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ONSem.cpp
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1996-08-12
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// OCL - OS/2 Class Library
// (c) Cubus 1995
// All Rights Reserved
// ONSem.cpp
// Named Semaphores
// class member functions
/*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Neither the name Cubus nor the name Team OCL may be used to
* endorse or promote products derived from this software
* without specific prior written permission.
* 3. See OCL.INF for a detailed copyright notice.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
// $Header: W:/Projects/OCL/Source/rcs/ONSem.cpp 1.50 1996/08/11 23:49:25 B.STEIN Release $
#define __OCL_SOURCE__
#define OINCL_OSTRING
#define OINCL_BASE
#include <ocl.hpp>
#include <ONSem.hpp>
#include <OMessage.hpp>
ONSem::ONSem(HEV handle) throw (OVioException&)
: sema(handle),
semState(0)
{
if (!openSem(sema))
throw OVioException(OCL::apierror(125, semState), semState);
}
ONSem::ONSem(PCSZ name, ULONG action, BOOL initialState) throw (OVioException&)
: sema((HEV)NULL),
semState(0),
semName((PSZ)name)
{
switch(action)
{
case ONSem::create: {
if((semState = DosCreateEventSem(semName, &sema, 0, initialState)) != 0)
throw OVioException(OCL::apierror(126, semState), semState);
break; }
case ONSem::open:
if (!openSem(name))
throw OVioException(OCL::apierror(127, semState), semState);
if (initialState)
postSem();
break;
}
}
ONSem::~ONSem()
{
if (sema) closeSem();
}
PSZ ONSem::isOfType() const
{
return("ONSem");
}
void ONSem::setSemHandle(HEV hev)
{
sema = hev;
}
HEV ONSem::getSemHandle()
{
return(sema);
}
BOOL ONSem::waitSem(const ULONG timeout)
{
semState = DosWaitEventSem(sema, timeout);
return(semState == 0);
}
BOOL ONSem::postSem()
{
semState = DosPostEventSem(sema);
return(semState == 0);
}
BOOL ONSem::closeSem()
{
semState = DosCloseEventSem(sema);
sema = (HEV)NULL;
return(semState == 0);
}
BOOL ONSem::openSem(PCSZ name)
{
if (!name) {
semState = ERROR_INVALID_NAME;
return(FALSE); }
else {
sema = (HEV) NULL;
semName << (PSZ) name;
semState = DosOpenEventSem(semName, &sema); }
return(semState == 0);
}
BOOL ONSem::openSem(const HEV aSem)
{
sema = aSem;
semName << (PSZ) NULL;
semState = DosOpenEventSem(semName, &sema);
return(semState == 0);
}
ULONG ONSem::resetSem()
{
ULONG postCount = 0;
semState = DosResetEventSem(sema, &postCount);
return(postCount);
}
ULONG ONSem::querySem()
{
ULONG postCount = 0;
semState = DosQueryEventSem(sema, &postCount);
return(postCount);
}
// end of source