* Add some use documentation to the daemon

[catta] / avahi-core / cache.c

diff --git a/avahi-core/cache.c b/avahi-core/cache.c
index c5e7e319e9bcc6ece613238bf0fc646db57b2bf8..8f9ffafdab41090525a42f347de86ec970c753f7 100644 (file)
--- a/avahi-core/cache.c
+++ b/avahi-core/cache.c
@@ -28,6 +28,8 @@
 #include "util.h"
 #include "cache.h"
 
+#define AVAHI_MAX_CACHE_ENTRIES 200
+
 static void remove_entry(AvahiCache *c, AvahiCacheEntry *e) {
     AvahiCacheEntry *t;
 
@@ -55,6 +57,8 @@ static void remove_entry(AvahiCache *c, AvahiCacheEntry *e) {
     avahi_record_unref(e->record);
     
     g_free(e);
+
+    g_assert(c->n_entries-- >= 1);
 }
 
 AvahiCache *avahi_cache_new(AvahiServer *server, AvahiInterface *iface) {
@@ -67,6 +71,7 @@ AvahiCache *avahi_cache_new(AvahiServer *server, AvahiInterface *iface) {
     c->hash_table = g_hash_table_new((GHashFunc) avahi_key_hash, (GEqualFunc) avahi_key_equal);
 
     AVAHI_LLIST_HEAD_INIT(AvahiCacheEntry, c->entries);
+    c->n_entries = 0;
     
     return c;
 }
@@ -76,6 +81,7 @@ void avahi_cache_free(AvahiCache *c) {
 
     while (c->entries)
         remove_entry(c, c->entries);
+    g_assert(c->n_entries == 0);
     
     g_hash_table_destroy(c->hash_table);
     
@@ -230,7 +236,7 @@ static void expire_in_one_second(AvahiCache *c, AvahiCacheEntry *e) {
     update_time_event(c, e);
 }
 
-void avahi_cache_update(AvahiCache *c, AvahiRecord *r, gboolean unique, const AvahiAddress *a) {
+void avahi_cache_update(AvahiCache *c, AvahiRecord *r, gboolean cache_flush, const AvahiAddress *a) {
 /*     gchar *txt; */
     
     g_assert(c);
@@ -257,7 +263,7 @@ void avahi_cache_update(AvahiCache *c, AvahiRecord *r, gboolean unique, const Av
 
         if ((first = avahi_cache_lookup_key(c, r->key))) {
             
-            if (unique) {
+            if (cache_flush) {
 
                 /* For unique entries drop all entries older than one second */
                 for (e = first; e; e = e->by_key_next) {
@@ -288,11 +294,16 @@ void avahi_cache_update(AvahiCache *c, AvahiRecord *r, gboolean unique, const Av
             /* Update the record */
             avahi_record_unref(e->record);
             e->record = avahi_record_ref(r);
-            
+
         } else {
             /* No entry found, therefore we create a new one */
             
 /*             g_message("couldn't find matching cache entry");  */
+
+            if (c->n_entries >= AVAHI_MAX_CACHE_ENTRIES)
+                return;
+
+            c->n_entries++;
             
             e = g_new(AvahiCacheEntry, 1);
             e->cache = c;
@@ -314,6 +325,7 @@ void avahi_cache_update(AvahiCache *c, AvahiRecord *r, gboolean unique, const Av
         e->timestamp = now;
         next_expiry(c, e, 80);
         e->state = AVAHI_CACHE_VALID;
+        e->cache_flush = cache_flush;
     }
 }