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/* This file is part of the YAZ toolkit.
* Copyright (C) 1995-2008 Index Data
* See the file LICENSE for details.
*/
/**
* \file requestq.c
* \brief Implements Simple queue management for GFS.
*
* We also use the request-freelist to store encoding buffers, rather than
* freeing and xmalloc'ing them on each cycle.
*/
#include <stdlib.h>
#include <yaz/xmalloc.h>
#include "session.h"
void request_enq(request_q *q, request *r)
{
if (q->tail)
q->tail->next = r;
else
q->head = r;
q->tail = r;
q->num++;
}
request *request_head(request_q *q)
{
return q->head;
}
request *request_deq(request_q *q)
{
request *r = q->head;
if (!r)
return 0;
q->head = q->head->next;
if (!q->head)
q->tail = 0;
q->num--;
return r;
}
void request_initq(request_q *q)
{
q->head = q->tail = q->list = 0;
q->num = 0;
}
void request_delq(request_q *q)
{
request *r1, *r = q->list;
while (r)
{
xfree (r->response);
r1 = r;
r = r->next;
xfree (r1);
}
}
request *request_get(request_q *q)
{
request *r = q->list;
if (r)
q->list = r->next;
else
{
if (!(r = (request *)xmalloc(sizeof(*r))))
abort();
r->response = 0;
r->size_response = 0;
}
r->q = q;
r->len_refid = 0;
r->refid = 0;
r->gdu_request = 0;
r->apdu_request = 0;
r->request_mem = 0;
r->len_response = 0;
r->clientData = 0;
r->state = REQUEST_IDLE;
r->next = 0;
return r;
}
void request_release(request *r)
{
request_q *q = r->q;
r->next = q->list;
q->list = r;
}
/*
* Local variables:
* c-basic-offset: 4
* indent-tabs-mode: nil
* End:
* vim: shiftwidth=4 tabstop=8 expandtab
*/
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