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ocl150a.zip
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OCL
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ONSem.hpp
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1996-08-12
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// OCL - OS/2 Class Library
// (c) Cubus 1995
// All Rights Reserved
// ONSem.hpp
// Named Semaphores
/*
* 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/Include/rcs/ONSem.hpp 1.50 1996/08/11 23:47:24 B.STEIN Release $
#ifndef ONSEM_INCLUDED
#define ONSEM_INCLUDED
#ifndef OSTRING_INCLUDED
#include <OString.hpp>
#endif
#ifndef OVIOEXCEPTION_INCLUDED
#include <OVioException.hpp>
#endif
typedef class ONSem *pONSem;
class __CPP_EXPORT__ ONSem
: public OCLObject
{
private:
OString semName;
HEV sema;
ULONG semState;
public:
enum ONSemStates {
indefinite = SEM_INDEFINITE_WAIT,
immediate = SEM_IMMEDIATE_RETURN
};
enum ONSemCtorActions
{
create = 0, // constructor should try to create the semaphore
open // constructor should try to open the semaphore
};
// construct from an existing semaphore
ONSem (HEV handle) throw (OVioException&);
ONSem (PCSZ name = NULL,
ULONG action = ONSem::create,
BOOL initialState = FALSE) throw (OVioException&);
virtual
~ONSem ();
virtual
PSZ isOfType () const;
BOOL
waitSem (const ULONG timeout = ONSem::indefinite),
postSem (), // post the semaphore
closeSem (), // close the semaphore
openSem (PCSZ name), // open existing semaphore by name
openSem (const HEV aSem); // open existing semaphore by handle
ULONG
resetSem (), // reset semaphore, returns postCount since last reset
querySem (); // query semaphore, returns postCount
void
setSemHandle (HEV hev);
HEV
getSemHandle (); // retrieve sema
};
#endif // ONSEM_INCLUDED
// end of source