From 4035b1bfb1e5843a539a8b624d21952b756974d1 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 27 Apr 2024 16:19:18 +0200 Subject: Adding upstream version 6.1.22-dfsg. Signed-off-by: Daniel Baumann --- src/VBox/Runtime/r0drv/os2/spinlock-r0drv-os2.cpp | 155 ++++++++++++++++++++++ 1 file changed, 155 insertions(+) create mode 100644 src/VBox/Runtime/r0drv/os2/spinlock-r0drv-os2.cpp (limited to 'src/VBox/Runtime/r0drv/os2/spinlock-r0drv-os2.cpp') diff --git a/src/VBox/Runtime/r0drv/os2/spinlock-r0drv-os2.cpp b/src/VBox/Runtime/r0drv/os2/spinlock-r0drv-os2.cpp new file mode 100644 index 00000000..b746bd59 --- /dev/null +++ b/src/VBox/Runtime/r0drv/os2/spinlock-r0drv-os2.cpp @@ -0,0 +1,155 @@ +/* $Id: spinlock-r0drv-os2.cpp $ */ +/** @file + * IPRT - Spinlocks, Ring-0 Driver, OS/2. + */ + +/* + * Contributed by knut st. osmundsen. + * + * Copyright (C) 2007-2020 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. + * -------------------------------------------------------------------- + * + * This code is based on: + * + * Copyright (c) 2007 knut st. osmundsen + * + * 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-os2-kernel.h" + +#include +#include +#include +#include +#include +#ifdef RT_STRICT +# include +#endif + +#include "internal/magics.h" + + +/********************************************************************************************************************************* +* Structures and Typedefs * +*********************************************************************************************************************************/ +/** + * Wrapper for the SpinLock_t type. + */ +typedef struct RTSPINLOCKINTERNAL +{ + /** Spinlock magic value (RTSPINLOCK_MAGIC). */ + uint32_t volatile u32Magic; + /** Spinlock creation flags. */ + uint32_t fFlags; + /** The OS/2 spinlock structure. */ + SpinLock_t Spinlock; +} RTSPINLOCKINTERNAL, *PRTSPINLOCKINTERNAL; + + +RTDECL(int) RTSpinlockCreate(PRTSPINLOCK pSpinlock, uint32_t fFlags, const char *pszName) +{ + AssertReturn(fFlags == RTSPINLOCK_FLAGS_INTERRUPT_SAFE || fFlags == RTSPINLOCK_FLAGS_INTERRUPT_UNSAFE, VERR_INVALID_PARAMETER); + RT_NOREF(pszName); + + /* + * Allocate. + */ + AssertCompile(sizeof(RTSPINLOCKINTERNAL) > sizeof(void *)); + PRTSPINLOCKINTERNAL pThis = (PRTSPINLOCKINTERNAL)RTMemAlloc(sizeof(*pThis)); + if (!pThis) + return VERR_NO_MEMORY; + + /* + * Initialize & return. + */ + pThis->u32Magic = RTSPINLOCK_MAGIC; + pThis->fFlags = fFlags; + KernAllocSpinLock(&pThis->Spinlock); + *pSpinlock = pThis; + return VINF_SUCCESS; +} + + +RTDECL(int) RTSpinlockDestroy(RTSPINLOCK Spinlock) +{ + /* + * Validate input. + */ + 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); + KernFreeSpinLock(&pThis->Spinlock); + RTMemFree(pThis); + return VINF_SUCCESS; +} + + +RTDECL(void) RTSpinlockAcquire(RTSPINLOCK Spinlock) +{ + PRTSPINLOCKINTERNAL pThis = (PRTSPINLOCKINTERNAL)Spinlock; + AssertPtr(pThis); + Assert(pThis->u32Magic == RTSPINLOCK_MAGIC); + + KernAcquireSpinLock(&pThis->Spinlock); + Assert(!ASMIntAreEnabled()); /** @todo verify that interrupts are disabled. */ +} + + +RTDECL(void) RTSpinlockRelease(RTSPINLOCK Spinlock) +{ + PRTSPINLOCKINTERNAL pThis = (PRTSPINLOCKINTERNAL)Spinlock; + AssertPtr(pThis); + Assert(pThis->u32Magic == RTSPINLOCK_MAGIC); + + KernReleaseSpinLock(&pThis->Spinlock); +} + -- cgit v1.2.3