[9c7a701] | 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 | /* Returns the index of the dispatch for the file descriptor. */ |
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| 6 | int owl_select_find_dispatch(int fd) |
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| 7 | { |
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| 8 | int i, len; |
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| 9 | owl_list *dl; |
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| 10 | owl_dispatch *d; |
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| 11 | |
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| 12 | dl = owl_global_get_dispatchlist(&g); |
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| 13 | len = owl_list_get_size(dl); |
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| 14 | for(i = 0; i < len; i++) { |
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| 15 | d = (owl_dispatch*)owl_list_get_element(dl, i); |
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| 16 | if (d->fd == fd) return i; |
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| 17 | } |
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| 18 | return -1; |
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| 19 | } |
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| 20 | |
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| 21 | /* Adds a new owl_dispatch to the list, replacing existing ones if needed. */ |
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| 22 | void owl_select_add_dispatch(owl_dispatch *d) |
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| 23 | { |
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| 24 | int elt; |
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| 25 | owl_list *dl; |
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| 26 | |
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| 27 | elt = owl_select_find_dispatch(d->fd); |
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| 28 | dl = owl_global_get_dispatchlist(&g); |
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| 29 | |
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| 30 | if (elt != -1) { /* If we have a dispatch for this FD */ |
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| 31 | owl_dispatch *d_old; |
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| 32 | d_old = (owl_dispatch*)owl_list_get_element(dl, elt); |
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| 33 | /* Ignore if we're adding the same dispatch again. Otherwise |
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| 34 | replace the old dispatch. */ |
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| 35 | if (d_old != d) { |
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| 36 | owl_list_replace_element(dl, elt, d); |
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| 37 | owl_free(d_old); |
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| 38 | } |
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| 39 | } |
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| 40 | else { |
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| 41 | owl_list_append_element(dl, d); |
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| 42 | } |
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| 43 | } |
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| 44 | |
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| 45 | /* Removes an owl_dispatch to the list, based on it's file descriptor. */ |
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| 46 | void owl_select_remove_dispatch(int fd) |
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| 47 | { |
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| 48 | int elt; |
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| 49 | owl_list *dl; |
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| 50 | |
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| 51 | elt = owl_select_find_dispatch(fd); |
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| 52 | dl = owl_global_get_dispatchlist(&g); |
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| 53 | |
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| 54 | if (elt != -1) { |
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| 55 | owl_dispatch *d; |
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| 56 | d = (owl_dispatch*)owl_list_get_element(dl, elt); |
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| 57 | owl_list_remove_element(dl, elt); |
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| 58 | if (d->pfunc) { |
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| 59 | owl_perlconfig_dispatch_free(d); |
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| 60 | } |
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| 61 | owl_free(d); |
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| 62 | } |
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| 63 | } |
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| 64 | |
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| 65 | int owl_select_dispatch_count() |
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| 66 | { |
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| 67 | return owl_list_get_size(owl_global_get_dispatchlist(&g)); |
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| 68 | } |
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| 69 | |
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| 70 | int owl_select_add_perl_dispatch(int fd, SV *cb) |
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| 71 | { |
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| 72 | int elt; |
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| 73 | owl_dispatch *d; |
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| 74 | elt = owl_select_find_dispatch(fd); |
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| 75 | if (elt != -1) { |
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| 76 | d = (owl_dispatch*)owl_list_get_element(owl_global_get_dispatchlist(&g), elt); |
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| 77 | if (d->pfunc == NULL) { |
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| 78 | /* don't mess with non-perl dispatch functions from here. */ |
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| 79 | return 1; |
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| 80 | } |
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| 81 | } |
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| 82 | |
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| 83 | d = malloc(sizeof(owl_dispatch)); |
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| 84 | d->fd = fd; |
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| 85 | d->cfunc = NULL; |
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| 86 | d->pfunc = cb; |
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| 87 | owl_select_add_dispatch(d); |
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| 88 | return 0; |
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| 89 | } |
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| 90 | |
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| 91 | int owl_select_remove_perl_dispatch(int fd) |
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| 92 | { |
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| 93 | int elt; |
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| 94 | owl_dispatch *d; |
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| 95 | |
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| 96 | elt = owl_select_find_dispatch(fd); |
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| 97 | if (elt != -1) { |
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| 98 | d = (owl_dispatch*)owl_list_get_element(owl_global_get_dispatchlist(&g), elt); |
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| 99 | if (d->pfunc != NULL) { |
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| 100 | owl_select_remove_dispatch(fd); |
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| 101 | return 0; |
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| 102 | } |
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| 103 | } |
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| 104 | return 1; |
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| 105 | } |
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| 106 | |
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[6b580b0] | 107 | int owl_select_dispatch_prepare_fd_sets(fd_set *r, fd_set *w, fd_set *e) |
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[9c7a701] | 108 | { |
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| 109 | int i, len, max_fd; |
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| 110 | owl_dispatch *d; |
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| 111 | owl_list *dl; |
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| 112 | |
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| 113 | dl = owl_global_get_dispatchlist(&g); |
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| 114 | FD_ZERO(r); |
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| 115 | FD_ZERO(e); |
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| 116 | max_fd = 0; |
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| 117 | len = owl_select_dispatch_count(g); |
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| 118 | for(i = 0; i < len; i++) { |
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| 119 | d = (owl_dispatch*)owl_list_get_element(dl, i); |
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| 120 | FD_SET(d->fd, r); |
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[6b580b0] | 121 | FD_SET(d->fd, w); |
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[9c7a701] | 122 | FD_SET(d->fd, e); |
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| 123 | if (max_fd < d->fd) max_fd = d->fd; |
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| 124 | } |
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| 125 | return max_fd + 1; |
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| 126 | } |
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| 127 | |
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| 128 | void owl_select_dispatch(fd_set *fds, int max_fd) |
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| 129 | { |
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| 130 | int i, len; |
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| 131 | owl_dispatch *d; |
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| 132 | owl_list *dl; |
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| 133 | |
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| 134 | dl = owl_global_get_dispatchlist(&g); |
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| 135 | len = owl_select_dispatch_count(); |
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| 136 | for(i = 0; i < len; i++) { |
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| 137 | d = (owl_dispatch*)owl_list_get_element(dl, i); |
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[18a54ee] | 138 | /* While d shouldn't normally be null, the list may be altered by |
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| 139 | * functions we dispatch to. */ |
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| 140 | if (d != NULL && FD_ISSET(d->fd, fds)) { |
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[9c7a701] | 141 | if (d->cfunc != NULL) { |
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| 142 | (d->cfunc)(); |
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| 143 | } |
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| 144 | else if (d->pfunc != NULL) { |
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| 145 | owl_perlconfig_do_dispatch(d); |
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| 146 | } |
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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 | int owl_select_aim_hack(fd_set *fds) |
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| 152 | { |
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| 153 | aim_conn_t *cur; |
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| 154 | aim_session_t *sess; |
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| 155 | int max_fd; |
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| 156 | |
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| 157 | FD_ZERO(fds); |
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| 158 | max_fd = 0; |
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| 159 | sess = owl_global_get_aimsess(&g); |
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| 160 | for (cur = sess->connlist, max_fd = 0; cur; cur = cur->next) { |
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| 161 | if (cur->fd != -1) { |
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| 162 | FD_SET(cur->fd, fds); |
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| 163 | if (cur->fd > max_fd) |
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| 164 | max_fd = cur->fd; |
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| 165 | } |
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| 166 | } |
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| 167 | cur = owl_global_get_bosconn(&g); |
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| 168 | if (cur->fd != -1) { |
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| 169 | FD_SET(cur->fd, fds); |
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| 170 | if (cur->fd > max_fd) |
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| 171 | max_fd = cur->fd; |
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| 172 | } |
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| 173 | |
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| 174 | return max_fd; |
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| 175 | } |
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| 176 | |
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| 177 | void owl_select() |
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| 178 | { |
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| 179 | int i, max_fd, aim_max_fd, aim_done; |
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| 180 | fd_set r; |
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| 181 | fd_set w; |
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| 182 | fd_set e; |
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| 183 | fd_set aim_fds; |
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| 184 | struct timeval timeout; |
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| 185 | |
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| 186 | timeout.tv_sec = 1; |
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| 187 | timeout.tv_usec = 0; |
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| 188 | |
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[6b580b0] | 189 | max_fd = owl_select_dispatch_prepare_fd_sets(&r, &w, &e); |
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[9c7a701] | 190 | |
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| 191 | /* AIM HACK: |
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| 192 | * |
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| 193 | * The problem - I'm not sure where to hook into the owl/faim |
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| 194 | * interface to keep track of when the AIM socket(s) open and |
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| 195 | * close. In particular, the bosconn thing throws me off. So, |
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| 196 | * rather than register particular dispatchers for AIM, I look up |
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| 197 | * the relevant FDs and add them to select's watch lists, then |
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| 198 | * check for them individually before moving on to the other |
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| 199 | * dispatchers. --asedeno |
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| 200 | */ |
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| 201 | aim_done = 1; |
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| 202 | FD_ZERO(&aim_fds); |
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| 203 | FD_ZERO(&w); |
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| 204 | if (owl_global_is_doaimevents(&g)) { |
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| 205 | aim_done = 0; |
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| 206 | aim_max_fd = owl_select_aim_hack(&aim_fds); |
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| 207 | if (max_fd < aim_max_fd) max_fd = aim_max_fd; |
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| 208 | for(i = 0; i <= aim_max_fd; i++) { |
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| 209 | if (FD_ISSET(i, &aim_fds)) { |
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| 210 | FD_SET(i, &r); |
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| 211 | FD_SET(i, &w); /* Yes, we're checking writable sockets |
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| 212 | here. Without it, AIM login is really |
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| 213 | slow. */ |
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| 214 | FD_SET(i, &e); |
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| 215 | } |
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| 216 | } |
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| 217 | } |
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| 218 | /* END AIM HACK */ |
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| 219 | |
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| 220 | if ( select(max_fd, &r, &w, &e, &timeout) ) { |
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| 221 | /* Merge fd_sets and clear AIM FDs. */ |
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| 222 | for(i = 0; i <= max_fd; i++) { |
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| 223 | /* Merge all interesting FDs into one set, since we have a |
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| 224 | single dispatch per FD. */ |
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| 225 | if (FD_ISSET(i, &r) || FD_ISSET(i, &w) || FD_ISSET(i, &e)) { |
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| 226 | /* AIM HACK: no separate dispatch, just process here if |
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| 227 | needed, and only once per run through. */ |
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| 228 | if (!aim_done && FD_ISSET(i, &aim_fds)) { |
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| 229 | owl_process_aim(); |
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| 230 | aim_done = 1; |
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| 231 | } |
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| 232 | else { |
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| 233 | FD_SET(i, &r); |
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| 234 | } |
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| 235 | } |
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| 236 | } |
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| 237 | |
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| 238 | /* NOTE: the same dispatch function is called for both exceptional |
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| 239 | and read ready FDs. */ |
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| 240 | owl_select_dispatch(&r, max_fd); |
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| 241 | } |
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| 242 | } |
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