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
|
/* $Id: initterm-r0drv.cpp $ */
/** @file
* IPRT - Initialization & Termination, R0 Driver, Common.
*/
/*
* Copyright (C) 2006-2007 Sun Microsystems, Inc.
*
* 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.
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 USA or visit http://www.sun.com if you need
* additional information or have any questions.
*/
/*******************************************************************************
* Header Files *
*******************************************************************************/
#include <iprt/initterm.h>
#include <iprt/asm.h>
#include <iprt/assert.h>
#include <iprt/err.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;
/**
* Initalizes 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);
/*
* 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))
{
#if !defined(RT_OS_LINUX)
rc = rtThreadInit();
#endif
if (RT_SUCCESS(rc))
{
#ifndef IN_GUEST /* play safe for now */
rc = rtR0MpNotificationInit();
if (RT_SUCCESS(rc))
rc = rtR0PowerNotificationInit();
#endif
if (RT_SUCCESS(rc))
return rc;
}
rtR0TermNative();
}
return rc;
}
/**
* Terminates the ring-0 driver runtime library.
*/
RTR0DECL(void) RTR0Term(void)
{
/*
* Last user does the cleanup.
*/
int32_t cNewUsers = ASMAtomicDecS32(&g_crtR0Users);
Assert(cNewUsers >= 0);
if (cNewUsers != 0)
return;
#if !defined(RT_OS_LINUX)
rtThreadTerm();
#endif
#ifndef IN_GUEST /* play safe for now */
rtR0PowerNotificationTerm();
rtR0MpNotificationTerm();
#endif
rtR0TermNative();
}
|
