1 | #ifndef BOOST_THREAD_CONDITION_VARIABLE_STEADY_PTHREAD_HPP
|
---|
2 | #define BOOST_THREAD_CONDITION_VARIABLE_STEADY_PTHREAD_HPP
|
---|
3 |
|
---|
4 | // Distributed under the Boost Software License, Version 1.0. (See
|
---|
5 | // accompanying file LICENSE_1_0.txt or copy at
|
---|
6 | // http://www.boost.org/LICENSE_1_0.txt)
|
---|
7 | // (C) Copyright 2007-10 Anthony Williams
|
---|
8 | // (C) Copyright 2011-2012 Vicente J. Botet Escriba
|
---|
9 | // Steady clock modifications by David Bacher
|
---|
10 |
|
---|
11 | #include <pthread.h>
|
---|
12 | #include <boost/thread/pthread/condition_variable.hpp>
|
---|
13 |
|
---|
14 | namespace boost
|
---|
15 | {
|
---|
16 |
|
---|
17 | class condition_variable_steady
|
---|
18 | {
|
---|
19 | private:
|
---|
20 | #if defined BOOST_THREAD_PROVIDES_INTERRUPTIONS
|
---|
21 | pthread_mutex_t internal_mutex;
|
---|
22 | #endif
|
---|
23 | pthread_cond_t cond;
|
---|
24 |
|
---|
25 | public:
|
---|
26 | //private: // used by boost::thread::try_join_until
|
---|
27 |
|
---|
28 | inline bool do_wait_until(
|
---|
29 | unique_lock<mutex>& lock,
|
---|
30 | struct timespec const &timeout);
|
---|
31 |
|
---|
32 | bool do_wait_for(
|
---|
33 | unique_lock<mutex>& lock,
|
---|
34 | struct timespec const &timeout)
|
---|
35 | {
|
---|
36 | return do_wait_until(lock, boost::detail::timespec_plus(timeout, boost::detail::timespec_now()));
|
---|
37 | }
|
---|
38 |
|
---|
39 | public:
|
---|
40 | BOOST_THREAD_NO_COPYABLE(condition_variable_steady)
|
---|
41 | condition_variable_steady()
|
---|
42 | {
|
---|
43 | #if defined BOOST_THREAD_PROVIDES_INTERRUPTIONS
|
---|
44 | int const res=pthread_mutex_init(&internal_mutex,NULL);
|
---|
45 | if(res)
|
---|
46 | {
|
---|
47 | boost::throw_exception(thread_resource_error(res, "boost::condition_variable_steady::condition_variable_steady() constructor failed in pthread_mutex_init"));
|
---|
48 | }
|
---|
49 | #endif
|
---|
50 |
|
---|
51 | pthread_condattr_t attr;
|
---|
52 | int const res2 = pthread_condattr_init(&attr);
|
---|
53 | if(res2)
|
---|
54 | {
|
---|
55 | #if defined BOOST_THREAD_PROVIDES_INTERRUPTIONS
|
---|
56 | BOOST_VERIFY(!pthread_mutex_destroy(&internal_mutex));
|
---|
57 | #endif
|
---|
58 | boost::throw_exception(thread_resource_error(res2, "boost::condition_variable_steady::condition_variable_steady() constructor failed in pthread_condattr_init"));
|
---|
59 | }
|
---|
60 | pthread_condattr_setclock(&attr, CLOCK_MONOTONIC);
|
---|
61 | int const res3=pthread_cond_init(&cond,&attr);
|
---|
62 | pthread_condattr_destroy(&attr);
|
---|
63 | if(res3)
|
---|
64 | {
|
---|
65 | #if defined BOOST_THREAD_PROVIDES_INTERRUPTIONS
|
---|
66 | BOOST_VERIFY(!pthread_mutex_destroy(&internal_mutex));
|
---|
67 | #endif
|
---|
68 | boost::throw_exception(thread_resource_error(res3, "boost::condition_variable_steady::condition_variable_steady() constructor failed in pthread_cond_init"));
|
---|
69 | }
|
---|
70 |
|
---|
71 | }
|
---|
72 | ~condition_variable_steady()
|
---|
73 | {
|
---|
74 | int ret;
|
---|
75 | #if defined BOOST_THREAD_PROVIDES_INTERRUPTIONS
|
---|
76 | do {
|
---|
77 | ret = pthread_mutex_destroy(&internal_mutex);
|
---|
78 | } while (ret == EINTR);
|
---|
79 | BOOST_ASSERT(!ret);
|
---|
80 | #endif
|
---|
81 | do {
|
---|
82 | ret = pthread_cond_destroy(&cond);
|
---|
83 | } while (ret == EINTR);
|
---|
84 | BOOST_ASSERT(!ret);
|
---|
85 | }
|
---|
86 |
|
---|
87 | void wait(unique_lock<mutex>& m);
|
---|
88 |
|
---|
89 | template<typename predicate_type>
|
---|
90 | void wait(unique_lock<mutex>& m,predicate_type pred)
|
---|
91 | {
|
---|
92 | while(!pred()) wait(m);
|
---|
93 | }
|
---|
94 |
|
---|
95 | #ifdef BOOST_THREAD_USES_CHRONO
|
---|
96 |
|
---|
97 | template <class Duration>
|
---|
98 | cv_status
|
---|
99 | wait_until(
|
---|
100 | unique_lock<mutex>& lock,
|
---|
101 | const chrono::time_point<chrono::steady_clock, Duration>& t)
|
---|
102 | {
|
---|
103 | using namespace chrono;
|
---|
104 | typedef time_point<steady_clock, nanoseconds> nano_sys_tmpt;
|
---|
105 | wait_until(lock,
|
---|
106 | nano_sys_tmpt(ceil<nanoseconds>(t.time_since_epoch())));
|
---|
107 | return steady_clock::now() < t ? cv_status::no_timeout :
|
---|
108 | cv_status::timeout;
|
---|
109 | }
|
---|
110 |
|
---|
111 | template <class Clock, class Duration>
|
---|
112 | cv_status
|
---|
113 | wait_until(
|
---|
114 | unique_lock<mutex>& lock,
|
---|
115 | const chrono::time_point<Clock, Duration>& t)
|
---|
116 | {
|
---|
117 | using namespace chrono;
|
---|
118 | steady_clock::time_point s_now = steady_clock::now();
|
---|
119 | typename Clock::time_point c_now = Clock::now();
|
---|
120 | wait_until(lock, s_now + ceil<nanoseconds>(t - c_now));
|
---|
121 | return Clock::now() < t ? cv_status::no_timeout : cv_status::timeout;
|
---|
122 | }
|
---|
123 |
|
---|
124 | template <class Clock, class Duration, class Predicate>
|
---|
125 | bool
|
---|
126 | wait_until(
|
---|
127 | unique_lock<mutex>& lock,
|
---|
128 | const chrono::time_point<Clock, Duration>& t,
|
---|
129 | Predicate pred)
|
---|
130 | {
|
---|
131 | while (!pred())
|
---|
132 | {
|
---|
133 | if (wait_until(lock, t) == cv_status::timeout)
|
---|
134 | return pred();
|
---|
135 | }
|
---|
136 | return true;
|
---|
137 | }
|
---|
138 |
|
---|
139 |
|
---|
140 | template <class Rep, class Period>
|
---|
141 | cv_status
|
---|
142 | wait_for(
|
---|
143 | unique_lock<mutex>& lock,
|
---|
144 | const chrono::duration<Rep, Period>& d)
|
---|
145 | {
|
---|
146 | using namespace chrono;
|
---|
147 | steady_clock::time_point c_now = steady_clock::now();
|
---|
148 | wait_until(lock, c_now + ceil<nanoseconds>(d));
|
---|
149 | return steady_clock::now() - c_now < d ? cv_status::no_timeout :
|
---|
150 | cv_status::timeout;
|
---|
151 |
|
---|
152 | }
|
---|
153 |
|
---|
154 |
|
---|
155 | template <class Rep, class Period, class Predicate>
|
---|
156 | bool
|
---|
157 | wait_for(
|
---|
158 | unique_lock<mutex>& lock,
|
---|
159 | const chrono::duration<Rep, Period>& d,
|
---|
160 | Predicate pred)
|
---|
161 | {
|
---|
162 | return wait_until(lock, chrono::steady_clock::now() + d, boost::move(pred));
|
---|
163 | }
|
---|
164 | #endif
|
---|
165 |
|
---|
166 | #define BOOST_THREAD_DEFINES_CONDITION_VARIABLE_NATIVE_HANDLE
|
---|
167 | typedef pthread_cond_t* native_handle_type;
|
---|
168 | native_handle_type native_handle()
|
---|
169 | {
|
---|
170 | return &cond;
|
---|
171 | }
|
---|
172 |
|
---|
173 | void notify_one() BOOST_NOEXCEPT;
|
---|
174 | void notify_all() BOOST_NOEXCEPT;
|
---|
175 |
|
---|
176 | #ifdef BOOST_THREAD_USES_CHRONO
|
---|
177 | inline cv_status wait_until(
|
---|
178 | unique_lock<mutex>& lk,
|
---|
179 | chrono::time_point<chrono::steady_clock, chrono::nanoseconds> tp)
|
---|
180 | {
|
---|
181 | using namespace chrono;
|
---|
182 | nanoseconds d = tp.time_since_epoch();
|
---|
183 | timespec ts = boost::detail::to_timespec(d);
|
---|
184 | if (do_wait_until(lk, ts)) return cv_status::no_timeout;
|
---|
185 | else return cv_status::timeout;
|
---|
186 | }
|
---|
187 | #endif
|
---|
188 | };
|
---|
189 |
|
---|
190 | BOOST_THREAD_DECL void notify_all_at_thread_exit(condition_variable_steady& cond, unique_lock<mutex> lk);
|
---|
191 |
|
---|
192 |
|
---|
193 | inline void condition_variable_steady::wait(unique_lock<mutex>& m)
|
---|
194 | {
|
---|
195 | #if defined BOOST_THREAD_THROW_IF_PRECONDITION_NOT_SATISFIED
|
---|
196 | if(! m.owns_lock())
|
---|
197 | {
|
---|
198 | boost::throw_exception(condition_error(-1, "boost::condition_variable_steady::wait() failed precondition mutex not owned"));
|
---|
199 | }
|
---|
200 | #endif
|
---|
201 | int res=0;
|
---|
202 | {
|
---|
203 | #if defined BOOST_THREAD_PROVIDES_INTERRUPTIONS
|
---|
204 | thread_cv_detail::lock_on_exit<unique_lock<mutex> > guard;
|
---|
205 | detail::interruption_checker check_for_interruption(&internal_mutex,&cond);
|
---|
206 | guard.activate(m);
|
---|
207 | do {
|
---|
208 | res = pthread_cond_wait(&cond,&internal_mutex);
|
---|
209 | } while (res == EINTR);
|
---|
210 | #else
|
---|
211 | //boost::pthread::pthread_mutex_scoped_lock check_for_interruption(&internal_mutex);
|
---|
212 | pthread_mutex_t* the_mutex = m.mutex()->native_handle();
|
---|
213 | do {
|
---|
214 | res = pthread_cond_wait(&cond,the_mutex);
|
---|
215 | } while (res == EINTR);
|
---|
216 | #endif
|
---|
217 | }
|
---|
218 | #if defined BOOST_THREAD_PROVIDES_INTERRUPTIONS
|
---|
219 | this_thread::interruption_point();
|
---|
220 | #endif
|
---|
221 | if(res)
|
---|
222 | {
|
---|
223 | boost::throw_exception(condition_error(res, "boost::condition_variable_steady::wait failed in pthread_cond_wait"));
|
---|
224 | }
|
---|
225 | }
|
---|
226 |
|
---|
227 | inline bool condition_variable_steady::do_wait_until(
|
---|
228 | unique_lock<mutex>& m,
|
---|
229 | struct timespec const &timeout)
|
---|
230 | {
|
---|
231 | #if defined BOOST_THREAD_THROW_IF_PRECONDITION_NOT_SATISFIED
|
---|
232 | if (!m.owns_lock())
|
---|
233 | {
|
---|
234 | boost::throw_exception(condition_error(EPERM, "boost::condition_variable_steady::do_wait_until() failed precondition mutex not owned"));
|
---|
235 | }
|
---|
236 | #endif
|
---|
237 | thread_cv_detail::lock_on_exit<unique_lock<mutex> > guard;
|
---|
238 | int cond_res;
|
---|
239 | {
|
---|
240 | #if defined BOOST_THREAD_PROVIDES_INTERRUPTIONS
|
---|
241 | detail::interruption_checker check_for_interruption(&internal_mutex,&cond);
|
---|
242 | guard.activate(m);
|
---|
243 | cond_res=pthread_cond_timedwait(&cond,&internal_mutex,&timeout);
|
---|
244 | #else
|
---|
245 | //boost::pthread::pthread_mutex_scoped_lock check_for_interruption(&internal_mutex);
|
---|
246 | pthread_mutex_t* the_mutex = m.mutex()->native_handle();
|
---|
247 | cond_res=pthread_cond_timedwait(&cond,the_mutex,&timeout);
|
---|
248 | #endif
|
---|
249 | }
|
---|
250 | #if defined BOOST_THREAD_PROVIDES_INTERRUPTIONS
|
---|
251 | this_thread::interruption_point();
|
---|
252 | #endif
|
---|
253 | if(cond_res==ETIMEDOUT)
|
---|
254 | {
|
---|
255 | return false;
|
---|
256 | }
|
---|
257 | if(cond_res)
|
---|
258 | {
|
---|
259 | boost::throw_exception(condition_error(cond_res, "boost::condition_variable_steady::do_wait_until failed in pthread_cond_timedwait"));
|
---|
260 | }
|
---|
261 | return true;
|
---|
262 | }
|
---|
263 |
|
---|
264 | inline void condition_variable_steady::notify_one() BOOST_NOEXCEPT
|
---|
265 | {
|
---|
266 | #if defined BOOST_THREAD_PROVIDES_INTERRUPTIONS
|
---|
267 | boost::pthread::pthread_mutex_scoped_lock internal_lock(&internal_mutex);
|
---|
268 | #endif
|
---|
269 | BOOST_VERIFY(!pthread_cond_signal(&cond));
|
---|
270 | }
|
---|
271 |
|
---|
272 | inline void condition_variable_steady::notify_all() BOOST_NOEXCEPT
|
---|
273 | {
|
---|
274 | #if defined BOOST_THREAD_PROVIDES_INTERRUPTIONS
|
---|
275 | boost::pthread::pthread_mutex_scoped_lock internal_lock(&internal_mutex);
|
---|
276 | #endif
|
---|
277 | BOOST_VERIFY(!pthread_cond_broadcast(&cond));
|
---|
278 | }
|
---|
279 |
|
---|
280 | }
|
---|
281 |
|
---|
282 | #endif
|
---|