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1 | /* -*-c-*- |
2 | * |
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3 | * Reference counted file descriptors |
4 | * |
5 | * (c) 1999 Straylight/Edgeware |
6 | */ |
7 | |
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8 | /*----- Licensing notice --------------------------------------------------* |
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9 | * |
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10 | * This file is part of the `fwd' port forwarder. |
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11 | * |
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12 | * `fwd' is free software; you can redistribute it and/or modify |
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13 | * it under the terms of the GNU General Public License as published by |
14 | * the Free Software Foundation; either version 2 of the License, or |
15 | * (at your option) any later version. |
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16 | * |
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17 | * `fwd' is distributed in the hope that it will be useful, |
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18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
20 | * GNU General Public License for more details. |
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21 | * |
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22 | * You should have received a copy of the GNU General Public License |
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23 | * along with `fwd'; if not, write to the Free Software Foundation, |
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24 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
25 | */ |
26 | |
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27 | #include "fwd.h" |
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28 | |
29 | /*----- Main code ---------------------------------------------------------*/ |
30 | |
31 | /* --- @reffd_init@ --- * |
32 | * |
33 | * Arguments: @int fd@ = file descriptor |
34 | * |
35 | * Returns: Reference-counted file descriptor object. |
36 | * |
37 | * Use: Creates a refcounted file descriptor. |
38 | */ |
39 | |
40 | reffd *reffd_init(int fd) |
41 | { |
42 | reffd *r = CREATE(reffd); |
43 | r->fd = fd; |
44 | r->ref = 1; |
45 | r->proc = 0; |
46 | r->p = 0; |
47 | return (r); |
48 | } |
49 | |
50 | /* --- @reffd_handler@ --- * |
51 | * |
52 | * Arguments: @reffd *r@ = pointer to reference counted filehandle |
53 | * @void (*proc)(void *p)@ = procedure to call |
54 | * @void *p@ |
55 | * |
56 | * Returns: --- |
57 | * |
58 | * Use: Sets the reference counted file descriptor to call @proc@ |
59 | * when it is no longer required. |
60 | */ |
61 | |
62 | void reffd_handler(reffd *r, void (*proc)(void *p), void *p) |
63 | { |
64 | r->proc = proc; |
65 | r->p = p; |
66 | } |
67 | |
68 | /* --- @reffd_inc@ --- * |
69 | * |
70 | * Arguments: @reffd *r@ = pointer to reference counted filehandle |
71 | * |
72 | * Returns: --- |
73 | * |
74 | * Use: Increments the reference count for a file descriptor. |
75 | */ |
76 | |
77 | void reffd_inc(reffd *r) { REFFD_INC(r); } |
78 | |
79 | /* --- @reffd_dec@ --- * |
80 | * |
81 | * Arguments: @reffd *r@ = pointer to reference counted filehandle |
82 | * |
83 | * Returns: --- |
84 | * |
85 | * Use: Decrements the reference count for a file descriptor. |
86 | */ |
87 | |
88 | void reffd_dec(reffd *r) { REFFD_DEC(r); } |
89 | |
90 | /*----- That's all, folks -------------------------------------------------*/ |