79 lines
1.9 KiB
C++
79 lines
1.9 KiB
C++
|
/*
|
||
|
|
* 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"
|
||
|
|
|
||
|
|
#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
|