diff options
author | Matt Johnston <matt@ucc.asn.au> | 2004-06-01 02:46:09 +0000 |
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committer | Matt Johnston <matt@ucc.asn.au> | 2004-06-01 02:46:09 +0000 |
commit | 674a60748884dc55ee7091b7c23a41240e75f73c (patch) | |
tree | 3b5a173c356f867b94df3873b57ff36d33129ea7 /queue.c |
Makefile.in contains updated files required
--HG--
extra : convert_revision : cc8a8c49dc70e632c352853a39801089b08149be
Diffstat (limited to 'queue.c')
-rw-r--r-- | queue.c | 89 |
1 files changed, 89 insertions, 0 deletions
@@ -0,0 +1,89 @@ +/* + * Dropbear - a SSH2 server + * + * Copyright (c) 2002,2003 Matt Johnston + * All rights reserved. + * + * 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. */ + +#include "includes.h" +#include "dbutil.h" +#include "queue.h" + +void initqueue(struct Queue* queue) { + + queue->head = NULL; + queue->tail = NULL; + queue->count = 0; +} + +int isempty(struct Queue* queue) { + + return (queue->head == NULL); +} + +void* dequeue(struct Queue* queue) { + + void* ret; + struct Link* oldhead; + assert(!isempty(queue)); + + ret = queue->head->item; + oldhead = queue->head; + + if (oldhead->link != NULL) { + queue->head = oldhead->link; + } else { + queue->head = NULL; + queue->tail = NULL; + TRACE(("empty queue dequeing")); + } + + m_free(oldhead); + queue->count--; + return ret; +} + +void *examine(struct Queue* queue) { + + assert(!isempty(queue)); + return queue->head->item; +} + +void enqueue(struct Queue* queue, void* item) { + + struct Link* newlink; + + TRACE(("enter enqueue")); + newlink = (struct Link*)m_malloc(sizeof(struct Link)); + + newlink->item = item; + newlink->link = NULL; + + if (queue->tail != NULL) { + queue->tail->link = newlink; + } + queue->tail = newlink; + + if (queue->head == NULL) { + queue->head = newlink; + } + queue->count++; + TRACE(("leave enqueue")); +} |