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/* $Id: spinlock-r0drv-haiku.c $ */
/** @file
* IPRT - Spinlocks, Ring-0 Driver, Haiku.
*/
/*
* Copyright (C) 2012-2019 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/spinlock.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/thread.h>
#include "internal/magics.h"
/*********************************************************************************************************************************
* Structures and Typedefs *
*********************************************************************************************************************************/
/**
* Wrapper for the KSPIN_LOCK type.
*/
typedef struct RTSPINLOCKINTERNAL
{
/** Spinlock magic value (RTSPINLOCK_MAGIC). */
uint32_t volatile u32Magic;
/** Spinlock creation flags */
uint32_t fFlags;
/** Saved interrupt CPU status. */
cpu_status volatile fIntSaved;
/** The Haiku spinlock structure. */
spinlock hSpinLock;
} RTSPINLOCKINTERNAL, *PRTSPINLOCKINTERNAL;
RTDECL(int) RTSpinlockCreate(PRTSPINLOCK pSpinlock, uint32_t fFlags, const char *pszName)
{
RT_ASSERT_PREEMPTIBLE();
NOREF(pszName);
/*
* Allocate.
*/
AssertCompile(sizeof(RTSPINLOCKINTERNAL) > sizeof(void *));
PRTSPINLOCKINTERNAL pSpinlockInt = (PRTSPINLOCKINTERNAL)RTMemAllocZ(sizeof(*pSpinlockInt));
if (RT_UNLIKELY(!pSpinlockInt))
return VERR_NO_MEMORY;
/*
* Initialize & return.
*/
pSpinlockInt->u32Magic = RTSPINLOCK_MAGIC;
pSpinlockInt->fFlags = fFlags;
pSpinlockInt->fIntSaved = 0;
B_INITIALIZE_SPINLOCK(&pSpinlockInt->hSpinLock);
*pSpinlock = pSpinlockInt;
return VINF_SUCCESS;
}
RTDECL(int) RTSpinlockDestroy(RTSPINLOCK Spinlock)
{
/*
* Validate input.
*/
PRTSPINLOCKINTERNAL pSpinlockInt = (PRTSPINLOCKINTERNAL)Spinlock;
if (RT_UNLIKELY(!pSpinlockInt))
return VERR_INVALID_PARAMETER;
AssertMsgReturn(pSpinlockInt->u32Magic == RTSPINLOCK_MAGIC,
("Invalid spinlock %p magic=%#x\n", pSpinlockInt, pSpinlockInt->u32Magic),
VERR_INVALID_PARAMETER);
/*
* Make the lock invalid and release the memory.
*/
ASMAtomicIncU32(&pSpinlockInt->u32Magic);
B_INITIALIZE_SPINLOCK(&pSpinlockInt->hSpinLock);
RTMemFree(pSpinlockInt);
return VINF_SUCCESS;
}
RTDECL(void) RTSpinlockAcquire(RTSPINLOCK Spinlock)
{
PRTSPINLOCKINTERNAL pSpinlockInt = (PRTSPINLOCKINTERNAL)Spinlock;
AssertPtr(pSpinlockInt);
Assert(pSpinlockInt->u32Magic == RTSPINLOCK_MAGIC);
/* Haiku cannot take spinlocks without disabling interrupts. Ignore our spinlock creation flags. */
pSpinlockInt->fIntSaved = disable_interrupts();
acquire_spinlock(&pSpinlockInt->hSpinLock);
}
RTDECL(void) RTSpinlockRelease(RTSPINLOCK Spinlock)
{
PRTSPINLOCKINTERNAL pSpinlockInt = (PRTSPINLOCKINTERNAL)Spinlock;
AssertPtr(pSpinlockInt);
Assert(pSpinlockInt->u32Magic == RTSPINLOCK_MAGIC);
release_spinlock(&pSpinlockInt->hSpinLock);
restore_interrupts(pSpinlockInt->fIntSaved);
}
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