static void *worker(void *_dummy)
{
worker_cleanup_t wc;
pth_msgport_t mp;
pth_event_t ev;
struct query *q;
int i;
fprintf(stderr, "worker: start\n");
wc.mp = mp = pth_msgport_create("worker");
wc.ev = ev = pth_event(PTH_EVENT_MSG, mp);
pth_cleanup_push(worker_cleanup, &wc);
for (;;) {
if ((i = pth_wait(ev)) != 1)
continue;
while ((q = (struct query *)pth_msgport_get(mp)) != NULL) {
fprintf(stderr, "worker: recv query <%s>\n", q->string);
for (i = 0; q->string[i] != NUL; i++)
q->string[i] = toupper(q->string[i]);
fprintf(stderr, "worker: send reply <%s>\n", q->string);
pth_msgport_reply((pth_message_t *)q);
}
}
return NULL;
}
static void *child(void *_arg)
{
sigset_t sigs;
char *name = (char *)_arg;
int i;
fprintf(stderr, "%s: enter\n", name);
/* establish cleanup handler */
pth_cleanup_push(child_cleanup, name);
/* block different types of signals */
pth_sigmask(SIG_SETMASK, NULL, &sigs);
sigaddset(&sigs, SIGINT);
if (strcmp(name, "child1") == 0) {
sigaddset(&sigs, SIGUSR1);
sigdelset(&sigs, SIGUSR2);
}
else {
sigdelset(&sigs, SIGUSR1);
sigaddset(&sigs, SIGUSR2);
}
pth_sigmask(SIG_SETMASK, &sigs, NULL);
/* do a little bit of processing and show signal states */
for (i = 0; i < 10; i++) {
pth_sigmask(SIG_SETMASK, NULL, &sigs);
fprintf(stderr, "%s: SIGUSR1: %s\n", name,
sigismember(&sigs, SIGUSR1) ? "blocked" : "unblocked");
fprintf(stderr, "%s: SIGUSR2: %s\n", name,
sigismember(&sigs, SIGUSR2) ? "blocked" : "unblocked");
fprintf(stderr, "%s: leave to scheduler\n", name);
pth_sleep(1);
fprintf(stderr, "%s: reentered from scheduler\n", name);
}
fprintf(stderr, "%s: leave\n", name);
return NULL;
}
