RE: GHashTable strange behavior

[Stathis Gkotsis <stathisgotsis hotmail com>]

Forgot to mention that I am using Glib 2.42 on Linux.

----------------------------------------
> From: stathisgotsis hotmail com
> To: gtk-list gnome org
> Subject: GHashTable strange behavior
> Date: Wed, 4 Mar 2015 20:44:04 +0200
>
> Hi all,
>
> I am facing some strange behavior with GHashTable. When I use g_hash_table_insert to insert the same key 
> twice, it does not return FALSE, but TRUE:
>
> typedef struct {
> int a, b;
> } key_t;
>
> typedef struct {
> int a, b;
> } value_t;
>
> guint hash_func(gconstpointer key)
> {
> return hash((const char *)key, sizeof(key_t));
> }
>
> gboolean equal_func(gconstpointer a, gconstpointer b)
> {
> return (memcmp(a, b, sizeof(key_t)) == 0);
> }
>
> void destroy_key(gpointer data)
> {
> free(data);
> }
>
> void destroy_value(gpointer data)
> {
> free(data);
> }
>
> TEST_F(HashTableTests, test_add)
> {
>
> GHashTable *hash_table = g_hash_table_new_full(hash_func, equal_func, destroy_key, destroy_value);
>
> key_t *key1 = (key_t *)malloc(sizeof(*key1));
> value_t *value1 = (value_t *)malloc(sizeof(*value1));
>
> key_t *key2 = (key_t *)malloc(sizeof(*key2));
> value_t *value2 = (value_t *)malloc(sizeof(*value2));
>
> key1->a = 1;
> key1->b = 2;
> value1->a = 3;
> value1->b = 4;
>
> key2->a = 1;
> key2->b = 2;
> value2->a = 3;
> value2->b = 4;
>
> ASSERT_TRUE(g_hash_table_insert(hash_table, key1, value1));
>
> ASSERT_FALSE(g_hash_table_insert(hash_table, key2, value2)); // Assertion fails
>
> g_hash_table_destroy(hash_table);
> }
>
> Any ideas?
>
> BR,
> Stathis
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