include/urcu/flavor.h

   1 // SPDX-FileCopyrightText: 2011 Lai Jiangshan <laijs@cn.fujitsu.com>
   2 //
   3 // SPDX-License-Identifier: LGPL-2.1-or-later
   4
   5 #ifndef _URCU_FLAVOR_H
   6 #define _URCU_FLAVOR_H
   7
   8 /*
   9  * Userspace RCU header - rcu flavor declarations
  10  */
  11
  12 #include <urcu/urcu-poll.h>
  13
  14 #ifdef __cplusplus
  15 extern "C" {
  16 #endif
  17
  18 struct rcu_head;
  19
  20 struct urcu_atfork {
  21         void (*before_fork)(void *priv);
  22         void (*after_fork_parent)(void *priv);
  23         void (*after_fork_child)(void *priv);
  24         void *priv;
  25 };
  26
  27 void urcu_register_rculfhash_atfork(struct urcu_atfork *atfork);
  28 void urcu_unregister_rculfhash_atfork(struct urcu_atfork *atfork);
  29
  30 struct rcu_flavor_struct {
  31         void (*read_lock)(void);
  32         void (*read_unlock)(void);
  33         int (*read_ongoing)(void);
  34         void (*read_quiescent_state)(void);
  35         void (*update_call_rcu)(struct rcu_head *head,
  36                                 void (*func)(struct rcu_head *head));
  37         void (*update_synchronize_rcu)(void);
  38         void (*update_defer_rcu)(void (*fct)(void *p), void *p);
  39
  40         void (*thread_offline)(void);
  41         void (*thread_online)(void);
  42         void (*register_thread)(void);
  43         void (*unregister_thread)(void);
  44
  45         void (*barrier)(void);
  46
  47         void (*register_rculfhash_atfork)(struct urcu_atfork *atfork);
  48         void (*unregister_rculfhash_atfork)(struct urcu_atfork *atfork);
  49
  50         struct urcu_gp_poll_state (*update_start_poll_synchronize_rcu)(void);
  51         bool (*update_poll_state_synchronize_rcu)(struct urcu_gp_poll_state state);
  52 };
  53
  54 #define DEFINE_RCU_FLAVOR(x)                            \
  55 const struct rcu_flavor_struct x = {                    \
  56         .read_lock              = rcu_read_lock,        \
  57         .read_unlock            = rcu_read_unlock,      \
  58         .read_ongoing           = rcu_read_ongoing,     \
  59         .read_quiescent_state   = rcu_quiescent_state,  \
  60         .update_call_rcu        = call_rcu,             \
  61         .update_synchronize_rcu = synchronize_rcu,      \
  62         .update_defer_rcu       = defer_rcu,            \
  63         .thread_offline         = rcu_thread_offline,   \
  64         .thread_online          = rcu_thread_online,    \
  65         .register_thread        = rcu_register_thread,  \
  66         .unregister_thread      = rcu_unregister_thread,\
  67         .barrier                = rcu_barrier,          \
  68         .register_rculfhash_atfork = urcu_register_rculfhash_atfork,    \
  69         .unregister_rculfhash_atfork = urcu_unregister_rculfhash_atfork,\
  70         .update_start_poll_synchronize_rcu = start_poll_synchronize_rcu,\
  71         .update_poll_state_synchronize_rcu = poll_state_synchronize_rcu,\
  72 }
  73
  74 extern const struct rcu_flavor_struct rcu_flavor;
  75
  76 #ifdef __cplusplus
  77 }
  78 #endif
  79
  80 #endif /* _URCU_FLAVOR_H */