Page Speed Optimization Libraries  1.4.26.1
net/instaweb/util/public/null_mutex.h
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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_NULL_MUTEX_H_
00020 #define NET_INSTAWEB_UTIL_PUBLIC_NULL_MUTEX_H_
00021 
00022 #include "net/instaweb/util/public/abstract_mutex.h"
00023 
00024 namespace net_instaweb {
00025 
00028 class NullMutex : public AbstractMutex {
00029  public:
00030   NullMutex() {}
00031   virtual ~NullMutex();
00032   virtual bool TryLock();
00033   virtual void Lock();
00034   virtual void Unlock();
00035 };
00036 
00037 }  
00038 
00039 #endif  ///< NET_INSTAWEB_UTIL_PUBLIC_NULL_MUTEX_H_
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