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| 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 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 |
7 | * Redistribution and use in source and binary forms, with or without modifica- |
| 8 | * modification, are permitted provided that the following conditions are |
8 | * tion, are permitted provided that the following conditions are met: |
| 9 | * met: |
9 | * |
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10 | * 1. Redistributions of source code must retain the above copyright notice, |
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11 | * this list of conditions and the following disclaimer. |
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12 | * |
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13 | * 2. Redistributions in binary form must reproduce the above copyright |
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14 | * notice, this list of conditions and the following disclaimer in the |
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15 | * documentation and/or other materials provided with the distribution. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
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18 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- |
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19 | * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
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20 | * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- |
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21 | * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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22 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
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23 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
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24 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- |
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25 | * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
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26 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
| 10 | * |
27 | * |
| 11 | * * Redistributions of source code must retain the above copyright |
28 | * Alternatively, the contents of this file may be used under the terms of |
| 12 | * notice, this list of conditions and the following disclaimer. |
29 | * the GNU General Public License ("GPL") version 2 or any later version, |
| 13 | * |
30 | * in which case the provisions of the GPL are applicable instead of |
| 14 | * * Redistributions in binary form must reproduce the above |
31 | * the above. If you wish to allow the use of your version of this file |
| 15 | * copyright notice, this list of conditions and the following |
32 | * only under the terms of the GPL and not to allow others to use your |
| 16 | * disclaimer in the documentation and/or other materials provided |
33 | * version of this file under the BSD license, indicate your decision |
| 17 | * with the distribution. |
34 | * by deleting the provisions above and replace them with the notice |
| 18 | * |
35 | * and other provisions required by the GPL. If you do not delete the |
| 19 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
36 | * provisions above, a recipient may use your version of this file under |
| 20 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
37 | * either the BSD or the GPL. |
| 21 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
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| 22 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
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| 23 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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| 24 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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| 25 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 26 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 27 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 28 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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| 29 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 30 | */ |
38 | */ |
| 31 | |
39 | |
| 32 | #ifndef _WIN32 |
40 | #ifndef _WIN32 |
| 33 | /* for unix systems */ |
41 | /* for unix systems */ |
| 34 | # include <sys/select.h> |
42 | # include <sys/select.h> |
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| 85 | else |
93 | else |
| 86 | FD_CLR (handle, (fd_set *)vec_wi); |
94 | FD_CLR (handle, (fd_set *)vec_wi); |
| 87 | |
95 | |
| 88 | #else |
96 | #else |
| 89 | |
97 | |
| 90 | int word = fd / NFDBITS; |
98 | int word = fd / NFDBITS; |
| 91 | int mask = 1UL << (fd % NFDBITS); |
99 | fd_mask mask = 1UL << (fd % NFDBITS); |
| 92 | |
100 | |
| 93 | if (expect_false (vec_max < word + 1)) |
101 | if (expect_false (vec_max < word + 1)) |
| 94 | { |
102 | { |
| 95 | int new_max = word + 1; |
103 | int new_max = word + 1; |
| 96 | |
104 | |
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| 98 | vec_ro = ev_realloc (vec_ro, new_max * NFDBYTES); /* could free/malloc */ |
106 | vec_ro = ev_realloc (vec_ro, new_max * NFDBYTES); /* could free/malloc */ |
| 99 | vec_wi = ev_realloc (vec_wi, new_max * NFDBYTES); |
107 | vec_wi = ev_realloc (vec_wi, new_max * NFDBYTES); |
| 100 | vec_wo = ev_realloc (vec_wo, new_max * NFDBYTES); /* could free/malloc */ |
108 | vec_wo = ev_realloc (vec_wo, new_max * NFDBYTES); /* could free/malloc */ |
| 101 | |
109 | |
| 102 | for (; vec_max < new_max; ++vec_max) |
110 | for (; vec_max < new_max; ++vec_max) |
| 103 | ((fd_mask *)vec_ri)[vec_max] = |
111 | ((fd_mask *)vec_ri) [vec_max] = |
| 104 | ((fd_mask *)vec_wi)[vec_max] = 0; |
112 | ((fd_mask *)vec_wi) [vec_max] = 0; |
| 105 | } |
113 | } |
| 106 | |
114 | |
| 107 | ((fd_mask *)vec_ri) [word] |= mask; |
115 | ((fd_mask *)vec_ri) [word] |= mask; |
| 108 | if (!(nev & EV_READ)) |
116 | if (!(nev & EV_READ)) |
| 109 | ((fd_mask *)vec_ri) [word] &= ~mask; |
117 | ((fd_mask *)vec_ri) [word] &= ~mask; |
