1 | //vio_pipe.c: |
---|
2 | |
---|
3 | /* |
---|
4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2009 |
---|
5 | * |
---|
6 | * This file is part of libroar a part of RoarAudio, |
---|
7 | * a cross-platform sound system for both, home and professional use. |
---|
8 | * See README for details. |
---|
9 | * |
---|
10 | * This file is free software; you can redistribute it and/or modify |
---|
11 | * it under the terms of the GNU General Public License version 3 |
---|
12 | * as published by the Free Software Foundation. |
---|
13 | * |
---|
14 | * libroar is distributed in the hope that it will be useful, |
---|
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
---|
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
---|
17 | * GNU General Public License for more details. |
---|
18 | * |
---|
19 | * You should have received a copy of the GNU General Public License |
---|
20 | * along with this software; see the file COPYING. If not, write to |
---|
21 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
---|
22 | * |
---|
23 | * NOTE for everyone want's to change something and send patches: |
---|
24 | * read README and HACKING! There a addition information on |
---|
25 | * the license of this document you need to read before you send |
---|
26 | * any patches. |
---|
27 | * |
---|
28 | * NOTE for uses of non-GPL (LGPL,...) software using libesd, libartsc |
---|
29 | * or libpulse*: |
---|
30 | * The libs libroaresd, libroararts and libroarpulse link this lib |
---|
31 | * and are therefore GPL. Because of this it may be illigal to use |
---|
32 | * them with any software that uses libesd, libartsc or libpulse*. |
---|
33 | */ |
---|
34 | |
---|
35 | #include "libroar.h" |
---|
36 | |
---|
37 | int roar_vio_open_pipe (struct roar_vio_calls * s1, struct roar_vio_calls * s2, int type, int flags) { |
---|
38 | struct roar_vio_pipe * self; |
---|
39 | int rw = flags & (O_RDONLY|O_WRONLY|O_RDWR); |
---|
40 | |
---|
41 | if ( s1 == NULL || s2 == NULL ) |
---|
42 | return -1; |
---|
43 | |
---|
44 | if ( (self = malloc(sizeof(struct roar_vio_pipe))) == NULL ) |
---|
45 | return -1; |
---|
46 | |
---|
47 | memset(self, 0, sizeof(struct roar_vio_pipe)); |
---|
48 | |
---|
49 | self->refcount = 2; |
---|
50 | self->type = type; |
---|
51 | self->flags = flags; |
---|
52 | |
---|
53 | if ( type == ROAR_VIO_PIPE_TYPE_AUTO ) { |
---|
54 | #ifdef ROAR_TARGET_WIN32 |
---|
55 | type = ROAR_VIO_PIPE_TYPE_BUFFER; |
---|
56 | #else |
---|
57 | type = ROAR_VIO_PIPE_TYPE_SOCKET; |
---|
58 | #endif |
---|
59 | } |
---|
60 | |
---|
61 | switch (type) { |
---|
62 | case ROAR_VIO_PIPE_TYPE_BUFFER: |
---|
63 | // no buffers need to be set up here, |
---|
64 | // we handle the NULL pointer in the reader and writer func |
---|
65 | break; |
---|
66 | case ROAR_VIO_PIPE_TYPE_PIPE: |
---|
67 | if ( rw == O_RDWR || rw == O_RDONLY ) |
---|
68 | if ( pipe(self->b.p) == -1 ) { |
---|
69 | free(self); |
---|
70 | return -1; |
---|
71 | } |
---|
72 | if ( rw == O_RDWR || rw == O_WRONLY ) |
---|
73 | if ( pipe((self->b.p) + 2) == -1 ) { |
---|
74 | close(self->b.p[0]); |
---|
75 | close(self->b.p[1]); |
---|
76 | free(self); |
---|
77 | return -1; |
---|
78 | } |
---|
79 | break; |
---|
80 | case ROAR_VIO_PIPE_TYPE_SOCKET: |
---|
81 | if ( socketpair(AF_UNIX, SOCK_STREAM, 0, self->b.p) == -1 ) { |
---|
82 | free(self); |
---|
83 | return -1; |
---|
84 | } |
---|
85 | |
---|
86 | if ( rw == O_RDONLY ) { |
---|
87 | shutdown(self->b.p[0], SHUT_WR); |
---|
88 | shutdown(self->b.p[1], SHUT_RD); |
---|
89 | } else if ( rw == O_WRONLY ) { |
---|
90 | shutdown(self->b.p[0], SHUT_RD); |
---|
91 | shutdown(self->b.p[1], SHUT_WR); |
---|
92 | } |
---|
93 | break; |
---|
94 | default: |
---|
95 | free(self); |
---|
96 | return -1; |
---|
97 | } |
---|
98 | |
---|
99 | return 0; |
---|
100 | } |
---|
101 | |
---|
102 | //ll |
---|