blob: 7f3fccd8827c934f04b42debf5017d407b3bf3fa [file] [log] [blame]
// Copyright (c) 2011 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 <array>
#include <queue>
#include "base/base_export.h"
#include "base/callback.h"
#include "base/location.h"
#include "base/time/time.h"
#include "base/tracking_info.h"
namespace base {
// Contains data about a pending task. Stored in TaskQueue and DelayedTaskQueue
// for use by classes that queue and execute tasks.
struct BASE_EXPORT PendingTask : public TrackingInfo {
PendingTask(const tracked_objects::Location& posted_from, OnceClosure task);
PendingTask(const tracked_objects::Location& posted_from,
OnceClosure task,
TimeTicks delayed_run_time,
bool nestable);
PendingTask(PendingTask&& other);
PendingTask& operator=(PendingTask&& other);
// Used to support sorting.
bool operator<(const PendingTask& other) const;
// The task to run.
OnceClosure task;
// The site this PendingTask was posted from.
tracked_objects::Location posted_from;
// Task backtrace.
std::array<const void*, 4> task_backtrace;
// Secondary sort key for run time.
int sequence_num;
// OK to dispatch from a nested loop.
bool nestable;
// Needs high resolution timers.
bool is_high_res;
using TaskQueue = std::queue<PendingTask>;
// PendingTasks are sorted by their |delayed_run_time| property.
using DelayedTaskQueue = std::priority_queue<base::PendingTask>;
} // namespace base