/* $Id$ */
/** @file
* IPRT - Single Release Event Semaphores, Ring-0 Driver, NT.
*/
/*
* Copyright (C) 2006-2011 Oracle Corporation
*
* 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.
*/
/*******************************************************************************
* Header Files *
*******************************************************************************/
#define RTSEMEVENT_WITHOUT_REMAPPING
#include "the-nt-kernel.h"
#include <iprt/semaphore.h>
#include <iprt/lockvalidator.h>
/*******************************************************************************
* Structures and Typedefs *
*******************************************************************************/
/**
* NT event semaphore.
*/
typedef struct RTSEMEVENTINTERNAL
{
/** Magic value (RTSEMEVENT_MAGIC). */
/** Reference counter. */
/** The NT Event object. */
{
}
RTDECL(int) RTSemEventCreateEx(PRTSEMEVENT phEventSem, uint32_t fFlags, RTLOCKVALCLASS hClass, const char *pszNameFmt, ...)
{
AssertReturn(!(fFlags & ~(RTSEMEVENT_FLAGS_NO_LOCK_VAL | RTSEMEVENT_FLAGS_BOOTSTRAP_HACK)), VERR_INVALID_PARAMETER);
AssertCompile(sizeof(RTSEMEVENTINTERNAL) > sizeof(void *));
if (pThis)
{
*phEventSem = pThis;
return VINF_SUCCESS;
}
return VERR_NO_MEMORY;
}
/**
* Retains a reference to the semaphore.
*
* @param pThis The semaphore to retain.
*/
{
}
/**
* Releases a reference to the semaphore.
*
* @param pThis The semaphore to release
*/
{
}
{
/*
* 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.
*/
{
/*
* Validate input.
*/
if (!pThis)
return VERR_INVALID_PARAMETER;
AssertMsgReturn(pThis->u32Magic == RTSEMEVENT_MAGIC, ("%p u32Magic=%RX32\n", pThis, pThis->u32Magic), VERR_INVALID_PARAMETER);
/*
* Convert the timeout to a relative one because KeWaitForSingleObject
* takes system time instead of interrupt time as input for absolute
* timeout specifications. So, we're best of by giving it relative time.
*
* Lazy bird converts uTimeout to relative nanoseconds and then to Nt time.
*/
if (!(fFlags & RTSEMWAIT_FLAGS_INDEFINITE))
{
if (fFlags & RTSEMWAIT_FLAGS_MILLISECS)
: UINT64_MAX;
if (uTimeout == UINT64_MAX)
else
{
if (fFlags & RTSEMWAIT_FLAGS_ABSOLUTE)
{
: 0;
}
}
}
/*
* Wait for it.
* We're assuming interruptible waits should happen at UserMode level.
*/
if (fFlags & RTSEMWAIT_FLAGS_INDEFINITE)
else
{
}
int rc;
{
switch (rcNt)
{
case STATUS_SUCCESS:
rc = VINF_SUCCESS;
break;
case STATUS_ALERTED:
break;
case STATUS_USER_APC:
break;
case STATUS_TIMEOUT:
rc = VERR_TIMEOUT;
break;
default:
AssertMsgFailed(("pThis->u32Magic=%RX32 pThis=%p: wait returned %lx!\n",
break;
}
}
else
return rc;
}
{
#ifndef RTSEMEVENT_STRICT
#else
#endif
}
{
}
{
return RTTimerGetSystemGranularity();
}