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
197
198
199
200
201
202
203
204
205
206
|
/* Copyright (C) 2003 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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 for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <sysdep.h>
#include <pthread-errnos.h>
#include "lowlevel-atomic.h"
.text
#define SYS_gettimeofday __NR_gettimeofday
#define SYS_futex 240
#define FUTEX_WAIT 0
#define FUTEX_WAKE 1
.globl __lll_lock_wait
.type __lll_lock_wait,@function
.hidden __lll_lock_wait
.align 5
__lll_lock_wait:
mov r4, r6
mov r5, r4
mov #0, r7 /* No timeout. */
mov #FUTEX_WAIT, r5
2:
add #-1, r6 /* account for the preceeded xadd. */
mov #SYS_futex, r3
extu.b r3, r3
trapa #0x14
SYSCALL_INST_PAD
mov #-1, r3
XADD (r3, @r4, r2)
tst r3, r3
bf/s 2b
mov r2, r6
mov #-1, r1
mov.l r1, @r4
rts
mov r2, r0
.size __lll_lock_wait,.-__lll_lock_wait
#ifdef NOT_IN_libc
.globl lll_unlock_wake_cb
.type lll_unlock_wake_cb,@function
.hidden lll_unlock_wake_cb
.align 5
lll_unlock_wake_cb:
.align 2
mova 1f, r0
mov r15, r1
mov #-6, r15
0:
mov.l @r4, r2
add #1, r2
mov.l r2, @r4
1:
mov r1, r15
cmp/pl r2
bf 2f
rts
nop
.size lll_unlock_wake_cb,.-lll_unlock_wake_cb
#endif
.globl __lll_unlock_wake
.type __lll_unlock_wake,@function
.hidden __lll_unlock_wake
__lll_unlock_wake:
2:
mov #FUTEX_WAKE, r5
mov #1, r6 /* Wake one thread. */
mov #0, r7
mov.l r6, @r4 /* Stores 1. */
mov #SYS_futex, r3
extu.b r3, r3
trapa #0x14
SYSCALL_INST_PAD
rts
nop
.size __lll_unlock_wake,.-__lll_unlock_wake
#ifdef NOT_IN_libc
.globl __lll_wait_tid
.type __lll_wait_tid,@function
.hidden __lll_wait_tid
__lll_wait_tid:
mov.l @r4, r6
1:
mov #FUTEX_WAIT, r5
mov #0, r7
mov #SYS_futex, r3
extu.b r3, r3
trapa #0x14
SYSCALL_INST_PAD
mov r0, r1
mov.l @r4, r0
tst r0, r0
bf/s 1b
mov r0, r6
rts
nop
.size __lll_wait_tid,.-__lll_wait_tid
.globl __lll_timedwait_tid
.type __lll_timedwait_tid,@function
.hidden __lll_timedwait_tid
__lll_timedwait_tid:
mov.l r9, @-r15
mov.l r8, @-r15
mov r4, r8
mov r5, r9
add #-8, r15
2:
/* Get current time. */
mov r15, r4
mov #0, r5
mov #SYS_gettimeofday, r3
trapa #0x12
SYSCALL_INST_PAD
/* Compute relative timeout. */
mov.l @(4,r15), r0
mov.w .L1k, r1
dmulu.l r0, r1 /* Milli seconds to nano seconds. */
mov.l @r9, r2
mov.l @(4,r9), r3
mov.l @r15, r0
sts macl, r1
sub r0, r2
clrt
subc r1, r3
bf 5f
mov.l .L1g, r1
add r1, r3
add #-1, r2
5:
cmp/pz r2
bf 6f /* Time is already up. */
mov.l r2, @r15 /* Store relative timeout. */
mov.l r3, @(4,r15)
mov.l @r8, r6
tst r6, r6
bt 4f
mov r8, r4
mov #FUTEX_WAIT, r5
mov r15, r7
mov #SYS_futex, r3
extu.b r3, r3
trapa #0x14
SYSCALL_INST_PAD
mov.l @r8, r0
tst r0, r0
bf 1f
4:
mov #0, r0
3:
add #8, r15
mov.l @r15+, r8
rts
mov.l @r15+, r9
1:
mov #-ETIMEDOUT, r1
cmp/eq r0, r1
bf 2b
6:
bra 3b
mov #ETIMEDOUT, r0
.L1k:
.word 1000
.align 2
.L1g:
.long 1000000000
.size __lll_timedwait_tid,.-__lll_timedwait_tid
#endif
|
