| 1 | #ifndef _LIBRINGBUFFER_SHM_INTERNAL_H |
| 2 | #define _LIBRINGBUFFER_SHM_INTERNAL_H |
| 3 | |
| 4 | /* |
| 5 | * libringbuffer/shm_internal.h |
| 6 | * |
| 7 | * Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 8 | * |
| 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 |
| 22 | */ |
| 23 | |
| 24 | struct shm_ref { |
| 25 | volatile ssize_t index; /* within the object table */ |
| 26 | volatile ssize_t offset; /* within the object */ |
| 27 | }; |
| 28 | |
| 29 | #define DECLARE_SHMP(type, name) \ |
| 30 | union { \ |
| 31 | struct shm_ref _ref; \ |
| 32 | type *_type; \ |
| 33 | } name |
| 34 | |
| 35 | #endif /* _LIBRINGBUFFER_SHM_INTERNAL_H */ |