1 | #include "owl.h" |
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2 | |
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3 | static const char fileIdent[] = "$Id: select.c 894 2008-01-17 07:13:44Z asedeno $"; |
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4 | |
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5 | int _owl_select_timer_cmp(owl_timer *t1, owl_timer *t2) { |
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6 | return t1->time - t2->time; |
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7 | } |
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8 | |
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9 | int _owl_select_timer_eq(owl_timer *t1, owl_timer *t2) { |
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10 | return t1 == t2; |
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11 | } |
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12 | |
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13 | owl_timer *owl_select_add_timer(int after, int interval, void (*cb)(owl_timer *, void *), void (*destroy)(owl_timer*), void *data) |
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14 | { |
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15 | owl_timer *t = owl_malloc(sizeof(owl_timer)); |
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16 | GList **timers = owl_global_get_timerlist(&g); |
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17 | |
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18 | t->time = time(NULL) + after; |
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19 | t->interval = interval; |
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20 | t->callback = cb; |
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21 | t->destroy = destroy; |
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22 | t->data = data; |
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23 | |
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24 | *timers = g_list_insert_sorted(*timers, t, |
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25 | (GCompareFunc)_owl_select_timer_cmp); |
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26 | return t; |
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27 | } |
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28 | |
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29 | void owl_select_remove_timer(owl_timer *t) |
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30 | { |
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31 | GList **timers = owl_global_get_timerlist(&g); |
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32 | if (t && g_list_find(*timers, t)) { |
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33 | *timers = g_list_remove(*timers, t); |
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34 | if(t->destroy) { |
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35 | t->destroy(t); |
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36 | } |
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37 | owl_free(t); |
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38 | } |
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39 | } |
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40 | |
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41 | void owl_select_process_timers(struct timeval *timeout) |
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42 | { |
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43 | time_t now = time(NULL); |
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44 | GList **timers = owl_global_get_timerlist(&g); |
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45 | |
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46 | while(*timers) { |
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47 | owl_timer *t = (*timers)->data; |
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48 | int remove = 0; |
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49 | |
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50 | if(t->time > now) |
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51 | break; |
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52 | |
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53 | /* Reschedule if appropriate */ |
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54 | if(t->interval > 0) { |
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55 | t->time = now + t->interval; |
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56 | *timers = g_list_remove(*timers, t); |
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57 | *timers = g_list_insert_sorted(*timers, t, |
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58 | (GCompareFunc)_owl_select_timer_cmp); |
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59 | } else { |
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60 | remove = 1; |
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61 | } |
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62 | |
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63 | /* Do the callback */ |
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64 | t->callback(t, t->data); |
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65 | if(remove) { |
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66 | owl_select_remove_timer(t); |
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67 | } |
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68 | } |
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69 | |
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70 | if(*timers) { |
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71 | owl_timer *t = (*timers)->data; |
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72 | timeout->tv_sec = t->time - now; |
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73 | if (timeout->tv_sec > 60) |
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74 | timeout->tv_sec = 60; |
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75 | } else { |
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76 | timeout->tv_sec = 60; |
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77 | } |
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78 | |
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79 | timeout->tv_usec = 0; |
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80 | } |
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81 | |
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82 | /* Returns the index of the dispatch for the file descriptor. */ |
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83 | int owl_select_find_dispatch(int fd) |
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84 | { |
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85 | int i, len; |
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86 | owl_list *dl; |
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87 | owl_dispatch *d; |
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88 | |
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89 | dl = owl_global_get_dispatchlist(&g); |
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90 | len = owl_list_get_size(dl); |
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91 | for(i = 0; i < len; i++) { |
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92 | d = (owl_dispatch*)owl_list_get_element(dl, i); |
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93 | if (d->fd == fd) return i; |
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94 | } |
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95 | return -1; |
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96 | } |
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97 | |
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98 | /* Adds a new owl_dispatch to the list, replacing existing ones if needed. */ |
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99 | void owl_select_add_dispatch(owl_dispatch *d) |
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100 | { |
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101 | int elt; |
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102 | owl_list *dl; |
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103 | |
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104 | elt = owl_select_find_dispatch(d->fd); |
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105 | dl = owl_global_get_dispatchlist(&g); |
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106 | |
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107 | if (elt != -1) { /* If we have a dispatch for this FD */ |
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108 | owl_dispatch *d_old; |
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109 | d_old = (owl_dispatch*)owl_list_get_element(dl, elt); |
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110 | /* Ignore if we're adding the same dispatch again. Otherwise |
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111 | replace the old dispatch. */ |
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112 | if (d_old != d) { |
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113 | owl_list_replace_element(dl, elt, d); |
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114 | owl_free(d_old); |
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115 | } |
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116 | } |
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117 | else { |
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118 | owl_list_append_element(dl, d); |
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119 | } |
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120 | } |
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121 | |
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122 | /* Removes an owl_dispatch to the list, based on it's file descriptor. */ |
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123 | void owl_select_remove_dispatch(int fd) |
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124 | { |
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125 | int elt; |
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126 | owl_list *dl; |
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127 | |
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128 | elt = owl_select_find_dispatch(fd); |
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129 | dl = owl_global_get_dispatchlist(&g); |
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130 | |
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131 | if (elt != -1) { |
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132 | owl_dispatch *d; |
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133 | d = (owl_dispatch*)owl_list_get_element(dl, elt); |
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134 | owl_list_remove_element(dl, elt); |
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135 | if (d->pfunc) { |
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136 | owl_perlconfig_dispatch_free(d); |
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137 | } |
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138 | owl_free(d); |
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139 | } |
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140 | } |
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141 | |
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142 | int owl_select_dispatch_count() |
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143 | { |
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144 | return owl_list_get_size(owl_global_get_dispatchlist(&g)); |
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145 | } |
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146 | |
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147 | int owl_select_add_perl_dispatch(int fd, SV *cb) |
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148 | { |
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149 | int elt; |
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150 | owl_dispatch *d; |
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151 | elt = owl_select_find_dispatch(fd); |
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152 | if (elt != -1) { |
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153 | d = (owl_dispatch*)owl_list_get_element(owl_global_get_dispatchlist(&g), elt); |
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154 | if (d->pfunc == NULL) { |
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155 | /* don't mess with non-perl dispatch functions from here. */ |
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156 | return 1; |
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157 | } |
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158 | } |
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159 | |
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160 | d = malloc(sizeof(owl_dispatch)); |
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161 | d->fd = fd; |
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162 | d->cfunc = NULL; |
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163 | d->pfunc = cb; |
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164 | owl_select_add_dispatch(d); |
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165 | return 0; |
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166 | } |
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167 | |
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168 | int owl_select_remove_perl_dispatch(int fd) |
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169 | { |
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170 | int elt; |
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171 | owl_dispatch *d; |
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172 | |
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173 | elt = owl_select_find_dispatch(fd); |
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174 | if (elt != -1) { |
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175 | d = (owl_dispatch*)owl_list_get_element(owl_global_get_dispatchlist(&g), elt); |
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176 | if (d->pfunc != NULL) { |
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177 | owl_select_remove_dispatch(fd); |
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178 | return 0; |
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179 | } |
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180 | } |
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181 | return 1; |
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182 | } |
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183 | |
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184 | int owl_select_dispatch_prepare_fd_sets(fd_set *r, fd_set *e) |
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185 | { |
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186 | int i, len, max_fd; |
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187 | owl_dispatch *d; |
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188 | owl_list *dl; |
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189 | |
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190 | dl = owl_global_get_dispatchlist(&g); |
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191 | FD_ZERO(r); |
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192 | FD_ZERO(e); |
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193 | max_fd = 0; |
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194 | len = owl_select_dispatch_count(g); |
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195 | for(i = 0; i < len; i++) { |
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196 | d = (owl_dispatch*)owl_list_get_element(dl, i); |
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197 | FD_SET(d->fd, r); |
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198 | FD_SET(d->fd, e); |
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199 | if (max_fd < d->fd) max_fd = d->fd; |
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200 | } |
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201 | return max_fd + 1; |
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202 | } |
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203 | |
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204 | void owl_select_dispatch(fd_set *fds, int max_fd) |
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205 | { |
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206 | int i, len; |
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207 | owl_dispatch *d; |
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208 | owl_list *dl; |
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209 | |
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210 | dl = owl_global_get_dispatchlist(&g); |
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211 | len = owl_select_dispatch_count(); |
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212 | for(i = 0; i < len; i++) { |
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213 | d = (owl_dispatch*)owl_list_get_element(dl, i); |
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214 | /* While d shouldn't normally be null, the list may be altered by |
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215 | * functions we dispatch to. */ |
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216 | if (d != NULL && FD_ISSET(d->fd, fds)) { |
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217 | if (d->cfunc != NULL) { |
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218 | (d->cfunc)(); |
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219 | } |
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220 | else if (d->pfunc != NULL) { |
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221 | owl_perlconfig_do_dispatch(d); |
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222 | } |
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223 | } |
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224 | } |
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225 | } |
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226 | |
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227 | int owl_select_aim_hack(fd_set *rfds, fd_set *wfds) |
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228 | { |
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229 | aim_conn_t *cur; |
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230 | aim_session_t *sess; |
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231 | int max_fd; |
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232 | |
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233 | FD_ZERO(rfds); |
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234 | FD_ZERO(wfds); |
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235 | max_fd = 0; |
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236 | sess = owl_global_get_aimsess(&g); |
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237 | for (cur = sess->connlist, max_fd = 0; cur; cur = cur->next) { |
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238 | if (cur->fd != -1) { |
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239 | FD_SET(cur->fd, rfds); |
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240 | if (cur->status & AIM_CONN_STATUS_INPROGRESS) { |
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241 | /* Yes, we're checking writable sockets here. Without it, AIM |
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242 | login is really slow. */ |
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243 | FD_SET(cur->fd, wfds); |
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244 | } |
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245 | |
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246 | if (cur->fd > max_fd) |
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247 | max_fd = cur->fd; |
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248 | } |
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249 | } |
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250 | return max_fd; |
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251 | } |
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252 | |
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253 | void owl_select() |
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254 | { |
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255 | int i, max_fd, aim_max_fd, aim_done; |
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256 | fd_set r; |
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257 | fd_set e; |
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258 | fd_set aim_rfds, aim_wfds; |
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259 | struct timeval timeout; |
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260 | |
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261 | owl_select_process_timers(&timeout); |
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262 | |
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263 | max_fd = owl_select_dispatch_prepare_fd_sets(&r, &e); |
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264 | |
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265 | /* AIM HACK: |
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266 | * |
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267 | * The problem - I'm not sure where to hook into the owl/faim |
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268 | * interface to keep track of when the AIM socket(s) open and |
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269 | * close. In particular, the bosconn thing throws me off. So, |
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270 | * rather than register particular dispatchers for AIM, I look up |
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271 | * the relevant FDs and add them to select's watch lists, then |
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272 | * check for them individually before moving on to the other |
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273 | * dispatchers. --asedeno |
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274 | */ |
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275 | aim_done = 1; |
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276 | FD_ZERO(&aim_rfds); |
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277 | FD_ZERO(&aim_wfds); |
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278 | if (owl_global_is_doaimevents(&g)) { |
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279 | aim_done = 0; |
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280 | aim_max_fd = owl_select_aim_hack(&aim_rfds, &aim_wfds); |
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281 | if (max_fd < aim_max_fd) max_fd = aim_max_fd; |
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282 | for(i = 0; i <= aim_max_fd; i++) { |
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283 | if (FD_ISSET(i, &aim_rfds)) { |
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284 | FD_SET(i, &r); |
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285 | FD_SET(i, &e); |
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286 | } |
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287 | } |
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288 | } |
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289 | /* END AIM HACK */ |
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290 | |
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291 | if ( select(max_fd+1, &r, &aim_wfds, &e, &timeout) ) { |
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292 | /* Merge fd_sets and clear AIM FDs. */ |
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293 | for(i = 0; i <= max_fd; i++) { |
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294 | /* Merge all interesting FDs into one set, since we have a |
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295 | single dispatch per FD. */ |
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296 | if (FD_ISSET(i, &r) || FD_ISSET(i, &aim_wfds) || FD_ISSET(i, &e)) { |
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297 | /* AIM HACK: no separate dispatch, just process here if |
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298 | needed, and only once per run through. */ |
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299 | if (!aim_done && (FD_ISSET(i, &aim_rfds) || FD_ISSET(i, &aim_wfds))) { |
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300 | owl_process_aim(); |
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301 | aim_done = 1; |
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302 | } |
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303 | else { |
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304 | FD_SET(i, &r); |
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305 | } |
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306 | } |
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307 | } |
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308 | /* NOTE: the same dispatch function is called for both exceptional |
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309 | and read ready FDs. */ |
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310 | owl_select_dispatch(&r, max_fd); |
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311 | } |
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312 | } |
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