[lttng-ust.git] / libringbuffer / shm_types.h

#ifndef _LIBRINGBUFFER_SHM_TYPES_H
#define _LIBRINGBUFFER_SHM_TYPES_H

/*
 * libringbuffer/shm_types.h
 *
 * Copyright 2011 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 *
 * Dual LGPL v2.1/GPL v2 license.
 */

#include <stdint.h>
#include "shm_internal.h"

struct channel;

struct shm_object {
	size_t index;	/* within the object table */
	int shm_fd;	/* shm fd */
	int wait_fd[2];	/* fd for wait/wakeup */
	char *memory_map;
	int is_shadow;
	size_t memory_map_size;
	uint64_t allocated_len;
};

struct shm_object_table {
	size_t size;
	size_t allocated_len;
	struct shm_object objects[];
};

struct lttng_ust_shm_handle {
	struct shm_object_table *table;
	DECLARE_SHMP(struct channel, chan);
	/*
	 * In the consumer, chan points to a shadow copy, validated upon
	 * reception. The chan object is overridden in the consumer to
	 * point to this shadow copy.
	 */
	struct channel *shadow_chan;
};

#endif /* _LIBRINGBUFFER_SHM_TYPES_H */
Commit	Line	Data
1d498196 MD	1	#ifndef _LIBRINGBUFFER_SHM_TYPES_H
	2	#define _LIBRINGBUFFER_SHM_TYPES_H
	3
	4	/*
	5	* libringbuffer/shm_types.h
	6	*
	7	* Copyright 2011 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	8	*
	9	* Dual LGPL v2.1/GPL v2 license.
	10	*/
	11
	12	#include <stdint.h>
	13	#include "shm_internal.h"
	14
	15	struct channel;
	16
	17	struct shm_object {
	18	size_t index; /* within the object table */
	19	int shm_fd; /* shm fd */
	20	int wait_fd[2]; /* fd for wait/wakeup */
	21	char *memory_map;
7a784989	22	int is_shadow;
0cdad3b1 MD	23	size_t memory_map_size;
0cdad3b1 MD	24	uint64_t allocated_len;
1d498196 MD	25	};
	26
	27	struct shm_object_table {
	28	size_t size;
	29	size_t allocated_len;
	30	struct shm_object objects[];
	31	};
	32
38fae1d3	33	struct lttng_ust_shm_handle {
1d498196 MD	34	struct shm_object_table *table;
	35	DECLARE_SHMP(struct channel, chan);
	36	/*
	37	* In the consumer, chan points to a shadow copy, validated upon
	38	* reception. The chan object is overridden in the consumer to
	39	* point to this shadow copy.
	40	*/
	41	struct channel *shadow_chan;
	42	};
	43
	44	#endif /* _LIBRINGBUFFER_SHM_TYPES_H */