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      1 // SPDX-FileCopyrightText: 2011 Lai Jiangshan <laijs (at) 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 */
     81