102 lines
2.5 KiB
C++
102 lines
2.5 KiB
C++
/*
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* Copyright 2003,2004 The Apache Software Foundation.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef _LOG4CXX_HELPERS_EVENT_H
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#define _LOG4CXX_HELPERS_EVENT_H
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#include <log4cxx/config.h>
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#include <log4cxx/helpers/exception.h>
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#ifdef HAVE_PTHREAD
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#include <pthread.h>
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#endif
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namespace log4cxx
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{
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namespace helpers
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{
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class LOG4CXX_EXPORT EventException : public Exception
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{
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public:
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EventException(const String& message) : Exception(message)
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{
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}
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};
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/**
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Object to be used to synchronize threads
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An event is signalled with set(). If the new event is
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a manual reset event, it remains signalled until it is reset
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with reset(). An auto reset event remains signalled until a
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single thread has waited for it, at which time the event handle is
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automatically reset to unsignalled.
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*/
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class LOG4CXX_EXPORT Event
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{
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public:
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/**
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Creates a new event
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@param manualReset Specifies whether the new event has manual or auto
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reset behaviour.
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@param initialState Specifies whether the new event handle is initially
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signalled or not
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*/
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Event(bool manualReset, bool initialState);
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/**
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Destroy the event
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*/
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~Event();
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/**
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Sets the event to the signalled state.
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If the event is a manual reset event, it remains signalled until it
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is reset with Reset(). An auto reset event remains signalled
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until a single thread has waited for it, at which time the event is
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automatically reset to unsignalled.
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*/
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void set();
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/**
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Resets the event to the unsignalled state
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*/
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void reset();
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/**
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Wait for the event to be set
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This method immediatly returns if the event is already set
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*/
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void wait();
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protected:
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#ifdef HAVE_PTHREAD
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pthread_cond_t condition;
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pthread_mutex_t mutex;
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bool state;
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bool manualReset;
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#elif defined(HAVE_MS_THREAD)
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void * event;
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#endif
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}; // class Event
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} // namespace helpers
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}; // namespace log4cx
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#endif //_LOG4CXX_HELPERS_EVENT_H
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