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
141
142
143
|
/* $Id: rand.cpp $ */
/** @file
* IPRT - Random Numbers.
*/
/*
* Copyright (C) 2006-2008 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/rand.h>
#include <iprt/time.h>
#include <iprt/asm.h>
#include <iprt/err.h>
#include <iprt/assert.h>
#include <iprt/thread.h>
#include <iprt/once.h>
#include "internal/rand.h"
/*******************************************************************************
* Global Variables *
*******************************************************************************/
/** For lazily initializating of the random generator. */
static RTONCE g_rtRandOnce = RTONCE_INITIALIZER;
/** The default random generator. */
static RTRAND g_hRand = NIL_RTRAND;
/**
* Perform lazy initialization.
*
* @returns IPRT status code.
* @param pvUser1 Ignored.
* @param pvUser2 Ignored.
*/
static DECLCALLBACK(int) rtRandInitOnce(void *pvUser1, void *pvUser2)
{
NOREF(pvUser1);
NOREF(pvUser2);
RTRAND hRand;
int rc = RTRandAdvCreateSystemFaster(&hRand);
if (RT_FAILURE(rc))
rc = RTRandAdvCreateParkMiller(&hRand);
if (RT_SUCCESS(rc))
{
RTRandAdvSeed(hRand, ASMReadTSC() >> 8);
g_hRand = hRand;
}
else
AssertRC(rc);
return rc;
}
RTDECL(void) RTRandBytes(void *pv, size_t cb) RT_NO_THROW
{
RTOnce(&g_rtRandOnce, rtRandInitOnce, NULL, NULL);
RTRandAdvBytes(g_hRand, pv, cb);
}
RTDECL(uint32_t) RTRandU32Ex(uint32_t u32First, uint32_t u32Last) RT_NO_THROW
{
RTOnce(&g_rtRandOnce, rtRandInitOnce, NULL, NULL);
return RTRandAdvU32Ex(g_hRand, u32First, u32Last);
}
RTDECL(uint32_t) RTRandU32(void) RT_NO_THROW
{
RTOnce(&g_rtRandOnce, rtRandInitOnce, NULL, NULL);
return RTRandAdvU32(g_hRand);
}
RTDECL(int32_t) RTRandS32Ex(int32_t i32First, int32_t i32Last) RT_NO_THROW
{
RTOnce(&g_rtRandOnce, rtRandInitOnce, NULL, NULL);
return RTRandAdvS32Ex(g_hRand, i32First, i32Last);
}
RTDECL(int32_t) RTRandS32(void) RT_NO_THROW
{
RTOnce(&g_rtRandOnce, rtRandInitOnce, NULL, NULL);
return RTRandAdvS32(g_hRand);
}
RTDECL(uint64_t) RTRandU64Ex(uint64_t u64First, uint64_t u64Last) RT_NO_THROW
{
RTOnce(&g_rtRandOnce, rtRandInitOnce, NULL, NULL);
return RTRandAdvU64Ex(g_hRand, u64First, u64Last);
}
RTDECL(uint64_t) RTRandU64(void) RT_NO_THROW
{
RTOnce(&g_rtRandOnce, rtRandInitOnce, NULL, NULL);
return RTRandAdvU64(g_hRand);
}
RTDECL(int64_t) RTRandS64Ex(int64_t i64First, int64_t i64Last) RT_NO_THROW
{
RTOnce(&g_rtRandOnce, rtRandInitOnce, NULL, NULL);
return RTRandAdvS64Ex(g_hRand, i64First, i64Last);
}
RTDECL(int64_t) RTRandS64(void) RT_NO_THROW
{
RTOnce(&g_rtRandOnce, rtRandInitOnce, NULL, NULL);
return RTRandAdvS32(g_hRand);
}
|
