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/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "webrtc/system_wrappers/source/condition_variable_posix.h"
#include <errno.h>
#if defined(WEBRTC_LINUX)
#include <time.h>
#else
#include <sys/time.h>
#endif
#include "webrtc/system_wrappers/source/critical_section_posix.h"
namespace webrtc {
ConditionVariableWrapper* ConditionVariablePosix::Create() {
ConditionVariablePosix* ptr = new ConditionVariablePosix;
if (!ptr) {
return NULL;
}
const int error = ptr->Construct();
if (error) {
delete ptr;
return NULL;
}
return ptr;
}
ConditionVariablePosix::ConditionVariablePosix() {
}
int ConditionVariablePosix::Construct() {
#ifdef WEBRTC_CLOCK_TYPE_REALTIME
pthread_cond_init(&cond_, NULL);
#else
int result = 0;
pthread_condattr_t cond_attr;
result = pthread_condattr_init(&cond_attr);
if (result != 0) {
return -1;
}
result = pthread_condattr_setclock(&cond_attr, CLOCK_MONOTONIC);
if (result != 0) {
return -1;
}
result = pthread_cond_init(&cond_, &cond_attr);
if (result != 0) {
return -1;
}
result = pthread_condattr_destroy(&cond_attr);
if (result != 0) {
return -1;
}
#endif
return 0;
}
ConditionVariablePosix::~ConditionVariablePosix() {
pthread_cond_destroy(&cond_);
}
void ConditionVariablePosix::SleepCS(CriticalSectionWrapper& crit_sect) {
CriticalSectionPosix* cs = reinterpret_cast<CriticalSectionPosix*>(
&crit_sect);
pthread_cond_wait(&cond_, &cs->mutex_);
}
bool ConditionVariablePosix::SleepCS(CriticalSectionWrapper& crit_sect,
unsigned long max_time_inMS) {
const unsigned long INFINITE = 0xFFFFFFFF;
const int MILLISECONDS_PER_SECOND = 1000;
#ifndef WEBRTC_LINUX
const int MICROSECONDS_PER_MILLISECOND = 1000;
#endif
const int NANOSECONDS_PER_SECOND = 1000000000;
const int NANOSECONDS_PER_MILLISECOND = 1000000;
CriticalSectionPosix* cs = reinterpret_cast<CriticalSectionPosix*>(
&crit_sect);
if (max_time_inMS != INFINITE) {
timespec ts;
#ifndef WEBRTC_MAC
#ifdef WEBRTC_CLOCK_TYPE_REALTIME
clock_gettime(CLOCK_REALTIME, &ts);
#else
clock_gettime(CLOCK_MONOTONIC, &ts);
#endif
#else // WEBRTC_MAC
struct timeval tv;
gettimeofday(&tv, 0);
ts.tv_sec = tv.tv_sec;
ts.tv_nsec = tv.tv_usec * MICROSECONDS_PER_MILLISECOND;
#endif
ts.tv_sec += max_time_inMS / MILLISECONDS_PER_SECOND;
ts.tv_nsec +=
(max_time_inMS
- ((max_time_inMS / MILLISECONDS_PER_SECOND) * MILLISECONDS_PER_SECOND))
* NANOSECONDS_PER_MILLISECOND;
if (ts.tv_nsec >= NANOSECONDS_PER_SECOND) {
ts.tv_sec += ts.tv_nsec / NANOSECONDS_PER_SECOND;
ts.tv_nsec %= NANOSECONDS_PER_SECOND;
}
const int res = pthread_cond_timedwait(&cond_, &cs->mutex_, &ts);
return (res == ETIMEDOUT) ? false : true;
} else {
pthread_cond_wait(&cond_, &cs->mutex_);
return true;
}
}
void ConditionVariablePosix::Wake() {
pthread_cond_signal(&cond_);
}
void ConditionVariablePosix::WakeAll() {
pthread_cond_broadcast(&cond_);
}
} // namespace webrtc
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