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