plan9front/sys/src/libthread/exit.c

73 lines
1.3 KiB
C

#include <u.h>
#include <libc.h>
#include <thread.h>
#include "threadimpl.h"
#include <tos.h>
char *_threadexitsallstatus;
Channel *_threadwaitchan;
void
threadexits(char *exitstr)
{
Proc *p;
Thread *t;
p = _threadgetproc();
t = p->thread;
t->moribund = 1;
if(exitstr==nil)
exitstr="";
utfecpy(p->exitstr, p->exitstr+ERRMAX, exitstr);
_sched();
}
void
threadexitsall(char *exitstr)
{
Proc *p;
int pid[64];
int i, npid, mypid;
if(exitstr == nil)
exitstr = "";
_threadexitsallstatus = exitstr;
_threaddebug(DBGSCHED, "_threadexitsallstatus set to %p", _threadexitsallstatus);
mypid = _tos->pid; //getpid();
/*
* signal others.
* copying all the pids first avoids other threads
* teardown procedures getting in the way.
*
* avoid mallocs since malloc can post a note which can
* call threadexitsall...
*/
for(;;){
lock(&_threadpq.lock);
npid = 0;
for(p = _threadpq.head; p && npid < nelem(pid); p=p->next){
if(p->threadint == 0 && p->pid != mypid){
pid[npid++] = p->pid;
p->threadint = 1;
}
}
unlock(&_threadpq.lock);
if(npid == 0)
break;
for(i=0; i<npid; i++)
postnote(PNPROC, pid[i], "threadint");
}
/* leave */
exits(exitstr);
}
Channel*
threadwaitchan(void)
{
if(_threadwaitchan==nil)
_threadwaitchan = chancreate(sizeof(Waitmsg*), 16);
return _threadwaitchan;
}