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annotate queue.c @ 447:278805938dcf

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Patch from Nicolai Ehemann to try binding before going to the background, so that if it exits early (because something's already listening etc) then it will return an exitcode of 1.
author Matt Johnston <matt@ucc.asn.au>
date Thu, 19 Jul 2007 15:54:18 +0000
parents c5d3ef11155f
children 9a5438271556
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * Dropbear - a SSH2 server
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3 *
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4 * Copyright (c) 2002,2003 Matt Johnston
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5 * All rights reserved.
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6 *
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7 * Permission is hereby granted, free of charge, to any person obtaining a copy
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8 * of this software and associated documentation files (the "Software"), to deal
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9 * in the Software without restriction, including without limitation the rights
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10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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11 * copies of the Software, and to permit persons to whom the Software is
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12 * furnished to do so, subject to the following conditions:
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13 *
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14 * The above copyright notice and this permission notice shall be included in
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15 * all copies or substantial portions of the Software.
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16 *
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17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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23 * SOFTWARE. */
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24
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25 #include "includes.h"
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26 #include "dbutil.h"
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27 #include "queue.h"
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28
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29 void initqueue(struct Queue* queue) {
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30
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31 queue->head = NULL;
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32 queue->tail = NULL;
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33 queue->count = 0;
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34 }
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35
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36 int isempty(struct Queue* queue) {
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38 return (queue->head == NULL);
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39 }
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40
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41 void* dequeue(struct Queue* queue) {
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42
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43 void* ret;
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44 struct Link* oldhead;
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45 dropbear_assert(!isempty(queue));
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47 ret = queue->head->item;
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48 oldhead = queue->head;
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50 if (oldhead->link != NULL) {
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51 queue->head = oldhead->link;
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52 } else {
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53 queue->head = NULL;
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54 queue->tail = NULL;
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55 TRACE(("empty queue dequeing"))
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56 }
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57
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58 m_free(oldhead);
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59 queue->count--;
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60 return ret;
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61 }
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63 void *examine(struct Queue* queue) {
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64
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65 dropbear_assert(!isempty(queue));
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66 return queue->head->item;
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67 }
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68
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69 void enqueue(struct Queue* queue, void* item) {
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71 struct Link* newlink;
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72
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73 TRACE(("enter enqueue"))
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74 newlink = (struct Link*)m_malloc(sizeof(struct Link));
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76 newlink->item = item;
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77 newlink->link = NULL;
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79 if (queue->tail != NULL) {
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80 queue->tail->link = newlink;
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81 }
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82 queue->tail = newlink;
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84 if (queue->head == NULL) {
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85 queue->head = newlink;
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86 }
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87 queue->count++;
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88 TRACE(("leave enqueue"))
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89 }