blob: db49a6103d62536cd6366d0d94e8eb5c6aa2d98f (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
/*
* Copyright (C) 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef INCLUDE_PERFETTO_BASE_THREAD_TASK_RUNNER_H_
#define INCLUDE_PERFETTO_BASE_THREAD_TASK_RUNNER_H_
#include <functional>
#include <thread>
#include "perfetto/base/unix_task_runner.h"
namespace perfetto {
namespace base {
// A UnixTaskRunner backed by a dedicated task thread. Shuts down the runner and
// joins the thread upon destruction. Can be moved to transfer ownership.
//
// Guarantees that:
// * the UnixTaskRunner will be constructed and destructed on the task thread.
// * the task thread will live for the lifetime of the UnixTaskRunner.
//
class ThreadTaskRunner {
public:
static ThreadTaskRunner CreateAndStart() { return ThreadTaskRunner(); }
ThreadTaskRunner(const ThreadTaskRunner&) = delete;
ThreadTaskRunner& operator=(const ThreadTaskRunner&) = delete;
ThreadTaskRunner(ThreadTaskRunner&&) noexcept;
ThreadTaskRunner& operator=(ThreadTaskRunner&&);
~ThreadTaskRunner();
// Returns a pointer to the UnixTaskRunner, which is valid for the lifetime of
// this ThreadTaskRunner object (unless this object is moved-from, in which
// case the pointer remains valid for the lifetime of the new owning
// ThreadTaskRunner).
//
// Warning: do not call Quit() on the returned runner pointer, the termination
// should be handled exclusively by this class' destructor.
UnixTaskRunner* get() const { return task_runner_; }
private:
ThreadTaskRunner();
void RunTaskThread(std::function<void(UnixTaskRunner*)> initializer);
std::thread thread_;
UnixTaskRunner* task_runner_ = nullptr;
};
} // namespace base
} // namespace perfetto
#endif // INCLUDE_PERFETTO_BASE_THREAD_TASK_RUNNER_H_
|
