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// Copyright 2018 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.
#ifndef UTIL_RUN_LOOP_H_
#define UTIL_RUN_LOOP_H_
#include "base/macros.h"
#include "util/task.h"
#include <condition_variable>
#include <mutex>
#include <queue>
class MsgLoop {
public:
MsgLoop();
~MsgLoop();
// Blocks until PostQuit() is called, processing work items posted via
void Run();
// Schedules Run() to exit, but will not happen until other outstanding tasks
// complete. Can be called from any thread.
void PostQuit();
// Posts a work item to this queue. All items will be run on the thread from
// which Run() was called. Can be called from any thread.
void PostTask(Task task);
// Run()s until the queue is empty. Should only be used (carefully) in tests.
void RunUntilIdleForTesting();
// Gets the MsgLoop for the thread from which it's called, or nullptr if
// there's no MsgLoop for the current thread.
static MsgLoop* Current();
private:
std::mutex queue_mutex_;
std::queue<Task> task_queue_;
std::condition_variable notifier_;
bool should_quit_ = false;
DISALLOW_COPY_AND_ASSIGN(MsgLoop);
};
#endif // UTIL_RUN_LOOP_H_
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