mirror of
https://github.com/moparisthebest/spdylay
synced 2024-11-17 23:15:07 -05:00
100 lines
2.8 KiB
C
100 lines
2.8 KiB
C
/*
|
|
* Spdylay - SPDY Library
|
|
*
|
|
* Copyright (c) 2012 Tatsuhiro Tsujikawa
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining
|
|
* a copy of this software and associated documentation files (the
|
|
* "Software"), to deal in the Software without restriction, including
|
|
* without limitation the rights to use, copy, modify, merge, publish,
|
|
* distribute, sublicense, and/or sell copies of the Software, and to
|
|
* permit persons to whom the Software is furnished to do so, subject to
|
|
* the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be
|
|
* included in all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
|
|
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
|
|
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
|
|
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
*/
|
|
#ifndef SPDYLAY_PQ_H
|
|
#define SPDYLAY_PQ_H
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include <config.h>
|
|
#endif /* HAVE_CONFIG_H */
|
|
|
|
#include <spdylay/spdylay.h>
|
|
#include "spdylay_int.h"
|
|
|
|
/* Implementation of priority queue */
|
|
|
|
typedef struct {
|
|
/* The pointer to the pointer to the item stored */
|
|
void **q;
|
|
/* The number of items sotred */
|
|
size_t length;
|
|
/* The maximum number of items this pq can store. This is
|
|
automatically extended when length is reached to this value. */
|
|
size_t capacity;
|
|
/* The compare function between items */
|
|
spdylay_compar compar;
|
|
} spdylay_pq;
|
|
|
|
/*
|
|
* Initializes priority queue |pq| with compare function |cmp|.
|
|
*
|
|
* This function returns 0 if it succeeds, or one of the following
|
|
* negative error codes:
|
|
*
|
|
* SPDYLAY_ERR_NOMEM
|
|
* Out of memory.
|
|
*/
|
|
int spdylay_pq_init(spdylay_pq *pq, spdylay_compar cmp);
|
|
|
|
/*
|
|
* Deallocates any resources allocated for |pq|. The stored items are
|
|
* not freed by this function.
|
|
*/
|
|
void spdylay_pq_free(spdylay_pq *pq);
|
|
|
|
/*
|
|
* Adds |item| to the priority queue |pq|.
|
|
*
|
|
* This function returns 0 if it succeds, or one of the following
|
|
* negative error codes:
|
|
*
|
|
* SPDYLAY_ERR_NOMEM
|
|
* Out of memory.
|
|
*/
|
|
int spdylay_pq_push(spdylay_pq *pq, void *item);
|
|
|
|
/*
|
|
* Returns item at the top of the queue |pq|. If the queue is empty,
|
|
* this function returns NULL.
|
|
*/
|
|
void* spdylay_pq_top(spdylay_pq *pq);
|
|
|
|
/*
|
|
* Pops item at the top of the queue |pq|. The popped item is not
|
|
* freed by this function.
|
|
*/
|
|
void spdylay_pq_pop(spdylay_pq *pq);
|
|
|
|
/*
|
|
* Returns nonzero if the queue |pq| is empty.
|
|
*/
|
|
int spdylay_pq_empty(spdylay_pq *pq);
|
|
|
|
/*
|
|
* Returns the number of items in the queue |pq|.
|
|
*/
|
|
size_t spdylay_pq_size(spdylay_pq *pq);
|
|
|
|
#endif /* SPDYLAY_PQ_H */
|