9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync/* $Id$ */
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync/** @file
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * IPRT - Fast Mutex Semaphores, Ring-0 Driver, Haiku.
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync */
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync/*
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * Copyright (C) 2012 Oracle Corporation
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync *
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * This file is part of VirtualBox Open Source Edition (OSE), as
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * available from http://www.virtualbox.org. This file is free software;
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * you can redistribute it and/or modify it under the terms of the GNU
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * General Public License (GPL) as published by the Free Software
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * Foundation, in version 2 as it comes in the "COPYING" file of the
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync *
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * The contents of this file may alternatively be used under the terms
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * of the Common Development and Distribution License Version 1.0
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * VirtualBox OSE distribution, in which case the provisions of the
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * CDDL are applicable instead of those of the GPL.
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync *
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * You may elect to license modified versions of this file under the
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * terms and conditions of either the GPL or the CDDL or both.
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync */
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync/*******************************************************************************
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync* Header Files *
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync*******************************************************************************/
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync#include "the-haiku-kernel.h"
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync#include <iprt/semaphore.h>
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync#include <iprt/err.h>
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync#include <iprt/alloc.h>
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync#include <iprt/assert.h>
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync#include <iprt/asm.h>
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync#include "internal/magics.h"
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync/*******************************************************************************
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync* Structures and Typedefs *
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync*******************************************************************************/
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync/**
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * Wrapper for the Haiku (sleep) mutex.
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync */
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsynctypedef struct RTSEMFASTMUTEXINTERNAL
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync{
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync /** Magic value (RTSEMFASTMUTEX_MAGIC). */
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync uint32_t u32Magic;
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync /** A good old Benaphore. */
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync vint32 BenId;
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync sem_id SemId;
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync} RTSEMFASTMUTEXINTERNAL, *PRTSEMFASTMUTEXINTERNAL;
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsyncRTDECL(int) RTSemFastMutexCreate(PRTSEMFASTMUTEX phFastMtx)
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync{
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync AssertCompile(sizeof(RTSEMFASTMUTEXINTERNAL) > sizeof(void *));
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync AssertPtrReturn(phFastMtx, VERR_INVALID_POINTER);
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync PRTSEMFASTMUTEXINTERNAL pThis = (PRTSEMFASTMUTEXINTERNAL)RTMemAllocZ(sizeof(*pThis));
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync if (RT_UNLIKELY(!pThis))
2b3dc93fedb4e72ac5b3cbaa89a9fc2f559be550vboxsync return VERR_NO_MEMORY;
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync pThis->u32Magic = RTSEMFASTMUTEX_MAGIC;
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync pThis->BenId = 0;
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync pThis->SemId = create_sem(0, "IPRT Fast Mutex Semaphore");
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync if (pThis->SemId >= B_OK)
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync {
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync *phFastMtx = pThis;
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync return VINF_SUCCESS;
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync }
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync RTMemFree(pThis);
2b3dc93fedb4e72ac5b3cbaa89a9fc2f559be550vboxsync return VERR_TOO_MANY_SEMAPHORES; /** @todo r=ramshankar: use RTErrConvertFromHaikuKernReturn */
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync}
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsyncRTDECL(int) RTSemFastMutexDestroy(RTSEMFASTMUTEX hFastMtx)
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync{
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync PRTSEMFASTMUTEXINTERNAL pThis = hFastMtx;
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync if (pThis == NIL_RTSEMFASTMUTEX)
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync return VINF_SUCCESS;
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync AssertMsgReturn(pThis->u32Magic == RTSEMFASTMUTEX_MAGIC, ("%p: u32Magic=%RX32\n", pThis, pThis->u32Magic), VERR_INVALID_HANDLE);
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync ASMAtomicWriteU32(&pThis->u32Magic, RTSEMFASTMUTEX_MAGIC_DEAD);
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync delete_sem(pThis->SemId);
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync RTMemFree(pThis);
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync return VINF_SUCCESS;
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync}
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsyncRTDECL(int) RTSemFastMutexRequest(RTSEMFASTMUTEX hFastMtx)
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync{
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync PRTSEMFASTMUTEXINTERNAL pThis = hFastMtx;
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync AssertMsgReturn(pThis->u32Magic == RTSEMFASTMUTEX_MAGIC, ("%p: u32Magic=%RX32\n", pThis, pThis->u32Magic), VERR_INVALID_HANDLE);
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync if (atomic_add(&pThis->BenId, 1) > 0)
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync acquire_sem(pThis->SemId);
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync return VINF_SUCCESS;
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync}
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsyncRTDECL(int) RTSemFastMutexRelease(RTSEMFASTMUTEX hFastMtx)
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync{
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync PRTSEMFASTMUTEXINTERNAL pThis = hFastMtx;
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync AssertPtrReturn(pThis, VERR_INVALID_HANDLE);
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync AssertMsgReturn(pThis->u32Magic == RTSEMFASTMUTEX_MAGIC, ("%p: u32Magic=%RX32\n", pThis, pThis->u32Magic), VERR_INVALID_HANDLE);
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync if (atomic_add(&pThis->BenId, -1) > 1)
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync release_sem(pThis->SemId);
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync return VINF_SUCCESS;
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync}
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync