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1 | #ifndef BOOST_THREAD_PTHREAD_RECURSIVE_MUTEX_HPP |
2 | #define BOOST_THREAD_PTHREAD_RECURSIVE_MUTEX_HPP | |
3 | // (C) Copyright 2007-8 Anthony Williams | |
4 | // (C) Copyright 2011-2012 Vicente J. Botet Escriba | |
5 | // Distributed under the Boost Software License, Version 1.0. (See | |
6 | // accompanying file LICENSE_1_0.txt or copy at | |
7 | // http://www.boost.org/LICENSE_1_0.txt) | |
8 | ||
9 | #include <pthread.h> | |
10 | #include <boost/throw_exception.hpp> | |
11 | #include <boost/thread/exceptions.hpp> | |
12 | #if defined BOOST_THREAD_PROVIDES_NESTED_LOCKS | |
13 | #include <boost/thread/lock_types.hpp> | |
14 | #endif | |
15 | #include <boost/thread/thread_time.hpp> | |
16 | #include <boost/assert.hpp> | |
17 | #ifndef _WIN32 | |
18 | #include <unistd.h> | |
19 | #endif | |
20 | #include <boost/date_time/posix_time/conversion.hpp> | |
21 | #include <errno.h> | |
22 | #include <boost/thread/pthread/timespec.hpp> | |
23 | #include <boost/thread/pthread/pthread_mutex_scoped_lock.hpp> | |
24 | #ifdef BOOST_THREAD_USES_CHRONO | |
25 | #include <boost/chrono/system_clocks.hpp> | |
26 | #include <boost/chrono/ceil.hpp> | |
27 | #endif | |
28 | #include <boost/thread/detail/delete.hpp> | |
29 | ||
30 | #if (defined _POSIX_TIMEOUTS && (_POSIX_TIMEOUTS-0)>=200112L) \ | |
31 | || (defined __ANDROID__ && defined __ANDROID_API__ && __ANDROID_API__ >= 21) | |
32 | #ifndef BOOST_PTHREAD_HAS_TIMEDLOCK | |
33 | #define BOOST_PTHREAD_HAS_TIMEDLOCK | |
34 | #endif | |
35 | #endif | |
36 | ||
37 | #if defined BOOST_HAS_PTHREAD_MUTEXATTR_SETTYPE \ | |
38 | || defined __ANDROID__ | |
39 | #define BOOST_THREAD_HAS_PTHREAD_MUTEXATTR_SETTYPE | |
40 | #endif | |
41 | ||
42 | #if defined BOOST_THREAD_HAS_PTHREAD_MUTEXATTR_SETTYPE && defined BOOST_PTHREAD_HAS_TIMEDLOCK | |
43 | #define BOOST_USE_PTHREAD_RECURSIVE_TIMEDLOCK | |
44 | #endif | |
45 | ||
46 | #include <boost/config/abi_prefix.hpp> | |
47 | ||
48 | namespace boost | |
49 | { | |
50 | class recursive_mutex | |
51 | { | |
52 | private: | |
53 | pthread_mutex_t m; | |
54 | #ifndef BOOST_THREAD_HAS_PTHREAD_MUTEXATTR_SETTYPE | |
55 | pthread_cond_t cond; | |
56 | bool is_locked; | |
57 | pthread_t owner; | |
58 | unsigned count; | |
59 | #endif | |
60 | public: | |
61 | BOOST_THREAD_NO_COPYABLE(recursive_mutex) | |
62 | recursive_mutex() | |
63 | { | |
64 | #ifdef BOOST_THREAD_HAS_PTHREAD_MUTEXATTR_SETTYPE | |
65 | pthread_mutexattr_t attr; | |
66 | ||
67 | int const init_attr_res=pthread_mutexattr_init(&attr); | |
68 | if(init_attr_res) | |
69 | { | |
70 | boost::throw_exception(thread_resource_error(init_attr_res, "boost:: recursive_mutex constructor failed in pthread_mutexattr_init")); | |
71 | } | |
72 | int const set_attr_res=pthread_mutexattr_settype(&attr,PTHREAD_MUTEX_RECURSIVE); | |
73 | if(set_attr_res) | |
74 | { | |
75 | BOOST_VERIFY(!pthread_mutexattr_destroy(&attr)); | |
76 | boost::throw_exception(thread_resource_error(set_attr_res, "boost:: recursive_mutex constructor failed in pthread_mutexattr_settype")); | |
77 | } | |
78 | ||
79 | int const res=pthread_mutex_init(&m,&attr); | |
80 | if(res) | |
81 | { | |
82 | BOOST_VERIFY(!pthread_mutexattr_destroy(&attr)); | |
83 | boost::throw_exception(thread_resource_error(res, "boost:: recursive_mutex constructor failed in pthread_mutex_init")); | |
84 | } | |
85 | BOOST_VERIFY(!pthread_mutexattr_destroy(&attr)); | |
86 | #else | |
87 | int const res=pthread_mutex_init(&m,NULL); | |
88 | if(res) | |
89 | { | |
90 | boost::throw_exception(thread_resource_error(res, "boost:: recursive_mutex constructor failed in pthread_mutex_init")); | |
91 | } | |
92 | int const res2=pthread_cond_init(&cond,NULL); | |
93 | if(res2) | |
94 | { | |
95 | BOOST_VERIFY(!pthread_mutex_destroy(&m)); | |
96 | boost::throw_exception(thread_resource_error(res2, "boost:: recursive_mutex constructor failed in pthread_cond_init")); | |
97 | } | |
98 | is_locked=false; | |
99 | count=0; | |
100 | #endif | |
101 | } | |
102 | ~recursive_mutex() | |
103 | { | |
104 | BOOST_VERIFY(!pthread_mutex_destroy(&m)); | |
105 | #ifndef BOOST_THREAD_HAS_PTHREAD_MUTEXATTR_SETTYPE | |
106 | BOOST_VERIFY(!pthread_cond_destroy(&cond)); | |
107 | #endif | |
108 | } | |
109 | ||
110 | #ifdef BOOST_THREAD_HAS_PTHREAD_MUTEXATTR_SETTYPE | |
111 | void lock() | |
112 | { | |
113 | BOOST_VERIFY(!pthread_mutex_lock(&m)); | |
114 | } | |
115 | ||
116 | void unlock() | |
117 | { | |
118 | BOOST_VERIFY(!pthread_mutex_unlock(&m)); | |
119 | } | |
120 | ||
121 | bool try_lock() BOOST_NOEXCEPT | |
122 | { | |
123 | int const res=pthread_mutex_trylock(&m); | |
124 | BOOST_ASSERT(!res || res==EBUSY); | |
125 | return !res; | |
126 | } | |
127 | #define BOOST_THREAD_DEFINES_RECURSIVE_MUTEX_NATIVE_HANDLE | |
128 | typedef pthread_mutex_t* native_handle_type; | |
129 | native_handle_type native_handle() | |
130 | { | |
131 | return &m; | |
132 | } | |
133 | ||
134 | #else | |
135 | void lock() | |
136 | { | |
137 | boost::pthread::pthread_mutex_scoped_lock const local_lock(&m); | |
138 | if(is_locked && pthread_equal(owner,pthread_self())) | |
139 | { | |
140 | ++count; | |
141 | return; | |
142 | } | |
143 | ||
144 | while(is_locked) | |
145 | { | |
146 | BOOST_VERIFY(!pthread_cond_wait(&cond,&m)); | |
147 | } | |
148 | is_locked=true; | |
149 | ++count; | |
150 | owner=pthread_self(); | |
151 | } | |
152 | ||
153 | void unlock() | |
154 | { | |
155 | boost::pthread::pthread_mutex_scoped_lock const local_lock(&m); | |
156 | if(!--count) | |
157 | { | |
158 | is_locked=false; | |
159 | } | |
160 | BOOST_VERIFY(!pthread_cond_signal(&cond)); | |
161 | } | |
162 | ||
163 | bool try_lock() | |
164 | { | |
165 | boost::pthread::pthread_mutex_scoped_lock const local_lock(&m); | |
166 | if(is_locked && !pthread_equal(owner,pthread_self())) | |
167 | { | |
168 | return false; | |
169 | } | |
170 | is_locked=true; | |
171 | ++count; | |
172 | owner=pthread_self(); | |
173 | return true; | |
174 | } | |
175 | ||
176 | #endif | |
177 | ||
178 | #if defined BOOST_THREAD_PROVIDES_NESTED_LOCKS | |
179 | typedef unique_lock<recursive_mutex> scoped_lock; | |
180 | typedef detail::try_lock_wrapper<recursive_mutex> scoped_try_lock; | |
181 | #endif | |
182 | }; | |
183 | ||
184 | typedef recursive_mutex recursive_try_mutex; | |
185 | ||
186 | class recursive_timed_mutex | |
187 | { | |
188 | private: | |
189 | pthread_mutex_t m; | |
190 | #ifndef BOOST_USE_PTHREAD_RECURSIVE_TIMEDLOCK | |
191 | pthread_cond_t cond; | |
192 | bool is_locked; | |
193 | pthread_t owner; | |
194 | unsigned count; | |
195 | #endif | |
196 | public: | |
197 | BOOST_THREAD_NO_COPYABLE(recursive_timed_mutex) | |
198 | recursive_timed_mutex() | |
199 | { | |
200 | #ifdef BOOST_USE_PTHREAD_RECURSIVE_TIMEDLOCK | |
201 | pthread_mutexattr_t attr; | |
202 | ||
203 | int const init_attr_res=pthread_mutexattr_init(&attr); | |
204 | if(init_attr_res) | |
205 | { | |
206 | boost::throw_exception(thread_resource_error(init_attr_res, "boost:: recursive_timed_mutex constructor failed in pthread_mutexattr_init")); | |
207 | } | |
208 | int const set_attr_res=pthread_mutexattr_settype(&attr,PTHREAD_MUTEX_RECURSIVE); | |
209 | if(set_attr_res) | |
210 | { | |
211 | boost::throw_exception(thread_resource_error(set_attr_res, "boost:: recursive_timed_mutex constructor failed in pthread_mutexattr_settype")); | |
212 | } | |
213 | ||
214 | int const res=pthread_mutex_init(&m,&attr); | |
215 | if(res) | |
216 | { | |
217 | BOOST_VERIFY(!pthread_mutexattr_destroy(&attr)); | |
218 | boost::throw_exception(thread_resource_error(res, "boost:: recursive_timed_mutex constructor failed in pthread_mutex_init")); | |
219 | } | |
220 | BOOST_VERIFY(!pthread_mutexattr_destroy(&attr)); | |
221 | #else | |
222 | int const res=pthread_mutex_init(&m,NULL); | |
223 | if(res) | |
224 | { | |
225 | boost::throw_exception(thread_resource_error(res, "boost:: recursive_timed_mutex constructor failed in pthread_mutex_init")); | |
226 | } | |
227 | int const res2=pthread_cond_init(&cond,NULL); | |
228 | if(res2) | |
229 | { | |
230 | BOOST_VERIFY(!pthread_mutex_destroy(&m)); | |
231 | boost::throw_exception(thread_resource_error(res2, "boost:: recursive_timed_mutex constructor failed in pthread_cond_init")); | |
232 | } | |
233 | is_locked=false; | |
234 | count=0; | |
235 | #endif | |
236 | } | |
237 | ~recursive_timed_mutex() | |
238 | { | |
239 | BOOST_VERIFY(!pthread_mutex_destroy(&m)); | |
240 | #ifndef BOOST_USE_PTHREAD_RECURSIVE_TIMEDLOCK | |
241 | BOOST_VERIFY(!pthread_cond_destroy(&cond)); | |
242 | #endif | |
243 | } | |
244 | ||
245 | #if defined BOOST_THREAD_USES_DATETIME | |
246 | template<typename TimeDuration> | |
247 | bool timed_lock(TimeDuration const & relative_time) | |
248 | { | |
249 | return timed_lock(get_system_time()+relative_time); | |
250 | } | |
251 | #endif | |
252 | ||
253 | #ifdef BOOST_USE_PTHREAD_RECURSIVE_TIMEDLOCK | |
254 | void lock() | |
255 | { | |
256 | BOOST_VERIFY(!pthread_mutex_lock(&m)); | |
257 | } | |
258 | ||
259 | void unlock() | |
260 | { | |
261 | BOOST_VERIFY(!pthread_mutex_unlock(&m)); | |
262 | } | |
263 | ||
264 | bool try_lock() | |
265 | { | |
266 | int const res=pthread_mutex_trylock(&m); | |
267 | BOOST_ASSERT(!res || res==EBUSY); | |
268 | return !res; | |
269 | } | |
270 | private: | |
271 | bool do_try_lock_until(struct timespec const &timeout) | |
272 | { | |
273 | int const res=pthread_mutex_timedlock(&m,&timeout); | |
274 | BOOST_ASSERT(!res || res==ETIMEDOUT); | |
275 | return !res; | |
276 | } | |
277 | ||
278 | public: | |
279 | ||
280 | #else | |
281 | void lock() | |
282 | { | |
283 | boost::pthread::pthread_mutex_scoped_lock const local_lock(&m); | |
284 | if(is_locked && pthread_equal(owner,pthread_self())) | |
285 | { | |
286 | ++count; | |
287 | return; | |
288 | } | |
289 | ||
290 | while(is_locked) | |
291 | { | |
292 | BOOST_VERIFY(!pthread_cond_wait(&cond,&m)); | |
293 | } | |
294 | is_locked=true; | |
295 | ++count; | |
296 | owner=pthread_self(); | |
297 | } | |
298 | ||
299 | void unlock() | |
300 | { | |
301 | boost::pthread::pthread_mutex_scoped_lock const local_lock(&m); | |
302 | if(!--count) | |
303 | { | |
304 | is_locked=false; | |
305 | } | |
306 | BOOST_VERIFY(!pthread_cond_signal(&cond)); | |
307 | } | |
308 | ||
309 | bool try_lock() BOOST_NOEXCEPT | |
310 | { | |
311 | boost::pthread::pthread_mutex_scoped_lock const local_lock(&m); | |
312 | if(is_locked && !pthread_equal(owner,pthread_self())) | |
313 | { | |
314 | return false; | |
315 | } | |
316 | is_locked=true; | |
317 | ++count; | |
318 | owner=pthread_self(); | |
319 | return true; | |
320 | } | |
321 | ||
322 | private: | |
323 | bool do_try_lock_until(struct timespec const &timeout) | |
324 | { | |
325 | boost::pthread::pthread_mutex_scoped_lock const local_lock(&m); | |
326 | if(is_locked && pthread_equal(owner,pthread_self())) | |
327 | { | |
328 | ++count; | |
329 | return true; | |
330 | } | |
331 | while(is_locked) | |
332 | { | |
333 | int const cond_res=pthread_cond_timedwait(&cond,&m,&timeout); | |
334 | if(cond_res==ETIMEDOUT) | |
335 | { | |
336 | return false; | |
337 | } | |
338 | BOOST_ASSERT(!cond_res); | |
339 | } | |
340 | is_locked=true; | |
341 | ++count; | |
342 | owner=pthread_self(); | |
343 | return true; | |
344 | } | |
345 | public: | |
346 | ||
347 | #endif | |
348 | ||
349 | #if defined BOOST_THREAD_USES_DATETIME | |
350 | bool timed_lock(system_time const & abs_time) | |
351 | { | |
352 | struct timespec const ts=detail::to_timespec(abs_time); | |
353 | return do_try_lock_until(ts); | |
354 | } | |
355 | #endif | |
356 | #ifdef BOOST_THREAD_USES_CHRONO | |
357 | template <class Rep, class Period> | |
358 | bool try_lock_for(const chrono::duration<Rep, Period>& rel_time) | |
359 | { | |
360 | return try_lock_until(chrono::steady_clock::now() + rel_time); | |
361 | } | |
362 | template <class Clock, class Duration> | |
363 | bool try_lock_until(const chrono::time_point<Clock, Duration>& t) | |
364 | { | |
365 | using namespace chrono; | |
366 | system_clock::time_point s_now = system_clock::now(); | |
367 | typename Clock::time_point c_now = Clock::now(); | |
368 | return try_lock_until(s_now + ceil<nanoseconds>(t - c_now)); | |
369 | } | |
370 | template <class Duration> | |
371 | bool try_lock_until(const chrono::time_point<chrono::system_clock, Duration>& t) | |
372 | { | |
373 | using namespace chrono; | |
374 | typedef time_point<system_clock, nanoseconds> nano_sys_tmpt; | |
375 | return try_lock_until(nano_sys_tmpt(ceil<nanoseconds>(t.time_since_epoch()))); | |
376 | } | |
377 | bool try_lock_until(const chrono::time_point<chrono::system_clock, chrono::nanoseconds>& tp) | |
378 | { | |
379 | //using namespace chrono; | |
380 | chrono::nanoseconds d = tp.time_since_epoch(); | |
381 | timespec ts = boost::detail::to_timespec(d); | |
382 | return do_try_lock_until(ts); | |
383 | } | |
384 | #endif | |
385 | ||
386 | #define BOOST_THREAD_DEFINES_RECURSIVE_TIMED_MUTEX_NATIVE_HANDLE | |
387 | typedef pthread_mutex_t* native_handle_type; | |
388 | native_handle_type native_handle() | |
389 | { | |
390 | return &m; | |
391 | } | |
392 | ||
393 | #if defined BOOST_THREAD_PROVIDES_NESTED_LOCKS | |
394 | typedef unique_lock<recursive_timed_mutex> scoped_timed_lock; | |
395 | typedef detail::try_lock_wrapper<recursive_timed_mutex> scoped_try_lock; | |
396 | typedef scoped_timed_lock scoped_lock; | |
397 | #endif | |
398 | }; | |
399 | ||
400 | } | |
401 | ||
402 | #include <boost/config/abi_suffix.hpp> | |
403 | ||
404 | #endif |