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1 | /* -*-c-*- |
2 | * |
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3 | * $Id: reffd.c,v 1.2 2004/04/08 01:36:25 mdw Exp $ |
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4 | * |
5 | * Reference counted file descriptors |
6 | * |
7 | * (c) 1999 Straylight/Edgeware |
8 | */ |
9 | |
10 | /*----- Licensing notice --------------------------------------------------* |
11 | * |
12 | * This file is part of the `fw' port forwarder. |
13 | * |
14 | * `fw' is free software; you can redistribute it and/or modify |
15 | * it under the terms of the GNU General Public License as published by |
16 | * the Free Software Foundation; either version 2 of the License, or |
17 | * (at your option) any later version. |
18 | * |
19 | * `fw' is distributed in the hope that it will be useful, |
20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
22 | * GNU General Public License for more details. |
23 | * |
24 | * You should have received a copy of the GNU General Public License |
25 | * along with `fw'; if not, write to the Free Software Foundation, |
26 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
27 | */ |
28 | |
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29 | /*----- Header files ------------------------------------------------------*/ |
30 | |
31 | #include <stdio.h> |
32 | #include <stdlib.h> |
33 | #include <string.h> |
34 | |
35 | #include <sys/types.h> |
36 | #include <unistd.h> |
37 | |
38 | #include <mLib/sub.h> |
39 | |
40 | #include "reffd.h" |
41 | |
42 | /*----- Main code ---------------------------------------------------------*/ |
43 | |
44 | /* --- @reffd_init@ --- * |
45 | * |
46 | * Arguments: @int fd@ = file descriptor |
47 | * |
48 | * Returns: Reference-counted file descriptor object. |
49 | * |
50 | * Use: Creates a refcounted file descriptor. |
51 | */ |
52 | |
53 | reffd *reffd_init(int fd) |
54 | { |
55 | reffd *r = CREATE(reffd); |
56 | r->fd = fd; |
57 | r->ref = 1; |
58 | r->proc = 0; |
59 | r->p = 0; |
60 | return (r); |
61 | } |
62 | |
63 | /* --- @reffd_handler@ --- * |
64 | * |
65 | * Arguments: @reffd *r@ = pointer to reference counted filehandle |
66 | * @void (*proc)(void *p)@ = procedure to call |
67 | * @void *p@ |
68 | * |
69 | * Returns: --- |
70 | * |
71 | * Use: Sets the reference counted file descriptor to call @proc@ |
72 | * when it is no longer required. |
73 | */ |
74 | |
75 | void reffd_handler(reffd *r, void (*proc)(void *p), void *p) |
76 | { |
77 | r->proc = proc; |
78 | r->p = p; |
79 | } |
80 | |
81 | /* --- @reffd_inc@ --- * |
82 | * |
83 | * Arguments: @reffd *r@ = pointer to reference counted filehandle |
84 | * |
85 | * Returns: --- |
86 | * |
87 | * Use: Increments the reference count for a file descriptor. |
88 | */ |
89 | |
90 | void reffd_inc(reffd *r) { REFFD_INC(r); } |
91 | |
92 | /* --- @reffd_dec@ --- * |
93 | * |
94 | * Arguments: @reffd *r@ = pointer to reference counted filehandle |
95 | * |
96 | * Returns: --- |
97 | * |
98 | * Use: Decrements the reference count for a file descriptor. |
99 | */ |
100 | |
101 | void reffd_dec(reffd *r) { REFFD_DEC(r); } |
102 | |
103 | /*----- That's all, folks -------------------------------------------------*/ |