| 1 | #ifndef _LIBRINGBUFFER_SHM_TYPES_H |
| 2 | #define _LIBRINGBUFFER_SHM_TYPES_H |
| 3 | |
| 4 | /* |
| 5 | * libringbuffer/shm_types.h |
| 6 | * |
| 7 | * Copyright 2011 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 8 | * |
| 9 | * Dual LGPL v2.1/GPL v2 license. |
| 10 | */ |
| 11 | |
| 12 | #include <stdint.h> |
| 13 | #include "shm_internal.h" |
| 14 | |
| 15 | struct channel; |
| 16 | |
| 17 | struct shm_object { |
| 18 | size_t index; /* within the object table */ |
| 19 | int shm_fd; /* shm fd */ |
| 20 | int wait_fd[2]; /* fd for wait/wakeup */ |
| 21 | char *memory_map; |
| 22 | int is_shadow; |
| 23 | size_t memory_map_size; |
| 24 | size_t allocated_len; |
| 25 | }; |
| 26 | |
| 27 | struct shm_object_table { |
| 28 | size_t size; |
| 29 | size_t allocated_len; |
| 30 | struct shm_object objects[]; |
| 31 | }; |
| 32 | |
| 33 | struct lttng_ust_shm_handle { |
| 34 | struct shm_object_table *table; |
| 35 | DECLARE_SHMP(struct channel, chan); |
| 36 | /* |
| 37 | * In the consumer, chan points to a shadow copy, validated upon |
| 38 | * reception. The chan object is overridden in the consumer to |
| 39 | * point to this shadow copy. |
| 40 | */ |
| 41 | struct channel *shadow_chan; |
| 42 | }; |
| 43 | |
| 44 | #endif /* _LIBRINGBUFFER_SHM_TYPES_H */ |