ck_ht_gc man page on DragonFly
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CK_HT_GC(3) BSD Library Functions Manual CK_HT_GC(3)
NAME
ck_ht_gc — perform maintenance on a hash table
LIBRARY
Concurrency Kit (libck, -lck)
SYNOPSIS
#include <ck_ht.h>
bool
ck_ht_gc(ck_ht_t *ht, unsigned long cycles, unsigned long seed);
DESCRIPTION
The ck_ht_gc() function will perform various maintenance routines on the
hash table pointed to by ht, including defragmentation of probe sequences
with respect to tombstones and in the case that the delete workload hint
has been passed, recalculation of probe sequence bounds. The cycles argu‐
ment is used to indicate how many hash table entries should be subject to
attempted maintenance. If cycles is 0, then maintenance is performed on
the complete hash table. The seed argument determines the start location
of the maintenance process. If cycles is non-zero, it is recommended that
seed is some random value. If the delete hint has been passed, the func‐
tion will require an additional 12% of memory (with respect to existing
memory usage of the set), until operation completion.
RETURN VALUES
Upon successful completion, ck_ht_gc(3) returns true and otherwise
returns false on failure due to memory allocation failure.
ERRORS
This function will only return false if there are internal memory alloca‐
tion failures.
SEE ALSO
ck_ht_count(3), ck_ht_stat(3), ck_ht_init(3), ck_ht_destroy(3),
ck_ht_hash(3), ck_ht_hash_direct(3), ck_ht_set_spmc(3),
ck_ht_put_spmc(3), ck_ht_get_spmc(3), ck_ht_grow_spmc(3),
ck_ht_remove_spmc(3), ck_ht_reset_size_spmc(3), ck_ht_reset_spmc(3),
ck_ht_entry_empty(3), ck_ht_entry_key_set(3),
ck_ht_entry_key_set_direct(3), ck_ht_entry_key(3),
ck_ht_entry_key_length(3), ck_ht_entry_value(3), ck_ht_entry_set(3),
ck_ht_entry_set_direct(3), ck_ht_entry_key_direct(3),
ck_ht_entry_value_direct(3), ck_ht_iterator_init(3), ck_ht_next(3)
Additional information available at http://concurrencykit.org/
December 18, 2013
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