libcounter/shm_types.h

   1 /*
   2  * SPDX-License-Identifier: LGPL-2.1-only
   3  *
   4  * Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   5  */
   6
   7 #ifndef _LIBCOUNTER_SHM_TYPES_H
   8 #define _LIBCOUNTER_SHM_TYPES_H
   9
  10 #include <stdint.h>
  11 #include <stddef.h>
  12 #include <limits.h>
  13 #include "shm_internal.h"
  14
  15 enum lttng_counter_shm_object_type {
  16         LTTNG_COUNTER_SHM_OBJECT_SHM,
  17         LTTNG_COUNTER_SHM_OBJECT_MEM,
  18 };
  19
  20 struct lttng_counter_shm_object {
  21         enum lttng_counter_shm_object_type type;
  22         size_t index;   /* within the object table */
  23         int shm_fd;     /* shm fd */
  24         char *memory_map;
  25         size_t memory_map_size;
  26         uint64_t allocated_len;
  27         int shm_fd_ownership;
  28 };
  29
  30 struct lttng_counter_shm_object_table {
  31         size_t size;
  32         size_t allocated_len;
  33         struct lttng_counter_shm_object objects[];
  34 };
  35
  36 struct lttng_counter_shm_handle {
  37         struct lttng_counter_shm_object_table *table;
  38 };
  39
  40 #endif /* _LIBCOUNTER_SHM_TYPES_H */