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Adding upstream version 0.6.0.

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Signed-off-by: Daniel Baumann <daniel@debian.org>
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.\"
.\" Copyright 2012-2013 Samy Al Bahra.
.\" All rights reserved.
.\"
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.\" modification, are permitted provided that the following conditions
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\"
.Dd September 2, 2012
.Dt CK_EPOCH_RECYCLE 3
.Sh NAME
.Nm ck_epoch_recycle
.Nd return an epoch record that may be used by caller
.Sh LIBRARY
Concurrency Kit (libck, \-lck)
.Sh SYNOPSIS
.In ck_epoch.h
.Ft ck_epoch_record_t *
.Fn ck_epoch_recycle "ck_epoch_t *epoch"
.Sh DESCRIPTION
The
.Fn 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
.Fn ck_epoch_unregister 3
function.
.Sh EXAMPLE
.Bd -literal -offset indent
#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;
}
.Ed
.Sh RETURN VALUES
This function returns a pointer to a
.Dv ck_epoch_record_t
object. If no unused record was found to be associated with the
object pointed to by
.Fa epoch ,
then the function will return NULL.
.Sh ERRORS
Behavior is undefined if the object pointed to by
.Fa epoch
is not a valid epoch object.
.Sh SEE ALSO
.Xr ck_epoch_init 3 ,
.Xr ck_epoch_register 3 ,
.Xr ck_epoch_unregister 3 ,
.Xr ck_epoch_poll 3 ,
.Xr ck_epoch_synchronize 3 ,
.Xr ck_epoch_reclaim 3 ,
.Xr ck_epoch_barrier 3 ,
.Xr ck_epoch_call 3 ,
.Xr ck_epoch_begin 3 ,
.Xr ck_epoch_end 3
.Pp
Additional information available at http://concurrencykit.org/