00001 /* 00002 * IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING. By 00003 * downloading, copying, installing or using the software you agree to 00004 * this license. If you do not agree to this license, do not download, 00005 * install, copy or use the software. 00006 * 00007 * Intel Open Source License 00008 * 00009 * Copyright (c) 2006 Intel Corporation. All rights reserved. 00010 * 00011 * Redistribution and use in source and binary forms, with or without 00012 * modification, are permitted provided that the following conditions are 00013 * met: 00014 * 00015 * Redistributions of source code must retain the above copyright 00016 * notice, this list of conditions and the following disclaimer. 00017 * 00018 * Redistributions in binary form must reproduce the above copyright 00019 * notice, this list of conditions and the following disclaimer in the 00020 * documentation and/or other materials provided with the distribution. 00021 * 00022 * Neither the name of the Intel Corporation nor the names of its 00023 * contributors may be used to endorse or promote products derived from 00024 * this software without specific prior written permission. 00025 * 00026 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 00027 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 00028 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 00029 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE INTEL OR 00030 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 00031 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 00032 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 00033 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 00034 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 00035 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 00036 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00037 */ 00038 00039 #ifndef _OASYS_ONOFFNOTIFIER_H_ 00040 #define _OASYS_ONOFFNOTIFIER_H_ 00041 00042 #include "SpinLock.h" 00043 #include "../debug/Log.h" 00044 #include "../debug/Logger.h" 00045 00046 namespace oasys { 00047 00048 class Lock; 00049 00059 class OnOffNotifier : public Logger { 00060 public: 00065 OnOffNotifier(const char* logpath = 0, bool keep_quiet = true); 00066 00070 ~OnOffNotifier(); 00071 00085 bool wait(Lock* lock = 0, int timeout = -1); 00086 00092 void signal(); 00093 00097 void clear(); 00098 00102 int read_fd() { return pipe_[0]; } 00103 00104 protected: 00105 bool waiter_; // for debugging only 00106 bool quiet_; // no logging 00107 00108 SpinLock notifier_lock_; 00109 bool active_; 00110 int pipe_[2]; 00111 }; 00112 00113 } // namespace oasys 00114 00115 #endif /* _OASYS_ONOFFNOTIFIER_H_ */