Page Speed Optimization Libraries
1.2.24.1
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00001 /* 00002 * Copyright 2012 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 00020 00021 #ifndef NET_INSTAWEB_UTIL_PUBLIC_THREAD_SYNCHRONIZER_H__ 00022 #define NET_INSTAWEB_UTIL_PUBLIC_THREAD_SYNCHRONIZER_H__ 00023 00024 #include <map> 00025 00026 #include "net/instaweb/util/public/basictypes.h" 00027 #include "net/instaweb/util/public/scoped_ptr.h" 00028 #include "net/instaweb/util/public/string.h" 00029 #include "net/instaweb/util/public/string_util.h" 00030 00031 namespace net_instaweb { 00032 00033 class AbstractMutex; 00034 class ThreadSystem; 00035 class Timer; 00036 00055 class ThreadSynchronizer { 00056 public: 00057 explicit ThreadSynchronizer(ThreadSystem* thread_system); 00058 ~ThreadSynchronizer(); 00059 00066 void EnableForPrefix(StringPiece prefix) { 00067 enabled_ = true; 00068 prefix.CopyToString(StringVectorAdd(&prefixes_)); 00069 } 00070 00072 void Wait(const char* key) { 00073 if (enabled_) { 00074 DoWait(key); 00075 } 00076 } 00077 00082 void TimedWait(const char* key, int64 timeout_ms) { 00083 if (enabled_) { 00084 DoTimedWait(key, timeout_ms); 00085 } 00086 } 00087 00092 void Signal(const char* key) { 00093 if (enabled_) { 00094 DoSignal(key); 00095 } 00096 } 00097 00103 void AllowSloppyTermination(const char* key); 00104 00105 private: 00106 class SyncPoint; 00107 typedef std::map<GoogleString, SyncPoint*> SyncMap; 00108 00109 SyncPoint* GetSyncPoint(const GoogleString& key); 00110 void DoWait(const char* key); 00111 void DoTimedWait(const char* key, int64 timeout_ms); 00112 void DoSignal(const char* key); 00113 bool MatchesPrefix(const char* key) const; 00114 00115 bool enabled_; 00116 ThreadSystem* thread_system_; 00117 SyncMap sync_map_; 00118 scoped_ptr<AbstractMutex> map_mutex_; 00119 scoped_ptr<Timer> timer_; 00120 StringVector prefixes_; 00121 00122 DISALLOW_COPY_AND_ASSIGN(ThreadSynchronizer); 00123 }; 00124 00125 } 00126 00127 #endif ///< NET_INSTAWEB_UTIL_PUBLIC_THREAD_SYNCHRONIZER_H__