semeventmulti-r0drv-solaris.c revision cbd4e5863be36b70c59ebeb02a611a763f9d58f1
/* $Id$ */
/** @file
* IPRT - Multiple Release Event Semaphores, Ring-0 Driver, Solaris.
*/
/*
* Copyright (C) 2006-2007 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 *
*******************************************************************************/
#include "the-solaris-kernel.h"
#include <iprt/semaphore.h>
#if defined(RT_ARCH_AMD64) || defined(RT_ARCH_X86)
# include <iprt/asm-amd64-x86.h>
#endif
/*******************************************************************************
* Structures and Typedefs *
*******************************************************************************/
/**
* FreeBSD multiple release event semaphore.
*/
typedef struct RTSEMEVENTMULTIINTERNAL
{
/** Magic value (RTSEMEVENTMULTI_MAGIC). */
/** The number of waiting threads. */
/** Set if the event object is signaled. */
/** The number of threads in the process of waking up. */
/** The Solaris mutex protecting this structure and pairing up the with the cv. */
/** The Solaris condition variable. */
{
}
RTDECL(int) RTSemEventMultiCreateEx(PRTSEMEVENTMULTI phEventMultiSem, uint32_t fFlags, RTLOCKVALCLASS hClass,
const char *pszNameFmt, ...)
{
AssertCompile(sizeof(RTSEMEVENTMULTIINTERNAL) > sizeof(void *));
if (pThis)
{
mutex_init(&pThis->Mtx, "IPRT Multiple Release Event Semaphore", MUTEX_DRIVER, (void *)ipltospl(DISP_LEVEL));
*phEventMultiSem = pThis;
return VINF_SUCCESS;
}
return VERR_NO_MEMORY;
}
{
if (pThis == NIL_RTSEMEVENTMULTI)
return VINF_SUCCESS;
AssertMsgReturn(pThis->u32Magic == RTSEMEVENTMULTI_MAGIC, ("pThis=%p u32Magic=%#x\n", pThis, pThis->u32Magic), VERR_INVALID_HANDLE);
{
/* abort waiting thread, last man cleans up. */
}
/* the last waking thread is gonna do the cleanup */
else
{
}
return VINF_SUCCESS;
}
{
/*
* If we're in interrupt context we need to unpin the underlying current
* thread as this could lead to a deadlock (see #4259 for the full explanation)
*
* Note! See remarks about preemption in RTSemEventSignal.
*/
if (!fAcquired)
{
{
preempt();
}
}
{
}
return VINF_SUCCESS;
}
{
/*
* If we're in interrupt context we need to unpin the underlying current
* thread as this could lead to a deadlock (see #4259 for the full explanation)
*
* Note! See remarks about preemption in RTSemEventSignal.
*/
if (!fAcquired)
{
{
preempt();
}
}
return VINF_SUCCESS;
}
static int rtSemEventMultiWait(RTSEMEVENTMULTI hEventMultiSem, RTMSINTERVAL cMillies, bool fInterruptible)
{
int rc;
if (cMillies)
rc = VINF_SUCCESS;
else if (!cMillies)
rc = VERR_TIMEOUT;
else
{
/*
* Translate milliseconds into ticks and go to sleep.
*/
if (cMillies != RT_INDEFINITE_WAIT)
{
if (fInterruptible)
else
}
else
{
if (fInterruptible)
else
{
rc = 1;
}
}
if (rc > 0)
{
/* Retured due to call to cv_signal() or cv_broadcast() */
{
rc = VINF_SUCCESS;
}
else
{
{
return rc;
}
}
}
else if (rc == -1)
{
/* Returned due to timeout being reached */
rc = VERR_TIMEOUT;
}
else
{
/* Returned due to pending signal */
}
}
return rc;
}
{
}
{
}