Page Speed Optimization Libraries  1.4.26.1
net/instaweb/util/public/named_lock_manager.h
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00001 /*
00002  * Copyright 2010 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_NAMED_LOCK_MANAGER_H_
00020 #define NET_INSTAWEB_UTIL_PUBLIC_NAMED_LOCK_MANAGER_H_
00021 
00022 #include "net/instaweb/util/public/basictypes.h"
00023 #include "net/instaweb/util/public/string.h"
00024 #include "net/instaweb/util/public/string_util.h"
00025 
00026 namespace net_instaweb {
00027 
00028 class Function;
00029 
00030 class NamedLock {
00031  public:
00033   virtual ~NamedLock();
00034 
00039   virtual bool TryLock() = 0;
00040 
00042   virtual bool LockTimedWait(int64 wait_ms) = 0;
00043 
00046   virtual void LockTimedWait(int64 wait_ms, Function* callback) = 0;
00047 
00052 
00057   virtual bool TryLockStealOld(int64 timeout_ms) = 0;
00058 
00061   virtual bool LockTimedWaitStealOld(int64 wait_ms, int64 timeout_ms) = 0;
00062 
00066   virtual void LockTimedWaitStealOld(int64 wait_ms, int64 timeout_ms,
00067                                      Function* callback) = 0;
00068 
00070   virtual void Unlock() = 0;
00071 
00073   virtual bool Held() = 0;
00074 
00076   virtual GoogleString name() = 0;
00077 };
00078 
00082 class NamedLockManager {
00083  public:
00084   virtual ~NamedLockManager();
00085   virtual NamedLock* CreateNamedLock(const StringPiece& name) = 0;
00086 };
00087 
00088 }  
00089 
00090 #endif  ///< NET_INSTAWEB_UTIL_PUBLIC_NAMED_LOCK_MANAGER_H_
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