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
|
#include <stdlib.h>
#include <lwp/lwp.h>
#include <lwp/stackdep.h>
#define STACKSIZE 1000 /* stacksize for a thread */
#define NSTACKS 2 /* # stacks to be put in cache initially */
struct lock {
int lock_locked;
cv_t lock_condvar;
mon_t lock_monitor;
};
/*
* Initialization.
*/
static void PyThread__init_thread(void)
{
lwp_setstkcache(STACKSIZE, NSTACKS);
}
/*
* Thread support.
*/
long PyThread_start_new_thread(void (*func)(void *), void *arg)
{
thread_t tid;
int success;
dprintf(("PyThread_start_new_thread called\n"));
if (!initialized)
PyThread_init_thread();
success = lwp_create(&tid, func, MINPRIO, 0, lwp_newstk(), 1, arg);
return success < 0 ? -1 : 0;
}
long PyThread_get_thread_ident(void)
{
thread_t tid;
if (!initialized)
PyThread_init_thread();
if (lwp_self(&tid) < 0)
return -1;
return tid.thread_id;
}
void PyThread_exit_thread(void)
{
dprintf(("PyThread_exit_thread called\n"));
if (!initialized)
exit(0);
lwp_destroy(SELF);
}
/*
* Lock support.
*/
PyThread_type_lock PyThread_allocate_lock(void)
{
struct lock *lock;
extern char *malloc(size_t);
dprintf(("PyThread_allocate_lock called\n"));
if (!initialized)
PyThread_init_thread();
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);
dprintf(("PyThread_allocate_lock() -> %p\n", lock));
return (PyThread_type_lock) lock;
}
void PyThread_free_lock(PyThread_type_lock lock)
{
dprintf(("PyThread_free_lock(%p) called\n", lock));
mon_destroy(((struct lock *) lock)->lock_monitor);
free((char *) lock);
}
int PyThread_acquire_lock(PyThread_type_lock lock, int waitflag)
{
int success;
dprintf(("PyThread_acquire_lock(%p, %d) called\n", lock, waitflag));
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);
dprintf(("PyThread_acquire_lock(%p, %d) -> %d\n", lock, waitflag, success));
return success;
}
void PyThread_release_lock(PyThread_type_lock lock)
{
dprintf(("PyThread_release_lock(%p) called\n", lock));
(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);
}
|
GitWeb