Page Speed Optimization Libraries
1.5.27.2
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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_SIMPLE_STATS_H_ 00020 #define NET_INSTAWEB_UTIL_PUBLIC_SIMPLE_STATS_H_ 00021 00022 #include "net/instaweb/util/public/basictypes.h" 00023 #include "net/instaweb/util/public/scoped_ptr.h" 00024 #include "net/instaweb/util/public/statistics.h" 00025 #include "net/instaweb/util/public/statistics_template.h" 00026 #include "net/instaweb/util/public/string.h" 00027 #include "net/instaweb/util/public/string_util.h" 00028 00029 namespace net_instaweb { 00030 00031 class AbstractMutex; 00032 class ThreadSystem; 00033 00035 class SimpleStatsVariable : public Variable { 00036 public: 00037 explicit SimpleStatsVariable(AbstractMutex* mutex); 00038 virtual ~SimpleStatsVariable(); 00039 virtual int64 Get() const; 00040 virtual void Set(int64 value); 00041 virtual int64 Add(int delta); 00042 virtual StringPiece GetName() const { return StringPiece(NULL); } 00043 00044 private: 00045 int64 value_; 00046 scoped_ptr<AbstractMutex> mutex_; 00047 DISALLOW_COPY_AND_ASSIGN(SimpleStatsVariable); 00048 }; 00049 00051 class SimpleStats : public ScalarStatisticsTemplate<SimpleStatsVariable> { 00052 public: 00055 SimpleStats(); 00056 00059 explicit SimpleStats(ThreadSystem* thread_system); 00060 virtual ~SimpleStats(); 00061 00062 protected: 00063 virtual SimpleStatsVariable* NewVariable(const StringPiece& name, int index); 00064 00065 private: 00066 ThreadSystem* thread_system_; 00067 bool own_thread_system_; 00068 00069 DISALLOW_COPY_AND_ASSIGN(SimpleStats); 00070 }; 00071 00072 } 00073 00074 #endif ///< NET_INSTAWEB_UTIL_PUBLIC_SIMPLE_STATS_H_