07d71f34 |
1 | /* -*-c-*- |
2 | * |
3 | * $Id: reffd.c,v 1.1 1999/07/26 23:33:01 mdw Exp $ |
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 | |
29 | /*----- Revision history --------------------------------------------------* |
30 | * |
31 | * $Log: reffd.c,v $ |
32 | * Revision 1.1 1999/07/26 23:33:01 mdw |
33 | * Infrastructure for the new design. |
34 | * |
35 | */ |
36 | |
37 | /*----- Header files ------------------------------------------------------*/ |
38 | |
39 | #include <stdio.h> |
40 | #include <stdlib.h> |
41 | #include <string.h> |
42 | |
43 | #include <sys/types.h> |
44 | #include <unistd.h> |
45 | |
46 | #include <mLib/sub.h> |
47 | |
48 | #include "reffd.h" |
49 | |
50 | /*----- Main code ---------------------------------------------------------*/ |
51 | |
52 | /* --- @reffd_init@ --- * |
53 | * |
54 | * Arguments: @int fd@ = file descriptor |
55 | * |
56 | * Returns: Reference-counted file descriptor object. |
57 | * |
58 | * Use: Creates a refcounted file descriptor. |
59 | */ |
60 | |
61 | reffd *reffd_init(int fd) |
62 | { |
63 | reffd *r = CREATE(reffd); |
64 | r->fd = fd; |
65 | r->ref = 1; |
66 | r->proc = 0; |
67 | r->p = 0; |
68 | return (r); |
69 | } |
70 | |
71 | /* --- @reffd_handler@ --- * |
72 | * |
73 | * Arguments: @reffd *r@ = pointer to reference counted filehandle |
74 | * @void (*proc)(void *p)@ = procedure to call |
75 | * @void *p@ |
76 | * |
77 | * Returns: --- |
78 | * |
79 | * Use: Sets the reference counted file descriptor to call @proc@ |
80 | * when it is no longer required. |
81 | */ |
82 | |
83 | void reffd_handler(reffd *r, void (*proc)(void *p), void *p) |
84 | { |
85 | r->proc = proc; |
86 | r->p = p; |
87 | } |
88 | |
89 | /* --- @reffd_inc@ --- * |
90 | * |
91 | * Arguments: @reffd *r@ = pointer to reference counted filehandle |
92 | * |
93 | * Returns: --- |
94 | * |
95 | * Use: Increments the reference count for a file descriptor. |
96 | */ |
97 | |
98 | void reffd_inc(reffd *r) { REFFD_INC(r); } |
99 | |
100 | /* --- @reffd_dec@ --- * |
101 | * |
102 | * Arguments: @reffd *r@ = pointer to reference counted filehandle |
103 | * |
104 | * Returns: --- |
105 | * |
106 | * Use: Decrements the reference count for a file descriptor. |
107 | */ |
108 | |
109 | void reffd_dec(reffd *r) { REFFD_DEC(r); } |
110 | |
111 | /*----- That's all, folks -------------------------------------------------*/ |