1 /*****************************************************************************
2 * modules_macros.h : Macros used from within a module.
3 *****************************************************************************
4 * Copyright (C) 2001-2006 the VideoLAN team
5 * Copyright © 2007-2008 Rémi Denis-Courmont
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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
24 #ifndef LIBVLC_MODULES_MACROS_H
25 # define LIBVLC_MODULES_MACROS_H 1
27 /*****************************************************************************
28 * If we are not within a module, assume we're in the vlc core.
29 *****************************************************************************/
30 #if !defined( __PLUGIN__ ) && !defined( __BUILTIN__ )
31 # define MODULE_NAME main
35 * Current plugin ABI version
37 # define MODULE_SYMBOL 0_9_0k
38 # define MODULE_SUFFIX "__0_9_0k"
40 /*****************************************************************************
41 * Add a few defines. You do not want to read this section. Really.
42 *****************************************************************************/
46 * if user has #defined MODULE_NAME foo, then we will need:
47 * #define MODULE_STRING "foo"
49 * and, if HAVE_DYNAMIC_PLUGINS is NOT set, we will also need:
50 * #define MODULE_FUNC( zog ) module_foo_zog
52 * this can't easily be done with the C preprocessor, thus a few ugly hacks.
55 /* I can't believe I need to do this to change « foo » to « "foo" » */
56 #define STRINGIFY( z ) UGLY_KLUDGE( z )
57 #define UGLY_KLUDGE( z ) #z
58 /* And I need to do _this_ to change « foo bar » to « module_foo_bar » ! */
59 #define CONCATENATE( y, z ) CRUDE_HACK( y, z )
60 #define CRUDE_HACK( y, z ) y##__##z
62 /* If the module is built-in, then we need to define foo_InitModule instead
63 * of InitModule. Same for Activate- and DeactivateModule. */
65 # define E_( function ) CONCATENATE( function, MODULE_SYMBOL )
66 # define __VLC_SYMBOL( symbol ) CONCATENATE( symbol, MODULE_SYMBOL )
68 # define E_( function ) CONCATENATE( function, MODULE_NAME )
69 # define __VLC_SYMBOL( symbol ) CONCATENATE( symbol, MODULE_NAME )
72 #if defined( __PLUGIN__ ) && ( defined( WIN32 ) || defined( UNDER_CE ) )
73 # define DLL_SYMBOL __declspec(dllexport)
74 # define CDECL_SYMBOL __cdecl
75 #elif defined (HAVE_ATTRIBUTE_VISIBILITY)
76 # define DLL_SYMBOL __attribute__((visibility("default")))
83 #if defined( __cplusplus )
84 # define EXTERN_SYMBOL extern "C"
86 # define EXTERN_SYMBOL
89 #if defined( USE_DLL )
90 # define IMPORT_SYMBOL __declspec(dllimport)
92 # define IMPORT_SYMBOL
95 #define MODULE_STRING STRINGIFY( MODULE_NAME )
98 * InitModule: this function is called once and only once, when the module
99 * is looked at for the first time. We get the useful data from it, for
100 * instance the module name, its shortcuts, its capabilities... we also create
101 * a copy of its config because the module can be unloaded at any time.
103 #if defined (__PLUGIN__) || defined (__BUILTIN__)
104 EXTERN_SYMBOL DLL_SYMBOL int CDECL_SYMBOL
105 E_(vlc_entry) ( module_t *p_module );
108 #define vlc_module_begin( ) \
109 EXTERN_SYMBOL DLL_SYMBOL int CDECL_SYMBOL \
110 __VLC_SYMBOL(vlc_entry) ( module_t *p_module ) \
112 module_config_t *p_config = NULL; \
113 if (vlc_module_set (p_module, VLC_MODULE_NAME, \
114 (const char *)(MODULE_STRING))) \
117 module_t *p_submodule = p_module /* the ; gets added */
119 #define vlc_module_end( ) \
122 return VLC_SUCCESS; \
125 return VLC_EGENERIC; \
127 struct _u_n_u_s_e_d_ /* the ; gets added */
130 #define add_submodule( ) \
131 p_submodule = vlc_submodule_create( p_module )
133 #define add_requirement( cap ) \
134 if (vlc_module_set (p_module, VLC_MODULE_CPU_REQUIREMENT, \
135 (int)(CPU_CAPABILITY_##cap))) \
138 #define add_shortcut( shortcut ) \
139 if (vlc_module_set (p_submodule, VLC_MODULE_SHORTCUT, (int)(shortcut))) \
142 #define set_shortname( shortname ) \
143 if (vlc_module_set (p_submodule, VLC_MODULE_SHORTNAME, \
144 (const char *)(shortname))) \
147 #define set_description( desc ) \
148 if (vlc_module_set (p_submodule, VLC_MODULE_DESCRIPTION, \
149 (const char *)(desc))) \
152 #define set_help( help ) \
153 if (vlc_module_set (p_submodule, VLC_MODULE_HELP, (const char *)(help))) \
156 #define set_capability( cap, score ) \
157 if (vlc_module_set (p_submodule, VLC_MODULE_CAPABILITY, (int)(cap)) \
158 || vlc_module_set (p_submodule, VLC_MODULE_SCORE, (int)(score))) \
161 #define set_callbacks( activate, deactivate ) \
162 if (vlc_module_set (p_submodule, VLC_MODULE_CB_OPEN, activate) \
163 || vlc_module_set (p_submodule, VLC_MODULE_CB_CLOSE, deactivate)) \
166 #define linked_with_a_crap_library_which_uses_atexit( ) \
167 if (vlc_module_set (p_submodule, VLC_MODULE_NO_UNLOAD)) \
170 VLC_EXPORT( module_t *, vlc_module_create, ( vlc_object_t * ) );
171 VLC_EXPORT( module_t *, vlc_submodule_create, ( module_t * ) );
172 VLC_EXPORT( int, vlc_module_set, (module_t *module, int propid, ...) );
174 enum vlc_module_properties
176 /* DO NOT EVER REMOVE, INSERT OR REPLACE ANY ITEM! It would break the ABI!
177 * Append new items at the end ONLY. */
178 VLC_MODULE_CPU_REQUIREMENT,
180 VLC_MODULE_SHORTNAME,
181 VLC_MODULE_DESCRIPTION,
183 VLC_MODULE_CAPABILITY,
188 VLC_MODULE_NO_UNLOAD,