From: phk <phk@d4fa192b-c00b-0410-8231-f00ffab90ce4>
Date: Mon, 25 Feb 2008 18:42:07 +0000 (+0000)
Subject: Explicitly initialize errno to zero before mutex ops.
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7113f83547b57735f2f158400313500fcc6635b1;p=varnish

Explicitly initialize errno to zero before mutex ops.


git-svn-id: svn+ssh://projects.linpro.no/svn/varnish/trunk@2538 d4fa192b-c00b-0410-8231-f00ffab90ce4
---

diff --git a/varnish-cache/bin/varnishd/cache.h b/varnish-cache/bin/varnishd/cache.h
index b0ca9ab2..e882dc9d 100644
--- a/varnish-cache/bin/varnishd/cache.h
+++ b/varnish-cache/bin/varnishd/cache.h
@@ -589,6 +589,7 @@ int RFC2616_cache_policy(const struct sess *sp, const struct http *hp);
 #define MTX_DESTROY(foo)	AZ(pthread_mutex_destroy(foo))
 #define TRYLOCK(foo, r)						\
 do {								\
+	errno = 0;						\
 	(r) = pthread_mutex_trylock(foo);			\
 	assert((r) == 0 || errno == EBUSY);			\
 	if (params->diag_bitmap & 0x8) {			\
@@ -599,6 +600,7 @@ do {								\
 } while (0)
 #define LOCK(foo) 						\
 do { 								\
+	errno = 0;						\
 	if (!(params->diag_bitmap & 0x18)) {			\
 		AZ(pthread_mutex_lock(foo)); 			\
 	} else if (pthread_mutex_trylock(foo)) {		\
@@ -614,6 +616,7 @@ do { 								\
 } while (0)
 #define UNLOCK(foo)						\
 do {								\
+	errno = 0;						\
 	AZ(pthread_mutex_unlock(foo));				\
 	if (params->diag_bitmap & 0x8)				\
 		VSL(SLT_Debug, 0,				\