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ghash: Allow tweaking hash table shift by environment variable

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The shift controls the capacity of the hash table before it needs to
be resized.

This commit makes the shift configurable through the

G_HASH_TABLE_MIN_SHIFT

environment variable.
This commit is contained in:
Ray Strode 2021-05-10 16:02:31 -04:00
parent a97d9c6389
commit a4b72a282c
1 changed files with 2 additions and 2 deletions
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4
glib/ghash.c
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@ -206,7 +206,7 @@
* release of GLib. It does nothing.
*/
#define HASH_TABLE_MIN_SHIFT 3 /* 1 << 3 == 8 buckets */
static int HASH_TABLE_MIN_SHIFT = 3;
#define UNUSED_HASH_VALUE 0
#define TOMBSTONE_HASH_VALUE 1
@ -714,7 +714,7 @@ g_hash_table_new_full (GHashFunc hash_func,
GDestroyNotify value_destroy_func)
{
GHashTable *hash_table;
HASH_TABLE_MIN_SHIFT = atoi(getenv ("G_HASH_TABLE_MIN_SHIFT")? : "3");
hash_table = g_slice_new (GHashTable);
g_hash_table_set_shift (hash_table, HASH_TABLE_MIN_SHIFT);
hash_table->nnodes = 0;