glib/gmodule/gmodule.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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/* GMODULE - GLIB wrapper code for dynamic module loading
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 * Copyright (C) 1998 Tim Janik
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 * Portions copyright (c) 2006-2009 Nokia Corporation.  All rights reserved.
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 *
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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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 *
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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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 *
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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
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 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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 * Boston, MA 02111-1307, USA.
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 */
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/*
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 * Modified by the GLib Team and others 1997-2000.  See the AUTHORS
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 * file for a list of people on the GLib Team.  See the ChangeLog
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 * files for a list of changes.  These files are distributed with
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 * GLib at ftp://ftp.gtk.org/pub/gtk/. 
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 */
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#ifndef __GMODULE_H__
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#define __GMODULE_H__
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#include <glib.h>
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G_BEGIN_DECLS
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/* exporting and importing functions, this is special cased
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 * to feature Windows dll stubs.
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 */
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#define	G_MODULE_IMPORT		extern
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#ifdef G_PLATFORM_WIN32
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#  define	G_MODULE_EXPORT		__declspec(dllexport)
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#else /* !G_PLATFORM_WIN32 */
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#  define	G_MODULE_EXPORT
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#endif /* !G_PLATFORM_WIN32 */
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typedef enum
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{
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  G_MODULE_BIND_LAZY	= 1 << 0,
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  G_MODULE_BIND_LOCAL	= 1 << 1,
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  G_MODULE_BIND_MASK	= 0x03
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} GModuleFlags;
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typedef	struct _GModule			 GModule;
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typedef const gchar* (*GModuleCheckInit) (GModule	*module);
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typedef void	     (*GModuleUnload)	 (GModule	*module);
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#ifdef G_OS_WIN32
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#define g_module_open g_module_open_utf8
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#define g_module_name g_module_name_utf8
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#endif
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/* return TRUE if dynamic module loading is supported */
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IMPORT_C gboolean	g_module_supported	   (void) G_GNUC_CONST;
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/* open a module `file_name' and return handle, which is NULL on error */
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IMPORT_C GModule*              g_module_open          (const gchar  *file_name,
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					      GModuleFlags  flags);
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/* close a previously opened module, returns TRUE on success */
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IMPORT_C gboolean              g_module_close         (GModule      *module);
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/* make a module resident so g_module_close on it will be ignored */
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IMPORT_C void                  g_module_make_resident (GModule      *module);
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/* query the last module error as a string */
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IMPORT_C G_CONST_RETURN gchar* g_module_error         (void);
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/* retrieve a symbol pointer from `module', returns TRUE on success */
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IMPORT_C gboolean              g_module_symbol        (GModule      *module,
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					      const gchar  *symbol_name,
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					      gpointer     *symbol);
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/* retrieve the file name from an existing module */
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IMPORT_C G_CONST_RETURN gchar* g_module_name          (GModule      *module);
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/* Build the actual file name containing a module. `directory' is the
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 * directory where the module file is supposed to be, or NULL or empty
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 * in which case it should either be in the current directory or, on
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 * some operating systems, in some standard place, for instance on the
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 * PATH. Hence, to be absoultely sure to get the correct module,
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 * always pass in a directory. The file name consists of the directory,
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 * if supplied, and `module_name' suitably decorated accoring to
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 * the operating system's conventions (for instance lib*.so or *.dll).
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 *
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 * No checks are made that the file exists, or is of correct type.
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 */
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IMPORT_C gchar*                g_module_build_path    (const gchar  *directory,
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					      const gchar  *module_name);
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G_END_DECLS
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#endif /* __GMODULE_H__ */