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starting to work on Linux

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This commit is contained in:
rsc 2004-12-27 18:21:58 +00:00
parent e127e40bb1
commit 955a2ca78d
5 changed files with 80 additions and 19 deletions
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44
src/libthread/exec.c
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@ -6,26 +6,36 @@
static Lock thewaitlock;
static Channel *thewaitchan;
static Channel *dowaitchan;
static Channel *execchan;
Channel *_dowaitchan;
Channel *_threadexecchan;
Proc *_threadexecproc;
QLock _threadexeclock;
static void
execthread(void *v)
{
Execjob *e;
USED(v);
while((e = recvp(_threadexecchan)) != nil){
print("%d doexec pid %d\n", time(0), getpid());
sendul(e->c, _threadspawn(e->fd, e->cmd, e->argv));
}
}
static void
waitproc(void *v)
{
Channel *c;
Waitmsg *w;
Execjob *e;
_threadsetsysproc();
_threadexecproc = proc();
threadcreate(execthread, nil, 65536);
for(;;){
for(;;){
while((e = nbrecvp(execchan)) != nil)
sendul(e->c, _threadspawn(e->fd, e->cmd, e->argv));
if((w = wait()) != nil)
break;
while((w = wait()) == nil)
if(errno == ECHILD)
recvul(dowaitchan);
}
recvul(_dowaitchan);
if((c = thewaitchan) != nil)
sendp(c, w);
else
@ -94,20 +104,20 @@ _threadspawn(int fd[3], char *cmd, char *argv[])
close(fd[1]);
if(fd[2] != fd[1] && fd[2] != fd[0])
close(fd[2]);
channbsendul(dowaitchan, 1);
channbsendul(_dowaitchan, 1);
return pid;
}
int
threadspawn(int fd[3], char *cmd, char *argv[])
{
if(dowaitchan == nil){
if(_dowaitchan == nil){
lock(&thewaitlock);
if(dowaitchan == nil){
dowaitchan = chancreate(sizeof(ulong), 1);
chansetname(dowaitchan, "dowaitchan");
execchan = chancreate(sizeof(void*), 0);
chansetname(execchan, "execchan");
if(_dowaitchan == nil){
_dowaitchan = chancreate(sizeof(ulong), 1);
chansetname(_dowaitchan, "dowaitchan");
_threadexecchan = chancreate(sizeof(void*), 1);
chansetname(_threadexecchan, "execchan");
proccreate(waitproc, nil, STACK);
}
unlock(&thewaitlock);