/usr/src/virtualbox-guest-4.1.42/r0drv/initterm-r0drv.c is in virtualbox-guest-dkms 4.1.42-dfsg-1+deb7u1.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 | /* $Id: initterm-r0drv.cpp $ */
/** @file
* IPRT - Initialization & Termination, R0 Driver, Common.
*/
/*
* Copyright (C) 2006-2007 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 <iprt/initterm.h>
#include "internal/iprt.h"
#include <iprt/asm.h>
#include <iprt/assert.h>
#include <iprt/err.h>
#include <iprt/mp.h>
#include <iprt/thread.h>
#ifndef IN_GUEST /* play safe for now */
# include "r0drv/mp-r0drv.h"
# include "r0drv/power-r0drv.h"
#endif
#include "internal/initterm.h"
#include "internal/thread.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.
*/
RTR0DECL(int) RTR0Init(unsigned fReserved)
{
int rc;
Assert(fReserved == 0);
RT_ASSERT_PREEMPTIBLE();
/*
* 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 (ASMAtomicIncS32(&g_crtR0Users) != 1)
return VINF_SUCCESS;
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))
{
rc = rtR0PowerNotificationInit();
if (RT_SUCCESS(rc))
return rc;
rtR0MpNotificationTerm();
}
#else
if (RT_SUCCESS(rc))
return rc;
#endif
rtThreadTerm();
}
rtR0TermNative();
}
return rc;
}
RT_EXPORT_SYMBOL(RTR0Init);
static void rtR0Term(void)
{
rtThreadTerm();
#ifndef IN_GUEST /* play safe for now */
rtR0PowerNotificationTerm();
rtR0MpNotificationTerm();
#endif
rtR0TermNative();
}
/**
* Terminates the ring-0 driver runtime library.
*/
RTR0DECL(void) RTR0Term(void)
{
int32_t cNewUsers;
RT_ASSERT_PREEMPTIBLE();
cNewUsers = ASMAtomicDecS32(&g_crtR0Users);
Assert(cNewUsers >= 0);
if (cNewUsers == 0)
rtR0Term();
}
RT_EXPORT_SYMBOL(RTR0Term);
/* Note! Should *not* be exported since it's only for static linking. */
RTR0DECL(void) RTR0TermForced(void)
{
RT_ASSERT_PREEMPTIBLE();
AssertMsg(g_crtR0Users == 1, ("%d\n", g_crtR0Users));
rtR0Term();
}
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