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
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
|
#include "thread.h"
#ifdef __sgi
#include <stdlib.h>
#include <stdio.h>
#include <signal.h>
#include <sys/types.h>
#include <sys/prctl.h>
#include <ulocks.h>
static usptr_t *shared_arena;
static int exit_status;
static int do_exit;
static int exiting;
#endif
#ifdef sun
#include <lwp/lwp.h>
#include <lwp/stackdep.h>
#define STACKSIZE 1000 /* stacksize for a thread */
#define NSTACKS 2 /* # stacks to be put in cache initialy */
struct lock {
int lock_locked;
cv_t lock_condvar;
mon_t lock_monitor;
};
#endif
#ifdef C_THREADS
#include <cthreads.h>
#endif
#ifdef __STDC__
#define _P(args) args
#define _P0() (void)
#define _P1(v,t) (t)
#define _P2(v1,t1,v2,t2) (t1,t2)
#else
#define _P(args) ()
#define _P0() ()
#define _P1(v,t) (v) t;
#define _P2(v1,t1,v2,t2) (v1,v2) t1; t2;
#endif
static int initialized;
int start_new_thread _P2(func, void (*func) _P((void *)), arg, void *arg)
{
#ifdef sun
thread_t tid;
#endif
#ifdef DEBUG
printf("start_new_thread called\n");
#endif
if (!initialized)
init_thread();
#ifdef __sgi
if (sproc(func, PR_SALL, arg) < 0)
return 0;
return 1;
#endif
#ifdef SOLARIS
(void) thread_create(0, 0, func, arg, THREAD_NEW_LWP);
#endif
#ifdef sun
if (lwp_create(&tid, func, MINPRIO, 0, lwp_newstk(), 1, arg) < 0)
return 0;
return 1;
#endif
#ifdef C_THREADS
(void) cthread_fork(func, arg);
#endif
}
#ifdef __sgi
void maybe_exit _P0()
{
if (exiting)
return;
exit_prog(0);
}
#endif
void exit_thread _P0()
{
#ifdef DEBUG
printf("exit_thread called\n");
#endif
if (!initialized)
exit(0);
#ifdef __sgi
exiting = 1;
exit(0);
#endif
#ifdef SOLARIS
thread_exit();
#endif
#ifdef sun
lwp_destroy(SELF);
#endif
#ifdef C_THREADS
cthread_exit(0);
#endif
}
#ifdef __sgi
static void exit_sig _P0()
{
#ifdef DEBUG
printf("exit_sig called\n");
#endif
if (do_exit) {
#ifdef DEBUG
printf("exiting in exit_sig\n");
#endif
exit(exit_status);
}
}
#endif
void init_thread _P0()
{
#ifdef __sgi
struct sigaction s;
#endif
#ifdef DEBUG
printf("init_thread called\n");
#endif
initialized = 1;
#ifdef __sgi
atexit(maybe_exit);
s.sa_handler = exit_sig;
sigemptyset(&s.sa_mask);
sigaddset(&s.sa_mask, SIGUSR1);
s.sa_flags = 0;
sigaction(SIGUSR1, &s, 0);
prctl(PR_SETEXITSIG, SIGUSR1);
usconfig(CONF_ARENATYPE, US_SHAREDONLY);
/*usconfig(CONF_LOCKTYPE, US_DEBUGPLUS);*/
shared_arena = usinit(tmpnam(0));
#endif
#ifdef sun
lwp_setstkcache(STACKSIZE, NSTACKS);
#endif
#ifdef C_THREADS
cthread_init();
#endif
}
type_lock allocate_lock _P0()
{
#ifdef __sgi
ulock_t lock;
#endif
#ifdef sun
struct lock *lock;
extern char *malloc();
#endif
#ifdef DEBUG
printf("allocate_lock called\n");
#endif
if (!initialized)
init_thread();
#ifdef __sgi
lock = usnewlock(shared_arena);
(void) usinitlock(lock);
#endif
#ifdef sun
lock = (struct lock *) malloc(sizeof(struct lock));
lock->lock_locked = 0;
(void) mon_create(&lock->lock_monitor);
(void) cv_create(&lock->lock_condvar, lock->lock_monitor);
#endif
#ifdef DEBUG
printf("allocate_lock() -> %lx\n", (long)lock);
#endif
return (type_lock) lock;
}
void free_lock _P1(lock, type_lock lock)
{
#ifdef DEBUG
printf("free_lock(%lx) called\n", (long)lock);
#endif
#ifdef __sgi
usfreelock((ulock_t) lock, shared_arena);
#endif
#ifdef sun
mon_destroy(((struct lock *) lock)->lock_monitor);
free((char *) lock);
#endif
}
int acquire_lock _P2(lock, type_lock lock, waitflag, int waitflag)
{
int success;
#ifdef DEBUG
printf("acquire_lock(%lx, %d) called\n", (long)lock, waitflag);
#endif
#ifdef __sgi
if (waitflag)
success = ussetlock((ulock_t) lock);
else
success = uscsetlock((ulock_t) lock, 1); /* Try it once */
#endif
#ifdef sun
success = 0;
(void) mon_enter(((struct lock *) lock)->lock_monitor);
if (waitflag)
while (((struct lock *) lock)->lock_locked)
cv_wait(((struct lock *) lock)->lock_condvar);
if (!((struct lock *) lock)->lock_locked) {
success = 1;
((struct lock *) lock)->lock_locked = 1;
}
cv_broadcast(((struct lock *) lock)->lock_condvar);
mon_exit(((struct lock *) lock)->lock_monitor);
#endif
#ifdef DEBUG
printf("acquire_lock(%lx, %d) -> %d\n", (long)lock, waitflag, success);
#endif
return success;
}
void release_lock _P1(lock, type_lock lock)
{
#ifdef DEBUG
printf("release lock(%lx) called\n", (long)lock);
#endif
#ifdef __sgi
(void) usunsetlock((ulock_t) lock);
#endif
#ifdef sun
(void) mon_enter(((struct lock *) lock)->lock_monitor);
((struct lock *) lock)->lock_locked = 0;
cv_broadcast(((struct lock *) lock)->lock_condvar);
mon_exit(((struct lock *) lock)->lock_monitor);
#endif
}
void exit_prog _P1(status, int status)
{
#ifdef DEBUG
printf("exit_prog(%d) called\n", status);
#endif
if (!initialized)
exit(status);
#ifdef __sgi
exiting = 1;
do_exit = 1;
exit_status = status;
exit(status);
#endif
#ifdef sun
pod_exit(status);
#endif
}
|
