From: Guus Sliepen <guus@tinc-vpn.org>
Date: Fri, 15 Jan 2010 22:41:14 +0000 (+0100)
Subject: Optimise handling of select() returning <= 0.
X-Git-Tag: import-tinc-1.1~558^2~25
X-Git-Url: https://git.meshlink.io/?a=commitdiff_plain;h=b1945f70fe993ca447555a1e27f35638b0c1fd8b;p=meshlink

Optimise handling of select() returning <= 0.

Before, we immediately retried select() if it returned -1 and errno is EAGAIN
or EINTR, and if it returned 0 it would check for network events even if we
know there are none.  Now, if -1 or 0 is returned we skip checking network
events, but we do check for timer and signal events.
---

diff --git a/src/net.c b/src/net.c
index 9b60a314..f24d18ad 100644
--- a/src/net.c
+++ b/src/net.c
@@ -374,11 +374,10 @@ int main_loop(void) {
 				dump_connections();
 				return 1;
 			}
-
-			continue;
 		}
 
-		check_network_activity(&readset, &writeset);
+		if(r > 0)
+			check_network_activity(&readset, &writeset);
 
 		if(do_purge) {
 			purge();