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

#ifndef _LIBRINGBUFFER_SHM_TYPES_H
#define _LIBRINGBUFFER_SHM_TYPES_H

/*
 * libringbuffer/shm_types.h
 *
 * Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; only
 * version 2.1 of the License.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#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
1d498196 MD	1	#ifndef _LIBRINGBUFFER_SHM_TYPES_H
	2	#define _LIBRINGBUFFER_SHM_TYPES_H
	3
	4	/*
	5	* libringbuffer/shm_types.h
	6	*
e92f3e28	7	* Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
1d498196	8	*
e92f3e28 MD	9	* This library is free software; you can redistribute it and/or
	10	* modify it under the terms of the GNU Lesser General Public
	11	* License as published by the Free Software Foundation; only
	12	* version 2.1 of the License.
	13	*
	14	* This library is distributed in the hope that it will be useful,
	15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	17	* Lesser General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU Lesser General Public
	20	* License along with this library; if not, write to the Free Software
	21	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
1d498196 MD	22	*/
	23
	24	#include <stdint.h>
b4051ad8	25	#include <stddef.h>
a9ff648c	26	#include <limits.h>
1d498196 MD	27	#include "shm_internal.h"
	28
	29	struct channel;
	30
74d81a6c MD	31	enum shm_object_type {
	32	SHM_OBJECT_SHM,
	33	SHM_OBJECT_MEM,
	34	};
	35
1d498196	36	struct shm_object {
74d81a6c	37	enum shm_object_type type;
1d498196 MD	38	size_t index; /* within the object table */
	39	int shm_fd; /* shm fd */
	40	int wait_fd[2]; /* fd for wait/wakeup */
	41	char *memory_map;
0cdad3b1 MD	42	size_t memory_map_size;
0cdad3b1 MD	43	uint64_t allocated_len;
5ea386c3	44	int shm_fd_ownership;
1d498196 MD	45	};
	46
	47	struct shm_object_table {
	48	size_t size;
	49	size_t allocated_len;
	50	struct shm_object objects[];
	51	};
	52
38fae1d3	53	struct lttng_ust_shm_handle {
1d498196 MD	54	struct shm_object_table *table;
1d498196 MD	55	DECLARE_SHMP(struct channel, chan);
1d498196 MD	56	};
	57
	58	#endif /* _LIBRINGBUFFER_SHM_TYPES_H */