source: roaraudio/libroar/roardl.c @ 3366:87662a639844

Last change on this file since 3366:87662a639844 was 3366:87662a639844, checked in by phi, 14 years ago

set RTLD_DEEPBIND if we have it

File size: 4.3 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 // early errors just return.
53
54 if ( flags != ROAR_DL_FLAG_DEFAUTS )
55  return NULL;
56
57 if ( (ret = roar_mm_malloc(sizeof(struct roar_dl_lhandle))) == NULL )
58  return NULL;
59
60 memset(ret, 0, sizeof(struct roar_dl_lhandle));
61
62#if defined(ROAR_HAVE_LIBDL)
63 flags  = RTLD_NOW;
64
65#ifdef RTLD_DEEPBIND
66 flags |= RTLD_DEEPBIND;
67#endif
68
69 ret->handle = dlopen(filename, flags);
70
71 if ( ret->handle == NULL ) {
72  roar_mm_free(ret);
73  return NULL;
74 }
75#else
76 roar_mm_free(ret);
77 return NULL;
78#endif
79
80 if ( ret == NULL )
81  return NULL;
82
83 if ( ra_init ) {
84  roar_dl_ra_init(ret, NULL);
85 }
86
87 return ret;
88}
89
90int                      roar_dl_close(struct roar_dl_lhandle * lhandle) {
91 int ret = -1;
92
93 if ( lhandle == ROAR_DL_HANDLE_DEFAULT )
94  return -1;
95 if ( lhandle == ROAR_DL_HANDLE_NEXT )
96  return -1;
97
98 if ( lhandle->lib != NULL && lhandle->lib->unload != NULL )
99  lhandle->lib->unload(lhandle->para, lhandle->lib);
100
101#if defined(ROAR_HAVE_LIBDL)
102 ret = dlclose(_roardl2ldl(lhandle));
103#else
104 ret = -1;
105#endif
106
107 roar_mm_free(lhandle);
108
109 return ret;
110}
111
112void                   * roar_dl_getsym(struct roar_dl_lhandle * lhandle, const char * sym, int type) {
113#if defined(ROAR_HAVE_LIBDL)
114 return dlsym(_roardl2ldl(lhandle), sym);
115#else
116 return NULL;
117#endif
118}
119
120int                      roar_dl_ra_init(struct roar_dl_lhandle * lhandle, const char * prefix) {
121#define _SUFFIX "_roaraudio_library_init"
122 char name[80] = _SUFFIX;
123 struct roar_dl_libraryinst * (*func)(struct roar_dl_librarypara * para);
124 struct roar_dl_libraryinst * lib;
125 struct roar_dl_librarypara * para = NULL;
126 int i;
127
128 if ( (void*)lhandle < (void*)128 ) {
129  if ( prefix == NULL )
130   return -1;
131 } else {
132  para = lhandle->para;
133 }
134
135
136 if ( prefix != NULL ) {
137  strcpy(name, "_");
138  strcat(name, prefix);
139  strcat(name, _SUFFIX);
140 }
141
142 ROAR_DBG("roar_dl_ra_init(lhandle=%p, prefix='%s'): name='%s'", lhandle, prefix, name);
143
144 if ( (func = roar_dl_getsym(lhandle, name, -1)) == NULL )
145  return -1;
146
147 ROAR_DBG("roar_dl_ra_init(lhandle=%p, prefix='%s'): func=%p", lhandle, prefix, func);
148
149 lib = func(para);
150
151 if ( lib == NULL )
152  return -1;
153
154 if ( lib->version != ROAR_DL_LIBINST_VERSION )
155  return -1;
156
157 if ( sizeof(struct roar_dl_libraryinst) > lib->len )
158  return -1;
159
160 if ( !((void*)lhandle < (void*)128) ) {
161  lhandle->lib = lib;
162 }
163
164 for (i = 0; i < ROAR_DL_FN_MAX; i++) {
165  if ( lib->func[i] != NULL )
166   lib->func[i](para, lib);
167 }
168
169 return 0;
170}
171
172char *                   roar_dl_errstr(struct roar_dl_lhandle * lhandle) {
173#if defined(ROAR_HAVE_LIBDL)
174 return dlerror();
175#else
176 return NULL;
177#endif
178}
179
180//ll
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