| 1 | /* |
1 | /* |
| 2 | * libev select fd activity backend |
2 | * libev select fd activity backend |
| 3 | * |
3 | * |
| 4 | * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> |
4 | * Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de> |
| 5 | * All rights reserved. |
5 | * All rights reserved. |
| 6 | * |
6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without modifica- |
7 | * Redistribution and use in source and binary forms, with or without modifica- |
| 8 | * tion, are permitted provided that the following conditions are met: |
8 | * tion, are permitted provided that the following conditions are met: |
| 9 | * |
9 | * |
| … | |
… | |
| 52 | #endif |
52 | #endif |
| 53 | |
53 | |
| 54 | #if EV_SELECT_IS_WINSOCKET |
54 | #if EV_SELECT_IS_WINSOCKET |
| 55 | # undef EV_SELECT_USE_FD_SET |
55 | # undef EV_SELECT_USE_FD_SET |
| 56 | # define EV_SELECT_USE_FD_SET 1 |
56 | # define EV_SELECT_USE_FD_SET 1 |
| 57 | # undef EINTR |
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| 58 | # define EINTR WSAEINTR |
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| 59 | # undef EBADF |
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| 60 | # define EBADF WSAENOTSOCK |
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| 61 | # undef ENOMEM |
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| 62 | # define ENOMEM (errno + 1) |
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| 63 | #endif |
57 | #endif |
| 64 | |
58 | |
| 65 | #if !EV_SELECT_USE_FD_SET |
59 | #if !EV_SELECT_USE_FD_SET |
| 66 | # define NFDBYTES (NFDBITS / 8) |
60 | # define NFDBYTES (NFDBITS / 8) |
| 67 | #endif |
61 | #endif |
| … | |
… | |
| 93 | else |
87 | else |
| 94 | FD_CLR (handle, (fd_set *)vec_wi); |
88 | FD_CLR (handle, (fd_set *)vec_wi); |
| 95 | |
89 | |
| 96 | #else |
90 | #else |
| 97 | |
91 | |
| 98 | int word = fd / NFDBITS; |
92 | int word = fd / NFDBITS; |
| 99 | int mask = 1UL << (fd % NFDBITS); |
93 | fd_mask mask = 1UL << (fd % NFDBITS); |
| 100 | |
94 | |
| 101 | if (expect_false (vec_max < word + 1)) |
95 | if (expect_false (vec_max <= word)) |
| 102 | { |
96 | { |
| 103 | int new_max = word + 1; |
97 | int new_max = word + 1; |
| 104 | |
98 | |
| 105 | vec_ri = ev_realloc (vec_ri, new_max * NFDBYTES); |
99 | vec_ri = ev_realloc (vec_ri, new_max * NFDBYTES); |
| 106 | vec_ro = ev_realloc (vec_ro, new_max * NFDBYTES); /* could free/malloc */ |
100 | vec_ro = ev_realloc (vec_ro, new_max * NFDBYTES); /* could free/malloc */ |
| 107 | vec_wi = ev_realloc (vec_wi, new_max * NFDBYTES); |
101 | vec_wi = ev_realloc (vec_wi, new_max * NFDBYTES); |
| 108 | vec_wo = ev_realloc (vec_wo, new_max * NFDBYTES); /* could free/malloc */ |
102 | vec_wo = ev_realloc (vec_wo, new_max * NFDBYTES); /* could free/malloc */ |
| 109 | |
103 | |
| 110 | for (; vec_max < new_max; ++vec_max) |
104 | for (; vec_max < new_max; ++vec_max) |
| 111 | ((fd_mask *)vec_ri)[vec_max] = |
105 | ((fd_mask *)vec_ri) [vec_max] = |
| 112 | ((fd_mask *)vec_wi)[vec_max] = 0; |
106 | ((fd_mask *)vec_wi) [vec_max] = 0; |
| 113 | } |
107 | } |
| 114 | |
108 | |
| 115 | ((fd_mask *)vec_ri) [word] |= mask; |
109 | ((fd_mask *)vec_ri) [word] |= mask; |
| 116 | if (!(nev & EV_READ)) |
110 | if (!(nev & EV_READ)) |
| 117 | ((fd_mask *)vec_ri) [word] &= ~mask; |
111 | ((fd_mask *)vec_ri) [word] &= ~mask; |
| … | |
… | |
| 144 | |
138 | |
| 145 | if (expect_false (res < 0)) |
139 | if (expect_false (res < 0)) |
| 146 | { |
140 | { |
| 147 | #if EV_SELECT_IS_WINSOCKET |
141 | #if EV_SELECT_IS_WINSOCKET |
| 148 | errno = WSAGetLastError (); |
142 | errno = WSAGetLastError (); |
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143 | #endif |
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144 | #ifdef WSABASEERR |
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145 | /* on windows, select returns incompatible error codes, fix this */ |
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146 | if (errno >= WSABASEERR && errno < WSABASEERR + 1000) |
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147 | if (errno == WSAENOTSOCK) |
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148 | errno = EBADF; |
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149 | else |
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150 | errno -= WSABASEERR; |
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151 | #endif |
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152 | |
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153 | #ifdef _WIN32 |
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154 | /* select on windows errornously returns EINVAL when no fd sets have been |
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155 | * provided (this is documented). what microsoft doesn't tell you that this bug |
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156 | * exists even when the fd sets are provided, so we have to check for this bug |
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157 | * here and emulate by sleeping manually. |
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158 | * we also get EINVAL when the timeout is invalid, but we ignore this case here |
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159 | * and assume that EINVAL always means: you have to wait manually. |
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160 | */ |
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161 | if (errno == EINVAL) |
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162 | { |
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163 | ev_sleep (timeout); |
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164 | return; |
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165 | } |
| 149 | #endif |
166 | #endif |
| 150 | |
167 | |
| 151 | if (errno == EBADF) |
168 | if (errno == EBADF) |
| 152 | fd_ebadf (EV_A); |
169 | fd_ebadf (EV_A); |
| 153 | else if (errno == ENOMEM && !syserr_cb) |
170 | else if (errno == ENOMEM && !syserr_cb) |
