1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "base/task_queue.h" 6 7 #include "base/logging.h" 8 #include "base/stl_util-inl.h" 9 10 TaskQueue::TaskQueue() { 11 } 12 13 TaskQueue::~TaskQueue() { 14 // We own all the pointes in |queue_|. It is our job to delete them. 15 STLDeleteElements(&queue_); 16 } 17 18 void TaskQueue::Push(Task* task) { 19 DCHECK(task); 20 21 // Add the task to the back of the queue. 22 queue_.push_back(task); 23 } 24 25 void TaskQueue::Clear() { 26 // Delete all the elements in the queue and clear the dead pointers. 27 STLDeleteElements(&queue_); 28 } 29 30 bool TaskQueue::IsEmpty() const { 31 return queue_.empty(); 32 } 33 34 void TaskQueue::Run() { 35 // Nothing to run if our queue is empty. 36 if (queue_.empty()) 37 return; 38 39 std::deque<Task*> ready; 40 queue_.swap(ready); 41 42 // Run the tasks that are ready. 43 std::deque<Task*>::const_iterator task; 44 for (task = ready.begin(); task != ready.end(); ++task) { 45 // Run the task and then delete it. 46 (*task)->Run(); 47 delete (*task); 48 } 49 } 50
