Page Speed Optimization Libraries
1.4.26.1
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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 #include "net/instaweb/util/public/string_util.h" 00028 00029 namespace net_instaweb { 00030 00031 class Function; 00032 class ThreadSystem; 00033 class Waveform; 00034 00042 class Worker { 00043 public: 00045 void Start(); 00046 00049 bool IsBusy(); 00050 00054 void ShutDown(); 00055 00059 void set_queue_size_stat(Waveform* x) { queue_size_ = x; } 00060 00061 protected: 00062 Worker(StringPiece thread_name, ThreadSystem* runtime); 00063 virtual ~Worker(); 00064 00070 bool QueueIfPermitted(Function* closure); 00071 00074 virtual bool IsPermitted(Function* closure) = 0; 00075 00081 int NumJobs(); 00082 00083 private: 00084 class WorkThread; 00085 friend class WorkThread; 00086 00088 void UpdateQueueSizeStat(int size); 00089 00090 scoped_ptr<WorkThread> thread_; 00091 Waveform* queue_size_; 00092 00093 DISALLOW_COPY_AND_ASSIGN(Worker); 00094 }; 00095 00096 } 00097 00098 #endif ///< NET_INSTAWEB_UTIL_PUBLIC_WORKER_H_