[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 "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	*
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>
	25	#include "shm_internal.h"
	26
	27	struct channel;
	28
	29	struct shm_object {
	30	size_t index; /* within the object table */
	31	int shm_fd; /* shm fd */
	32	int wait_fd[2]; /* fd for wait/wakeup */
	33	char *memory_map;
7a784989	34	int is_shadow;
0cdad3b1 MD	35	size_t memory_map_size;
0cdad3b1 MD	36	uint64_t allocated_len;
1d498196 MD	37	};
	38
	39	struct shm_object_table {
	40	size_t size;
	41	size_t allocated_len;
	42	struct shm_object objects[];
	43	};
	44
38fae1d3	45	struct lttng_ust_shm_handle {
1d498196 MD	46	struct shm_object_table *table;
	47	DECLARE_SHMP(struct channel, chan);
	48	/*
	49	* In the consumer, chan points to a shadow copy, validated upon
	50	* reception. The chan object is overridden in the consumer to
	51	* point to this shadow copy.
	52	*/
	53	struct channel *shadow_chan;
	54	};
	55
	56	#endif /* _LIBRINGBUFFER_SHM_TYPES_H */