doc: Add ck_ht_gc manual page.

doc/Makefile.in

@@ -21,6 +21,7 @@ OBJECTS=CK_ARRAY_FOREACH		\
 	ck_brlock			\
 	ck_ht_count 	  		\
 	ck_ht_destroy	  		\
+	ck_ht_gc			\
 	ck_ht_get_spmc	  		\
 	ck_ht_grow_spmc	  		\
 	ck_ht_hash	  		\

doc/ck_ht_gc

@@ -0,0 +1,95 @@
+.\"
+.\" Copyright 2012-2013 Samy Al Bahra.
+.\" All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"
+.Dd December 18, 2013
+.Dt CK_HT_GC 3
+.Sh NAME
+.Nm ck_ht_gc
+.Nd perform maintenance on a hash table
+.Sh LIBRARY
+Concurrency Kit (libck, \-lck)
+.Sh SYNOPSIS
+.In ck_ht.h
+.Ft bool
+.Fn ck_ht_gc "ck_ht_t *ht" "unsigned long cycles" "unsigned long seed"
+.Sh DESCRIPTION
+The
+.Fn ck_ht_gc
+function will perform various maintenance routines on the hash table
+pointed to by
+.Fa 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
+.Fa cycles
+argument is used to indicate how many hash table entries should be subject
+to attempted maintenance.
+If
+.Fa cycles
+is 0, then maintenance is performed on the complete hash table. The
+.Fa seed
+argument determines the start location of the maintenance process. If
+.Fa cycles
+is non-zero, it is recommended that
+.Fa seed
+is some random value. If the delete hint has been passed, the function
+will require an additional 12% of memory (with respect to existing
+memory usage of the set), until operation completion.
+.Sh RETURN VALUES
+Upon successful completion,
+.Fn ck_ht_gc 3
+returns true and otherwise returns false on failure due to memory allocation
+failure.
+.Sh ERRORS
+This function will only return false if there are internal memory allocation
+failures.
+.Sh SEE ALSO
+.Xr ck_ht_stat 3 ,
+.Xr ck_ht_init 3 ,
+.Xr ck_ht_destroy 3 ,
+.Xr ck_ht_hash 3 ,
+.Xr ck_ht_hash_direct 3 ,
+.Xr ck_ht_set_spmc 3 ,
+.Xr ck_ht_put_spmc 3 ,
+.Xr ck_ht_get_spmc 3 ,
+.Xr ck_ht_grow_spmc 3 ,
+.Xr ck_ht_remove_spmc 3 ,
+.Xr ck_ht_reset_size_spmc 3 ,
+.Xr ck_ht_reset_spmc 3 ,
+.Xr ck_ht_entry_empty 3 ,
+.Xr ck_ht_entry_key_set 3 ,
+.Xr ck_ht_entry_key_set_direct 3 ,
+.Xr ck_ht_entry_key 3 ,
+.Xr ck_ht_entry_key_length 3 ,
+.Xr ck_ht_entry_value 3 ,
+.Xr ck_ht_entry_set 3 ,
+.Xr ck_ht_entry_set_direct 3 ,
+.Xr ck_ht_entry_key_direct 3 ,
+.Xr ck_ht_entry_value_direct 3 ,
+.Xr ck_ht_iterator_init 3 ,
+.Xr ck_ht_next 3
+.Pp
+Additional information available at http://concurrencykit.org/