Register signal 33 explicitly as reserved by real-time library, and

use it by its new name (SIGLIBRT) rather than internal definition
in librt (SIGSERVICE).

Approved by:	davidxu, arch

lib/librt/sigev_thread.c

@@ -224,11 +224,11 @@ __sigev_get_sigevent(struct sigev_node *sn, struct sigevent *newevp,
 	sigev_id_t id)
 {
 	/*
-	 * Build a new sigevent, and tell kernel to deliver SIGSERVICE
+	 * Build a new sigevent, and tell kernel to deliver SIGLIBRT
 	 * signal to the new thread.
 	 */
 	newevp->sigev_notify = SIGEV_THREAD_ID;
-	newevp->sigev_signo  = SIGSERVICE;
+	newevp->sigev_signo  = SIGLIBRT;
 	newevp->sigev_notify_thread_id = (lwpid_t)sn->sn_tn->tn_lwpid;
 	newevp->sigev_value.sival_ptr = (void *)id;
 }
@@ -279,7 +279,7 @@ __sigev_delete_node(struct sigev_node *sn)
 	LIST_REMOVE(sn, sn_link);
 
 	if (--sn->sn_tn->tn_refcount == 0)
-		_pthread_kill(sn->sn_tn->tn_thread, SIGSERVICE);
+		_pthread_kill(sn->sn_tn->tn_thread, SIGLIBRT);
 	if (sn->sn_flags & SNF_WORKING)
 		sn->sn_flags |= SNF_REMOVED;
 	else
@@ -326,7 +326,7 @@ sigev_thread_create(int usedefault)
 	LIST_INSERT_HEAD(&sigev_threads, tn, tn_link);
 	__sigev_list_unlock();
 
-	sigfillset(&set);	/* SIGSERVICE is masked. */
+	sigfillset(&set);	/* SIGLIBRT is masked. */
 	sigdelset(&set, SIGBUS);
 	sigdelset(&set, SIGILL);
 	sigdelset(&set, SIGFPE);
@@ -378,7 +378,7 @@ sigev_service_loop(void *arg)
 	__sigev_list_unlock();
 
 	sigemptyset(&set);
-	sigaddset(&set, SIGSERVICE);
+	sigaddset(&set, SIGLIBRT);
 	for (;;) {
 		ret = sigwaitinfo(&set, &si);
 

lib/librt/sigev_thread.h

@@ -67,8 +67,6 @@ struct sigev_thread {
 #define	SNF_REMOVED		0x02
 #define	SNF_SYNC		0x04
 
-#define	SIGSERVICE		(SIGTHR+1)
-
 int	__sigev_check_init();
 struct sigev_node *__sigev_alloc(int, const struct sigevent *,
 	struct sigev_node *, int);

sys/sys/signal.h

@@ -111,6 +111,7 @@
 #if __BSD_VISIBLE
 #define	SIGTHR		32	/* reserved by thread library. */
 #define	SIGLWP		SIGTHR
+#define	SIGLIBRT	33	/* reserved by real-time library. */
 #endif
 
 #define	SIGRTMIN	65