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

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

#ifndef _LIBRINGBUFFER_SHM_INTERNAL_H
#define _LIBRINGBUFFER_SHM_INTERNAL_H

struct shm_ref {
	volatile ssize_t index;		/* within the object table */
	volatile ssize_t offset;	/* within the object */
};

#define DECLARE_SHMP(type, name)	\
	union {				\
		struct shm_ref _ref;	\
		type *_type;		\
	} name

#endif /* _LIBRINGBUFFER_SHM_INTERNAL_H */
Commit	Line	Data
1d498196	1	/*
c0c0989a	2	* SPDX-License-Identifier: LGPL-2.1-only
1d498196	3	*
e92f3e28	4	* Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
1d498196 MD	5	*/
1d498196 MD	6
c0c0989a MJ	7	#ifndef _LIBRINGBUFFER_SHM_INTERNAL_H
	8	#define _LIBRINGBUFFER_SHM_INTERNAL_H
	9
1d498196 MD	10	struct shm_ref {
	11	volatile ssize_t index; /* within the object table */
	12	volatile ssize_t offset; /* within the object */
	13	};
	14
	15	#define DECLARE_SHMP(type, name) \
	16	union { \
	17	struct shm_ref _ref; \
	18	type *_type; \
	19	} name
	20
	21	#endif /* _LIBRINGBUFFER_SHM_INTERNAL_H */