/* Simple Plugin API
 *
 * Copyright © 2021 Wim Taymans
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */

#ifndef SPA_PLUGIN_LOADER_H
#define SPA_PLUGIN_LOADER_H

#ifdef __cplusplus
extern "C" {
#endif

#include <spa/utils/hook.h>
#include <spa/utils/dict.h>

/** \defgroup spa_plugin_loader Plugin Loader
 * SPA plugin loader
 */

/**
 * \addtogroup spa_plugin_loader
 * \{
 */

#define SPA_TYPE_INTERFACE_PluginLoader	SPA_TYPE_INFO_INTERFACE_BASE "PluginLoader"

#define SPA_VERSION_PLUGIN_LOADER		0
struct spa_plugin_loader { struct spa_interface iface; };

struct spa_plugin_loader_methods {
#define SPA_VERSION_PLUGIN_LOADER_METHODS	0
        uint32_t version;

	/**
	 * Load a SPA plugin.
         *
         * \param factory_name Plugin factory name
         * \param info Info dictionary for plugin. NULL if none.
         * \return plugin handle, or NULL on error
	 */
	struct spa_handle *(*load) (void *object, const char *factory_name, const struct spa_dict *info);

	/**
	 * Unload a SPA plugin.
         *
         * \param handle Plugin handle.
         * \return 0 on success, < 0 on error
	 */
	int (*unload)(void *object, struct spa_handle *handle);
};

static inline struct spa_handle *
spa_plugin_loader_load(struct spa_plugin_loader *loader, const char *factory_name, const struct spa_dict *info)
{
	struct spa_handle *res = NULL;
	if (SPA_LIKELY(loader != NULL))
		spa_interface_call_res(&loader->iface,
				struct spa_plugin_loader_methods, res,
				load, 0, factory_name, info);
	return res;
}

static inline int
spa_plugin_loader_unload(struct spa_plugin_loader *loader, struct spa_handle *handle)
{
	int res = -1;
	if (SPA_LIKELY(loader != NULL))
		spa_interface_call_res(&loader->iface,
				struct spa_plugin_loader_methods, res,
				unload, 0, handle);
	return res;
}

/**
 * \}
 */

#ifdef __cplusplus
}  /* extern "C" */
#endif

#endif /* SPA_PLUGIN_LOADER_H */