1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/plugin.c	Sat Jun 13 00:50:48 2009 +0000
     1.3 @@ -0,0 +1,95 @@
     1.4 +/**
     1.5 + * $Id$
     1.6 + *
     1.7 + * Plugin loader code
     1.8 + *
     1.9 + * Copyright (c) 2009 Nathan Keynes.
    1.10 + *
    1.11 + * This program is free software; you can redistribute it and/or modify
    1.12 + * it under the terms of the GNU General Public License as published by
    1.13 + * the Free Software Foundation; either version 2 of the License, or
    1.14 + * (at your option) any later version.
    1.15 + *
    1.16 + * This program is distributed in the hope that it will be useful,
    1.17 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
    1.18 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    1.19 + * GNU General Public License for more details.
    1.20 + */
    1.21 +
    1.22 +#include <dirent.h>
    1.23 +#include <dlfcn.h>
    1.24 +#include <string.h>
    1.25 +#include <glib/gmem.h>
    1.26 +#include <glib/gstrfuncs.h>
    1.27 +#include "plugin.h"
    1.28 +
    1.29 +
    1.30 +#ifdef APPLE_BUILD
    1.31 +#define SOEXT ".dylib"
    1.32 +#else
    1.33 +#define SOEXT ".so"
    1.34 +#endif
    1.35 +
    1.36 +const char *plugin_type_string[] = { "Undefined", "Audio driver", "Input driver" };
    1.37 +
    1.38 +gboolean plugin_load( const gchar *plugin_path )
    1.39 +{
    1.40 +    void *so = dlopen(plugin_path, RTLD_NOW|RTLD_LOCAL);
    1.41 +    if( so == NULL ) {
    1.42 +        WARN("Failed to load plugin '%s': %s", plugin_path, dlerror());
    1.43 +        return FALSE;
    1.44 +    }
    1.45 +    
    1.46 +    struct plugin_struct *plugin = (struct plugin_struct *)dlsym(so,"lxdream_plugin_entry");
    1.47 +    if( plugin == NULL ) {
    1.48 +        WARN("Failed to load plugin: '%s': Not an lxdream plugin", plugin_path);
    1.49 +        dlclose(so);
    1.50 +        return FALSE;
    1.51 +    }
    1.52 +
    1.53 +    if( strcmp(lxdream_short_version, plugin->version) != 0 ) {
    1.54 +        WARN("Failed to load plugin: '%s': Incompatible version (%s)", plugin_path, plugin->version);
    1.55 +        dlclose(so);
    1.56 +        return FALSE;
    1.57 +    }
    1.58 +
    1.59 +    if( plugin->type < PLUGIN_MIN_TYPE || plugin->type > PLUGIN_MAX_TYPE ) {
    1.60 +        WARN("Failed to load plugin: '%s': Unrecognized plugin type (%d)", plugin_path, plugin->type );
    1.61 +        dlclose(so);
    1.62 +        return FALSE;
    1.63 +    }
    1.64 +
    1.65 +    if( plugin->register_plugin() == FALSE ) {
    1.66 +        WARN("Failed to load plugin: '%s': Initialization failed", plugin_path);
    1.67 +        dlclose(so);
    1.68 +        return FALSE;
    1.69 +    }
    1.70 +    INFO("Loaded %s plugin '%s'", plugin_type_string[plugin->type], plugin->name);
    1.71 +    return TRUE;
    1.72 +}
    1.73 +
    1.74 +/**
    1.75 + * Scan the plugin dir and load all valid plugins.
    1.76 + */
    1.77 +int plugin_init( const gchar *plugin_dir )
    1.78 +{
    1.79 +    int plugin_count;
    1.80 +    struct dirent *ent;
    1.81 +    DIR *dir = opendir(plugin_dir);
    1.82 +    if( dir == NULL ) {
    1.83 +        WARN( "Unable to open plugin directory '%s'", plugin_dir );
    1.84 +        return 0;
    1.85 +    }
    1.86 +    
    1.87 +    while( (ent = readdir(dir)) != NULL ) {
    1.88 +        const char *ext = strrchr(ent->d_name, '.');
    1.89 +        if( ext != NULL && strcasecmp(SOEXT,ext) == 0 ) {
    1.90 +            char *libname = g_strdup_printf( "%s/%s", plugin_dir,ent->d_name );
    1.91 +            if( plugin_load( libname ) ) {
    1.92 +                plugin_count++;
    1.93 +            }
    1.94 +            g_free(libname);
    1.95 +        }
    1.96 +    }
    1.97 +    return plugin_count;
    1.98 +}