Program Listing for File event.cpp

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/* event.cpp */
/*
 * Copyright information and license terms for this software can be
 * found in the file LICENSE that is included with the distribution
 */
#include <cstddef>
#include <cstdlib>
#include <cstddef>
#include <string>
#include <cstdio>
#include <stdexcept>

#include <memory>
#include <vector>
#include <epicsThread.h>
#include <epicsMutex.h>
#include <epicsEvent.h>

#define epicsExportSharedSymbols
#include <pv/noDefaultMethods.h>
#include <pv/pvType.h>
#include <pv/lock.h>
#include <pv/event.h>

using std::string;

namespace epics { namespace pvData {


Event::~Event() {
    epicsEventDestroy(id);
    id = 0;
}


Event::Event(bool full)
: id(epicsEventCreate(full?epicsEventFull : epicsEventEmpty))
{
}

void Event::signal()
{
    if(id==0) throw std::logic_error(string("event was deleted"));
    epicsEventSignal(id);
}

bool Event::wait ()
{
    if(id==0) throw std::logic_error(string("event was deleted"));
    epicsEventWaitStatus status = epicsEventWait(id);
    return status==epicsEventWaitOK ? true : false;
}

bool Event::wait ( double timeOut )
{
    if(id==0) throw std::logic_error(string("event was deleted"));
    epicsEventWaitStatus status = epicsEventWaitWithTimeout(id,timeOut);
    return status==epicsEventWaitOK ? true : false;
}

bool Event::tryWait ()
{
    if(id==0) throw std::logic_error(string("event was deleted"));
    epicsEventWaitStatus status = epicsEventTryWait(id);
    return status==epicsEventWaitOK ? true : false;
}

}}