Page Speed Optimization Libraries
1.2.24.1
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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 00021 00022 #ifndef NET_INSTAWEB_UTIL_PUBLIC_WORKER_H_ 00023 #define NET_INSTAWEB_UTIL_PUBLIC_WORKER_H_ 00024 00025 #include "net/instaweb/util/public/basictypes.h" 00026 #include "net/instaweb/util/public/scoped_ptr.h" 00027 00028 namespace net_instaweb { 00029 00030 class Function; 00031 class ThreadSystem; 00032 class Waveform; 00033 00041 class Worker { 00042 public: 00044 void Start(); 00045 00048 bool IsBusy(); 00049 00053 void ShutDown(); 00054 00058 void set_queue_size_stat(Waveform* x) { queue_size_ = x; } 00059 00060 protected: 00061 explicit Worker(ThreadSystem* runtime); 00062 virtual ~Worker(); 00063 00069 bool QueueIfPermitted(Function* closure); 00070 00073 virtual bool IsPermitted(Function* closure) = 0; 00074 00080 int NumJobs(); 00081 00082 private: 00083 class WorkThread; 00084 friend class WorkThread; 00085 00087 void UpdateQueueSizeStat(int size); 00088 00089 scoped_ptr<WorkThread> thread_; 00090 Waveform* queue_size_; 00091 00092 DISALLOW_COPY_AND_ASSIGN(Worker); 00093 }; 00094 00095 } 00096 00097 #endif ///< NET_INSTAWEB_UTIL_PUBLIC_WORKER_H_