spinlock-r0drv-linux.c revision 49c28d50ee1ddf5f3cdd20c83189cdf432213a6e
/* $Id$ */
/** @file
* IPRT - Spinlocks, Ring-0 Driver, Linux.
*/
/*
* Copyright (C) 2006-2013 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* 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-linux-kernel.h"
#include <iprt/spinlock.h>
#if defined(RT_ARCH_AMD64) || defined(RT_ARCH_X86)
# include <iprt/asm-amd64-x86.h>
#endif
/*******************************************************************************
* Structures and Typedefs *
*******************************************************************************/
/**
* Wrapper for the spinlock_t structure.
*/
typedef struct RTSPINLOCKINTERNAL
{
/** Spinlock magic value (RTSPINLOCK_MAGIC). */
/** The spinlock creation flags. */
/** The saved interrupt flag. */
unsigned long volatile fIntSaved;
/** The linux spinlock structure. */
#ifdef RT_MORE_STRICT
/** The idAssertCpu variable before acquring the lock for asserting after
* releasing the spinlock. */
RTCPUID volatile idAssertCpu;
/** The CPU that owns the lock. */
RTCPUID volatile idCpuOwner;
#endif
{
AssertReturn(fFlags == RTSPINLOCK_FLAGS_INTERRUPT_SAFE || fFlags == RTSPINLOCK_FLAGS_INTERRUPT_UNSAFE, VERR_INVALID_PARAMETER);
/*
* Allocate.
*/
Assert(sizeof(RTSPINLOCKINTERNAL) > sizeof(void *));
if (!pThis)
return VERR_NO_MEMORY;
/*
* Initialize and return.
*/
#ifdef RT_MORE_STRICT
#endif
return VINF_SUCCESS;
}
{
/*
* Validate input.
*/
if (!pThis)
return VERR_INVALID_PARAMETER;
{
return VERR_INVALID_PARAMETER;
}
return VINF_SUCCESS;
}
{
#if defined(CONFIG_PROVE_LOCKING) && !defined(RT_STRICT)
lockdep_off();
#endif
{
unsigned long fIntSaved;
}
else
#if defined(CONFIG_PROVE_LOCKING) && !defined(RT_STRICT)
lockdep_on();
#endif
}
{
#if defined(CONFIG_PROVE_LOCKING) && !defined(RT_STRICT)
lockdep_off();
#endif
{
}
else
#if defined(CONFIG_PROVE_LOCKING) && !defined(RT_STRICT)
lockdep_on();
#endif
}
{
#if 1
#else
#endif
}