blob: 7373ec3ce5d06c866ff7627b5920579fd8462017 [file] [log] [blame]
//===-------------------- condition_variable.cpp --------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "condition_variable"
#include "thread"
#include "system_error"
#include "cassert"
_LIBCPP_BEGIN_NAMESPACE_STD
condition_variable::~condition_variable()
{
int e = pthread_cond_destroy(&__cv_);
// assert(e == 0);
}
void
condition_variable::notify_one()
{
pthread_cond_signal(&__cv_);
}
void
condition_variable::notify_all()
{
pthread_cond_broadcast(&__cv_);
}
void
condition_variable::wait(unique_lock<mutex>& lk)
{
if (!lk.owns_lock())
__throw_system_error(EPERM,
"condition_variable::wait: mutex not locked");
int ec = pthread_cond_wait(&__cv_, lk.mutex()->native_handle());
if (ec)
__throw_system_error(ec, "condition_variable wait failed");
}
void
condition_variable::__do_timed_wait(unique_lock<mutex>& lk,
chrono::time_point<chrono::system_clock, chrono::nanoseconds> tp)
{
using namespace chrono;
if (!lk.owns_lock())
__throw_system_error(EPERM,
"condition_variable::timed wait: mutex not locked");
nanoseconds d = tp.time_since_epoch();
timespec ts;
seconds s = duration_cast<seconds>(d);
ts.tv_sec = static_cast<decltype(ts.tv_sec)>(s.count());
ts.tv_nsec = static_cast<decltype(ts.tv_nsec)>((d - s).count());
int ec = pthread_cond_timedwait(&__cv_, lk.mutex()->native_handle(), &ts);
if (ec != 0 && ec != ETIMEDOUT)
__throw_system_error(ec, "condition_variable timed_wait failed");
}
_LIBCPP_END_NAMESPACE_STD