semfastmutex-r0drv-freebsd.c revision 1f1986470af9f0bb750dd859b142dc2e952deb20
/* $Id$ */
/** @file
* innotek Portable Runtime - Fast Mutex Semaphores, Ring-0 Driver, FreeBSD.
*/
/*
* Copyright (c) 2007 knut st. osmundsen <bird-src-spam@anduin.net>
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
/*******************************************************************************
* Header Files *
*******************************************************************************/
#include "the-freebsd-kernel.h"
#include <iprt/semaphore.h>
#include <iprt/err.h>
#include <iprt/alloc.h>
#include <iprt/assert.h>
#include <iprt/asm.h>
#include "internal/magics.h"
/*******************************************************************************
* Structures and Typedefs *
*******************************************************************************/
/**
* Wrapper for the FreeBSD (sleep) mutex.
*/
typedef struct RTSEMFASTMUTEXINTERNAL
{
/** Magic value (RTSEMFASTMUTEX_MAGIC). */
uint32_t u32Magic;
/** The FreeBSD (sleep) mutex. */
struct mtx Mtx;
} RTSEMFASTMUTEXINTERNAL, *PRTSEMFASTMUTEXINTERNAL;
RTDECL(int) RTSemFastMutexCreate(PRTSEMFASTMUTEX pMutexSem)
{
AssertCompile(sizeof(RTSEMFASTMUTEXINTERNAL) > sizeof(void *));
AssertPtrReturn(pMutexSem, VERR_INVALID_POINTER);
PRTSEMFASTMUTEXINTERNAL pFastInt = (PRTSEMFASTMUTEXINTERNAL)RTMemAlloc(sizeof(*pFastInt));
if (pFastInt)
{
pFastInt->u32Magic = RTSEMFASTMUTEX_MAGIC;
mtx_init(&pFastInt->Mtx, "IPRT Fast Mutex Semaphore", NULL, MTX_DEF | MTX_RECURSE);
*pMutexSem = pFastInt;
return VINF_SUCCESS;
}
return VERR_NO_MEMORY;
}
RTDECL(int) RTSemFastMutexDestroy(RTSEMFASTMUTEX MutexSem)
{
if (MutexSem == NIL_RTSEMFASTMUTEX) /* don't bitch */
return VERR_INVALID_PARAMETER;
PRTSEMFASTMUTEXINTERNAL pFastInt = (PRTSEMFASTMUTEXINTERNAL)MutexSem;
AssertPtrReturn(pFastInt, VERR_INVALID_PARAMETER);
AssertMsgReturn(pFastInt->u32Magic == RTSEMFASTMUTEX_MAGIC,
("pFastInt->u32Magic=%RX32 pFastInt=%p\n", pFastInt->u32Magic, pFastInt),
VERR_INVALID_PARAMETER);
ASMAtomicXchgU32(&pFastInt->u32Magic, RTSEMFASTMUTEX_MAGIC_DEAD);
mtx_destroy(&pFastInt->Mtx);
RTMemFree(pFastInt);
return VINF_SUCCESS;
}
RTDECL(int) RTSemFastMutexRequest(RTSEMFASTMUTEX MutexSem)
{
PRTSEMFASTMUTEXINTERNAL pFastInt = (PRTSEMFASTMUTEXINTERNAL)MutexSem;
AssertPtrReturn(pFastInt, VERR_INVALID_PARAMETER);
AssertMsgReturn(pFastInt->u32Magic == RTSEMFASTMUTEX_MAGIC,
("pFastInt->u32Magic=%RX32 pFastInt=%p\n", pFastInt->u32Magic, pFastInt),
VERR_INVALID_PARAMETER);
mtx_lock(&pFastInt->Mtx);
return VINF_SUCCESS;
}
RTDECL(int) RTSemFastMutexRelease(RTSEMFASTMUTEX MutexSem)
{
PRTSEMFASTMUTEXINTERNAL pFastInt = (PRTSEMFASTMUTEXINTERNAL)MutexSem;
AssertPtrReturn(pFastInt, VERR_INVALID_PARAMETER);
AssertMsgReturn(pFastInt->u32Magic == RTSEMFASTMUTEX_MAGIC,
("pFastInt->u32Magic=%RX32 pFastInt=%p\n", pFastInt->u32Magic, pFastInt),
VERR_INVALID_PARAMETER);
mtx_unlock(&pFastInt->Mtx);
return VINF_SUCCESS;
}