diff options
Diffstat (limited to 'src/VBox/Runtime/r0drv/netbsd/spinlock-r0drv-netbsd.c')
| -rw-r--r-- | src/VBox/Runtime/r0drv/netbsd/spinlock-r0drv-netbsd.c | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/src/VBox/Runtime/r0drv/netbsd/spinlock-r0drv-netbsd.c b/src/VBox/Runtime/r0drv/netbsd/spinlock-r0drv-netbsd.c new file mode 100644 index 00000000..fe9c8d86 --- /dev/null +++ b/src/VBox/Runtime/r0drv/netbsd/spinlock-r0drv-netbsd.c @@ -0,0 +1,180 @@ +/* $Id: spinlock-r0drv-netbsd.c $ */ +/** @file + * IPRT - Spinlocks, Ring-0 Driver, NetBSD. + */ + +/* + * Contributed by knut st. osmundsen. + * + * Copyright (C) 2007-2023 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 + * -------------------------------------------------------------------- + * + * Copyright (c) 2007 knut st. osmundsen <bird-src-spam@anduin.net> + * + * Permission is hereby granted, free of charge, to any person + * obtaining a copy of this software and associated documentation + * files (the "Software"), to deal in the Software without + * restriction, including without limitation the rights to use, + * copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following + * conditions: + * + * The above copyright notice and this permission notice shall be + * included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES + * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT + * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, + * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + */ + + +/********************************************************************************************************************************* +* Header Files * +*********************************************************************************************************************************/ +#include "the-netbsd-kernel.h" +#include "internal/iprt.h" + +#include <iprt/spinlock.h> +#include <iprt/errcore.h> +#include <iprt/alloc.h> +#include <iprt/assert.h> +#include <iprt/asm.h> +#include <iprt/asm-amd64-x86.h> +#include <iprt/thread.h> +#include <iprt/mp.h> + +#include "internal/magics.h" + + +/********************************************************************************************************************************* +* Structures and Typedefs * +*********************************************************************************************************************************/ +/** + * Wrapper for the struct mtx type. + */ +typedef struct RTSPINLOCKINTERNAL +{ + /** Spinlock magic value (RTSPINLOCK_MAGIC). */ + uint32_t volatile u32Magic; + /** The spinlock. */ + kmutex_t pSpinLock; + /** Saved interrupt flag. */ + uint32_t volatile fIntSaved; + /** The spinlock creation flags. */ + uint32_t fFlags; +} RTSPINLOCKINTERNAL, *PRTSPINLOCKINTERNAL; + + +RTDECL(int) RTSpinlockCreate(PRTSPINLOCK pSpinlock, uint32_t fFlags, const char *pszName) +{ + RT_ASSERT_PREEMPTIBLE(); + AssertReturn(fFlags == RTSPINLOCK_FLAGS_INTERRUPT_SAFE || fFlags == RTSPINLOCK_FLAGS_INTERRUPT_UNSAFE, VERR_INVALID_PARAMETER); + + /* + * Allocate. + */ + AssertCompile(sizeof(RTSPINLOCKINTERNAL) > sizeof(void *)); + PRTSPINLOCKINTERNAL pThis = (PRTSPINLOCKINTERNAL)RTMemAllocZ(sizeof(*pThis)); + if (!pThis) + return VERR_NO_MEMORY; + + /* + * Initialize & return. + */ + pThis->u32Magic = RTSPINLOCK_MAGIC; + pThis->fFlags = fFlags; + pThis->fIntSaved = 0; + if (fFlags & RTSPINLOCK_FLAGS_INTERRUPT_SAFE) { + mutex_init(&pThis->pSpinLock, MUTEX_DEFAULT, IPL_BIO); + } else { + mutex_init(&pThis->pSpinLock, MUTEX_DEFAULT, IPL_NONE); + } + + *pSpinlock = pThis; + return VINF_SUCCESS; +} + + +RTDECL(int) RTSpinlockDestroy(RTSPINLOCK Spinlock) +{ + /* + * Validate input. + */ + RT_ASSERT_INTS_ON(); + PRTSPINLOCKINTERNAL pThis = (PRTSPINLOCKINTERNAL)Spinlock; + if (!pThis) + return VERR_INVALID_PARAMETER; + AssertMsgReturn(pThis->u32Magic == RTSPINLOCK_MAGIC, + ("Invalid spinlock %p magic=%#x\n", pThis, pThis->u32Magic), + VERR_INVALID_PARAMETER); + + /* + * Make the lock invalid and release the memory. + */ + ASMAtomicIncU32(&pThis->u32Magic); + mutex_destroy(&pThis->pSpinLock); + RTMemFree(pThis); + return VINF_SUCCESS; +} + + +RTDECL(void) RTSpinlockAcquire(RTSPINLOCK Spinlock) +{ + PRTSPINLOCKINTERNAL pThis = (PRTSPINLOCKINTERNAL)Spinlock; + RT_ASSERT_PREEMPT_CPUID_VAR(); + AssertPtr(pThis); + Assert(pThis->u32Magic == RTSPINLOCK_MAGIC); + + if (pThis->fFlags & RTSPINLOCK_FLAGS_INTERRUPT_SAFE) { + mutex_spin_enter(&pThis->pSpinLock); + } else { + mutex_enter(&pThis->pSpinLock); + } +} + + +RTDECL(void) RTSpinlockRelease(RTSPINLOCK Spinlock) +{ + PRTSPINLOCKINTERNAL pThis = (PRTSPINLOCKINTERNAL)Spinlock; + AssertPtr(pThis); + Assert(pThis->u32Magic == RTSPINLOCK_MAGIC); + + if (pThis->fFlags & RTSPINLOCK_FLAGS_INTERRUPT_SAFE) { + mutex_spin_exit(&pThis->pSpinLock); + } else { + mutex_exit(&pThis->pSpinLock); + } +} |