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/*
* peas-plugin-loader-c.c
* This file is part of libpeas
*
* Copyright (C) 2008 - Jesse van den Kieboom
*
* libpeas is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* libpeas is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*/
#include "config.h"
#include <string.h>
#include "peas-plugin-loader-c.h"
#include "peas-extension-base.h"
#include "peas-object-module.h"
#include "peas-plugin-info-priv.h"
struct _PeasPluginLoaderC {
PeasPluginLoader parent_instance;
GMutex lock;
GHashTable *loaded_plugins;
};
G_DEFINE_FINAL_TYPE (PeasPluginLoaderC, peas_plugin_loader_c, PEAS_TYPE_PLUGIN_LOADER)
static GQuark quark_extension_type = 0;
static const char *intern_plugin_info = NULL;
static gboolean
peas_plugin_loader_c_load (PeasPluginLoader *loader,
PeasPluginInfo *info)
{
PeasPluginLoaderC *cloader = PEAS_PLUGIN_LOADER_C (loader);
g_mutex_lock (&cloader->lock);
if (!g_hash_table_lookup_extended (cloader->loaded_plugins,
info->filename,
NULL, (gpointer *) &info->loader_data))
{
const char *module_name, *module_dir;
module_name = peas_plugin_info_get_module_name (info);
module_dir = peas_plugin_info_get_module_dir (info);
if (info->embedded != NULL)
{
info->loader_data = peas_object_module_new_embedded (module_name,
info->embedded);
}
else
{
/* Force all C modules to be resident in case they
* use libraries that do not deal well with reloading.
* Furthermore, we use local linkage to improve module isolation.
*/
info->loader_data = peas_object_module_new_full (module_name,
module_dir,
TRUE, TRUE);
}
if (!g_type_module_use (G_TYPE_MODULE (info->loader_data)))
g_clear_object (&info->loader_data);
g_hash_table_insert (cloader->loaded_plugins,
g_strdup (info->filename), info->loader_data);
}
g_mutex_unlock (&cloader->lock);
return info->loader_data != NULL;
}
static void
peas_plugin_loader_c_unload (PeasPluginLoader *loader,
PeasPluginInfo *info)
{
/* Don't bother unloading the plugin's
* GTypeModule as it is always resident
*/
info->loader_data = NULL;
}
static gboolean
peas_plugin_loader_c_provides_extension (PeasPluginLoader *loader,
PeasPluginInfo *info,
GType exten_type)
{
return peas_object_module_provides_object (info->loader_data, exten_type);
}
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
static GObject *
peas_plugin_loader_c_create_extension (PeasPluginLoader *loader,
PeasPluginInfo *info,
GType exten_type,
guint n_parameters,
GParameter *parameters)
{
GParameter *exten_parameters;
gpointer instance;
/* We want to add a "plugin-info" property so we can pass it to
* the extension if it inherits from PeasExtensionBase. No need to
* actually "duplicate" the GValues, a memcpy is sufficient as the
* source GValues are longer lived than our local copy.
*/
exten_parameters = g_newa (GParameter, n_parameters + 1);
memcpy (exten_parameters, parameters, sizeof (GParameter) * n_parameters);
/* Initialize our additional property.
* If the instance does not have a plugin-info property
* then PeasObjectModule will remove the property.
*/
exten_parameters[n_parameters].name = intern_plugin_info;
memset (&exten_parameters[n_parameters].value, 0, sizeof (GValue));
g_value_init (&exten_parameters[n_parameters].value, PEAS_TYPE_PLUGIN_INFO);
g_value_set_object (&exten_parameters[n_parameters].value, info);
instance = peas_object_module_create_object (info->loader_data,
exten_type,
n_parameters + 1,
exten_parameters);
g_value_unset (&exten_parameters[n_parameters].value);
if (instance == NULL)
return NULL;
g_return_val_if_fail (G_IS_OBJECT (instance), NULL);
g_return_val_if_fail (G_TYPE_CHECK_INSTANCE_TYPE (instance, exten_type), NULL);
/* We have to remember which interface we are instantiating
* for the deprecated peas_extension_get_extension_type().
*/
g_object_set_qdata (instance, quark_extension_type,
GSIZE_TO_POINTER (exten_type));
return instance;
}
G_GNUC_END_IGNORE_DEPRECATIONS
static void
peas_plugin_loader_c_init (PeasPluginLoaderC *cloader)
{
g_mutex_init (&cloader->lock);
/* loaded_plugins maps PeasPluginInfo:filename to a PeasObjectModule */
cloader->loaded_plugins = g_hash_table_new_full (g_str_hash, g_str_equal,
g_free, NULL);
}
static void
peas_plugin_loader_c_finalize (GObject *object)
{
PeasPluginLoaderC *cloader = PEAS_PLUGIN_LOADER_C (object);
g_mutex_clear (&cloader->lock);
g_hash_table_destroy (cloader->loaded_plugins);
G_OBJECT_CLASS (peas_plugin_loader_c_parent_class)->finalize (object);
}
static void
peas_plugin_loader_c_class_init (PeasPluginLoaderCClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
PeasPluginLoaderClass *loader_class = PEAS_PLUGIN_LOADER_CLASS (klass);
quark_extension_type = g_quark_from_static_string ("peas-extension-type");
intern_plugin_info = g_intern_static_string ("plugin-info");
object_class->finalize = peas_plugin_loader_c_finalize;
loader_class->load = peas_plugin_loader_c_load;
loader_class->unload = peas_plugin_loader_c_unload;
loader_class->provides_extension = peas_plugin_loader_c_provides_extension;
loader_class->create_extension = peas_plugin_loader_c_create_extension;
}
/*
* peas_plugin_loader_c_new:
*
* Return a new instance of #PeasPluginLoaderC.
*
* Returns: a new instance of #PeasPluginLoaderC.
*/
PeasPluginLoader *
peas_plugin_loader_c_new (void)
{
return PEAS_PLUGIN_LOADER (g_object_new (PEAS_TYPE_PLUGIN_LOADER_C, NULL));
}
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