Page Speed Optimization Libraries
1.3.25.1
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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 "net/instaweb/util/public/atomic_bool.h" 00025 #include "net/instaweb/util/public/atomic_int32.h" 00026 #include "net/instaweb/util/public/basictypes.h" 00027 #include "net/instaweb/util/public/scoped_ptr.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 explicit Mutex(ThreadSystem::CondvarCapableMutex* mutex) : mutex_(mutex) { } 00057 virtual ~Mutex(); 00058 00059 virtual bool TryLock(); 00060 virtual void Lock(); 00061 virtual void Unlock(); 00063 virtual void DCheckLocked(); 00064 00066 virtual void DCheckUnlocked(); 00067 00069 virtual ThreadSystem::Condvar* NewCondvar(); 00070 00071 private: 00072 friend class CheckingCondvar; 00073 void TakeLockControl(); 00074 void DropLockControl(); 00075 00076 scoped_ptr<ThreadSystem::CondvarCapableMutex> mutex_; 00077 AtomicBool locked_; 00078 DISALLOW_COPY_AND_ASSIGN(Mutex); 00079 }; 00080 00085 class RWLock : public ThreadSystem::RWLock { 00086 public: 00087 explicit RWLock(ThreadSystem::RWLock* lock) : lock_(lock) { } 00088 virtual ~RWLock(); 00089 00090 virtual bool TryLock(); 00091 virtual void Lock(); 00092 virtual void Unlock(); 00093 virtual bool ReaderTryLock(); 00094 virtual void ReaderLock(); 00095 virtual void ReaderUnlock(); 00096 00098 virtual void DCheckLocked(); 00099 virtual void DCheckReaderLocked(); 00100 00101 private: 00102 void TakeLockControl(); 00103 void DropLockControl(); 00104 void TakeReaderLockControl(); 00105 void DropReaderLockControl(); 00106 00107 scoped_ptr<ThreadSystem::RWLock> lock_; 00108 AtomicInt32 locked_; 00109 DISALLOW_COPY_AND_ASSIGN(RWLock); 00110 }; 00111 00112 explicit CheckingThreadSystem(ThreadSystem* thread_system) 00113 : thread_system_(thread_system) { } 00114 virtual ~CheckingThreadSystem(); 00115 00116 virtual Mutex* NewMutex(); 00117 virtual RWLock* NewRWLock(); 00118 virtual Timer* NewTimer(); 00119 00120 private: 00121 friend class Mutex; 00122 00123 virtual ThreadImpl* NewThreadImpl(Thread* wrapper, ThreadFlags flags); 00124 00125 scoped_ptr<ThreadSystem> thread_system_; 00126 DISALLOW_COPY_AND_ASSIGN(CheckingThreadSystem); 00127 }; 00128 00129 } 00130 00131 #endif ///< NET_INSTAWEB_UTIL_PUBLIC_CHECKING_THREAD_SYSTEM_H_