Queue.h
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/*
* Copyright 2002-2014 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* CC/LICENSE
*
* 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.
*/
#ifndef QUEUE_H
#define QUEUE_H
#include <deque>
#include <bgcc.h>
#ifndef _WIN32
#include <errno.h>
#endif
using namespace bgcc;
template <typename ElementType>
class Queue {
public:
typedef Guard<Mutex> ScopeGuard;
Queue() {}
bool put(const ElementType& item) {
ScopeGuard guard(&_mutex);
try {
_q.push_back(item);
} catch (std::bad_alloc&) {
/*记录日志*/
BGCC_NOTICE("ap", "Queue Put item fail.");
return false;
}
_sema.signal();
return true;
}
bool get(ElementType& ret, int32_t timeout = 0) {
int32_t rv = _sema.wait(timeout);
if (0 != rv) {
return false;
}
{
ScopeGuard guard(&_mutex);
ret = _q.front();
_q.pop_front();
}
return true;
}
int32_t size() {
ScopeGuard guard(&_mutex);
return _q.size();
}
void clear() {
ScopeGuard guard(&_mutex);
_q.clear();
return;
}
private:
Mutex _mutex; /** 互斥量*/
Semaphore _sema; /** 条件变量*/
std::deque<ElementType> _q; /** 队列*/
};
#endif // QUEUE_H