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 #ifndef BASE_THREADING_THREAD_CHECKER_IMPL_H_ 6 #define BASE_THREADING_THREAD_CHECKER_IMPL_H_ 7 #pragma once 8 9 #include "base/base_api.h" 10 #include "base/synchronization/lock.h" 11 #include "base/threading/platform_thread.h" 12 13 namespace base { 14 15 // Real implementation of ThreadChecker, for use in debug mode, or 16 // for temporary use in release mode (e.g. to CHECK on a threading issue 17 // seen only in the wild). 18 // 19 // Note: You should almost always use the ThreadChecker class to get the 20 // right version for your build configuration. 21 class BASE_API ThreadCheckerImpl { 22 public: 23 ThreadCheckerImpl(); 24 ~ThreadCheckerImpl(); 25 26 bool CalledOnValidThread() const; 27 28 // Changes the thread that is checked for in CalledOnValidThread. This may 29 // be useful when an object may be created on one thread and then used 30 // exclusively on another thread. 31 void DetachFromThread(); 32 33 private: 34 void EnsureThreadIdAssigned() const; 35 36 mutable base::Lock lock_; 37 // This is mutable so that CalledOnValidThread can set it. 38 // It's guarded by |lock_|. 39 mutable PlatformThreadId valid_thread_id_; 40 }; 41 42 } // namespace base 43 44 #endif // BASE_THREADING_THREAD_CHECKER_IMPL_H_ 45
