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_SCHEDULER_BASED_ABSTRACT_LOCK_H_ 00020 #define NET_INSTAWEB_UTIL_PUBLIC_SCHEDULER_BASED_ABSTRACT_LOCK_H_ 00021 00022 #include "net/instaweb/util/public/basictypes.h" 00023 #include "net/instaweb/util/public/named_lock_manager.h" 00024 00025 namespace net_instaweb { 00026 00027 class Function; 00028 class Scheduler; 00029 00036 class SchedulerBasedAbstractLock : public NamedLock { 00037 public: 00038 virtual ~SchedulerBasedAbstractLock(); 00039 virtual bool LockTimedWait(int64 wait_ms); 00040 virtual void LockTimedWait(int64 wait_ms, Function* callback); 00041 00042 virtual bool LockTimedWaitStealOld(int64 wait_ms, int64 steal_ms); 00043 virtual void LockTimedWaitStealOld( 00044 int64 wait_ms, int64 steal_ms, Function* callback); 00045 00046 protected: 00047 virtual Scheduler* scheduler() const = 0; 00048 00049 private: 00050 typedef bool (SchedulerBasedAbstractLock::*TryLockMethod)(int64 steal_ms); 00051 bool TryLockIgnoreSteal(int64 steal_ignored); 00052 bool BusySpin(TryLockMethod try_lock, int64 steal_ms); 00053 void PollAndCallback(TryLockMethod try_lock, int64 steal_ms, 00054 int64 wait_ms, Function* callback); 00055 }; 00056 00057 } 00058 00059 #endif ///< NET_INSTAWEB_UTIL_PUBLIC_SCHEDULER_BASED_ABSTRACT_LOCK_H_