100 lines
2.4 KiB
C++
100 lines
2.4 KiB
C++
/*************************************************************************\
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* Copyright (c) 2002 The University of Chicago, as Operator of Argonne
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* National Laboratory.
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* Copyright (c) 2002 The Regents of the University of California, as
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* Operator of Los Alamos National Laboratory.
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* EPICS BASE Versions 3.13.7
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* and higher are distributed subject to a Software License Agreement found
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* in file LICENSE that is included with this distribution.
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\*************************************************************************/
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/* epicsMutex.c */
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/* Author: Jeff Hill */
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#include <new>
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#include <exception>
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#define epicsExportSharedSymbols
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#include "epicsEvent.h"
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#include "epicsStdioRedirect.h"
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/*
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* exception payload
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*/
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class epicsEvent::invalidSemaphore : public std::exception
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{
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const char * what () const;
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};
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const char * epicsEvent::invalidSemaphore:: what () const
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{
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return "epicsEvent::invalidSemaphore()";
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}
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//
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// Its probably preferable to not make these inline because they are in
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// the sharable library interface. The use of inline or not here is probably
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// not an issue because all of this ends up in the operating system in system
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// calls
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//
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epicsEvent::epicsEvent ( epicsEventInitialState initial ) :
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id ( epicsEventCreate ( initial ) )
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{
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if ( this->id == 0 ) {
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throw std::bad_alloc ();
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}
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}
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epicsEvent::~epicsEvent ()
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{
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epicsEventDestroy ( this->id );
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}
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void epicsEvent::signal ()
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{
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epicsEventSignal ( this->id );
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}
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void epicsEvent::wait ()
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{
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epicsEventWaitStatus status;
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status = epicsEventWait (this->id);
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if (status!=epicsEventWaitOK) {
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throwWithLocation ( invalidSemaphore () );
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}
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}
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bool epicsEvent::wait (double timeOut)
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{
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epicsEventWaitStatus status;
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status = epicsEventWaitWithTimeout (this->id, timeOut);
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if (status==epicsEventWaitOK) {
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return true;
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} else if (status==epicsEventWaitTimeout) {
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return false;
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} else {
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throwWithLocation ( invalidSemaphore () );
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}
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return false;
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}
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bool epicsEvent::tryWait ()
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{
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epicsEventWaitStatus status;
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status = epicsEventTryWait (this->id);
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if (status==epicsEventWaitOK) {
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return true;
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} else if (status==epicsEventWaitTimeout) {
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return false;
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} else {
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throwWithLocation ( invalidSemaphore () );
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}
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return false;
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}
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void epicsEvent::show ( unsigned level ) const
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{
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epicsEventShow ( this->id, level );
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}
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