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Side by Side Diff: chromecast/public/task_runner.h

Issue 1257013003: Load CMA backend from shared library (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Commenting public APIs reverted VideoClient ownership Created 5 years, 4 months ago
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1 // Copyright 2015 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 #ifndef CHROMECAST_PUBLIC_TASK_RUNNER_H_
6 #define CHROMECAST_PUBLIC_TASK_RUNNER_H_
7
8 #include <stdint.h>
9
10 namespace chromecast {
11
12 // Provides a way for vendor libraries to run code on a specific thread.
13 // For example, cast_shell supplies an implementation of this interface through
14 // media APIs (see MediaPipelineDeviceParams) to allow media backends to
15 // schedule tasks to be run on the media thread.
16 class TaskRunner {
17 public:
18 // Subclass and implement 'Run' to supply code to be run by PostTask or
19 // PostDelayedTask. They both take ownership of the Task object passed in
20 // and will delete after running the Task.
21 class Task {
22 public:
23 virtual ~Task() {}
24 virtual void Run() = 0;
25 };
26
27 virtual ~TaskRunner() {}
28
29 // Returns true if currently on the thread tied to this TaskRunner.
30 virtual bool BelongsToCurrentThread() = 0;
byungchul 2015/07/29 20:32:23 Is it necessary?
halliwell 2015/07/29 22:39:27 It's useful, and used: for the standard "if (!belo
byungchul 2015/07/29 23:12:30 Shouldn't the pattern, "if (!belongs to current th
halliwell 2015/07/30 00:19:57 That's fair. I removed it from the API here. Tas
31
32 // Posts a task to the thread's task queue. Delay of 0 does not necessarily
33 // mean the task will run immediately, just as soon as it can be.
34 virtual bool PostTask(Task* task, uint64_t delay_milliseconds) = 0;
35 };
36
37 } // namespace chromecast
38
39 #endif // CHROMECAST_PUBLIC_TASK_RUNNER_H_
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