Add option to report stringshare usage (E17 use around 10000 differents strings).

SVN revision: 36658

legacy/eina/configure.ac

@@ -83,6 +83,25 @@ if test "x${enable_default_mempool}" = "xyes" ; then
 fi
 AC_SUBST(EINA_DEFAULT_MEMPOOL)
 
+# Report stringshare usage
+AC_ARG_ENABLE([stringshare-usage],
+   [AC_HELP_STRING([--enable-stringshare-usage], [Report stringshare usage on stringshare shutdown])],
+   [
+    if test "x${enableval}" = "xyes"; then
+       enable_stringshare_usage="yes"
+    else
+       enable_stringshare_usage="no"
+    fi
+   ],
+   [enable_stringshare_usage="no"]
+)
+AC_MSG_CHECKING([whether to report stringshare usage])
+AC_MSG_RESULT([${enable_stringshare_usage}])
+
+if test "x${enable_stringshare_usage}" = "xyes"; then
+   AC_DEFINE(EINA_STRINGSHARE_USAGE, 1, [Report Eina stringshare usage pattern])
+fi
+
 # Ememoa memory pool
 
 AC_ARG_ENABLE([ememoa],
@@ -341,6 +360,8 @@ echo "  Thread Support.......: ${have_pthread}"
 echo
 echo "  Magic debug..........: ${enable_magic_debug}"
 echo
+echo "  Report string usage..: ${enable_stringshare_usage}"
+echo
 echo "  Default mempool......: ${enable_default_mempool}"
 echo
 echo "  Memory pool:"

legacy/eina/src/lib/eina_stringshare.c

@@ -115,6 +115,10 @@ struct _Eina_Stringshare_Head
 
    int                    hash;
 
+#ifdef EINA_STRINGSHARE_USAGE
+   int                    population;
+#endif
+
    Eina_Stringshare_Node *head;
 };
 
@@ -133,6 +137,12 @@ struct _Eina_Stringshare_Node
 static Eina_Stringshare *share = NULL;
 static int _eina_stringshare_init_count = 0;
 
+#ifdef EINA_STRINGSHARE_USAGE
+static int population = 0;
+static int max_population = 0;
+static int max_node_population = 0;
+#endif
+
 static int
 _eina_stringshare_cmp(const Eina_Stringshare_Head *ed, const int *hash, __UNUSED__ int length, __UNUSED__ void *data)
 {
@@ -263,6 +273,12 @@ eina_stringshare_init()
 EAPI int
 eina_stringshare_shutdown()
 {
+#ifdef EINA_STRINGSHARE_USAGE
+   fprintf(stderr, "eina stringshare statistic:\n");
+   fprintf(stderr, " * maximum shared strings : %i\n", max_population);
+   fprintf(stderr, " * maximum shared strings per node : %i\n", max_node_population);
+#endif
+
    --_eina_stringshare_init_count;
    if (!_eina_stringshare_init_count)
      {
@@ -275,6 +291,12 @@ eina_stringshare_shutdown()
 	  }
 	MAGIC_FREE(share);
 
+#ifdef EINA_STRINGSHARE_USAGE
+	population = 0;
+	max_node_population = 0;
+	max_population = 0;
+#endif
+
 	eina_magic_string_shutdown();
 	eina_error_shutdown();
      }
@@ -322,6 +344,10 @@ eina_stringshare_add(const char *str)
 	ed->hash = hash;
 	ed->head = NULL;
 
+#ifdef EINA_STRINGSHARE_USAGE
+	ed->population = 0;
+#endif
+
 	share->buckets[hash_num] = (Eina_Stringshare_Head*) eina_rbtree_inline_insert((Eina_Rbtree*) share->buckets[hash_num],
 										      EINA_RBTREE_GET(ed),
 										      EINA_RBTREE_CMP_NODE_CB(_eina_stringshare_node), NULL);
@@ -370,6 +396,13 @@ eina_stringshare_add(const char *str)
    nel->next = ed->head;
    ed->head = nel;
 
+#ifdef EINA_STRINGSHARE_USAGE
+   ed->population++;
+   population++;
+   if (population > max_population) max_population = population;
+   if (ed->population > max_node_population) max_node_population = ed->population;
+#endif
+
    return el_str;
 }
 
@@ -420,6 +453,11 @@ eina_stringshare_del(const char *str)
 	if (el->begin == EINA_FALSE)
 	  MAGIC_FREE(el);
 
+#ifdef EINA_STRINGSHARE_USAGE
+	ed->population--;
+	population--;
+#endif
+
 	if (ed->head == NULL)
 	  {
 	     share->buckets[hash_num] = (Eina_Stringshare_Head*) eina_rbtree_inline_remove(EINA_RBTREE_GET(share->buckets[hash_num]),

legacy/eina/src/tests/eina_test_stringshare.c

@@ -141,6 +141,9 @@ START_TEST(eina_stringshare_collision)
    for (i = 0; i < 200; ++i)
      eina_stringshare_del(eina_array_data_get(ea, i));
 
+   for (i = 0; i < 1000; ++i)
+     eina_stringshare_del(eina_array_pop(ea));
+
    eina_stringshare_shutdown();
 
    eina_array_free(ea);