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5451db06bd
`loaders' list management into a new SList ADT. In the process, the API for writing loaders is a little cleaner, so all the existing loaders were tweaked to take advantage of that: * libltdl/slist.h, libltdl/slist.c: New files implementing a generic singly linked list container ADT. The ADT is purely internal, and none of its API's are visible from an installed libltdl. * libltdl/lt_dlloader.h (lt_dlloader): Removed next field again :-) Renamed to lt_dlvtable for API. Changed all callers. (lt_dlloader_get): New function to turn an lt_dlloader into its associated lt_dlvtable. (lt_dlloader_add): Removed unused data parameter. The caller data belongs to (and is set by) the loader itself, not the loader's client. Changed all callers. (lt_dlloader_name, lt_dlloader_data): Removed. Use lt_dlloader_get instead! * libltdl/lt__private.h: Include slist.h. (lt__alloc_die_callback): Add missing LT_SCOPE to declaration. (lt_dlhandle_struct): Use lt_dlvtable instead of opaque lt_dlloader. * libltdl/ltdl.c (lt_dlexit): Rewritten for the new loader API. (loaders, lt_dlloader_add, lt_dlloader_remove, lt_dlloader_next, lt_dlloader_find): Moved from here... * libltdl/lt_dlloader.c ((loaders, lt_dlloader_add, lt_dlloader_remove, lt_dlloader_next, lt_dlloader_find): ...to here. And rewritten in terms of new SList interface. * libltdl/ltdl.c (lt_dlexit, tryall_dlopen): Rewritten in terms of new lt_dlloader interface. * libltdl/Makefile.am (libdlloader_la_SOURCES): Add slist.h and slist.c. Move lt_dlloader.h from here... (pkginclude_HEADERS): ...to here. (libltdl_la_SOURCES): Add lt_dlloader.c and lt_dlloader.h.
84 lines
2.9 KiB
C
84 lines
2.9 KiB
C
/* lt_dlloader.h -- dynamic library loader interface
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Copyright (C) 2004 Free Software Foundation, Inc.
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Originally by Gary V. Vaughan <gary@gnu.org>
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NOTE: The canonical source of this file is maintained with the
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GNU Libtool package. Report bugs to bug-libtool@gnu.org.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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As a special exception to the GNU Lesser General Public License,
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if you distribute this file as part of a program or library that
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is built using GNU libtool, you may include it under the same
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distribution terms that you use for the rest of that program.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA
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*/
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#if !defined(LT_DLLOADER_H)
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#define LT_DLLOADER_H 1
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#include <libltdl/lt_system.h>
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LT_BEGIN_C_DECLS
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typedef void * lt_dlloader;
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typedef void * lt_module;
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typedef void * lt_user_data;
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/* Function pointer types for module loader vtable entries: */
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typedef lt_module lt_module_open (lt_user_data data,
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const char *filename);
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typedef int lt_module_close (lt_user_data data,
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lt_module module);
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typedef void * lt_find_sym (lt_user_data data, lt_module module,
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const char *symbolname);
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typedef int lt_dlloader_init (lt_user_data data);
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typedef int lt_dlloader_exit (lt_user_data data);
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/* Default priority is LT_DLLOADER_PREPEND if none is explicitly given. */
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typedef enum {
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LT_DLLOADER_PREPEND = 0, LT_DLLOADER_APPEND
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} lt_dlloader_priority;
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/* This structure defines a module loader, as populated by the get_vtable
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entry point of each loader. */
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typedef struct {
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const char * name;
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const char * sym_prefix;
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lt_module_open * module_open;
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lt_module_close * module_close;
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lt_find_sym * find_sym;
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lt_dlloader_init * dlloader_init;
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lt_dlloader_exit * dlloader_exit;
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lt_user_data dlloader_data;
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lt_dlloader_priority priority;
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} lt_dlvtable;
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LT_SCOPE int lt_dlloader_add (const lt_dlvtable *vtable);
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LT_SCOPE lt_dlloader lt_dlloader_next (const lt_dlloader loader);
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LT_SCOPE const lt_dlvtable *lt_dlloader_remove (const char *name);
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LT_SCOPE const lt_dlvtable *lt_dlloader_find (const char *name);
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LT_SCOPE const lt_dlvtable *lt_dlloader_get (lt_dlloader loader);
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/* Type of a function to get a loader's vtable: */
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typedef const lt_dlvtable *lt_get_vtable (lt_user_data data);
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LT_END_C_DECLS
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#endif /*!defined(LT_DLLOADER_H)*/
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