base/threading/thread_checker_impl.cc

   1 // Copyright (c) 2011 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 #include "base/threading/thread_checker_impl.h"
   6
   7 namespace base {
   8
   9 ThreadCheckerImpl::ThreadCheckerImpl()
  10     : valid_thread_id_(kInvalidThreadId) {
  11   EnsureThreadIdAssigned();
  12 }
  13
  14 ThreadCheckerImpl::~ThreadCheckerImpl() {}
  15
  16 bool ThreadCheckerImpl::CalledOnValidThread() const {
  17   EnsureThreadIdAssigned();
  18   AutoLock auto_lock(lock_);
  19   return valid_thread_id_ == PlatformThread::CurrentId();
  20 }
  21
  22 void ThreadCheckerImpl::DetachFromThread() {
  23   AutoLock auto_lock(lock_);
  24   valid_thread_id_ = kInvalidThreadId;
  25 }
  26
  27 void ThreadCheckerImpl::EnsureThreadIdAssigned() const {
  28   AutoLock auto_lock(lock_);
  29   if (valid_thread_id_ != kInvalidThreadId)
  30     return;
  31   valid_thread_id_ = PlatformThread::CurrentId();
  32 }
  33
  34 }  // namespace base