00001 /* 00002 * Copyright 2011 Google Inc. 00003 * 00004 * Licensed under the Apache License, Version 2.0 (the "License"); 00005 * you may not use this file except in compliance with the License. 00006 * You may obtain a copy of the License at 00007 * 00008 * http:///www.apache.org/licenses/LICENSE-2.0 00009 * 00010 * Unless required by applicable law or agreed to in writing, software 00011 * distributed under the License is distributed on an "AS IS" BASIS, 00012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 00013 * See the License for the specific language governing permissions and 00014 * limitations under the License. 00015 */ 00016 00018 00019 #ifndef NET_INSTAWEB_UTIL_PUBLIC_CHECKING_THREAD_SYSTEM_H_ 00020 #define NET_INSTAWEB_UTIL_PUBLIC_CHECKING_THREAD_SYSTEM_H_ 00021 00022 #include "net/instaweb/util/public/thread_system.h" 00023 00024 #include "base/scoped_ptr.h" 00025 #include "net/instaweb/util/public/atomic_bool.h" 00026 #include "net/instaweb/util/public/atomic_int32.h" 00027 #include "net/instaweb/util/public/basictypes.h" 00028 00029 namespace net_instaweb { 00030 00031 class Timer; 00032 00041 class CheckingThreadSystem : public ThreadSystem { 00042 private: 00046 class CheckingCondvar; 00047 public: 00054 class Mutex : public ThreadSystem::CondvarCapableMutex { 00055 public: 00056 Mutex(ThreadSystem::CondvarCapableMutex* mutex) : mutex_(mutex) { } 00057 virtual ~Mutex(); 00058 00059 virtual void Lock(); 00060 virtual void Unlock(); 00062 virtual void DCheckLocked(); 00064 virtual ThreadSystem::Condvar* NewCondvar(); 00065 00066 private: 00067 friend class CheckingCondvar; 00068 void TakeLockControl(); 00069 void DropLockControl(); 00070 00071 scoped_ptr<ThreadSystem::CondvarCapableMutex> mutex_; 00072 AtomicBool locked_; 00073 DISALLOW_COPY_AND_ASSIGN(Mutex); 00074 }; 00075 00080 class RWLock : public ThreadSystem::RWLock { 00081 public: 00082 RWLock(ThreadSystem::RWLock* lock) : lock_(lock) { } 00083 virtual ~RWLock(); 00084 00085 virtual void Lock(); 00086 virtual void Unlock(); 00087 virtual void ReaderLock(); 00088 virtual void ReaderUnlock(); 00089 00091 virtual void DCheckLocked(); 00092 virtual void DCheckReaderLocked(); 00093 00094 private: 00095 void TakeLockControl(); 00096 void DropLockControl(); 00097 void TakeReaderLockControl(); 00098 void DropReaderLockControl(); 00099 00100 scoped_ptr<ThreadSystem::RWLock> lock_; 00101 AtomicInt32 locked_; 00102 DISALLOW_COPY_AND_ASSIGN(RWLock); 00103 }; 00104 00105 CheckingThreadSystem(ThreadSystem* thread_system) 00106 : thread_system_(thread_system) { } 00107 virtual ~CheckingThreadSystem(); 00108 00109 virtual Mutex* NewMutex(); 00110 virtual RWLock* NewRWLock(); 00111 virtual Timer* NewTimer(); 00112 00113 private: 00114 friend class Mutex; 00115 00116 virtual ThreadImpl* NewThreadImpl(Thread* wrapper, ThreadFlags flags); 00117 00118 scoped_ptr<ThreadSystem> thread_system_; 00119 DISALLOW_COPY_AND_ASSIGN(CheckingThreadSystem); 00120 }; 00121 00122 } 00123 00124 #endif ///< NET_INSTAWEB_UTIL_PUBLIC_CHECKING_THREAD_SYSTEM_H_