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/* vim:ts=8:sts=8:sw=4:noai:noexpandtab
*
* portable double-ended queue.
*
* Copyright (c) 2010 Miru Limited.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#if !defined (__PGM_IMPL_FRAMEWORK_H_INSIDE__) && !defined (PGM_COMPILATION)
# error "Only <framework.h> can be included directly."
#endif
#ifndef __PGM_IMPL_QUEUE_H__
#define __PGM_IMPL_QUEUE_H__
typedef struct pgm_queue_t pgm_queue_t;
#include <pgm/types.h>
#include <pgm/list.h>
PGM_BEGIN_DECLS
struct pgm_queue_t
{
pgm_list_t* head; /* head & tail equal on 1 element */
pgm_list_t* tail;
unsigned length;
};
PGM_GNUC_INTERNAL bool pgm_queue_is_empty (const pgm_queue_t*const) PGM_GNUC_WARN_UNUSED_RESULT;
PGM_GNUC_INTERNAL void pgm_queue_push_head_link (pgm_queue_t*restrict, pgm_list_t*restrict);
PGM_GNUC_INTERNAL pgm_list_t* pgm_queue_pop_tail_link (pgm_queue_t*);
PGM_GNUC_INTERNAL pgm_list_t* pgm_queue_peek_tail_link (pgm_queue_t*) PGM_GNUC_WARN_UNUSED_RESULT;
PGM_GNUC_INTERNAL void pgm_queue_unlink (pgm_queue_t*restrict, pgm_list_t*restrict);
PGM_END_DECLS
#endif /* __PGM_IMPL_QUEUE_H__ */
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