kern/include/ros/bcq_struct.h

   1 /* Copyright (c) 2010 The Regents of the University of California
   2  * Barret Rhoden <brho@cs.berkeley.edu>
   3  * See LICENSE for details.
   4  *
   5  * Struct for the BCQ.  Needs to be in its own file so glibc doesn't try to
   6  * include any of the atomics needed for the actual BCQ operations.  */
   7
   8 #pragma once
   9
  10 #include <ros/common.h>
  11
  12 struct bcq_header {
  13         uint32_t prod_idx;      /* next to be produced in */
  14         uint32_t cons_pub_idx;  /* last completely consumed */
  15         uint32_t cons_pvt_idx;  /* last a consumer has dibs on */
  16 };
  17
  18 #define DEFINE_BCQ_TYPES(__name, __elem_t, __num_elems)                        \
  19                                                                                \
  20 /* Wrapper, per element, with the consumption bool */                          \
  21 struct __name##_bcq_wrap {                                                     \
  22         __elem_t elem;                                                         \
  23         bool rdy_for_cons;      /* elem is ready for consumption */            \
  24 };                                                                             \
  25                                                                                \
  26 /* The actual BC queue */                                                      \
  27 struct __name##_bcq {                                                          \
  28         struct bcq_header hdr;                                                 \
  29         struct __name##_bcq_wrap wraps[__num_elems];                           \
  30 };