00001 /* 00002 * Copyright 2004-2006 Intel Corporation 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 00017 00018 #ifndef _OASYS_NOTIFIER_H_ 00019 #define _OASYS_NOTIFIER_H_ 00020 00021 #include "../debug/Log.h" 00022 #include "Lock.h" 00023 00024 namespace oasys { 00025 00026 class SpinLock; 00027 00041 class Notifier : public Logger { 00042 public: 00047 Notifier(const char* logpath, bool keep_quiet = false); 00048 00052 ~Notifier(); 00053 00063 bool wait(SpinLock* lock = NULL, 00064 int timeout = -1, 00065 bool drain_the_pipe = true); 00066 00075 void notify(SpinLock* lock = NULL); 00076 00083 void drain_pipe(size_t bytes); 00084 00089 int read_fd() { return pipe_[0]; } 00090 00094 int write_fd() { return pipe_[1]; } 00095 00096 protected: 00097 bool waiter_; // for debugging only 00098 int count_; // for debugging as well 00099 int pipe_[2]; 00100 bool quiet_; // no logging 00101 atomic_t busy_notifiers_; // keep track notifications in progress 00102 }; 00103 00104 } // namespace oasys 00105 00106 #endif /* _OASYS_NOTIFIER_H_ */