semevent-r0drv-freebsd.c revision 9837b5326a44772e824a15f2d5d937ddfd627d54
/* $Id$ */
/** @file
* IPRT - Single Release Event 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,
* 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/lockvalidator.h>
#include "sleepqueue-r0drv-freebsd.h"
/*******************************************************************************
* Structures and Typedefs *
*******************************************************************************/
/**
* FreeBSD event semaphore.
*/
typedef struct RTSEMEVENTINTERNAL
{
/** Magic value (RTSEMEVENT_MAGIC). */
/** The object status - !0 when signaled and 0 when reset. */
/** Reference counter. */
{
}
RTDECL(int) RTSemEventCreateEx(PRTSEMEVENT phEventSem, uint32_t fFlags, RTLOCKVALCLASS hClass, const char *pszNameFmt, ...)
{
AssertCompile(sizeof(RTSEMEVENTINTERNAL) > sizeof(void *));
AssertReturn(!(fFlags & ~(RTSEMEVENT_FLAGS_NO_LOCK_VAL | RTSEMEVENT_FLAGS_BOOTSTRAP_HACK)), VERR_INVALID_PARAMETER);
if (!pThis)
return VERR_NO_MEMORY;
*phEventSem = pThis;
return VINF_SUCCESS;
}
/**
* Retains a reference to the event semaphore.
*
* @param pThis The event semaphore.
*/
{
}
/**
* Releases a reference to the event semaphore.
*
* @param pThis The event semaphore.
*/
{
}
{
/*
* Validate input.
*/
if (pThis == NIL_RTSEMEVENT)
return VINF_SUCCESS;
AssertMsgReturn(pThis->u32Magic == RTSEMEVENT_MAGIC, ("pThis->u32Magic=%RX32 pThis=%p\n", pThis->u32Magic, pThis), VERR_INVALID_HANDLE);
/*
* Invalidate it and signal the object just in case.
*/
return VINF_SUCCESS;
}
{
/*
* Validate input.
*/
AssertMsgReturn(pThis->u32Magic == RTSEMEVENT_MAGIC, ("pThis->u32Magic=%RX32 pThis=%p\n", pThis->u32Magic, pThis), VERR_INVALID_HANDLE);
/*
* Signal the event object.
*/
return VINF_SUCCESS;
}
/**
* Worker for RTSemEventWaitEx and RTSemEventWaitExDebug.
*
* @returns VBox status code.
* @param pThis The event semaphore.
* @param fFlags See RTSemEventWaitEx.
* @param uTimeout See RTSemEventWaitEx.
* @param pSrcPos The source code position of the wait.
*/
{
int rc;
/*
* Validate the input.
*/
AssertMsgReturn(pThis->u32Magic == RTSEMEVENT_MAGIC, ("%p u32Magic=%RX32\n", pThis, pThis->u32Magic), VERR_INVALID_PARAMETER);
/*
* Try grab the event without setting up the wait.
*/
rc = VINF_SUCCESS;
else
{
/*
* We have to wait.
*/
if (RT_SUCCESS(rc))
{
for (;;)
{
/* The destruction test. */
else
{
/* Check the exit conditions. */
rc = VINF_SUCCESS;
else if (rtR0SemBsdWaitHasTimedOut(&Wait))
rc = VERR_TIMEOUT;
else if (rtR0SemBsdWaitWasInterrupted(&Wait))
else
{
/* Do the wait and then recheck the conditions. */
continue;
}
}
break;
}
}
}
return rc;
}
{
#ifndef RTSEMEVENT_STRICT
#else
#endif
}
{
}
{
return 1000000000 / hz;
}