Page Speed Optimization Libraries
1.2.24.1
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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 00034 class SimpleStatsVariable : public Variable { 00035 public: 00036 explicit SimpleStatsVariable(AbstractMutex* mutex); 00037 virtual ~SimpleStatsVariable(); 00038 virtual int64 Get() const; 00039 virtual void Set(int64 value); 00040 virtual int64 Add(int delta); 00041 virtual StringPiece GetName() const { return StringPiece(NULL); } 00042 00043 private: 00044 int64 value_; 00045 scoped_ptr<AbstractMutex> mutex_; 00046 DISALLOW_COPY_AND_ASSIGN(SimpleStatsVariable); 00047 }; 00048 00050 class SimpleStats : public ScalarStatisticsTemplate<SimpleStatsVariable> { 00051 public: 00052 SimpleStats(); 00053 virtual ~SimpleStats(); 00054 00055 protected: 00056 virtual SimpleStatsVariable* NewVariable(const StringPiece& name, int index); 00057 00058 private: 00059 scoped_ptr<ThreadSystem> thread_system_; 00060 00061 DISALLOW_COPY_AND_ASSIGN(SimpleStats); 00062 }; 00063 00064 } 00065 00066 #endif ///< NET_INSTAWEB_UTIL_PUBLIC_SIMPLE_STATS_H_