1 //===-------------------- condition_variable.cpp --------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "condition_variable"
12 #include "system_error"
15 _LIBCPP_BEGIN_NAMESPACE_STD
17 condition_variable::~condition_variable()
19 pthread_cond_destroy(&__cv_);
23 condition_variable::notify_one() _NOEXCEPT
25 pthread_cond_signal(&__cv_);
29 condition_variable::notify_all() _NOEXCEPT
31 pthread_cond_broadcast(&__cv_);
35 condition_variable::wait(unique_lock<mutex>& lk)
38 __throw_system_error(EPERM,
39 "condition_variable::wait: mutex not locked");
40 int ec = pthread_cond_wait(&__cv_, lk.mutex()->native_handle());
42 __throw_system_error(ec, "condition_variable wait failed");
46 condition_variable::__do_timed_wait(unique_lock<mutex>& lk,
47 chrono::time_point<chrono::system_clock, chrono::nanoseconds> tp)
49 using namespace chrono;
51 __throw_system_error(EPERM,
52 "condition_variable::timed wait: mutex not locked");
53 nanoseconds d = tp.time_since_epoch();
54 if (d > nanoseconds(0x59682F000000E941))
55 d = nanoseconds(0x59682F000000E941);
57 seconds s = duration_cast<seconds>(d);
58 typedef decltype(ts.tv_sec) ts_sec;
59 _LIBCPP_CONSTEXPR ts_sec ts_sec_max = numeric_limits<ts_sec>::max();
60 if (s.count() < ts_sec_max)
62 ts.tv_sec = static_cast<ts_sec>(s.count());
63 ts.tv_nsec = static_cast<decltype(ts.tv_nsec)>((d - s).count());
67 ts.tv_sec = ts_sec_max;
68 ts.tv_nsec = giga::num - 1;
70 int ec = pthread_cond_timedwait(&__cv_, lk.mutex()->native_handle(), &ts);
71 if (ec != 0 && ec != ETIMEDOUT)
72 __throw_system_error(ec, "condition_variable timed_wait failed");
76 notify_all_at_thread_exit(condition_variable& cond, unique_lock<mutex> lk)
78 __thread_local_data()->notify_all_at_thread_exit(&cond, lk.release());
81 _LIBCPP_END_NAMESPACE_STD