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// Copyright 2015 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 CHROMECAST_PUBLIC_TASK_RUNNER_H_
#define CHROMECAST_PUBLIC_TASK_RUNNER_H_
#include <stdint.h>
namespace chromecast {
// Provides a way for vendor libraries to run code on a specific thread.
// For example, cast_shell supplies an implementation of this interface through
// media APIs (see MediaPipelineDeviceParams) to allow media backends to
// schedule tasks to be run on the media thread.
class TaskRunner {
public:
// Subclass and implement 'Run' to supply code to be run by PostTask or
// PostDelayedTask. They both take ownership of the Task object passed in
// and will delete after running the Task.
class Task {
public:
virtual ~Task() {}
virtual void Run() = 0;
};
// Posts a task to the thread's task queue. Delay of 0 could mean task
// runs immediately (within the call to PostTask, if it's called on the
// target thread) but there also could be some delay (the task could be added
// to target thread's task queue).
virtual bool PostTask(Task* task, uint64_t delay_milliseconds) = 0;
protected:
virtual ~TaskRunner() {}
};
} // namespace chromecast
#endif // CHROMECAST_PUBLIC_TASK_RUNNER_H_
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