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
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
|
/* GNU Objective C Runtime Thread Interface - SGI IRIX Implementation
Copyright (C) 1996, 1997, 2009 Free Software Foundation, Inc.
Contributed by Galen C. Hunt (gchunt@cs.rochester.edu)
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation; either version 3, or (at your option) any later version.
GCC 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 General Public License for more
details.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
#include <stdlib.h>
#include <sys/types.h>
#include <sys/sysmp.h>
#include <sys/prctl.h>
#include <ulocks.h>
#include "objc/thr.h"
#include "objc/runtime.h"
/* Key structure for maintaining thread specific storage */
static void * __objc_shared_arena_handle = NULL;
/* Backend initialization functions */
/* Initialize the threads subsystem. */
int
__objc_init_thread_system(void)
{
/* Name of IRIX arena. */
char arena_name[64];
DEBUG_PRINTF("__objc_init_thread_system\n");
/* Construct a temporary name for arena. */
sprintf(arena_name, "/usr/tmp/objc_%05u", (unsigned)getpid());
/* Up to 256 threads. Arena only for threads. */
usconfig(CONF_INITUSERS, 256);
usconfig(CONF_ARENATYPE, US_SHAREDONLY);
/* Initialize the arena */
if (!(__objc_shared_arena_handle = usinit(arena_name)))
/* Failed */
return -1;
return 0;
}
/* Close the threads subsystem. */
int
__objc_close_thread_system(void)
{
return 0;
}
/* Backend thread functions */
/* Create a new thread of execution. */
objc_thread_t
__objc_thread_detach(void (*func)(void *arg), void *arg)
{
objc_thread_t thread_id;
int sys_id;
if ((sys_id = sproc((void *)func, PR_SALL, arg)) >= 0)
thread_id = (objc_thread_t)sys_id;
else
thread_id = NULL;
return thread_id;
}
/* Set the current thread's priority. */
int
__objc_thread_set_priority(int priority)
{
/* Not implemented yet */
return -1;
}
/* Return the current thread's priority. */
int
__objc_thread_get_priority(void)
{
/* Not implemented yet */
return OBJC_THREAD_INTERACTIVE_PRIORITY;
}
/* Yield our process time to another thread. */
void
__objc_thread_yield(void)
{
sginap(0);
}
/* Terminate the current thread. */
int
__objc_thread_exit(void)
{
/* IRIX only has exit. */
exit(__objc_thread_exit_status);
/* Failed if we reached here */
return -1;
}
/* Returns an integer value which uniquely describes a thread. */
objc_thread_t
__objc_thread_id(void)
{
/* Threads are processes. */
return (objc_thread_t)get_pid();
}
/* Sets the thread's local storage pointer. */
int
__objc_thread_set_data(void *value)
{
*((void **)&PRDA->usr_prda) = value;
return 0;
}
/* Returns the thread's local storage pointer. */
void *
__objc_thread_get_data(void)
{
return *((void **)&PRDA->usr_prda);
}
/* Backend mutex functions */
/* Allocate a mutex. */
int
__objc_mutex_allocate(objc_mutex_t mutex)
{
if (!( (ulock_t)(mutex->backend) = usnewlock(__objc_shared_arena_handle) ))
return -1;
else
return 0;
}
/* Deallocate a mutex. */
int
__objc_mutex_deallocate(objc_mutex_t mutex)
{
usfreelock((ulock_t)(mutex->backend), __objc_shared_arena_handle);
return 0;
}
/* Grab a lock on a mutex. */
int
__objc_mutex_lock(objc_mutex_t mutex)
{
if (ussetlock((ulock_t)(mutex->backend)) == 0)
return -1;
else
return 0;
}
/* Try to grab a lock on a mutex. */
int
__objc_mutex_trylock(objc_mutex_t mutex)
{
if (ustestlock((ulock_t)(mutex->backend)) == 0)
return -1;
else
return 0;
}
/* Unlock the mutex */
int
__objc_mutex_unlock(objc_mutex_t mutex)
{
usunsetlock((ulock_t)(mutex->backend));
return 0;
}
/* Backend condition mutex functions */
/* Allocate a condition. */
int
__objc_condition_allocate(objc_condition_t condition)
{
/* Unimplemented. */
return -1;
}
/* Deallocate a condition. */
int
__objc_condition_deallocate(objc_condition_t condition)
{
/* Unimplemented. */
return -1;
}
/* Wait on the condition */
int
__objc_condition_wait(objc_condition_t condition, objc_mutex_t mutex)
{
/* Unimplemented. */
return -1;
}
/* Wake up all threads waiting on this condition. */
int
__objc_condition_broadcast(objc_condition_t condition)
{
/* Unimplemented. */
return -1;
}
/* Wake up one thread waiting on this condition. */
int
__objc_condition_signal(objc_condition_t condition)
{
/* Unimplemented. */
return -1;
}
/* End of File */
|
