.\" .\" 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 March 29, 2012 .Dt CK_HT_ENTRY_EMPTY 3 .Sh NAME .Nm ck_ht_entry_empty .Nd determine whether entry contains a key-value pair .Sh LIBRARY Concurrency Kit (libck, \-lck) .Sh SYNOPSIS .In ck_ht.h .Ft bool .Fn ck_ht_entry_empty "ck_ht_entry_t *entry" .Sh DESCRIPTION The .Fn ck_ht_entry_empty function will return .Dv false if .Fa entry points to a valid key-value pair. If .Fa entry does not point to a valid key-value pair it returns .Dv true. It is expected that the object pointed to by .Fa entry was initialized by a preceding call to the .Xr ck_ht_entry_set family of functions, the .Xr ck_ht_get_spmc 3 function or the .Xr ck_ht_set_spmc 3 function. .Sh ERRORS Behavior is undefined if .Fa entry has not been initialized. .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_gc 3 , .Xr ck_ht_get_spmc 3 , .Xr ck_ht_grow_spmc 3 , .Xr ck_ht_remove_spmc 3 , .Xr ck_ht_count 3 , .Xr ck_ht_reset_spmc 3 , .Xr ck_ht_reset_size_spmc 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/