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
|
/*
(c) Copyright 2012-2013 DirectFB integrated media GmbH
(c) Copyright 2001-2013 The world wide DirectFB Open Source Community (directfb.org)
(c) Copyright 2000-2004 Convergence (integrated media) GmbH
All rights reserved.
Written by Denis Oliver Kropp <dok@directfb.org>,
Andreas Shimokawa <andi@directfb.org>,
Marek Pikarski <mass@directfb.org>,
Sven Neumann <neo@directfb.org>,
Ville Syrjälä <syrjala@sci.fi> and
Claudio Ciccani <klan@users.sf.net>.
This 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 of the License, or (at your option) any later version.
This 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 this library; if not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
//#define DIRECT_ENABLE_DEBUG
#include <config.h>
#include <direct/atomic.h>
#include <direct/debug.h>
#include <direct/system.h>
#include <direct/util.h>
D_LOG_DOMAIN( Direct_Futex, "Direct/Futex", "Direct Futex" );
/**********************************************************************************************************************/
DirectResult
direct_futex_wait( int *uaddr,
int val )
{
#ifndef WIN32
DirectResult ret;
D_ASSERT( uaddr != NULL );
D_DEBUG_AT( Direct_Futex, "%s( %p, %d ) <- %d\n", __FUNCTION__, uaddr, val, *uaddr );
if (*uaddr != val) {
D_DEBUG_AT( Direct_Futex, " -> value changed!\n" );
return DR_OK;
}
while ((ret = direct_futex( uaddr, FUTEX_WAIT, val, NULL, NULL, 0 ))) {
switch (ret) {
case DR_SIGNALLED:
continue;
case DR_BUSY: // EAGAIN
return DR_OK;
default:
D_DERROR( ret, "Direct/Futex: FUTEX_WAIT (%p, %d) failed!\n", uaddr, val );
return ret;
}
}
return DR_OK;
#else
D_UNIMPLEMENTED();
return DR_UNIMPLEMENTED;
#endif
}
DirectResult
direct_futex_wait_timed( int *uaddr,
int val,
int ms )
{
#ifndef WIN32
DirectResult ret;
struct timespec timeout;
D_ASSERT( uaddr != NULL );
D_DEBUG_AT( Direct_Futex, "%s( %p, %d, %d ) <- %d\n", __FUNCTION__, uaddr, val, ms, *uaddr );
if (*uaddr != val) {
D_DEBUG_AT( Direct_Futex, " -> value changed!\n" );
return DR_OK;
}
timeout.tv_sec = ms / 1000;
timeout.tv_nsec = (ms % 1000) * 1000000;
while ((ret = direct_futex( uaddr, FUTEX_WAIT, val, &timeout, NULL, 0 ))) {
switch (ret) {
case DR_SIGNALLED:
continue;
case DR_BUSY: // EAGAIN
return DR_OK;
default:
D_DERROR( ret, "Direct/Futex: FUTEX_WAIT (%p, %d) failed!\n", uaddr, val );
case DR_TIMEOUT:
return ret;
}
}
return DR_OK;
#else
D_UNIMPLEMENTED();
return DR_UNIMPLEMENTED;
#endif
}
DirectResult
direct_futex_wake( int *uaddr, int num )
{
#ifndef WIN32
DirectResult ret;
D_ASSERT( uaddr != NULL );
D_ASSERT( num > 0 );
D_DEBUG_AT( Direct_Futex, "%s( %p, %d ) <- %d\n", __FUNCTION__, uaddr, num, *uaddr );
while ((ret = direct_futex( uaddr, FUTEX_WAKE, num, NULL, NULL, 0 ))) {
switch (ret) {
case DR_BUSY: // EAGAIN
continue;
default:
D_DERROR( ret, "Direct/Futex: FUTEX_WAKE (%p, %d) failed!\n", uaddr, num );
return ret;
}
}
return DR_OK;
#else
D_UNIMPLEMENTED();
return DR_UNIMPLEMENTED;
#endif
}
unsigned int __Direct_Futex_Wait_Count = 0;
unsigned int __Direct_Futex_Wake_Count = 0;
|
