1 /*****************************************************************************
2 * modules_plugin.h : Plugin management functions used by the core application.
3 *****************************************************************************
4 * Copyright (C) 2001 VideoLAN
5 * $Id: modules_plugin.h,v 1.7 2002/01/24 13:32:53 sam Exp $
7 * Authors: Samuel Hocevar <sam@zoy.org>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program 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.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
22 *****************************************************************************/
24 /*****************************************************************************
25 * Inline functions for handling dynamic modules
26 *****************************************************************************/
28 /*****************************************************************************
29 * module_load: load a dynamic library
30 *****************************************************************************
31 * This function loads a dynamically linked library using a system dependant
32 * method, and returns a non-zero value on error, zero otherwise.
33 *****************************************************************************/
35 module_load( char * psz_filename, module_handle_t * handle )
38 *handle = load_add_on( psz_filename );
39 return( *handle < 0 );
42 *handle = LoadLibrary( psz_filename );
43 return( *handle == NULL );
45 #elif defined(RTLD_NOW)
46 /* Do not open modules with RTLD_GLOBAL, or we are going to get namespace
47 * collisions when two modules have common public symbols */
48 *handle = dlopen( psz_filename, RTLD_NOW );
49 return( *handle == NULL );
52 *handle = dlopen( psz_filename, DL_LAZY );
53 return( *handle == NULL );
58 /*****************************************************************************
59 * module_unload: unload a dynamic library
60 *****************************************************************************
61 * This function unloads a previously opened dynamically linked library
62 * using a system dependant method. No return value is taken in consideration,
63 * since some libraries sometimes refuse to close properly.
64 *****************************************************************************/
65 static __inline__ void
66 module_unload( module_handle_t handle )
69 unload_add_on( handle );
72 FreeLibrary( handle );
81 /*****************************************************************************
82 * module_getsymbol: get a symbol from a dynamic library
83 *****************************************************************************
84 * This function queries a loaded library for a symbol specified in a
85 * string, and returns a pointer to it. We don't check for dlerror() or
86 * similar functions, since we want a non-NULL symbol anyway.
87 *****************************************************************************/
88 static __inline__ void *
89 module_getsymbol( module_handle_t handle, char * psz_function )
93 if( B_OK == get_image_symbol( handle, psz_function,
94 B_SYMBOL_TYPE_TEXT, &p_symbol ) )
103 #elif defined( SYS_DARWIN )
104 /* MacOS X dl library expects symbols to begin with "_". That's
105 * really lame, but hey, what can we do ? */
106 char * psz_call = malloc( strlen( psz_function ) + 2 );
108 strcpy( psz_call + 1, psz_function );
111 p_return = dlsym( handle, psz_call );
117 return( (void *)GetProcAddress( handle, psz_function ) );
120 return( dlsym( handle, psz_function ) );
125 /*****************************************************************************
126 * module_error: wrapper for dlerror()
127 *****************************************************************************
128 * This function returns the error message of the last module operation. It
129 * returns the string "failed" on systems which do not have the dlerror()
131 *****************************************************************************/
132 static __inline__ const char *
135 #if defined(SYS_BEOS) || defined(WIN32)
144 /*****************************************************************************
145 * STORE_SYMBOLS: store known symbols into p_symbols for plugin access.
146 *****************************************************************************/
148 # define STORE_TRACE_SYMBOLS( p_symbols ) \
149 (p_symbols)->intf_DbgMsg = _intf_DbgMsg; \
150 (p_symbols)->intf_DbgMsgImm = _intf_DbgMsgImm;
152 # define STORE_TRACE_SYMBOLS( p_symbols )
155 #define STORE_SYMBOLS( p_symbols ) \
156 STORE_TRACE_SYMBOLS( p_symbols ) \
157 (p_symbols)->p_main = p_main; \
158 (p_symbols)->p_input_bank = p_input_bank; \
159 (p_symbols)->p_aout_bank = p_aout_bank; \
160 (p_symbols)->p_vout_bank = p_vout_bank; \
161 (p_symbols)->main_GetIntVariable = main_GetIntVariable; \
162 (p_symbols)->main_GetPszVariable = main_GetPszVariable; \
163 (p_symbols)->main_PutIntVariable = main_PutIntVariable; \
164 (p_symbols)->main_PutPszVariable = main_PutPszVariable; \
165 (p_symbols)->intf_Msg = intf_Msg; \
166 (p_symbols)->intf_ErrMsg = intf_ErrMsg; \
167 (p_symbols)->intf_StatMsg = intf_StatMsg;\
168 (p_symbols)->intf_WarnMsg = intf_WarnMsg; \
169 (p_symbols)->intf_WarnMsgImm = intf_WarnMsgImm; \
170 (p_symbols)->intf_PlaylistAdd = intf_PlaylistAdd; \
171 (p_symbols)->intf_PlaylistDelete = intf_PlaylistDelete; \
172 (p_symbols)->intf_PlaylistNext = intf_PlaylistNext; \
173 (p_symbols)->intf_PlaylistPrev = intf_PlaylistPrev; \
174 (p_symbols)->intf_PlaylistDestroy = intf_PlaylistDestroy; \
175 (p_symbols)->intf_PlaylistJumpto = intf_PlaylistJumpto; \
176 (p_symbols)->intf_UrlDecode = intf_UrlDecode; \
177 (p_symbols)->intf_Eject = intf_Eject; \
178 (p_symbols)->msleep = msleep; \
179 (p_symbols)->mdate = mdate; \
180 (p_symbols)->network_ChannelCreate = network_ChannelCreate; \
181 (p_symbols)->network_ChannelJoin = network_ChannelJoin; \
182 (p_symbols)->input_SetProgram = input_SetProgram; \
183 (p_symbols)->input_SetStatus = input_SetStatus; \
184 (p_symbols)->input_Seek = input_Seek; \
185 (p_symbols)->input_DumpStream = input_DumpStream; \
186 (p_symbols)->input_OffsetToTime = input_OffsetToTime; \
187 (p_symbols)->input_ChangeES = input_ChangeES; \
188 (p_symbols)->input_ToggleES = input_ToggleES; \
189 (p_symbols)->input_ChangeArea = input_ChangeArea; \
190 (p_symbols)->input_FindES = input_FindES; \
191 (p_symbols)->input_AddES = input_AddES; \
192 (p_symbols)->input_DelES = input_DelES; \
193 (p_symbols)->input_SelectES = input_SelectES; \
194 (p_symbols)->input_UnselectES = input_UnselectES; \
195 (p_symbols)->input_AddProgram = input_AddProgram; \
196 (p_symbols)->input_DelProgram = input_DelProgram; \
197 (p_symbols)->input_AddArea = input_AddArea; \
198 (p_symbols)->input_DelArea = input_DelArea; \
199 (p_symbols)->InitBitstream = InitBitstream; \
200 (p_symbols)->NextDataPacket = NextDataPacket; \
201 (p_symbols)->BitstreamNextDataPacket = BitstreamNextDataPacket; \
202 (p_symbols)->DecoderError = DecoderError; \
203 (p_symbols)->input_InitStream = input_InitStream; \
204 (p_symbols)->input_EndStream = input_EndStream; \
205 (p_symbols)->input_ParsePES = input_ParsePES; \
206 (p_symbols)->input_GatherPES = input_GatherPES; \
207 (p_symbols)->input_DecodePES = input_DecodePES; \
208 (p_symbols)->input_ParsePS = input_ParsePS; \
209 (p_symbols)->input_DemuxPS = input_DemuxPS; \
210 (p_symbols)->input_DemuxTS = input_DemuxTS; \
211 (p_symbols)->input_DemuxPSI = input_DemuxPSI; \
212 (p_symbols)->input_ClockManageControl = input_ClockManageControl; \
213 (p_symbols)->aout_CreateFifo = aout_CreateFifo; \
214 (p_symbols)->aout_DestroyFifo = aout_DestroyFifo; \
215 (p_symbols)->vout_CreateThread = vout_CreateThread; \
216 (p_symbols)->vout_DestroyThread = vout_DestroyThread; \
217 (p_symbols)->vout_CreateSubPicture = vout_CreateSubPicture; \
218 (p_symbols)->vout_DestroySubPicture = vout_DestroySubPicture; \
219 (p_symbols)->vout_DisplaySubPicture = vout_DisplaySubPicture; \
220 (p_symbols)->vout_CreatePicture = vout_CreatePicture; \
221 (p_symbols)->vout_AllocatePicture = vout_AllocatePicture; \
222 (p_symbols)->vout_DisplayPicture = vout_DisplayPicture; \
223 (p_symbols)->vout_DestroyPicture = vout_DestroyPicture; \
224 (p_symbols)->vout_DatePicture = vout_DatePicture; \
225 (p_symbols)->vout_LinkPicture = vout_LinkPicture; \
226 (p_symbols)->vout_UnlinkPicture = vout_UnlinkPicture; \
227 (p_symbols)->vout_PlacePicture = vout_PlacePicture; \
228 (p_symbols)->UnalignedGetBits = UnalignedGetBits; \
229 (p_symbols)->UnalignedRemoveBits = UnalignedRemoveBits; \
230 (p_symbols)->UnalignedShowBits = UnalignedShowBits; \
231 (p_symbols)->CurrentPTS = CurrentPTS; \
232 (p_symbols)->DecodeLanguage = DecodeLanguage; \
233 (p_symbols)->module_Need = module_Need; \
234 (p_symbols)->module_Unneed = module_Unneed;