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/* $Id: semmutex-r0drv-haiku.c $ */
/** @file
* IPRT - Mutex Semaphores, Ring-0 Driver, Haiku.
*/
/*
* Copyright (C) 2012-2020 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* 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-haiku-kernel.h"
#include "internal/iprt.h"
#include <iprt/semaphore.h>
#include <iprt/asm.h>
#include <iprt/assert.h>
#include <iprt/err.h>
#include <iprt/mem.h>
#include <iprt/thread.h>
#include <iprt/time.h>
#include "internal/magics.h"
/*********************************************************************************************************************************
* Structures and Typedefs *
*********************************************************************************************************************************/
/**
* Wrapper for the Haiku (sleep) mutex.
*/
/* XXX: not optimal, maybe should use the (private)
kernel recursive_lock ? (but it's not waitable) */
typedef struct RTSEMMUTEXINTERNAL
{
/** Magic value (RTSEMMUTEX_MAGIC). */
uint32_t u32Magic;
/** Kernel semaphore. */
sem_id SemId;
/** Current holder */
volatile thread_id OwnerId;
/** Recursion count */
int32 cRecursion;
} RTSEMMUTEXINTERNAL, *PRTSEMMUTEXINTERNAL;
RTDECL(int) RTSemMutexCreate(PRTSEMMUTEX phMutexSem)
{
AssertCompile(sizeof(RTSEMMUTEXINTERNAL) > sizeof(void *));
AssertPtrReturn(phMutexSem, VERR_INVALID_POINTER);
PRTSEMMUTEXINTERNAL pThis = (PRTSEMMUTEXINTERNAL)RTMemAllocZ(sizeof(*pThis));
if (RT_UNLIKELY(!pThis))
return VERR_NO_MEMORY;
pThis->u32Magic = RTSEMMUTEX_MAGIC;
pThis->SemId = create_sem(0, "IPRT Mutex Semaphore");
if (pThis->SemId < B_OK)
{
pThis->OwnerId = -1;
pThis->cRecursion = 0;
*phMutexSem = pThis;
return VINF_SUCCESS;
}
RTMemFree(pThis);
return VERR_TOO_MANY_SEMAPHORES; /** @todo r=ramshankar: use RTErrConvertFromHaikuKernReturn */
}
RTDECL(int) RTSemMutexDestroy(RTSEMMUTEX hMutexSem)
{
PRTSEMMUTEXINTERNAL pThis = hMutexSem;
if (pThis == NIL_RTSEMMUTEX)
return VINF_SUCCESS;
AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
AssertMsgReturn(pThis->u32Magic == RTSEMMUTEX_MAGIC, ("%p: u32Magic=%RX32\n", pThis, pThis->u32Magic), VERR_INVALID_HANDLE);
AssertReturn(ASMAtomicCmpXchgU32(&pThis->u32Magic, RTSEMMUTEX_MAGIC_DEAD, RTSEMMUTEX_MAGIC), VERR_INVALID_HANDLE);
delete_sem(pThis->SemId);
RTMemFree(pThis);
return VINF_SUCCESS;
}
/**
* Worker function for acquiring the mutex.
*
* @param hMutexSem The mutex object.
* @param fFlags Mutex flags (see RTSEMWAIT_FLAGS_*)
* @param uTimeout Timeout in units specified by the flags.
*
* @return IPRT status code.
*/
static int rtSemMutexRequestEx(RTSEMMUTEX hMutexSem, uint32_t fFlags, uint64_t uTimeout)
{
PRTSEMMUTEXINTERNAL pThis = hMutexSem;
int rc;
status_t status;
int32 flags = 0;
bigtime_t timeout; /* in microseconds */
AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
AssertMsgReturn(pThis->u32Magic == RTSEMMUTEX_MAGIC, ("%p: u32Magic=%RX32\n", pThis, pThis->u32Magic), VERR_INVALID_HANDLE);
if (pThis->OwnerId == find_thread(NULL))
{
pThis->OwnerId++;
return VINF_SUCCESS;
}
if (fFlags & RTSEMWAIT_FLAGS_INDEFINITE)
timeout = B_INFINITE_TIMEOUT;
else
{
if (fFlags & RTSEMWAIT_FLAGS_NANOSECS)
timeout = uTimeout / 1000;
else if (fFlags & RTSEMWAIT_FLAGS_MILLISECS)
timeout = uTimeout * 1000;
else
return VERR_INVALID_PARAMETER;
if (fFlags & RTSEMWAIT_FLAGS_RELATIVE)
flags |= B_RELATIVE_TIMEOUT;
else if (fFlags & RTSEMWAIT_FLAGS_ABSOLUTE)
flags |= B_ABSOLUTE_TIMEOUT;
else
return VERR_INVALID_PARAMETER;
}
if (fFlags & RTSEMWAIT_FLAGS_INTERRUPTIBLE)
flags |= B_CAN_INTERRUPT;
status = acquire_sem_etc(pThis->SemId, 1, flags, timeout);
switch (status)
{
case B_OK:
rc = VINF_SUCCESS;
pThis->cRecursion = 1;
pThis->OwnerId = find_thread(NULL);
break;
case B_BAD_SEM_ID:
rc = VERR_SEM_DESTROYED;
break;
case B_INTERRUPTED:
rc = VERR_INTERRUPTED;
break;
case B_WOULD_BLOCK:
/* fallthrough? */
case B_TIMED_OUT:
rc = VERR_TIMEOUT;
break;
default:
rc = VERR_INVALID_PARAMETER;
break;
}
return rc;
}
RTDECL(int) RTSemMutexRequest(RTSEMMUTEX hMutexSem, RTMSINTERVAL cMillies)
{
return rtSemMutexRequestEx(hMutexSem, RTSEMWAIT_FLAGS_RELATIVE | RTSEMWAIT_FLAGS_RESUME | RTSEMWAIT_FLAGS_MILLISECS, cMillies);
}
RTDECL(int) RTSemMutexRequestDebug(RTSEMMUTEX hMutexSem, RTMSINTERVAL cMillies, RTHCUINTPTR uId, RT_SRC_POS_DECL)
{
return RTSemMutexRequest(hMutexSem, cMillies);
}
RTDECL(int) RTSemMutexRequestNoResume(RTSEMMUTEX hMutexSem, RTMSINTERVAL cMillies)
{
return rtSemMutexRequestEx(hMutexSem, RTSEMWAIT_FLAGS_RELATIVE | RTSEMWAIT_FLAGS_NORESUME | RTSEMWAIT_FLAGS_MILLISECS, cMillies);
}
RTDECL(int) RTSemMutexRequestNoResumeDebug(RTSEMMUTEX hMutexSem, RTMSINTERVAL cMillies, RTHCUINTPTR uId, RT_SRC_POS_DECL)
{
return RTSemMutexRequestNoResume(hMutexSem, cMillies);
}
RTDECL(int) RTSemMutexRelease(RTSEMMUTEX hMutexSem)
{
PRTSEMMUTEXINTERNAL pThis = hMutexSem;
AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
AssertMsgReturn(pThis->u32Magic == RTSEMMUTEX_MAGIC, ("%p: u32Magic=%RX32\n", pThis, pThis->u32Magic), VERR_INVALID_HANDLE);
if (pThis->OwnerId != find_thread(NULL))
return VERR_INVALID_HANDLE;
if (--pThis->cRecursion == 0)
{
pThis->OwnerId == -1;
release_sem(pThis->SemId);
}
return VINF_SUCCESS;
}
RTDECL(bool) RTSemMutexIsOwned(RTSEMMUTEX hMutexSem)
{
PRTSEMMUTEXINTERNAL pThis = hMutexSem;
AssertPtrReturn(pThis, false);
AssertMsgReturn(pThis->u32Magic == RTSEMMUTEX_MAGIC, ("%p: u32Magic=%RX32\n", pThis, pThis->u32Magic), false);
return pThis->OwnerId != -1;
}
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