| 1 | /* -*-c-*- |
| 2 | * |
| 3 | * Reference counted file descriptors |
| 4 | * |
| 5 | * (c) 1999 Straylight/Edgeware |
| 6 | */ |
| 7 | |
| 8 | /*----- Licensing notice --------------------------------------------------* |
| 9 | * |
| 10 | * This file is part of the `fw' port forwarder. |
| 11 | * |
| 12 | * `fw' is free software; you can redistribute it and/or modify |
| 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. |
| 16 | * |
| 17 | * `fw' is distributed in the hope that it will be useful, |
| 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. |
| 21 | * |
| 22 | * You should have received a copy of the GNU General Public License |
| 23 | * along with `fw'; if not, write to the Free Software Foundation, |
| 24 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
| 25 | */ |
| 26 | |
| 27 | #include "fw.h" |
| 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 -------------------------------------------------*/ |