blob: 7d3539a63d825097a99f304e7b567258d9f8acee (
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
67
68
69
70
71
72
73
74
75
76
77
78
79
|
/*
* Copyright 2019 The WebRTC Project Authors. All rights reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "api/task_queue/task_queue_base.h"
#include "absl/base/attributes.h"
#include "absl/base/config.h"
#include "rtc_base/checks.h"
#if defined(ABSL_HAVE_THREAD_LOCAL)
namespace webrtc {
namespace {
ABSL_CONST_INIT thread_local TaskQueueBase* current = nullptr;
} // namespace
TaskQueueBase* TaskQueueBase::Current() {
return current;
}
TaskQueueBase::CurrentTaskQueueSetter::CurrentTaskQueueSetter(
TaskQueueBase* task_queue)
: previous_(current) {
current = task_queue;
}
TaskQueueBase::CurrentTaskQueueSetter::~CurrentTaskQueueSetter() {
current = previous_;
}
} // namespace webrtc
#elif defined(WEBRTC_POSIX)
#include <pthread.h>
namespace webrtc {
namespace {
ABSL_CONST_INIT pthread_key_t g_queue_ptr_tls = 0;
void InitializeTls() {
RTC_CHECK(pthread_key_create(&g_queue_ptr_tls, nullptr) == 0);
}
pthread_key_t GetQueuePtrTls() {
static pthread_once_t init_once = PTHREAD_ONCE_INIT;
RTC_CHECK(pthread_once(&init_once, &InitializeTls) == 0);
return g_queue_ptr_tls;
}
} // namespace
TaskQueueBase* TaskQueueBase::Current() {
return static_cast<TaskQueueBase*>(pthread_getspecific(GetQueuePtrTls()));
}
TaskQueueBase::CurrentTaskQueueSetter::CurrentTaskQueueSetter(
TaskQueueBase* task_queue)
: previous_(TaskQueueBase::Current()) {
pthread_setspecific(GetQueuePtrTls(), task_queue);
}
TaskQueueBase::CurrentTaskQueueSetter::~CurrentTaskQueueSetter() {
pthread_setspecific(GetQueuePtrTls(), previous_);
}
} // namespace webrtc
#else
#error Unsupported platform
#endif
|
