diff options
Diffstat (limited to 'src/VBox/Runtime/r0drv/darwin/semfastmutex-r0drv-darwin.cpp')
| -rw-r--r-- | src/VBox/Runtime/r0drv/darwin/semfastmutex-r0drv-darwin.cpp | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/src/VBox/Runtime/r0drv/darwin/semfastmutex-r0drv-darwin.cpp b/src/VBox/Runtime/r0drv/darwin/semfastmutex-r0drv-darwin.cpp new file mode 100644 index 00000000..2d047076 --- /dev/null +++ b/src/VBox/Runtime/r0drv/darwin/semfastmutex-r0drv-darwin.cpp @@ -0,0 +1,150 @@ +/* $Id: semfastmutex-r0drv-darwin.cpp $ */ +/** @file + * IPRT - Fast Mutex Semaphores, Ring-0 Driver, Darwin. + */ + +/* + * Copyright (C) 2006-2023 Oracle and/or its affiliates. + * + * This file is part of VirtualBox base platform packages, as + * available from https://www.virtualbox.org. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, in version 3 of the + * License. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, see <https://www.gnu.org/licenses>. + * + * The contents of this file may alternatively be used under the terms + * of the Common Development and Distribution License Version 1.0 + * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included + * in the VirtualBox 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. + * + * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0 + */ + + +/********************************************************************************************************************************* +* Header Files * +*********************************************************************************************************************************/ +#include "the-darwin-kernel.h" +#include "internal/iprt.h" +#include <iprt/semaphore.h> + +#include <iprt/assert.h> +#include <iprt/asm.h> +#if defined(RT_ARCH_AMD64) || defined(RT_ARCH_X86) +# include <iprt/asm-amd64-x86.h> +#endif +#include <iprt/errcore.h> +#include <iprt/mem.h> +#include <iprt/mp.h> +#include <iprt/thread.h> + +#include "internal/magics.h" + + +/********************************************************************************************************************************* +* Structures and Typedefs * +*********************************************************************************************************************************/ +/** + * Wrapper for the darwin semaphore structure. + */ +typedef struct RTSEMFASTMUTEXINTERNAL +{ + /** Magic value (RTSEMFASTMUTEX_MAGIC). */ + uint32_t u32Magic; + /** The mutex. */ + lck_mtx_t *pMtx; +} RTSEMFASTMUTEXINTERNAL, *PRTSEMFASTMUTEXINTERNAL; + + + +RTDECL(int) RTSemFastMutexCreate(PRTSEMFASTMUTEX phFastMtx) +{ + AssertCompile(sizeof(RTSEMFASTMUTEXINTERNAL) > sizeof(void *)); + AssertPtrReturn(phFastMtx, VERR_INVALID_POINTER); + RT_ASSERT_PREEMPTIBLE(); + IPRT_DARWIN_SAVE_EFL_AC(); + + PRTSEMFASTMUTEXINTERNAL pThis = (PRTSEMFASTMUTEXINTERNAL)RTMemAlloc(sizeof(*pThis)); + if (pThis) + { + pThis->u32Magic = RTSEMFASTMUTEX_MAGIC; + Assert(g_pDarwinLockGroup); + pThis->pMtx = lck_mtx_alloc_init(g_pDarwinLockGroup, LCK_ATTR_NULL); + if (pThis->pMtx) + { + *phFastMtx = pThis; + IPRT_DARWIN_RESTORE_EFL_AC(); + return VINF_SUCCESS; + } + + RTMemFree(pThis); + } + IPRT_DARWIN_RESTORE_EFL_AC(); + return VERR_NO_MEMORY; +} + + +RTDECL(int) RTSemFastMutexDestroy(RTSEMFASTMUTEX hFastMtx) +{ + PRTSEMFASTMUTEXINTERNAL pThis = hFastMtx; + if (pThis == NIL_RTSEMFASTMUTEX) + return VINF_SUCCESS; + AssertPtrReturn(pThis, VERR_INVALID_HANDLE); + AssertMsgReturn(pThis->u32Magic == RTSEMFASTMUTEX_MAGIC, ("%p: u32Magic=%RX32\n", pThis, pThis->u32Magic), VERR_INVALID_HANDLE); + RT_ASSERT_INTS_ON(); + IPRT_DARWIN_SAVE_EFL_AC(); + + ASMAtomicWriteU32(&pThis->u32Magic, RTSEMFASTMUTEX_MAGIC_DEAD); + Assert(g_pDarwinLockGroup); + lck_mtx_free(pThis->pMtx, g_pDarwinLockGroup); + pThis->pMtx = NULL; + RTMemFree(pThis); + + IPRT_DARWIN_RESTORE_EFL_AC(); + return VINF_SUCCESS; +} + + +RTDECL(int) RTSemFastMutexRequest(RTSEMFASTMUTEX hFastMtx) +{ + PRTSEMFASTMUTEXINTERNAL pThis = hFastMtx; + AssertPtrReturn(pThis, VERR_INVALID_HANDLE); + AssertMsgReturn(pThis->u32Magic == RTSEMFASTMUTEX_MAGIC, ("%p: u32Magic=%RX32\n", pThis, pThis->u32Magic), VERR_INVALID_HANDLE); + RT_ASSERT_PREEMPTIBLE(); + IPRT_DARWIN_SAVE_EFL_AC(); + + lck_mtx_lock(pThis->pMtx); + + IPRT_DARWIN_RESTORE_EFL_ONLY_AC(); + return VINF_SUCCESS; +} + + +RTDECL(int) RTSemFastMutexRelease(RTSEMFASTMUTEX hFastMtx) +{ + PRTSEMFASTMUTEXINTERNAL pThis = hFastMtx; + AssertPtrReturn(pThis, VERR_INVALID_HANDLE); + AssertMsgReturn(pThis->u32Magic == RTSEMFASTMUTEX_MAGIC, ("%p: u32Magic=%RX32\n", pThis, pThis->u32Magic), VERR_INVALID_HANDLE); + RT_ASSERT_PREEMPTIBLE(); + IPRT_DARWIN_SAVE_EFL_AC(); + + lck_mtx_unlock(pThis->pMtx); + + IPRT_DARWIN_RESTORE_EFL_ONLY_AC(); + return VINF_SUCCESS; +} + |