Introduce VSL_Close() function so the same process can check

multiple varnish's shmem sequentially.

Eventually, we may want to have a descriptor so one process can
check multiple varnish's shmem at the same time.



git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@3975 d4fa192b-c00b-0410-8231-f00ffab90ce4

include/varnishapi.h

@@ -57,6 +57,7 @@ void VSL_NonBlocking(struct VSL_data *vd, int nb);
 int VSL_Dispatch(struct VSL_data *vd, vsl_handler *func, void *priv);
 int VSL_NextLog(struct VSL_data *lh, unsigned char **pp);
 int VSL_Arg(struct VSL_data *vd, int arg, const char *opt);
+void VSL_Close(void);
 struct varnish_stats *VSL_OpenStats(const char *varnish_name);
 const char *VSL_Name(void);
 extern const char *VSL_tags[256];

lib/libvarnishapi/shmlog.c

@@ -560,6 +560,18 @@ VSL_OpenStats(const char *varnish_name)
 	return (&vsl_lh->stats);
 }
 
+void
+VSL_Close(void)
+{
+	if (vsl_lh == NULL)
+		return;
+	assert(0 == munmap(vsl_lh, vsl_lh->size + sizeof *vsl_lh));
+	vsl_lh = NULL;
+	assert(vsl_fd >= 0);
+	assert(0 == close(vsl_fd));
+	vsl_fd = -1;
+}
+
 const char *
 VSL_Name(void)
 {