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61 lines
1.6 KiB
C
61 lines
1.6 KiB
C
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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef PENDING_TASK_H_
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#define PENDING_TASK_H_
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#include <queue>
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#include "base/base_export.h"
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#include "base/callback.h"
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#include "base/location.h"
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#include "base/time/time.h"
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#include "base/tracking_info.h"
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namespace base {
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// Contains data about a pending task. Stored in TaskQueue and DelayedTaskQueue
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// for use by classes that queue and execute tasks.
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struct BASE_EXPORT PendingTask : public TrackingInfo {
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#if _MSC_VER >= 1700
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PendingTask();
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#endif
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PendingTask(const tracked_objects::Location& posted_from,
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const Closure& task);
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PendingTask(const tracked_objects::Location& posted_from,
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const Closure& task,
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TimeTicks delayed_run_time,
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bool nestable);
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~PendingTask();
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// Used to support sorting.
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bool operator<(const PendingTask& other) const;
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// The task to run.
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Closure task;
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// The site this PendingTask was posted from.
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tracked_objects::Location posted_from;
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// Secondary sort key for run time.
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int sequence_num;
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// OK to dispatch from a nested loop.
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bool nestable;
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};
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// Wrapper around std::queue specialized for PendingTask which adds a Swap
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// helper method.
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class BASE_EXPORT TaskQueue : public std::queue<PendingTask> {
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public:
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void Swap(TaskQueue* queue);
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};
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// PendingTasks are sorted by their |delayed_run_time| property.
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typedef std::priority_queue<base::PendingTask> DelayedTaskQueue;
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} // namespace base
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#endif // PENDING_TASK_H_
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