initterm-r0drv.cpp revision ff1c60261b8a5b8fb6af2a92c4adcd5856d2c2f9
/* $Id$ */
/** @file
* IPRT - Initialization & Termination, R0 Driver, Common.
*/
/*
* Copyright (C) 2006-2011 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 <iprt/initterm.h>
#ifndef IN_GUEST /* play safe for now */
# include "r0drv/mp-r0drv.h"
# include "r0drv/power-r0drv.h"
#endif
#include "internal/initterm.h"
/*******************************************************************************
* Global Variables *
*******************************************************************************/
/** Count of current IPRT users.
* In ring-0 several drivers / kmods / kexts / wossnames may share the
* same runtime code. So, we need to keep count in order not to terminate
* it prematurely. */
static int32_t volatile g_crtR0Users = 0;
/**
* Initializes the ring-0 driver runtime library.
*
* @returns iprt status code.
* @param fReserved Flags reserved for the future.
*/
{
int rc;
#ifndef RT_OS_SOLARIS /* On Solaris our thread preemption information is only obtained in rtR0InitNative().*/
#endif
/*
* The first user initializes it.
* We rely on the module loader to ensure that there are no
* initialization races should two modules share the IPRT.
*/
if (cNewUsers != 1)
{
if (cNewUsers > 1)
return VINF_SUCCESS;
return VERR_INTERNAL_ERROR_3;
}
rc = rtR0InitNative();
if (RT_SUCCESS(rc))
{
rc = rtThreadInit();
if (RT_SUCCESS(rc))
{
#ifndef IN_GUEST /* play safe for now */
rc = rtR0MpNotificationInit();
if (RT_SUCCESS(rc))
{
if (RT_SUCCESS(rc))
return rc;
}
#else
if (RT_SUCCESS(rc))
return rc;
#endif
rtThreadTerm();
}
}
return rc;
}
static void rtR0Term(void)
{
rtThreadTerm();
#ifndef IN_GUEST /* play safe for now */
#endif
}
/**
* Terminates the ring-0 driver runtime library.
*/
{
if (cNewUsers == 0)
rtR0Term();
else if (cNewUsers < 0)
}
/* Note! Should *not* be exported since it's only for static linking. */
RTR0DECL(void) RTR0TermForced(void)
{
rtR0Term();
}