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
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
|
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
#include "system.h"
#include <osl/armarch.h>
#include <osl/interlck.h>
#include <osl/diagnose.h>
#if ( defined ( SOLARIS ) || defined ( NETBSD ) ) && defined ( SPARC )
#error please use asm/interlck_sparc.s
#elif defined ( SOLARIS) && defined ( X86 )
#error please use asm/interlck_x86.s
#elif defined ( ARM ) && (( __GNUC__ < 4 ) || (( __GNUC__ == 4) && ( __GNUC_MINOR__ < 6 ))) && ( __ARM_ARCH__ >= 6)
// assembler implementation for gcc <4.6 on arm
// originally contributed by Eric Bachard / OOo4Kids
// replaced with the asm code generated by Linaro gcc 4.5
// which includes memory barriers to make it SMP-safe
// #i117017# and lp#726529
oslInterlockedCount SAL_CALL osl_incrementInterlockedCount(oslInterlockedCount* pCount)
{
register oslInterlockedCount nCount __asm__ ("r1");
int nResult;
__asm__ __volatile__ (
" dmb\n"
"1: ldrex %0, [%3]\n"
" add %0, %0, #1\n"
" strex %1, %0, [%3]\n"
" teq %1, #0\n"
" bne 1b\n"
" dmb\n"
: "=&r" (nCount), "=&r" (nResult), "=m" (*pCount)
: "r" (pCount)
: "memory");
return nCount;
}
oslInterlockedCount SAL_CALL osl_decrementInterlockedCount(oslInterlockedCount* pCount)
{
register oslInterlockedCount nCount __asm__ ("r1");
int nResult;
__asm__ __volatile__ (
" dmb\n"
"0: ldrex %0, [%3]\n"
" sub %0, %0, #1\n"
" strex %1, %0, [%3]\n"
" teq %1, #0\n"
" bne 0b\n"
" dmb\n"
: "=&r" (nCount), "=&r" (nResult), "=m" (*pCount)
: "r" (pCount)
: "memory");
return nCount;
}
#elif defined ( GCC ) && ( defined ( X86 ) || defined ( X86_64 ) )
/* That's possible on x86-64 too since oslInterlockedCount is a sal_Int32 */
extern int osl_isSingleCPU;
/*****************************************************************************/
/* osl_incrementInterlockedCount */
/*****************************************************************************/
oslInterlockedCount SAL_CALL osl_incrementInterlockedCount(oslInterlockedCount* pCount)
{
// Fast case for old, slow, single CPU Intel machines for whom
// interlocking is a performance nightmare.
register oslInterlockedCount nCount asm("%eax");
nCount = 1;
if ( osl_isSingleCPU ) {
__asm__ __volatile__ (
"xaddl %0, %1\n\t"
: "+r" (nCount), "+m" (*pCount)
: /* nothing */
: "memory");
return ++nCount;
}
#if ( __GNUC__ > 4 ) || (( __GNUC__ == 4) && ( __GNUC_MINOR__ >= 4 ))
else
return __sync_add_and_fetch (pCount, 1);
#else
else {
__asm__ __volatile__ (
"lock\n\t"
"xaddl %0, %1\n\t"
: "+r" (nCount), "+m" (*pCount)
: /* nothing */
: "memory");
}
return ++nCount;
#endif
}
oslInterlockedCount SAL_CALL osl_decrementInterlockedCount(oslInterlockedCount* pCount)
{
register oslInterlockedCount nCount asm("%eax");
nCount = -1;
if ( osl_isSingleCPU ) {
__asm__ __volatile__ (
"xaddl %0, %1\n\t"
: "+r" (nCount), "+m" (*pCount)
: /* nothing */
: "memory");
return --nCount;
}
#if ( __GNUC__ > 4 ) || (( __GNUC__ == 4) && ( __GNUC_MINOR__ >= 4 ))
else
return __sync_sub_and_fetch (pCount, 1);
#else
else {
__asm__ __volatile__ (
"lock\n\t"
"xaddl %0, %1\n\t"
: "+r" (nCount), "+m" (*pCount)
: /* nothing */
: "memory");
}
return --nCount;
#endif
}
#elif ( __GNUC__ > 4 ) || (( __GNUC__ == 4) && ( __GNUC_MINOR__ >= 4 ))
oslInterlockedCount SAL_CALL osl_incrementInterlockedCount(oslInterlockedCount* pCount)
{
return __sync_add_and_fetch(pCount, 1);
}
oslInterlockedCount SAL_CALL osl_decrementInterlockedCount(oslInterlockedCount* pCount)
{
return __sync_sub_and_fetch(pCount, 1);
}
#else
/* use only if nothing else works, expensive due to single mutex for all reference counts */
static pthread_mutex_t InterLock = PTHREAD_MUTEX_INITIALIZER;
/*****************************************************************************/
/* osl_incrementInterlockedCount */
/*****************************************************************************/
oslInterlockedCount SAL_CALL osl_incrementInterlockedCount(oslInterlockedCount* pCount)
{
oslInterlockedCount Count;
pthread_mutex_lock(&InterLock);
Count = ++(*pCount);
pthread_mutex_unlock(&InterLock);
return (Count);
}
/*****************************************************************************/
/* osl_decrementInterlockedCount */
/*****************************************************************************/
oslInterlockedCount SAL_CALL osl_decrementInterlockedCount(oslInterlockedCount* pCount)
{
oslInterlockedCount Count;
pthread_mutex_lock(&InterLock);
Count = --(*pCount);
pthread_mutex_unlock(&InterLock);
return (Count);
}
#endif /* default */
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|
