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// Copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/task_queue.h"
#include "base/logging.h"
#include "base/stl_util-inl.h"
TaskQueue::TaskQueue() {
}
TaskQueue::~TaskQueue() {
// We own all the pointes in |queue_|. It is our job to delete them.
STLDeleteElements(&queue_);
}
void TaskQueue::Push(Task* task) {
DCHECK(task);
// Add the task to the back of the queue.
queue_.push_back(task);
}
void TaskQueue::Clear() {
// Delete all the elements in the queue and clear the dead pointers.
STLDeleteElements(&queue_);
}
bool TaskQueue::IsEmpty() const {
return queue_.empty();
}
void TaskQueue::Run() {
// Nothing to run if our queue is empty.
if (queue_.empty())
return;
std::deque<Task*> ready;
queue_.swap(ready);
// Run the tasks that are ready.
std::deque<Task*>::const_iterator task;
for (task = ready.begin(); task != ready.end(); ++task) {
// Run the task and then delete it.
(*task)->Run();
delete (*task);
}
}
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