[lttng-modules.git] / ltt-events.h

/*
 * ltt-events.h
 *
 * Copyright 2010 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 *
 * Holds LTTng per-session event registry.
 */

#include <linux/list.h>

struct ltt_channel;
struct ltt_session;

/*
 * ltt_event structure is referred to by the tracing fast path. It must be
 * kept small.
 */
struct ltt_event {
	unsigned int id;
	struct ltt_channel *chan;
	void *filter;
	char *name;
	struct list_head list;		/* Event list */
};

struct ltt_channel {
	struct channel *chan;		/* Channel buffers */
	/* Event ID management */
	struct ltt_session *session;
	unsigned int free_event_id;	/* Next event ID to allocate */
	struct list_head list;		/* Channel list */
	char name[PATH_MAX];
};

struct ltt_session {
	int active;			/* Is trace session active ? */
	struct list_head chan;		/* Channel list head */
	struct list_head events;	/* Event list head */
	struct list_head list;		/* Session list */
	char name[PATH_MAX];
};

struct ltt_session *ltt_session_create(char *name);
int ltt_session_destroy(struct ltt_session *session);

struct ltt_channel *ltt_channel_create(struct ltt_session *session, char *name,
				       int overwrite, void *buf_addr,
				       size_t subbuf_size, size_t num_subbuf,
				       unsigned int switch_timer_interval,
				       unsigned int read_timer_interval);
int _ltt_channel_destroy(struct ltt_channel *chan);

struct ltt_event *ltt_event_create(struct ltt_channel *chan, char *name,
				   void *filter);
int _ltt_event_destroy(struct ltt_event *event);
Commit	Line	Data
4e3c1b9b MD	1	/*
	2	* ltt-events.h
	3	*
	4	* Copyright 2010 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	5	*
	6	* Holds LTTng per-session event registry.
	7	*/
	8
	9	#include <linux/list.h>
	10
	11	struct ltt_channel;
	12	struct ltt_session;
	13
	14	/*
	15	* ltt_event structure is referred to by the tracing fast path. It must be
	16	* kept small.
	17	*/
	18	struct ltt_event {
	19	unsigned int id;
	20	struct ltt_channel *chan;
	21	void *filter;
	22	char *name;
	23	struct list_head list; /* Event list */
	24	};
	25
	26	struct ltt_channel {
	27	struct channel chan; / Channel buffers */
	28	/* Event ID management */
	29	struct ltt_session *session;
e5382b6d	30	unsigned int free_event_id; /* Next event ID to allocate */
4e3c1b9b MD	31	struct list_head list; /* Channel list */
	32	char name[PATH_MAX];
	33	};
	34
	35	struct ltt_session {
e5382b6d	36	int active; /* Is trace session active ? */
4e3c1b9b MD	37	struct list_head chan; /* Channel list head */
	38	struct list_head events; /* Event list head */
	39	struct list_head list; /* Session list */
	40	char name[PATH_MAX];
	41	};
	42
	43	struct ltt_session ltt_session_create(char name);
	44	int ltt_session_destroy(struct ltt_session *session);
	45
	46	struct ltt_channel ltt_channel_create(struct ltt_session session, char *name,
	47	int overwrite, void *buf_addr,
	48	size_t subbuf_size, size_t num_subbuf,
	49	unsigned int switch_timer_interval,
	50	unsigned int read_timer_interval);
	51	int _ltt_channel_destroy(struct ltt_channel *chan);
	52
	53	struct ltt_event ltt_event_create(struct ltt_channel chan, char *name,
	54	void *filter);
	55	int _ltt_event_destroy(struct ltt_event *event);