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

/*
 * SPDX-License-Identifier: LGPL-2.1-only
 *
 * Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 */

#ifndef _LIBRINGBUFFER_SHM_TYPES_H
#define _LIBRINGBUFFER_SHM_TYPES_H

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

struct channel;

enum shm_object_type {
	SHM_OBJECT_SHM,
	SHM_OBJECT_MEM,
};

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

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);
};

#endif /* _LIBRINGBUFFER_SHM_TYPES_H */
Commit	Line	Data
	1	/*
	2	* SPDX-License-Identifier: LGPL-2.1-only
	3	*
	4	* Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	5	*/
	6
	7	#ifndef _LIBRINGBUFFER_SHM_TYPES_H
	8	#define _LIBRINGBUFFER_SHM_TYPES_H
	9
	10	#include <stdint.h>
	11	#include <stddef.h>
	12	#include <limits.h>
	13	#include "shm_internal.h"
	14
	15	struct channel;
	16
	17	enum shm_object_type {
	18	SHM_OBJECT_SHM,
	19	SHM_OBJECT_MEM,
	20	};
	21
	22	struct shm_object {
	23	enum shm_object_type type;
	24	size_t index; /* within the object table */
	25	int shm_fd; /* shm fd */
	26	int wait_fd[2]; /* fd for wait/wakeup */
	27	char *memory_map;
	28	size_t memory_map_size;
	29	uint64_t allocated_len;
	30	int shm_fd_ownership;
	31	};
	32
	33	struct shm_object_table {
	34	size_t size;
	35	size_t allocated_len;
	36	struct shm_object objects[];
	37	};
	38
	39	struct lttng_ust_shm_handle {
	40	struct shm_object_table *table;
	41	DECLARE_SHMP(struct channel, chan);
	42	};
	43
	44	#endif /* _LIBRINGBUFFER_SHM_TYPES_H */