[babeltrace.git] / include / babeltrace / component / component-class.h

#ifndef BABELTRACE_COMPONENT_COMPONENT_CLASS_H
#define BABELTRACE_COMPONENT_COMPONENT_CLASS_H

/*
 * Babeltrace - Component Class Interface.
 *
 * Copyright 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com>
 *
 * 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 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.
 */

#include <babeltrace/component/component.h>

#ifdef __cplusplus
extern "C" {
#endif

struct bt_component_class;

/**
 * Component class type.
 */
enum bt_component_class_type {
	BT_COMPONENT_CLASS_TYPE_UNKNOWN =	-1,

	/** A source component is a notification generator. */
	BT_COMPONENT_CLASS_TYPE_SOURCE =	0,

	/** A sink component handles incoming notifications. */
	BT_COMPONENT_CLASS_TYPE_SINK =		1,

	/** A filter component implements both Source and Sink interfaces. */
	BT_COMPONENT_CLASS_TYPE_FILTER =	2,
};

typedef enum bt_component_status (*bt_component_class_init_method)(
		struct bt_component *component, struct bt_value *params);

typedef void (*bt_component_class_destroy_method)(struct bt_component *component);

extern int bt_component_class_set_init_method(
		struct bt_component_class *component_class,
		bt_component_class_init_method init_method);

extern int bt_component_class_set_destroy_method(
		struct bt_component_class *component_class,
		bt_component_class_destroy_method destroy_method);

extern int bt_component_class_set_description(
		struct bt_component_class *component_class,
		const char *description);

/**
 * Get a component class' name.
 *
 * @param component_class	Component class of which to get the name
 * @returns			Name of the component class
 */
extern const char *bt_component_class_get_name(
		struct bt_component_class *component_class);

/**
 * Get a component class' description.
 *
 * Component classes may provide an optional description. It may, however,
 * opt not to.
 *
 * @param component_class	Component class of which to get the description
 * @returns			Description of the component class, or NULL.
 */
extern const char *bt_component_class_get_description(
		struct bt_component_class *component_class);

/**
 * Get a component class' type.
 *
 * @param component_class	Component class of which to get the type
 * @returns			One of #bt_component_type
 */
extern enum bt_component_class_type bt_component_class_get_type(
		struct bt_component_class *component_class);

#ifdef __cplusplus
}
#endif

#endif /* BABELTRACE_COMPONENT_COMPONENT_CLASS_H */
Commit	Line	Data
33b34c43 PP	1	#ifndef BABELTRACE_COMPONENT_COMPONENT_CLASS_H
33b34c43 PP	2	#define BABELTRACE_COMPONENT_COMPONENT_CLASS_H
fc11e32c JG	3
	4	/*
	5	* Babeltrace - Component Class Interface.
	6	*
	7	* Copyright 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com>
	8	*
	9	* Permission is hereby granted, free of charge, to any person obtaining a copy
	10	* of this software and associated documentation files (the "Software"), to deal
	11	* in the Software without restriction, including without limitation the rights
	12	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	13	* copies of the Software, and to permit persons to whom the Software is
	14	* furnished to do so, subject to the following conditions:
	15	*
	16	* The above copyright notice and this permission notice shall be included in
	17	* all copies or substantial portions of the Software.
	18	*
	19	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	20	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	21	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	22	* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	23	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	24	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	25	* SOFTWARE.
	26	*/
	27
33b34c43 PP	28	#include <babeltrace/component/component.h>
33b34c43 PP	29
fc11e32c JG	30	#ifdef __cplusplus
	31	extern "C" {
	32	#endif
	33
fc11e32c JG	34	struct bt_component_class;
fc11e32c JG	35
d3e4dcd8 PP	36	/**
	37	* Component class type.
	38	*/
	39	enum bt_component_class_type {
	40	BT_COMPONENT_CLASS_TYPE_UNKNOWN = -1,
	41
	42	/** A source component is a notification generator. */
	43	BT_COMPONENT_CLASS_TYPE_SOURCE = 0,
	44
	45	/** A sink component handles incoming notifications. */
	46	BT_COMPONENT_CLASS_TYPE_SINK = 1,
	47
	48	/** A filter component implements both Source and Sink interfaces. */
	49	BT_COMPONENT_CLASS_TYPE_FILTER = 2,
	50	};
	51
	52	typedef enum bt_component_status (*bt_component_class_init_method)(
	53	struct bt_component component, struct bt_value params);
	54
	55	typedef void (bt_component_class_destroy_method)(struct bt_component component);
	56
	57	extern int bt_component_class_set_init_method(
	58	struct bt_component_class *component_class,
	59	bt_component_class_init_method init_method);
	60
	61	extern int bt_component_class_set_destroy_method(
	62	struct bt_component_class *component_class,
	63	bt_component_class_destroy_method destroy_method);
	64
	65	extern int bt_component_class_set_description(
	66	struct bt_component_class *component_class,
	67	const char *description);
38b48196 JG	68
	69	/**
	70	* Get a component class' name.
	71	*
	72	* @param component_class Component class of which to get the name
	73	* @returns Name of the component class
	74	*/
	75	extern const char *bt_component_class_get_name(
	76	struct bt_component_class *component_class);
	77
7c7c0433 JG	78	/**
	79	* Get a component class' description.
	80	*
	81	* Component classes may provide an optional description. It may, however,
	82	* opt not to.
	83	*
	84	* @param component_class Component class of which to get the description
	85	* @returns Description of the component class, or NULL.
	86	*/
f3bc2010	87	extern const char *bt_component_class_get_description(
7c7c0433 JG	88	struct bt_component_class *component_class);
7c7c0433 JG	89
38b48196 JG	90	/**
	91	* Get a component class' type.
	92	*
	93	* @param component_class Component class of which to get the type
	94	* @returns One of #bt_component_type
	95	*/
d3e4dcd8	96	extern enum bt_component_class_type bt_component_class_get_type(
fc11e32c JG	97	struct bt_component_class *component_class);
fc11e32c JG	98
d3e4dcd8 PP	99	#ifdef __cplusplus
	100	}
	101	#endif
	102
33b34c43	103	#endif /* BABELTRACE_COMPONENT_COMPONENT_CLASS_H */