class T> |
272 | friend E const & exception_detail::set_info( E const &, error_info<Tag,T> const & ); |
273 | |
274 | friend char const * exception_detail::get_diagnostic_information( exception const &, char const * ); |
275 | |
276 | template <class> |
277 | friend struct exception_detail::get_info; |
278 | friend struct exception_detail::get_info<throw_function>; |
279 | friend struct exception_detail::get_info<throw_file>; |
280 | friend struct exception_detail::get_info<throw_line>; |
281 | template <class> |
282 | friend struct exception_detail::set_info_rv; |
283 | friend struct exception_detail::set_info_rv<throw_function>; |
284 | friend struct exception_detail::set_info_rv<throw_file>; |
285 | friend struct exception_detail::set_info_rv<throw_line>; |
286 | friend void exception_detail::copy_boost_exception( exception *, exception const * ); |
287 | #endif |
288 | mutable exception_detail::refcount_ptr<exception_detail::error_info_container> data_; |
289 | mutable char const * throw_function_; |
290 | mutable char const * throw_file_; |
291 | mutable int throw_line_; |
292 | }; |
293 | |
294 | inline |
295 | exception:: |
296 | ~exception() BOOST_NOEXCEPT_OR_NOTHROW |
297 | { |
298 | } |
299 | |
300 | namespace |
301 | exception_detail |
302 | { |
303 | template <class E> |
304 | E const & |
305 | set_info( E const & x, throw_function const & y ) |
306 | { |
307 | x.throw_function_=y.v_; |
308 | return x; |
309 | } |
310 | |
311 | template <class E> |
312 | E const & |
313 | set_info( E const & x, throw_file const & y ) |
314 | { |
315 | x.throw_file_=y.v_; |
316 | return x; |
317 | } |
318 | |
319 | template <class E> |
320 | E const & |
321 | set_info( E const & x, throw_line const & y ) |
322 | { |
323 | x.throw_line_=y.v_; |
324 | return x; |
325 | } |
326 | } |
327 | |
328 | //////////////////////////////////////////////////////////////////////// |
329 | |
330 | namespace |
331 | exception_detail |
332 | { |
333 | template <class T> |
334 | struct |
335 | BOOST_SYMBOL_VISIBLE |
336 | error_info_injector: |
337 | public T, |
338 | public exception |
339 | { |
340 | explicit |
341 | error_info_injector( T const & x ): |
342 | T(x) |
343 | { |
344 | } |
345 | |
346 | ~error_info_injector() BOOST_NOEXCEPT_OR_NOTHROW |
347 | { |
348 | } |
349 | }; |
350 | |
351 | struct large_size { char c[256]; }; |
352 | large_size dispatch_boost_exception( exception const * ); |
353 | |
354 | struct small_size { }; |
355 | small_size dispatch_boost_exception( void const * ); |
356 | |
357 | template <class,int> |
358 | struct enable_error_info_helper; |
359 | |
360 | template <class T> |
361 | struct |
362 | enable_error_info_helper<T,sizeof(large_size)> |
363 | { |
364 | typedef T type; |
365 | }; |
366 | |
367 | template <class T> |
368 | struct |
369 | enable_error_info_helper<T,sizeof(small_size)> |
370 | { |
371 | typedef error_info_injector<T> type; |
372 | }; |
373 | |
374 | template <class T> |
375 | struct |
376 | enable_error_info_return_type |
377 | { |
378 | typedef typename enable_error_info_helper<T,sizeof(exception_detail::dispatch_boost_exception(static_cast<T *>(0)))>::type type; |
379 | }; |
380 | } |
381 | |
382 | template <class T> |
383 | inline |
384 | typename |
385 | exception_detail::enable_error_info_return_type<T>::type |
386 | enable_error_info( T const & x ) |
387 | { |
388 | typedef typename exception_detail::enable_error_info_return_type<T>::type rt; |
389 | return rt(x); |
390 | } |
391 | |
392 | //////////////////////////////////////////////////////////////////////// |
393 | |
394 | namespace |
395 | exception_detail |
396 | { |
397 | class |
398 | BOOST_SYMBOL_VISIBLE |
399 | clone_base |
400 | { |
401 | public: |
402 | |
403 | virtual clone_base const * clone() const = 0; |
404 | virtual void rethrow() const = 0; |
405 | |
406 | virtual |
407 | ~clone_base() BOOST_NOEXCEPT_OR_NOTHROW |
408 | { |
409 | } |
410 | }; |
411 | |
412 | inline |
413 | void |
414 | copy_boost_exception( exception * a, exception const * b ) |
415 | { |
416 | refcount_ptr<error_info_container> data; |
417 | if( error_info_container * d=b->data_.get() ) |
418 | data = d->clone(); |
419 | a->throw_file_ = b->throw_file_; |
420 | a->throw_line_ = b->throw_line_; |
421 | a->throw_function_ = b->throw_function_; |
422 | a->data_ = data; |
423 | } |
424 | |
425 | inline |
426 | void |
427 | copy_boost_exception( void *, void const * ) |
428 | { |
429 | } |
430 | |
431 | template <class T> |
432 | class |
433 | BOOST_SYMBOL_VISIBLE |
434 | clone_impl: |
435 | public T, |
436 | public virtual clone_base |
437 | { |
438 | struct clone_tag { }; |
439 | clone_impl( clone_impl const & x, clone_tag ): |
440 | T(x) |
441 | { |
442 | copy_boost_exception(this,&x); |
443 | } |
444 | |
445 | public: |
446 | |
447 | explicit |
448 | clone_impl( T const & x ): |
449 | T(x) |
450 | { |
451 | copy_boost_exception(this,&x); |
452 | } |
453 | |
454 | ~clone_impl() BOOST_NOEXCEPT_OR_NOTHROW |
455 | { |
456 | } |
457 | |
458 | private: |
459 | |
460 | clone_base const * |
461 | clone() const |
462 | { |
463 | return new clone_impl(*this,clone_tag()); |
464 | } |
465 | |
466 | void |
467 | rethrow() const |
468 | { |
469 | throw*this; |
470 | } |
471 | }; |
472 | } |
473 | |
474 | template <class T> |
475 | inline |
476 | exception_detail::clone_impl<T> |
477 | enable_current_exception( T const & x ) |
478 | { |
479 | return exception_detail::clone_impl<T>(x); |
480 | } |
481 | } |
482 | |
483 | #if defined(_MSC_VER) && !defined(BOOST_EXCEPTION_ENABLE_WARNINGS) |
484 | #pragma warning(pop) |
485 | #endif |
486 | |
487 | #endif // #ifndef BOOST_EXCEPTION_274DA366004E11DCB1DDFE2E56D89593 |
488 | |