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 |
405 | |