semmutex-posix.cpp revision f0dd841cb99154da8ec0a31cae2f89044895a23f
/* $Id$ */
/** @file
* IPRT - Mutex Semaphore, POSIX.
*/
/*
* Copyright (C) 2006-2007 Sun Microsystems, Inc.
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 USA or visit http://www.sun.com if you need
* additional information or have any questions.
*/
/*******************************************************************************
* Header Files *
*******************************************************************************/
#include <iprt/semaphore.h>
#include <iprt/lockvalidator.h>
#include <errno.h>
#include <pthread.h>
#include <unistd.h>
/*******************************************************************************
* Structures and Typedefs *
*******************************************************************************/
/** Posix internal representation of a Mutex semaphore. */
struct RTSEMMUTEXINTERNAL
{
/** pthread mutex. */
/** The owner of the mutex. */
/** Nesting count. */
/** Magic value (RTSEMMUTEX_MAGIC). */
#ifdef RTSEMMUTEX_STRICT
/** Lock validator record associated with this mutex. */
#endif
};
/* Undefine debug mappings. */
{
int rc;
/*
* Allocate semaphore handle.
*/
struct RTSEMMUTEXINTERNAL *pThis = (struct RTSEMMUTEXINTERNAL *)RTMemAlloc(sizeof(struct RTSEMMUTEXINTERNAL));
if (pThis)
{
/*
* Create the semaphore.
*/
if (!rc)
{
if (!rc)
{
#ifdef RTSEMMUTEX_STRICT
RTLockValidatorInit(&pThis->ValidatorRec, NIL_RTLOCKVALIDATORCLASS, RTLOCKVALIDATOR_SUB_CLASS_NONE, NULL, pThis);
#endif
return VINF_SUCCESS;
}
}
}
else
rc = VERR_NO_MEMORY;
return rc;
}
{
/*
* Validate input.
*/
if (MutexSem == NIL_RTSEMMUTEX)
return VINF_SUCCESS;
/*
* Try destroy it.
*/
if (rc)
{
return RTErrConvertFromErrno(rc);
}
/*
* Free the memory and be gone.
*/
#ifdef RTSEMMUTEX_STRICT
#endif
return VINF_SUCCESS;
}
DECL_FORCE_INLINE(int) rtSemMutexRequest(RTSEMMUTEX MutexSem, unsigned cMillies, RTSEMMUTEX_STRICT_POS_DECL)
{
/*
* Validate input.
*/
#ifdef RTSEMMUTEX_STRICT
#endif
/*
* Check if nested request.
*/
{
return VINF_SUCCESS;
}
#ifndef RTSEMMUTEX_STRICT
#endif
/*
* Lock it.
*/
if (cMillies == RT_INDEFINITE_WAIT)
{
/* take mutex */
if (rc)
{
return RTErrConvertFromErrno(rc);
}
}
else
{
#ifdef RT_OS_DARWIN
AssertMsgFailed(("Not implemented on Darwin yet because of incomplete pthreads API."));
return VERR_NOT_IMPLEMENTED;
#else /* !RT_OS_DARWIN */
/*
* Get current time and calc end of wait time.
*/
if (cMillies != 0)
{
{
}
}
/* take mutex */
if (rc)
{
return RTErrConvertFromErrno(rc);
}
#endif /* !RT_OS_DARWIN */
}
/*
* Set the owner and nesting.
*/
#ifdef RTSEMMUTEX_STRICT
RTLockValidatorWriteLockInc(RTLockValidatorSetOwner(&pThis->ValidatorRec, hThreadSelf, RTSEMMUTEX_STRICT_POS_ARGS));
#endif
return VINF_SUCCESS;
}
{
#ifndef RTSEMMUTEX_STRICT
#else
#endif
}
RTDECL(int) RTSemMutexRequestDebug(RTSEMMUTEX MutexSem, unsigned cMillies, RTHCUINTPTR uId, RT_SRC_POS_DECL)
{
#ifdef RTSEMMUTEX_STRICT
#else
#endif
}
{
/* EINTR isn't returned by the wait functions we're using. */
#ifndef RTSEMMUTEX_STRICT
#else
#endif
}
RTDECL(int) RTSemMutexRequestNoResumeDebug(RTSEMMUTEX MutexSem, unsigned cMillies, RTHCUINTPTR uId, RT_SRC_POS_DECL)
{
/* EINTR isn't returned by the wait functions we're using. */
#ifdef RTSEMMUTEX_STRICT
#else
#endif
}
{
/*
* Validate input.
*/
/*
* Check if nested.
*/
{
AssertMsgFailed(("Not owner of mutex %p!! Self=%08x Owner=%08x cNesting=%d\n",
return VERR_NOT_OWNER;
}
/*
* If nested we'll just pop a nesting.
*/
{
return VINF_SUCCESS;
}
/*
* Clear the state. (cNesting == 1)
*/
#ifdef RTSEMMUTEX_STRICT
#endif
/*
* Unlock mutex semaphore.
*/
if (RT_UNLIKELY(rc))
{
return RTErrConvertFromErrno(rc);
}
return VINF_SUCCESS;
}