[libvirt] [PATCH v1 02/21] util: arptable: use VIR_AUTOFREE instead of VIR_FREE for scalar types

[Sukrit Bhatnagar]

By making use of the GCC's __attribute__((cleanup)) handled by VIR_AUTOFREE
macro, majority of the VIR_FREE calls can be dropped, which in turn leads to
getting rid of most of our cleanup sections.
---
 src/util/virarptable.c | 14 +++-----------
 1 file changed, 3 insertions(+), 11 deletions(-)

diff --git a/src/util/virarptable.c b/src/util/virarptable.c
index c0e90dc..bf40267 100644
--- a/src/util/virarptable.c
+++ b/src/util/virarptable.c
@@ -71,9 +71,8 @@ virArpTableGet(void)
 {
     int num = 0;
     int msglen;
-    void *nlData = NULL;
+    VIR_AUTOFREE(void *) nlData = NULL;
     virArpTablePtr table = NULL;
-    char *ipstr = NULL;
     struct nlmsghdr* nh;
     struct rtattr * tb[NDA_MAX+1];
 
@@ -89,6 +88,7 @@ virArpTableGet(void)
     VIR_WARNINGS_NO_CAST_ALIGN
     for (; NLMSG_OK(nh, msglen); nh = NLMSG_NEXT(nh, msglen)) {
         VIR_WARNINGS_RESET
+        VIR_AUTOFREE(char *) ipstr = NULL;
         struct ndmsg *r = NLMSG_DATA(nh);
         int len = nh->nlmsg_len;
         void *addr;
@@ -108,7 +108,7 @@ virArpTableGet(void)
             continue;
 
         if (nh->nlmsg_type == NLMSG_DONE)
-            goto end_of_netlink_messages;
+            return table;
 
         VIR_WARNINGS_NO_CAST_ALIGN
         parse_rtattr(tb, NDA_MAX, NDA_RTA(r),
@@ -134,8 +134,6 @@ virArpTableGet(void)
 
             if (VIR_STRDUP(table->t[num].ipaddr, ipstr) < 0)
                 goto cleanup;
-
-            VIR_FREE(ipstr);
         }
 
         if (tb[NDA_LLADDR]) {
@@ -154,14 +152,8 @@ virArpTableGet(void)
         }
     }
 
- end_of_netlink_messages:
-    VIR_FREE(nlData);
-    return table;
-
  cleanup:
     virArpTableFree(table);
-    VIR_FREE(ipstr);
-    VIR_FREE(nlData);
     return NULL;
 }
 
-- 
1.8.3.1