source: roaraudio/libroar/roardl.c @ 3300:6ab4977e3043

Last change on this file since 3300:6ab4977e3043 was 3300:6ab4977e3043, checked in by phi, 14 years ago

load plugins, write plugin macro

File size: 3.1 KB
Line 
1//roardl.c:
2
3/*
4 *      Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2010
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#if defined(ROAR_HAVE_LIBDL)
38static void * _roardl2ldl (struct roar_dl_lhandle * lhandle) {
39 if ( lhandle == ROAR_DL_HANDLE_DEFAULT )
40  return RTLD_DEFAULT;
41
42 if ( lhandle == ROAR_DL_HANDLE_NEXT )
43  return RTLD_NEXT;
44
45 return lhandle->handle;
46}
47#endif
48
49struct roar_dl_lhandle * roar_dl_open(const char * filename, int flags, int ra_init) {
50 struct roar_dl_lhandle * ret = NULL;
51
52 if ( ret == NULL )
53  return NULL;
54
55 if ( ra_init ) {
56  roar_dl_ra_init(ret, NULL);
57 }
58
59 return ret;
60}
61
62int                      roar_dl_close(struct roar_dl_lhandle * lhandle) {
63#if defined(ROAR_HAVE_LIBDL)
64 return dlclose(_roardl2ldl(lhandle));
65#else
66 return -1;
67#endif
68}
69
70void                   * roar_dl_getsym(struct roar_dl_lhandle * lhandle, const char * sym, int type) {
71#if defined(ROAR_HAVE_LIBDL)
72 return dlsym(_roardl2ldl(lhandle), sym);
73#else
74 return NULL;
75#endif
76}
77
78int                      roar_dl_ra_init(struct roar_dl_lhandle * lhandle, const char * prefix) {
79#define _SUFFIX "_roaraudio_library_init"
80 char name[80] = _SUFFIX;
81 struct roar_dl_libraryinst * (*func)(struct roar_dl_librarypara * para);
82 struct roar_dl_libraryinst * lib;
83 struct roar_dl_librarypara * para = NULL;
84 int i;
85
86 if ( (void*)lhandle < (void*)128 && prefix == NULL )
87  return -1;
88
89 if ( prefix != NULL ) {
90  strcpy(name, "_");
91  strcat(name, prefix);
92  strcat(name, "_");
93  strcat(name, _SUFFIX);
94 }
95
96 if ( (func = roar_dl_getsym(lhandle, name, -1)) == NULL )
97  return -1;
98
99 lib = func(para);
100
101 if ( lib == NULL )
102  return -1;
103
104 if ( lib->version != ROAR_DL_LIBINST_VERSION )
105  return -1;
106
107 if ( sizeof(struct roar_dl_libraryinst) > lib->len )
108  return -1;
109
110 for (i = 0; i < ROAR_DL_FN_MAX; i++) {
111  if ( lib->func[i] != NULL )
112   lib->func[i](para, lib);
113 }
114
115 // do something with lib here.
116
117 return -1;
118}
119
120//ll
Note: See TracBrowser for help on using the repository browser.