static void
do_rehash (GHashTable *hash)
{
int current_size, i;
Slot **table;
/* printf ("Resizing diff=%d slots=%d\n", hash->in_use - hash->last_rehash, hash->table_size); */
hash->last_rehash = hash->table_size;
current_size = hash->table_size;
hash->table_size = g_spaced_primes_closest (hash->in_use);
/* printf ("New size: %d\n", hash->table_size); */
table = hash->table;
hash->table = g_new0 (Slot *, hash->table_size);
for (i = 0; i < current_size; i++){
Slot *s, *next;
for (s = table [i]; s != NULL; s = next){
guint hashcode = ((*hash->hash_func) (s->key)) % hash->table_size;
next = s->next;
s->next = hash->table [hashcode];
hash->table [hashcode] = s;
}
}
g_free (table);
}
static void
rehash (SgenHashTable *hash_table)
{
SgenHashTableEntry **old_hash = hash_table->table;
guint old_hash_size = hash_table->size;
guint i, hash, new_size;
SgenHashTableEntry **new_hash;
SgenHashTableEntry *entry, *next;
if (!old_hash) {
sgen_register_fixed_internal_mem_type (hash_table->entry_mem_type,
sizeof (SgenHashTableEntry*) + sizeof (gpointer) + hash_table->data_size);
new_size = 13;
} else {
new_size = g_spaced_primes_closest (hash_table->num_entries);
}
new_hash = sgen_alloc_internal_dynamic (new_size * sizeof (SgenHashTableEntry*), hash_table->table_mem_type);
for (i = 0; i < old_hash_size; ++i) {
for (entry = old_hash [i]; entry; entry = next) {
hash = hash_table->hash_func (entry->key) % new_size;
next = entry->next;
entry->next = new_hash [hash];
new_hash [hash] = entry;
}
}
sgen_free_internal_dynamic (old_hash, old_hash_size * sizeof (SgenHashTableEntry*), hash_table->table_mem_type);
hash_table->table = new_hash;
hash_table->size = new_size;
}
/*
* g_hash_table_resize:
* @hash_table: our #GHashTable
*
* Resizes the hash table to the optimal size based on the number of
* nodes currently held. If you call this function then a resize will
* occur, even if one does not need to occur. Use
* g_hash_table_maybe_resize() instead.
*/
static void
g_hash_table_resize (GHashTable *hash_table)
{
GHashNode **new_nodes;
GHashNode *node;
GHashNode *next;
guint hash_val;
gint new_size;
gint i;
new_size = g_spaced_primes_closest (hash_table->nnodes);
new_size = CLAMP (new_size, HASH_TABLE_MIN_SIZE, HASH_TABLE_MAX_SIZE);
new_nodes = g_new0 (GHashNode*, new_size);
for (i = 0; i < hash_table->size; i++)
for (node = hash_table->nodes[i]; node; node = next)
{
next = node->next;
hash_val = node->key_hash % new_size;
node->next = new_nodes[hash_val];
new_nodes[hash_val] = node;
}
g_free (hash_table->nodes);
hash_table->nodes = new_nodes;
hash_table->size = new_size;
}
static void
rehash (MonoGHashTable *hash)
{
MONO_REQ_GC_UNSAFE_MODE; //we must run in unsafe mode to make rehash safe
int diff = ABS (hash->last_rehash - hash->in_use);
RehashData data;
void *old_table G_GNUC_UNUSED; /* unused on Boehm */
/* These are the factors to play with to change the rehashing strategy */
/* I played with them with a large range, and could not really get */
/* something that was too good, maybe the tests are not that great */
if (!(diff * 0.75 > hash->table_size * 2))
return;
data.hash = hash;
data.new_size = g_spaced_primes_closest (hash->in_use);
data.table = mg_new0 (Slot *, data.new_size);
if (!mono_threads_is_coop_enabled ()) {
old_table = mono_gc_invoke_with_gc_lock (do_rehash, &data);
} else {
/* We cannot be preempted */
old_table = do_rehash (&data);
}
mg_free (old_table);
}
/* LOCKING: assumes the GC lock is held */
static void
rehash_dislink (DisappearingLinkHashTable *hash_table)
{
DisappearingLink **disappearing_link_hash = hash_table->table;
int disappearing_link_hash_size = hash_table->size;
int i;
unsigned int hash;
DisappearingLink **new_hash;
DisappearingLink *entry, *next;
int new_size = g_spaced_primes_closest (hash_table->num_links);
new_hash = mono_sgen_alloc_internal_dynamic (new_size * sizeof (DisappearingLink*), INTERNAL_MEM_DISLINK_TABLE);
for (i = 0; i < disappearing_link_hash_size; ++i) {
for (entry = disappearing_link_hash [i]; entry; entry = next) {
hash = mono_aligned_addr_hash (entry->link) % new_size;
next = entry->next;
entry->next = new_hash [hash];
new_hash [hash] = entry;
}
}
mono_sgen_free_internal_dynamic (disappearing_link_hash,
disappearing_link_hash_size * sizeof (DisappearingLink*), INTERNAL_MEM_DISLINK_TABLE);
hash_table->table = new_hash;
hash_table->size = new_size;
}
MonoGHashTable *
mono_g_hash_table_new_type (GHashFunc hash_func, GEqualFunc key_equal_func, MonoGHashGCType type, MonoGCRootSource source, void *key, const char *msg)
{
MonoGHashTable *hash;
if (!hash_func)
hash_func = g_direct_hash;
hash = g_new0 (MonoGHashTable, 1);
hash->hash_func = hash_func;
hash->key_equal_func = key_equal_func;
hash->table_size = g_spaced_primes_closest (1);
hash->keys = g_new0 (MonoObject*, hash->table_size);
hash->values = g_new0 (MonoObject*, hash->table_size);
hash->gc_type = type;
hash->source = source;
hash->key = key;
hash->msg = msg;
if (type > MONO_HASH_KEY_VALUE_GC)
g_error ("wrong type for gc hashtable");
if (hash->gc_type & MONO_HASH_KEY_GC)
mono_gc_register_root_wbarrier ((char*)hash->keys, sizeof (MonoObject*) * hash->table_size, mono_gc_make_vector_descr (), hash->source, hash->key, hash->msg);
if (hash->gc_type & MONO_HASH_VALUE_GC)
mono_gc_register_root_wbarrier ((char*)hash->values, sizeof (MonoObject*) * hash->table_size, mono_gc_make_vector_descr (), hash->source, hash->key, hash->msg);
return hash;
}
GHashTable *
g_hash_table_new (GHashFunc hash_func, GEqualFunc key_equal_func)
{
GHashTable *hash;
if (hash_func == NULL)
hash_func = g_direct_hash;
if (key_equal_func == NULL)
key_equal_func = g_direct_equal;
hash = g_new0 (GHashTable, 1);
hash->hash_func = hash_func;
hash->key_equal_func = key_equal_func;
hash->table_size = g_spaced_primes_closest (1);
hash->table = g_new0 (Slot *, hash->table_size);
hash->last_rehash = hash->table_size;
return hash;
}
static void
rehash (MonoGHashTable *hash)
{
int diff = ABS (hash->last_rehash - hash->in_use);
RehashData data;
void *old_table;
/* These are the factors to play with to change the rehashing strategy */
/* I played with them with a large range, and could not really get */
/* something that was too good, maybe the tests are not that great */
if (!(diff * 0.75 > hash->table_size * 2))
return;
data.hash = hash;
data.new_size = g_spaced_primes_closest (hash->in_use);
data.table = mg_new0 (Slot *, data.new_size);
old_table = mono_gc_invoke_with_gc_lock (do_rehash, &data);
mg_free (old_table);
}
static void
rehash (MonoGHashTable *hash)
{
MONO_REQ_GC_UNSAFE_MODE; //we must run in unsafe mode to make rehash safe
RehashData data;
void *old_keys = hash->keys;
void *old_values = hash->values;
data.hash = hash;
/*
* Rehash to a size that can fit the current elements. Rehash relative to in_use
* to allow also for compaction.
*/
data.new_size = g_spaced_primes_closest (hash->in_use / HASH_TABLE_MAX_LOAD_FACTOR * HASH_TABLE_RESIZE_RATIO);
data.keys = g_new0 (MonoObject*, data.new_size);
data.values = g_new0 (MonoObject*, data.new_size);
if (hash->gc_type & MONO_HASH_KEY_GC)
mono_gc_register_root_wbarrier ((char*)data.keys, sizeof (MonoObject*) * data.new_size, mono_gc_make_vector_descr (), hash->source, hash->key, hash->msg);
if (hash->gc_type & MONO_HASH_VALUE_GC)
mono_gc_register_root_wbarrier ((char*)data.values, sizeof (MonoObject*) * data.new_size, mono_gc_make_vector_descr (), hash->source, hash->key, hash->msg);
if (!mono_threads_are_safepoints_enabled ()) {
mono_gc_invoke_with_gc_lock (do_rehash, &data);
} else {
/* We cannot be preempted */
do_rehash (&data);
}
if (hash->gc_type & MONO_HASH_KEY_GC)
mono_gc_deregister_root ((char*)old_keys);
if (hash->gc_type & MONO_HASH_VALUE_GC)
mono_gc_deregister_root ((char*)old_values);
g_free (old_keys);
g_free (old_values);
}
static void
g_hash_table_resize (MonoGHashTable *hash_table)
{
MonoGHashNode **new_nodes;
MonoGHashNode *node;
MonoGHashNode *next;
guint hash_val;
gint new_size;
gint i;
new_size = g_spaced_primes_closest (hash_table->nnodes);
new_size = CLAMP (new_size, HASH_TABLE_MIN_SIZE, HASH_TABLE_MAX_SIZE);
#if HAVE_BOEHM_GC
new_nodes = GC_MALLOC (sizeof (MonoGHashNode*) * new_size);
#else
new_nodes = g_new0 (MonoGHashNode*, new_size);
#endif
for (i = 0; i < hash_table->size; i++)
for (node = hash_table->nodes[i]; node; node = next)
{
next = node->next;
hash_val = (* hash_table->hash_func) (node->key) % new_size;
node->next = new_nodes[hash_val];
new_nodes[hash_val] = node;
}
#if HAVE_BOEHM_GC
#else
g_free (hash_table->nodes);
#endif
hash_table->nodes = new_nodes;
hash_table->size = new_size;
}
/* LOCKING: requires that the GC lock is held */
static void
rehash_fin_table (FinalizeEntryHashTable *hash_table)
{
FinalizeEntry **finalizable_hash = hash_table->table;
mword finalizable_hash_size = hash_table->size;
int i;
unsigned int hash;
FinalizeEntry **new_hash;
FinalizeEntry *entry, *next;
int new_size = g_spaced_primes_closest (hash_table->num_registered);
new_hash = mono_sgen_alloc_internal_dynamic (new_size * sizeof (FinalizeEntry*), INTERNAL_MEM_FIN_TABLE);
for (i = 0; i < finalizable_hash_size; ++i) {
for (entry = finalizable_hash [i]; entry; entry = next) {
hash = mono_object_hash (entry->object) % new_size;
next = entry->next;
entry->next = new_hash [hash];
new_hash [hash] = entry;
}
}
mono_sgen_free_internal_dynamic (finalizable_hash, finalizable_hash_size * sizeof (FinalizeEntry*), INTERNAL_MEM_FIN_TABLE);
hash_table->table = new_hash;
hash_table->size = new_size;
}
static VALUE
rg_s_spaced_primes_closest(G_GNUC_UNUSED VALUE self, VALUE num)
{
return UINT2NUM(g_spaced_primes_closest(NUM2UINT(num)));
}
