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73 lines (59 loc) · 2.04 KB
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/*
* Tencent is pleased to support the open source community by making Pebble available.
* Copyright (C) 2016 THL A29 Limited, a Tencent company. All rights reserved.
* Licensed under the MIT License (the "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
* http://opensource.org/licenses/MIT
* Unless required by applicable law or agreed to in writing, software distributed under the License
* is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
* or implied. See the License for the specific language governing permissions and limitations under
* the License.
*
*/
#include <assert.h>
#include <sys/time.h>
#include <stdexcept>
#include <stdint.h>
#include <string>
#include "common/condition_variable.h"
namespace pebble {
ConditionVariable::ConditionVariable() {
pthread_condattr_t cond_attr;
pthread_condattr_init(&cond_attr);
pthread_cond_init(&m_hCondition, &cond_attr);
pthread_condattr_destroy(&cond_attr);
}
ConditionVariable::~ConditionVariable() {
pthread_cond_destroy(&m_hCondition);
}
void ConditionVariable::CheckValid() const
{
assert(m_hCondition.__data.__total_seq != -1ULL && "this cond has been destructed");
}
void ConditionVariable::Signal() {
CheckValid();
pthread_cond_signal(&m_hCondition);
}
void ConditionVariable::Broadcast() {
CheckValid();
pthread_cond_broadcast(&m_hCondition);
}
void ConditionVariable::Wait(Mutex* mutex) {
CheckValid();
pthread_cond_wait(&m_hCondition, mutex->GetMutex());
}
int ConditionVariable::TimedWait(Mutex* mutex, int timeout_in_ms) {
// -1 转为无限等
if (timeout_in_ms < 0) {
Wait(mutex);
return 0;
}
timespec ts;
struct timeval tv;
gettimeofday(&tv, NULL);
int64_t usec = tv.tv_usec + timeout_in_ms * 1000LL;
ts.tv_sec = tv.tv_sec + usec / 1000000;
ts.tv_nsec = (usec % 1000000) * 1000;
return pthread_cond_timedwait(&m_hCondition, mutex->GetMutex(), &ts);
}
} // namespace pebble