CK_EPOCH_RECYCLE(3) BSD Library Functions Manual CK_EPOCH_RECYCLE(3)NAMEck_epoch_recycle — return an epoch record that may be used by caller
LIBRARY
Concurrency Kit (libck, -lck)
SYNOPSIS
#include <ck_epoch.h>
ck_epoch_record_t *
ck_epoch_recycle(ck_epoch_t *epoch);
DESCRIPTION
The ck_epoch_recycle(3) function attempts to return an unused epoch
record object for use by the caller. These epoch records were associated
with previous calls to the ck_epoch_unregister(3) function.
EXAMPLE
#include <ck_epoch.h>
#include <stdlib.h>
/*
* epoch was previously initialized with ck_epoch_init.
*/
ck_epoch_t *epoch;
void
function(void)
{
ck_epoch_record_t *record;
record = ck_epoch_recycle(&epoch);
if (record == NULL) {
record = malloc(sizeof *record);
if (record == NULL)
return;
ck_epoch_register(&epoch, record);
}
/*
* After we are done, we will unregister the record so it
* can be used by other new participants in the epoch system
* provided by the object pointed to by "epoch".
*/
ck_epoch_unregister(&epoch, record);
return;
}
RETURN VALUES
This function returns a pointer to a ck_epoch_record_t object. If no
unused record was found to be associated with the object pointed to by
epoch, then the function will return NULL.
ERRORS
Behavior is undefined if the object pointed to by epoch is not a valid
epoch object.
SEE ALSOck_epoch_init(3), ck_epoch_register(3), ck_epoch_unregister(3),
ck_epoch_poll(3), ck_epoch_synchronize(3), ck_epoch_reclaim(3),
ck_epoch_barrier(3), ck_epoch_call(3), ck_epoch_begin(3), ck_epoch_end(3)
Additional information available at http://concurrencykit.org/
September 2, 2012
