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annotate arogue5/daemon.c @ 114:a5433ba4cabf

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arogue5: fix some daemon-related pointer/int casting. Daemons and fuses take a single argument, nominally an int but either ignored or unsafely cast to a pointer. Its type has now been changed to void*. The save/restore code no longer tries to store this argument in the savefile. For doctor(), this is not a problem, because player is the only argument it is ever given as a daemon. However, alchemy() will fail to do anything when passed NULL. Fixing this would be complicated but possible. Summary: the code is slightly safer, but alchemy jugs are guaranteed to stop working after save and restore, instead of just extremely likely.
author John "Elwin" Edwards
date Fri, 28 Mar 2014 10:57:03 -0700
parents f2951c4e28d9
children 56e748983fa8
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * Contains functions for dealing with things that happen in the future.
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3 *
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4 * Advanced Rogue
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5 * Copyright (C) 1984, 1985 Michael Morgan, Ken Dalka and AT&T
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6 * All rights reserved.
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7 *
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8 * Based on "Rogue: Exploring the Dungeons of Doom"
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9 * Copyright (C) 1980, 1981 Michael Toy, Ken Arnold and Glenn Wichman
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10 * All rights reserved.
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11 *
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12 * See the file LICENSE.TXT for full copyright and licensing information.
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13 */
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14
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15 #include "curses.h"
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16 #include "rogue.h"
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17
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18 #define EMPTY 0
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19 #define DAEMON -1
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20
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21 #define _X_ { EMPTY }
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22
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23 struct delayed_action d_list[MAXDAEMONS] = {
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24 _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_
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25 };
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26 struct delayed_action f_list[MAXFUSES] = {
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27 _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_,
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28 _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_, _X_
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29 };
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30 int demoncnt = 0; /* number of active daemons */
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31 int fusecnt = 0;
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32
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33
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34 /*
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35 * d_slot:
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36 * Find an empty slot in the daemon list
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37 */
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38 struct delayed_action *
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39 d_slot()
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40 {
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41 reg int i;
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42 reg struct delayed_action *dev;
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43
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44 for (i = 0, dev = d_list; i < MAXDAEMONS; i++, dev++)
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45 if (dev->d_type == EMPTY)
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46 return dev;
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47 return NULL;
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48 }
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49
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50 /*
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51 * f_slot:
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52 * Find an empty slot in the fuses list
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53 */
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54 struct delayed_action *
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55 f_slot()
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56 {
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57 reg int i;
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58 reg struct delayed_action *dev;
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59
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60 for (i = 0, dev = f_list; i < MAXFUSES; i++, dev++)
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61 if (dev->d_type == EMPTY)
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62 return dev;
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63 return NULL;
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64 }
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65
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66
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67
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68 /*
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69 * find_slot:
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70 * Find a particular slot in the table
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71 */
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72 struct delayed_action *
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73 find_slot(func)
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74 reg int (*func)();
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75 {
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76 reg int i;
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77 reg struct delayed_action *dev;
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78
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79 for (i = 0, dev = f_list; i < MAXFUSES; i++, dev++)
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80 if (dev->d_type != EMPTY && func == dev->d_func)
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81 return dev;
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82 return NULL;
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83 }
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84
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85
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86 /*
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87 * start_daemon:
63
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88 * Start a daemon, takes a function.
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89 */
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90 start_daemon(int (*func)(), void *arg, int type)
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91 {
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92 reg struct delayed_action *dev;
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93
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94 dev = d_slot();
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95 if (dev != NULL) {
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96 dev->d_type = type;
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97 dev->d_func = func;
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98 dev->d_arg = arg;
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99 dev->d_time = DAEMON;
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100 demoncnt += 1; /* update count */
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101 }
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102 }
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103
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104
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105 /*
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106 * kill_daemon:
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107 * Remove a daemon from the list
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108 */
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109 kill_daemon(func)
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110 reg int (*func)();
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111 {
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112 reg struct delayed_action *dev;
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113 reg int i;
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114
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115 for (i = 0, dev = d_list; i < MAXDAEMONS; i++, dev++) {
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116 if (dev->d_type != EMPTY && func == dev->d_func)
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117 break;
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118 }
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119 if (i >= MAXDAEMONS) return; /* if not found, forget it */
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120 /*
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121 * Take it out of the list
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122 */
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123 dev->d_type = EMPTY;
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124 dev->d_arg = NULL;
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125 dev->d_func = NULL;
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126 dev->d_time = 0;
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127 demoncnt -= 1; /* update count */
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128 }
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129
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130
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131 /*
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132 * do_daemons:
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133 * Run all the daemons that are active with the current flag,
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134 * passing the argument to the function.
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135 */
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136 do_daemons(flag)
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137 reg int flag;
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138 {
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139 reg struct delayed_action *dev;
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140
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141 /*
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142 * Loop through the devil list
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143 */
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144 for (dev = d_list; dev <= &d_list[MAXDAEMONS-1]; dev++)
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145 /*
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146 * Executing each one, giving it the proper arguments
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147 */
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148 if (dev->d_func != NULL && dev->d_type == flag && dev->d_time == DAEMON)
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149 (*dev->d_func)(dev->d_arg);
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150 }
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151
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152
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153 /*
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154 * fuse:
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155 * Start a fuse to go off in a certain number of turns
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156 */
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157 fuse(int (*func)(), void *arg, int time, int type)
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158 {
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159 reg struct delayed_action *wire;
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160
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161 wire = f_slot();
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162 if (wire != NULL) {
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163 wire->d_type = type;
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164 wire->d_func = func;
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165 wire->d_arg = arg;
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166 wire->d_time = time;
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167 fusecnt += 1; /* update count */
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168 }
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169 }
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170
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171
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172 /*
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173 * lengthen:
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174 * Increase the time until a fuse goes off
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175 */
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176 lengthen(func, xtime)
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177 reg int (*func)(), xtime;
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178 {
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179 reg struct delayed_action *wire;
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180
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181 if ((wire = find_slot(func)) == NULL)
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182 return;
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183 wire->d_time += xtime;
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184 }
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185
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186
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187 /*
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188 * extinguish:
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189 * Put out a fuse
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190 */
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191 extinguish(func)
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192 reg int (*func)();
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193 {
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194 reg struct delayed_action *wire;
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195
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196 if ((wire = find_slot(func)) == NULL)
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197 return;
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198 wire->d_type = EMPTY;
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199 wire->d_func = NULL;
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200 wire->d_arg = NULL;
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201 wire->d_time = 0;
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202 fusecnt -= 1;
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203 }
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204
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205
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206 /*
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207 * do_fuses:
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208 * Decrement counters and start needed fuses
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209 */
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210 do_fuses(flag)
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211 reg int flag;
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212 {
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213 reg struct delayed_action *wire;
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214
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215 /*
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216 * Step though the list
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217 */
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218 for (wire = f_list; wire <= &f_list[MAXFUSES-1]; wire++) {
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219 /*
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220 * Decrementing counters and starting things we want. We also need
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221 * to remove the fuse from the list once it has gone off.
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222 */
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223 if(flag == wire->d_type && wire->d_time > 0 &&
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224 --wire->d_time == 0) {
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225 wire->d_type = EMPTY;
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226 if (wire->d_func != NULL)
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227 (*wire->d_func)(wire->d_arg);
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228 fusecnt -= 1;
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229 }
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230 }
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231 }
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232
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233 /*
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234 * activity:
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235 * Show wizard number of demaons and memory blocks used
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236 */
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237 activity()
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238 {
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239 sprintf(outstring,"Daemons = %d : Fuses = %d : Memory Items = %d : Memory Used = %d",
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240 demoncnt,fusecnt,total,md_memused());
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241 msg(outstring);
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242 }