Line data    Source code

       1             : /*
       2             :  *  Copyright 2016 The WebRTC Project Authors. All rights reserved.
       3             :  *
       4             :  *  Use of this source code is governed by a BSD-style license
       5             :  *  that can be found in the LICENSE file in the root of the source
       6             :  *  tree. An additional intellectual property rights grant can be found
       7             :  *  in the file PATENTS.  All contributing project authors may
       8             :  *  be found in the AUTHORS file in the root of the source tree.
       9             :  */
      10             : 
      11             : #include "webrtc/base/task_queue_posix.h"
      12             : 
      13             : #include "webrtc/base/checks.h"
      14             : #include "webrtc/base/task_queue.h"
      15             : 
      16             : namespace rtc {
      17             : namespace internal {
      18             : pthread_key_t g_queue_ptr_tls = 0;
      19             : 
      20           0 : void InitializeTls() {
      21           0 :   RTC_CHECK(pthread_key_create(&g_queue_ptr_tls, nullptr) == 0);
      22           0 : }
      23             : 
      24           0 : pthread_key_t GetQueuePtrTls() {
      25             :   static pthread_once_t init_once = PTHREAD_ONCE_INIT;
      26           0 :   RTC_CHECK(pthread_once(&init_once, &InitializeTls) == 0);
      27           0 :   return g_queue_ptr_tls;
      28             : }
      29             : 
      30           0 : AutoSetCurrentQueuePtr::AutoSetCurrentQueuePtr(TaskQueue* q)
      31           0 :     : prev_(TaskQueue::Current()) {
      32           0 :   pthread_setspecific(GetQueuePtrTls(), q);
      33           0 : }
      34             : 
      35           0 : AutoSetCurrentQueuePtr::~AutoSetCurrentQueuePtr() {
      36           0 :   pthread_setspecific(GetQueuePtrTls(), prev_);
      37           0 : }
      38             : 
      39             : }  // namespace internal
      40             : }  // namespace rtc