semaphore-r0drv-darwin.cpp revision 8c99dcd207cf5b7bee01f95fbe19728a94076f94
/* $Id$ */
/** @file
* IPRT - Semaphores, Ring-0 Driver, Darwin.
*/
/*
* 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 "the-darwin-kernel.h"
#include <iprt/semaphore.h>
/*******************************************************************************
* Structures and Typedefs *
*******************************************************************************/
/**
* Darwin event semaphore.
*/
typedef struct RTSEMEVENTINTERNAL
{
/** Magic value (RTSEMEVENT_MAGIC). */
/** The number of waiting threads. */
/** Set if the event object is signaled. */
/** The number of threads in the process of waking up. */
/** The spinlock protecting us. */
/**
* Darwin 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 spinlock protecting us. */
#if 0 /** @todo */
/**
* Darwin mutex semaphore.
*/
typedef struct RTSEMMUTEXINTERNAL
{
/** Magic value (RTSEMMUTEX_MAGIC). */
/** The mutex. */
#endif
/**
* Wrapper for the darwin semaphore structure.
*/
typedef struct RTSEMFASTMUTEXINTERNAL
{
/** Magic value (RTSEMFASTMUTEX_MAGIC). */
/** The mutex. */
{
Assert(sizeof(RTSEMEVENTINTERNAL) > sizeof(void *));
if (pEventInt)
{
{
return VINF_SUCCESS;
}
}
return VERR_NO_MEMORY;
}
{
return VERR_INVALID_HANDLE;
{
/* abort waiting thread, last man cleans up. */
}
/* the last waking thread is gonna do the cleanup */
else
{
}
return VINF_SUCCESS;
}
{
/** @todo should probably disable interrupts here... update
* semspinmutex-r0drv-generic.c when done. */
{
/** @todo this isn't safe. a scheduling interrupt on the other cpu while we're in here
* could cause the thread to be timed out before we manage to wake it up and the event
* ends up in the wrong state. ditto for posix signals.
* Update: check the return code; it will return KERN_NOT_WAITING if no one is around. */
}
else
return VINF_SUCCESS;
}
{
int rc;
{
rc = VINF_SUCCESS;
}
else
{
if (cMillies == RT_INDEFINITE_WAIT)
rcWait = lck_spin_sleep(pEventInt->pSpinlock, LCK_SLEEP_DEFAULT, (event_t)pEventInt, fInterruptible);
else
{
u64AbsTime += mach_absolute_time();
}
switch (rcWait)
{
case THREAD_AWAKENED:
{
/* the event was destroyed after we woke up, as the last thread do the cleanup. */
return VINF_SUCCESS;
}
rc = VINF_SUCCESS;
break;
case THREAD_TIMED_OUT:
rc = VERR_TIMEOUT;
break;
case THREAD_INTERRUPTED:
break;
case THREAD_RESTART:
/* Last one out does the cleanup. */
{
return VERR_SEM_DESTROYED;
}
break;
default:
break;
}
}
return rc;
}
{
}
{
}
{
Assert(sizeof(RTSEMEVENTMULTIINTERNAL) > sizeof(void *));
PRTSEMEVENTMULTIINTERNAL pEventMultiInt = (PRTSEMEVENTMULTIINTERNAL)RTMemAlloc(sizeof(*pEventMultiInt));
if (pEventMultiInt)
{
pEventMultiInt->cWaiters = 0;
pEventMultiInt->cWaking = 0;
pEventMultiInt->fSignaled = 0;
if (pEventMultiInt->pSpinlock)
{
return VINF_SUCCESS;
}
pEventMultiInt->u32Magic = 0;
}
return VERR_NO_MEMORY;
}
{
return VERR_INVALID_HANDLE;
if (pEventMultiInt->cWaiters > 0)
{
/* abort waiting thread, last man cleans up. */
}
else if (pEventMultiInt->cWaking)
/* the last waking thread is gonna do the cleanup */
else
{
}
return VINF_SUCCESS;
}
{
if (pEventMultiInt->cWaiters > 0)
{
}
return VINF_SUCCESS;
}
{
return VINF_SUCCESS;
}
static int rtSemEventMultiWait(RTSEMEVENTMULTI EventMultiSem, unsigned cMillies, wait_interrupt_t fInterruptible)
{
int rc;
if (pEventMultiInt->fSignaled)
rc = VINF_SUCCESS;
else
{
if (cMillies == RT_INDEFINITE_WAIT)
rcWait = lck_spin_sleep(pEventMultiInt->pSpinlock, LCK_SLEEP_DEFAULT, (event_t)pEventMultiInt, fInterruptible);
else
{
u64AbsTime += mach_absolute_time();
}
switch (rcWait)
{
case THREAD_AWAKENED:
{
/* the event was destroyed after we woke up, as the last thread do the cleanup. */
return VINF_SUCCESS;
}
rc = VINF_SUCCESS;
break;
case THREAD_TIMED_OUT:
rc = VERR_TIMEOUT;
break;
case THREAD_INTERRUPTED:
break;
case THREAD_RESTART:
/* Last one out does the cleanup. */
{
return VERR_SEM_DESTROYED;
}
break;
default:
break;
}
}
return rc;
}
{
}
{
}
#if 0 /* need proper timeout lock function! */
{
AssertCompile(sizeof(RTSEMMUTEXINTERNAL) > sizeof(void *));
if (pMutexInt)
{
{
return VINF_SUCCESS;
}
}
return VERR_NO_MEMORY;
}
{
/*
* Validate input.
*/
if (!pMutexInt)
return VERR_INVALID_PARAMETER;
/*
* Invalidate it and signal the object just in case.
*/
return VINF_SUCCESS;
}
{
/*
* Validate input.
*/
if (!pMutexInt)
return VERR_INVALID_PARAMETER;
/*
* Get the mutex.
*/
#if 1
#else
if (cMillies == RT_INDEFINITE_WAIT)
else
{
}
switch (rcNt)
{
case STATUS_SUCCESS:
return VINF_SUCCESS;
return VERR_SEM_DESTROYED;
case STATUS_ALERTED:
return VERR_INTERRUPTED; /** @todo VERR_INTERRUPTED isn't correct anylonger. please fix r0drv stuff! */
case STATUS_USER_APC:
return VERR_INTERRUPTED; /** @todo VERR_INTERRUPTED isn't correct anylonger. please fix r0drv stuff! */
case STATUS_TIMEOUT:
return VERR_TIMEOUT;
default:
AssertMsgFailed(("pMutexInt->u32Magic=%RX32 pMutexInt=%p: wait returned %lx!\n",
return VERR_INTERNAL_ERROR;
}
#endif
return VINF_SUCCESS;
}
{
/*
* Validate input.
*/
if (!pMutexInt)
return VERR_INVALID_PARAMETER;
if ( !pMutexInt
{
AssertMsgFailed(("pMutexInt->u32Magic=%RX32 pMutexInt=%p\n", pMutexInt ? pMutexInt->u32Magic : 0, pMutexInt));
return VERR_INVALID_PARAMETER;
}
/*
* Release the mutex.
*/
#ifdef RT_USE_FAST_MUTEX
#else
#endif
return VINF_SUCCESS;
}
#endif /* later */
{
AssertCompile(sizeof(RTSEMFASTMUTEXINTERNAL) > sizeof(void *));
if (pFastInt)
{
{
return VINF_SUCCESS;
}
}
return VERR_NO_MEMORY;
}
{
return VERR_INVALID_PARAMETER;
return VINF_SUCCESS;
}
{
return VINF_SUCCESS;
}
{
return VINF_SUCCESS;
}