1 | #include "owl.h" |
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2 | |
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3 | static int dispatch_active = 0; |
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4 | static int psa_active = 0; |
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5 | |
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6 | int _owl_select_timer_cmp(const owl_timer *t1, const owl_timer *t2) { |
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7 | return t1->time - t2->time; |
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8 | } |
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9 | |
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10 | int _owl_select_timer_eq(const owl_timer *t1, const owl_timer *t2) { |
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11 | return t1 == t2; |
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12 | } |
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13 | |
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14 | 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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15 | { |
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16 | owl_timer *t = owl_malloc(sizeof(owl_timer)); |
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17 | GList **timers = owl_global_get_timerlist(&g); |
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18 | |
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19 | t->time = time(NULL) + after; |
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20 | t->interval = interval; |
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21 | t->callback = cb; |
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22 | t->destroy = destroy; |
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23 | t->data = data; |
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24 | |
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25 | *timers = g_list_insert_sorted(*timers, t, |
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26 | (GCompareFunc)_owl_select_timer_cmp); |
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27 | return t; |
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28 | } |
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29 | |
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30 | void owl_select_remove_timer(owl_timer *t) |
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31 | { |
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32 | GList **timers = owl_global_get_timerlist(&g); |
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33 | if (t && g_list_find(*timers, t)) { |
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34 | *timers = g_list_remove(*timers, t); |
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35 | if(t->destroy) { |
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36 | t->destroy(t); |
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37 | } |
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38 | owl_free(t); |
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39 | } |
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40 | } |
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41 | |
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42 | void owl_select_process_timers(struct timespec *timeout) |
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43 | { |
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44 | time_t now = time(NULL); |
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45 | GList **timers = owl_global_get_timerlist(&g); |
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46 | |
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47 | while(*timers) { |
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48 | owl_timer *t = (*timers)->data; |
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49 | int remove = 0; |
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50 | |
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51 | if(t->time > now) |
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52 | break; |
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53 | |
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54 | /* Reschedule if appropriate */ |
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55 | if(t->interval > 0) { |
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56 | t->time = now + t->interval; |
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57 | *timers = g_list_remove(*timers, t); |
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58 | *timers = g_list_insert_sorted(*timers, t, |
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59 | (GCompareFunc)_owl_select_timer_cmp); |
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60 | } else { |
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61 | remove = 1; |
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62 | } |
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63 | |
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64 | /* Do the callback */ |
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65 | t->callback(t, t->data); |
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66 | if(remove) { |
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67 | owl_select_remove_timer(t); |
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68 | } |
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69 | } |
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70 | |
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71 | if(*timers) { |
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72 | owl_timer *t = (*timers)->data; |
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73 | timeout->tv_sec = t->time - now; |
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74 | if (timeout->tv_sec > 60) |
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75 | timeout->tv_sec = 60; |
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76 | } else { |
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77 | timeout->tv_sec = 60; |
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78 | } |
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79 | |
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80 | timeout->tv_nsec = 0; |
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81 | } |
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82 | |
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83 | static const owl_io_dispatch *owl_select_find_io_dispatch_by_fd(const int fd) |
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84 | { |
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85 | int i, len; |
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86 | const owl_list *dl; |
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87 | owl_io_dispatch *d; |
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88 | dl = owl_global_get_io_dispatch_list(&g); |
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89 | len = owl_list_get_size(dl); |
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90 | for(i = 0; i < len; i++) { |
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91 | d = owl_list_get_element(dl, i); |
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92 | if (d->fd == fd) return d; |
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93 | } |
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94 | return NULL; |
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95 | } |
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96 | |
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97 | static int owl_select_find_io_dispatch(const owl_io_dispatch *in) |
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98 | { |
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99 | int i, len; |
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100 | const owl_list *dl; |
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101 | |
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102 | if (in != NULL) { |
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103 | dl = owl_global_get_io_dispatch_list(&g); |
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104 | len = owl_list_get_size(dl); |
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105 | for(i = 0; i < len; i++) { |
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106 | const owl_io_dispatch *d = owl_list_get_element(dl, i); |
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107 | if (d == in) return i; |
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108 | } |
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109 | } |
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110 | return -1; |
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111 | } |
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112 | |
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113 | void owl_select_remove_io_dispatch(const owl_io_dispatch *in) |
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114 | { |
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115 | int elt; |
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116 | if (in != NULL) { |
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117 | elt = owl_select_find_io_dispatch(in); |
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118 | if (elt != -1) { |
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119 | owl_list *dl = owl_global_get_io_dispatch_list(&g); |
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120 | owl_io_dispatch *d = owl_list_get_element(dl, elt); |
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121 | if (dispatch_active) |
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122 | d->needs_gc = 1; |
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123 | else { |
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124 | owl_list_remove_element(dl, elt); |
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125 | if (d->destroy) |
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126 | d->destroy(d); |
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127 | owl_free(d); |
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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 | |
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133 | void owl_select_io_dispatch_gc(void) |
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134 | { |
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135 | int i; |
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136 | owl_list *dl; |
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137 | |
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138 | dl = owl_global_get_io_dispatch_list(&g); |
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139 | /* |
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140 | * Count down so we aren't set off by removing items from the list |
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141 | * during the iteration. |
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142 | */ |
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143 | for(i = owl_list_get_size(dl) - 1; i >= 0; i--) { |
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144 | owl_io_dispatch *d = owl_list_get_element(dl, i); |
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145 | if(d->needs_gc) { |
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146 | owl_select_remove_io_dispatch(d); |
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147 | } |
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148 | } |
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149 | } |
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150 | |
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151 | /* Each FD may have at most one dispatcher. |
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152 | * If a new dispatch is added for an FD, the old one is removed. |
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153 | * mode determines what types of events are watched for, and may be any combination of: |
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154 | * OWL_IO_READ, OWL_IO_WRITE, OWL_IO_EXCEPT |
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155 | */ |
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156 | const owl_io_dispatch *owl_select_add_io_dispatch(int fd, int mode, void (*cb)(const owl_io_dispatch *, void *), void (*destroy)(const owl_io_dispatch *), void *data) |
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157 | { |
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158 | owl_io_dispatch *d = owl_malloc(sizeof(owl_io_dispatch)); |
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159 | owl_list *dl = owl_global_get_io_dispatch_list(&g); |
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160 | |
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161 | d->fd = fd; |
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162 | d->needs_gc = 0; |
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163 | d->mode = mode; |
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164 | d->callback = cb; |
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165 | d->destroy = destroy; |
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166 | d->data = data; |
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167 | |
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168 | owl_select_remove_io_dispatch(owl_select_find_io_dispatch_by_fd(fd)); |
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169 | owl_list_append_element(dl, d); |
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170 | |
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171 | return d; |
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172 | } |
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173 | |
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174 | int owl_select_prepare_io_dispatch_fd_sets(fd_set *rfds, fd_set *wfds, fd_set *efds) { |
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175 | int i, len, max_fd; |
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176 | owl_io_dispatch *d; |
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177 | owl_list *dl = owl_global_get_io_dispatch_list(&g); |
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178 | |
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179 | max_fd = 0; |
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180 | len = owl_list_get_size(dl); |
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181 | for (i = 0; i < len; i++) { |
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182 | d = owl_list_get_element(dl, i); |
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183 | if (d->mode & (OWL_IO_READ | OWL_IO_WRITE | OWL_IO_EXCEPT)) { |
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184 | if (max_fd < d->fd) max_fd = d->fd; |
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185 | if (d->mode & OWL_IO_READ) FD_SET(d->fd, rfds); |
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186 | if (d->mode & OWL_IO_WRITE) FD_SET(d->fd, wfds); |
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187 | if (d->mode & OWL_IO_EXCEPT) FD_SET(d->fd, efds); |
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188 | } |
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189 | } |
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190 | return max_fd + 1; |
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191 | } |
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192 | |
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193 | void owl_select_io_dispatch(const fd_set *rfds, const fd_set *wfds, const fd_set *efds, const int max_fd) |
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194 | { |
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195 | int i, len; |
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196 | owl_io_dispatch *d; |
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197 | owl_list *dl = owl_global_get_io_dispatch_list(&g); |
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198 | |
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199 | dispatch_active = 1; |
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200 | len = owl_list_get_size(dl); |
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201 | for (i = 0; i < len; i++) { |
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202 | d = owl_list_get_element(dl, i); |
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203 | if (d->fd < max_fd && d->callback != NULL && |
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204 | ((d->mode & OWL_IO_READ && FD_ISSET(d->fd, rfds)) || |
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205 | (d->mode & OWL_IO_WRITE && FD_ISSET(d->fd, wfds)) || |
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206 | (d->mode & OWL_IO_EXCEPT && FD_ISSET(d->fd, efds)))) { |
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207 | d->callback(d, d->data); |
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208 | } |
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209 | } |
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210 | dispatch_active = 0; |
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211 | owl_select_io_dispatch_gc(); |
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212 | } |
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213 | |
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214 | int owl_select_add_perl_io_dispatch(int fd, int mode, SV *cb) |
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215 | { |
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216 | const owl_io_dispatch *d = owl_select_find_io_dispatch_by_fd(fd); |
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217 | if (d != NULL && d->callback != owl_perlconfig_io_dispatch) { |
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218 | /* Don't mess with non-perl dispatch functions from here. */ |
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219 | return 1; |
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220 | } |
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221 | owl_select_add_io_dispatch(fd, mode, owl_perlconfig_io_dispatch, owl_perlconfig_io_dispatch_destroy, cb); |
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222 | return 0; |
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223 | } |
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224 | |
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225 | int owl_select_remove_perl_io_dispatch(int fd) |
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226 | { |
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227 | const owl_io_dispatch *d = owl_select_find_io_dispatch_by_fd(fd); |
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228 | if (d != NULL && d->callback == owl_perlconfig_io_dispatch) { |
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229 | /* Only remove perl io dispatchers from here. */ |
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230 | owl_select_remove_io_dispatch(d); |
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231 | return 0; |
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232 | } |
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233 | return 1; |
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234 | } |
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235 | |
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236 | int owl_select_aim_hack(fd_set *rfds, fd_set *wfds) |
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237 | { |
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238 | aim_conn_t *cur; |
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239 | aim_session_t *sess; |
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240 | int max_fd; |
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241 | |
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242 | max_fd = 0; |
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243 | sess = owl_global_get_aimsess(&g); |
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244 | for (cur = sess->connlist, max_fd = 0; cur; cur = cur->next) { |
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245 | if (cur->fd != -1) { |
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246 | FD_SET(cur->fd, rfds); |
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247 | if (cur->status & AIM_CONN_STATUS_INPROGRESS) { |
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248 | /* Yes, we're checking writable sockets here. Without it, AIM |
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249 | login is really slow. */ |
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250 | FD_SET(cur->fd, wfds); |
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251 | } |
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252 | |
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253 | if (cur->fd > max_fd) |
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254 | max_fd = cur->fd; |
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255 | } |
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256 | } |
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257 | return max_fd; |
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258 | } |
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259 | |
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260 | void owl_process_input_char(owl_input j) |
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261 | { |
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262 | int ret; |
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263 | |
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264 | owl_global_set_lastinputtime(&g, time(NULL)); |
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265 | ret = owl_keyhandler_process(owl_global_get_keyhandler(&g), j); |
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266 | if (ret!=0 && ret!=1) { |
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267 | owl_function_makemsg("Unable to handle keypress"); |
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268 | } |
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269 | } |
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270 | |
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271 | void owl_select_mask_signals(sigset_t *oldmask) { |
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272 | sigset_t set; |
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273 | |
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274 | sigemptyset(&set); |
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275 | sigaddset(&set, SIGINT); |
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276 | sigprocmask(SIG_BLOCK, &set, oldmask); |
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277 | } |
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278 | |
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279 | void owl_select_handle_intr(sigset_t *restore) |
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280 | { |
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281 | owl_input in; |
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282 | |
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283 | owl_global_unset_interrupted(&g); |
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284 | |
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285 | sigprocmask(SIG_SETMASK, restore, NULL); |
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286 | |
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287 | in.ch = in.uch = owl_global_get_startup_tio(&g)->c_cc[VINTR]; |
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288 | owl_process_input_char(in); |
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289 | } |
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290 | |
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291 | owl_ps_action *owl_select_add_pre_select_action(int (*cb)(owl_ps_action *, void *), void (*destroy)(owl_ps_action *), void *data) |
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292 | { |
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293 | owl_ps_action *a = owl_malloc(sizeof(owl_ps_action)); |
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294 | owl_list *psa_list = owl_global_get_psa_list(&g); |
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295 | a->needs_gc = 0; |
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296 | a->callback = cb; |
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297 | a->destroy = destroy; |
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298 | a->data = data; |
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299 | owl_list_append_element(psa_list, a); |
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300 | return a; |
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301 | } |
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302 | |
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303 | void owl_select_psa_gc(void) |
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304 | { |
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305 | int i; |
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306 | owl_list *psa_list; |
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307 | owl_ps_action *a; |
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308 | |
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309 | psa_list = owl_global_get_psa_list(&g); |
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310 | for (i = owl_list_get_size(psa_list) - 1; i >= 0; i--) { |
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311 | a = owl_list_get_element(psa_list, i); |
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312 | if (a->needs_gc) { |
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313 | owl_list_remove_element(psa_list, i); |
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314 | if (a->destroy) { |
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315 | a->destroy(a); |
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316 | } |
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317 | owl_free(a); |
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318 | } |
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319 | } |
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320 | } |
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321 | |
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322 | void owl_select_remove_pre_select_action(owl_ps_action *a) |
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323 | { |
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324 | a->needs_gc = 1; |
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325 | if (!psa_active) |
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326 | owl_select_psa_gc(); |
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327 | } |
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328 | |
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329 | int owl_select_do_pre_select_actions(void) |
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330 | { |
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331 | int i, len, ret; |
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332 | owl_list *psa_list; |
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333 | |
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334 | psa_active = 1; |
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335 | ret = 0; |
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336 | psa_list = owl_global_get_psa_list(&g); |
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337 | len = owl_list_get_size(psa_list); |
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338 | for (i = 0; i < len; i++) { |
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339 | owl_ps_action *a = owl_list_get_element(psa_list, i); |
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340 | if (a->callback != NULL && a->callback(a, a->data)) { |
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341 | ret = 1; |
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342 | } |
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343 | } |
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344 | psa_active = 0; |
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345 | owl_select_psa_gc(); |
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346 | return ret; |
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347 | } |
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348 | |
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349 | void owl_select(void) |
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350 | { |
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351 | int i, max_fd, max_fd2, aim_done, ret; |
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352 | fd_set r; |
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353 | fd_set w; |
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354 | fd_set e; |
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355 | fd_set aim_rfds, aim_wfds; |
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356 | struct timespec timeout; |
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357 | sigset_t mask; |
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358 | |
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359 | owl_select_process_timers(&timeout); |
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360 | |
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361 | owl_select_mask_signals(&mask); |
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362 | |
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363 | if(owl_global_is_interrupted(&g)) { |
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364 | owl_select_handle_intr(&mask); |
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365 | return; |
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366 | } |
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367 | FD_ZERO(&r); |
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368 | FD_ZERO(&w); |
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369 | FD_ZERO(&e); |
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370 | |
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371 | max_fd = owl_select_prepare_io_dispatch_fd_sets(&r, &w, &e); |
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372 | |
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373 | /* AIM HACK: |
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374 | * |
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375 | * The problem - I'm not sure where to hook into the owl/faim |
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376 | * interface to keep track of when the AIM socket(s) open and |
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377 | * close. In particular, the bosconn thing throws me off. So, |
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378 | * rather than register particular dispatchers for AIM, I look up |
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379 | * the relevant FDs and add them to select's watch lists, then |
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380 | * check for them individually before moving on to the other |
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381 | * dispatchers. --asedeno |
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382 | */ |
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383 | aim_done = 1; |
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384 | FD_ZERO(&aim_rfds); |
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385 | FD_ZERO(&aim_wfds); |
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386 | if (owl_global_is_doaimevents(&g)) { |
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387 | aim_done = 0; |
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388 | max_fd2 = owl_select_aim_hack(&aim_rfds, &aim_wfds); |
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389 | if (max_fd < max_fd2) max_fd = max_fd2; |
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390 | for(i = 0; i <= max_fd2; i++) { |
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391 | if (FD_ISSET(i, &aim_rfds)) { |
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392 | FD_SET(i, &r); |
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393 | FD_SET(i, &e); |
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394 | } |
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395 | if (FD_ISSET(i, &aim_wfds)) { |
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396 | FD_SET(i, &w); |
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397 | FD_SET(i, &e); |
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398 | } |
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399 | } |
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400 | } |
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401 | /* END AIM HACK */ |
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402 | |
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403 | if (owl_select_do_pre_select_actions()) { |
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404 | timeout.tv_sec = 0; |
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405 | timeout.tv_nsec = 0; |
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406 | } |
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407 | |
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408 | ret = pselect(max_fd+1, &r, &w, &e, &timeout, &mask); |
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409 | |
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410 | if(ret < 0 && errno == EINTR) { |
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411 | if(owl_global_is_interrupted(&g)) { |
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412 | owl_select_handle_intr(NULL); |
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413 | } |
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414 | sigprocmask(SIG_SETMASK, &mask, NULL); |
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415 | return; |
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416 | } |
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417 | |
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418 | sigprocmask(SIG_SETMASK, &mask, NULL); |
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419 | |
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420 | if(ret > 0) { |
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421 | /* AIM HACK: process all AIM events at once. */ |
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422 | for(i = 0; !aim_done && i <= max_fd; i++) { |
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423 | if (FD_ISSET(i, &r) || FD_ISSET(i, &w) || FD_ISSET(i, &e)) { |
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424 | if (FD_ISSET(i, &aim_rfds) || FD_ISSET(i, &aim_wfds)) { |
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425 | owl_process_aim(); |
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426 | aim_done = 1; |
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427 | } |
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428 | } |
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429 | } |
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430 | owl_select_io_dispatch(&r, &w, &e, max_fd); |
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431 | } |
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432 | } |
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