(empth_start, empth_init) [_EMPTH_POSIX]: Do not handle SIGALRM. We

don't raise it, and the signal handler is fishy.
(empth_alarm): Unused, remove.

include/empthread.h

@@ -205,7 +205,4 @@ void empth_sem_signal(empth_sem_t *sem);
  */
 void empth_sem_wait(empth_sem_t *sem);
 
-/* Internal function, not part of the thread abstraction */
-void empth_alarm(int);
-
 #endif

src/lib/empthread/lwp.c

@@ -126,10 +126,4 @@ empth_sem_wait(empth_sem_t *sm)
     lwpWait(sm);
 }
 
-void
-empth_alarm(int sig)
-{
-    /* no way we can be here while using LWP threads */
-    panic(sig);
-}
 #endif

src/lib/empthread/ntthread.c

@@ -569,20 +569,6 @@ empth_select(int fd, int flags)
     loc_RunThisThread();
 }
 
-/************************
- * empth_alarm
- */
-void
-empth_alarm(int sig)
-{
-    empth_t *pThread = TlsGetValue(dwTLSIndex);
-
-    loc_debug("got alarm signal  %d", sig);
-
-    /* Let it run if it is blocked like... */
-    SetEvent(pThread->hThreadEvent);
-}
-
 /************************
  * empth_wakeup
  *

src/lib/empthread/pthread.c

@@ -109,9 +109,6 @@ empth_start(void *arg)
     act.sa_handler = SIG_IGN;
     sigaction(SIGPIPE, &act, NULL);
 
-    act.sa_handler = empth_alarm;
-    sigaction(SIGALRM, &act, NULL);
-
     ctx->id = pthread_self();
     pthread_setspecific(ctx_key, ctx);
     pthread_mutex_lock(&mtx_ctxsw);
@@ -156,17 +153,11 @@ int
 empth_init(void **ctx_ptr, int flags)
 {
     empth_t *ctx;
-    struct sigaction act;
 
 
     pthread_key_create(&ctx_key, NULL);
     pthread_mutex_init(&mtx_ctxsw, NULL);
 
-    act.sa_flags = 0;
-    sigemptyset(&act.sa_mask);
-    act.sa_handler = empth_alarm;
-    sigaction(SIGALRM, &act, NULL);
-
     udata = ctx_ptr;
     ctx = malloc(sizeof(empth_t));
     if (!ctx) {
@@ -362,19 +353,6 @@ empth_select(int fd, int flags)
 }
 
 
-void
-empth_alarm(int sig)
-{
-    struct sigaction act;
-    empth_status("got alarm signal");
-#ifdef SA_RESTART
-    act.sa_flags &= ~SA_RESTART;
-#endif
-    sigemptyset(&act.sa_mask);
-    act.sa_handler = empth_alarm;
-    sigaction(SIGALRM, &act, NULL);
-}
-
 void
 empth_wakeup(empth_t *a)
 {