posix: upgrade libevent from 1.4.7 to 1.4.13

third_party/libevent/signal.c

Index: third_party/libevent/signal.c
diff --git a/third_party/libevent/signal.c b/third_party/libevent/signal.c
index bcaa3f9b5f3dff9fb26073d9e44e447d48aa97ab..74fa23f688aba29aad777e2ead99933b9b2ce869 100644
--- a/third_party/libevent/signal.c
+++ b/third_party/libevent/signal.c
@@ -71,7 +71,7 @@ static void evsignal_handler(int sig);
 static void
 evsignal_cb(int fd, short what, void *arg)
 {
-	static char signals[100];
+	static char signals[1];
 #ifdef WIN32
 	SSIZE_T n;
 #else
@@ -92,7 +92,7 @@ evsignal_cb(int fd, short what, void *arg)
 #define FD_CLOSEONEXEC(x)
 #endif
 
-void
+int
 evsignal_init(struct event_base *base)
 {
 	int i;
@@ -103,8 +103,16 @@ evsignal_init(struct event_base *base)
 	 * signals that got delivered.
 	 */
 	if (evutil_socketpair(
-		    AF_UNIX, SOCK_STREAM, 0, base->sig.ev_signal_pair) == -1)
+		    AF_UNIX, SOCK_STREAM, 0, base->sig.ev_signal_pair) == -1) {
+#ifdef WIN32
+		/* Make this nonfatal on win32, where sometimes people
+		   have localhost firewalled. */
+		event_warn("%s: socketpair", __func__);
+#else
 		event_err(1, "%s: socketpair", __func__);
+#endif
+		return -1;
+	}
 
 	FD_CLOSEONEXEC(base->sig.ev_signal_pair[0]);
 	FD_CLOSEONEXEC(base->sig.ev_signal_pair[1]);
@@ -122,6 +130,8 @@ evsignal_init(struct event_base *base)
 		EV_READ | EV_PERSIST, evsignal_cb, &base->sig.ev_signal);
 	base->sig.ev_signal.ev_base = base;
 	base->sig.ev_signal.ev_flags |= EVLIST_INTERNAL;
+
+	return 0;
 }
 
 /* Helper: set the signal handler for evsignal to handler in base, so that
@@ -310,6 +320,7 @@ evsignal_process(struct event_base *base)
 		ncalls = sig->evsigcaught[i];
 		if (ncalls == 0)
 			continue;
+		sig->evsigcaught[i] -= ncalls;
 
 		for (ev = TAILQ_FIRST(&sig->evsigevents[i]);
 		    ev != NULL; ev = next_ev) {
@@ -319,7 +330,6 @@ evsignal_process(struct event_base *base)
 			event_active(ev, EV_SIGNAL, ncalls);
 		}
 
-		sig->evsigcaught[i] = 0;
 	}
 }