blob: bc4efd276ac21e63455814bf88b92ea10831e125 (
plain)
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
|
/*
* Thread library.
*/
#include "threadimpl.h"
typedef struct Mainarg Mainarg;
struct Mainarg
{
int argc;
char **argv;
};
int mainstacksize;
extern void (*_sysfatal)(char*, va_list);
extern Jmp *(*_notejmpbuf)(void);
static void
mainlauncher(void *arg)
{
Mainarg *a;
a = arg;
_kmaininit();
threadmain(a->argc, a->argv);
threadexits("threadmain");
}
int
main(int argc, char **argv)
{
Mainarg a;
Proc *p;
/*
* In pthreads, threadmain is actually run in a subprocess,
* so that the main process can exit (if threaddaemonize is called).
* The main process relays notes to the subprocess.
* _Threadbackgroundsetup will return only in the subprocess.
*/
_threadbackgroundinit();
/*
* Instruct QLock et al. to use our scheduling functions
* so that they can operate at the thread level.
*/
_qlockinit(_threadsleep, _threadwakeup);
/*
* Install our own _threadsysfatal which takes down
* the whole confederation of procs.
*/
_sysfatal = _threadsysfatal;
/*
* Install our own jump handler.
*/
_notejmpbuf = _threadgetjmp;
/*
* Install our own signal handler.
*/
notify(_threadnote);
/*
* Construct the initial proc running mainlauncher(&a).
*/
if(mainstacksize == 0)
mainstacksize = 32*1024;
a.argc = argc;
a.argv = argv;
p = _newproc();
_newthread(p, mainlauncher, &a, mainstacksize, "threadmain", 0);
_threadscheduler(p);
abort(); /* not reached */
return 0;
}
/*
* No-op function here so that sched.o drags in main.o.
*/
void
_threadlinkmain(void)
{
}
Jmp*
_threadgetjmp(void)
{
static Jmp j;
Proc *p;
p = _threadgetproc();
if(p == nil)
return &j;
return &p->sigjmp;
}
|