thread.c
1.48 KB
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
/**************************************************************************
* *
* Copyright (C) 1994, Silicon Graphics, Inc. *
* *
* These coded instructions, statements, and computer programs contain *
* unpublished proprietary information of Silicon Graphics, Inc., and *
* are protected by Federal copyright law. They may not be disclosed *
* to third parties or copied or duplicated in any form, in whole or *
* in part, without the prior written consent of Silicon Graphics, Inc. *
* *
**************************************************************************/
#include <R4300.h>
#include "osint.h"
/*
* A sentinel to mark the end of thread queues.
* It makes thread enqueuing more efficient.
*/
__OSThreadTail __osThreadTail = {
(OSThread *)NULL,
-1
};
OSThread *__osRunQueue = (OSThread *)&__osThreadTail;
OSThread *__osActiveQueue = (OSThread *)&__osThreadTail;
OSThread *__osRunningThread = (OSThread *)NULL;
OSThread *__osFaultedThread = (OSThread *)NULL;
/*
* __osDequeueThread
*
* Find and remove the given thread from the given queue.
*/
void
__osDequeueThread(register OSThread **queue, register OSThread *t)
{
register OSThread *pred, *succ;
pred = (OSThread *)queue;
succ = pred->next;
while (succ != (OSThread *)NULL) {
if (succ == t) { /* in the queue */
pred->next = t->next; /* remove it */
#ifdef _DEBUG
t->next = (OSThread *)NULL;
#endif
return;
}
pred = succ;
succ = pred->next;
}
}