[urcu.git] / urcu-call-rcu.h

#ifndef _URCU_CALL_RCU_H
#define _URCU_CALL_RCU_H

/*
 * urcu-call-rcu.h
 *
 * Userspace RCU header - deferred execution
 *
 * Copyright (c) 2009 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 * Copyright (c) 2009 Paul E. McKenney, IBM Corporation.
 *
 * LGPL-compatible code should include this header with :
 *
 * #define _LGPL_SOURCE
 * #include <urcu-defer.h>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include <stdlib.h>
#include <pthread.h>

#include <urcu/wfcqueue.h>

#ifdef __cplusplus
extern "C" {
#endif

/* Note that struct call_rcu_data is opaque to callers. */

struct call_rcu_data;

/* Flag values. */

#define URCU_CALL_RCU_RT	(1U << 0)
#define URCU_CALL_RCU_RUNNING	(1U << 1)
#define URCU_CALL_RCU_STOP	(1U << 2)
#define URCU_CALL_RCU_STOPPED	(1U << 3)
#define URCU_CALL_RCU_PAUSE	(1U << 4)
#define URCU_CALL_RCU_PAUSED	(1U << 5)

/*
 * The rcu_head data structure is placed in the structure to be freed
 * via call_rcu().
 */

struct rcu_head {
	struct cds_wfcq_node next;
	void (*func)(struct rcu_head *head);
};

/*
 * Exported functions
 *
 * Important: see rcu-api.txt in userspace-rcu documentation for
 * call_rcu family of functions usage detail, including the surrounding
 * RCU usage required when using these primitives.
 */

void call_rcu(struct rcu_head *head,
	      void (*func)(struct rcu_head *head));

struct call_rcu_data *create_call_rcu_data(unsigned long flags,
					   int cpu_affinity);
void call_rcu_data_free(struct call_rcu_data *crdp);

struct call_rcu_data *get_default_call_rcu_data(void);
struct call_rcu_data *get_cpu_call_rcu_data(int cpu);
struct call_rcu_data *get_thread_call_rcu_data(void);
struct call_rcu_data *get_call_rcu_data(void);
pthread_t get_call_rcu_thread(struct call_rcu_data *crdp);

void set_thread_call_rcu_data(struct call_rcu_data *crdp);
int set_cpu_call_rcu_data(int cpu, struct call_rcu_data *crdp);

int create_all_cpu_call_rcu_data(unsigned long flags);
void free_all_cpu_call_rcu_data(void);

void call_rcu_before_fork(void);
void call_rcu_after_fork_parent(void);
void call_rcu_after_fork_child(void);

void rcu_barrier(void);

#ifdef __cplusplus 
}
#endif

#endif /* _URCU_CALL_RCU_H */
Commit	Line	Data
	1	#ifndef _URCU_CALL_RCU_H
	2	#define _URCU_CALL_RCU_H
	3
	4	/*
	5	* urcu-call-rcu.h
	6	*
	7	* Userspace RCU header - deferred execution
	8	*
	9	* Copyright (c) 2009 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	10	* Copyright (c) 2009 Paul E. McKenney, IBM Corporation.
	11	*
	12	* LGPL-compatible code should include this header with :
	13	*
	14	* #define _LGPL_SOURCE
	15	* #include <urcu-defer.h>
	16	*
	17	* This library is free software; you can redistribute it and/or
	18	* modify it under the terms of the GNU Lesser General Public
	19	* License as published by the Free Software Foundation; either
	20	* version 2.1 of the License, or (at your option) any later version.
	21	*
	22	* This library is distributed in the hope that it will be useful,
	23	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	24	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	25	* Lesser General Public License for more details.
	26	*
	27	* You should have received a copy of the GNU Lesser General Public
	28	* License along with this library; if not, write to the Free Software
	29	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	30	*/
	31
	32	#include <stdlib.h>
	33	#include <pthread.h>
	34
	35	#include <urcu/wfcqueue.h>
	36
	37	#ifdef __cplusplus
	38	extern "C" {
	39	#endif
	40
	41	/* Note that struct call_rcu_data is opaque to callers. */
	42
	43	struct call_rcu_data;
	44
	45	/* Flag values. */
	46
	47	#define URCU_CALL_RCU_RT (1U << 0)
	48	#define URCU_CALL_RCU_RUNNING (1U << 1)
	49	#define URCU_CALL_RCU_STOP (1U << 2)
	50	#define URCU_CALL_RCU_STOPPED (1U << 3)
	51	#define URCU_CALL_RCU_PAUSE (1U << 4)
	52	#define URCU_CALL_RCU_PAUSED (1U << 5)
	53
	54	/*
	55	* The rcu_head data structure is placed in the structure to be freed
	56	* via call_rcu().
	57	*/
	58
	59	struct rcu_head {
	60	struct cds_wfcq_node next;
	61	void (func)(struct rcu_head head);
	62	};
	63
	64	/*
	65	* Exported functions
	66	*
	67	* Important: see rcu-api.txt in userspace-rcu documentation for
	68	* call_rcu family of functions usage detail, including the surrounding
	69	* RCU usage required when using these primitives.
	70	*/
	71
	72	void call_rcu(struct rcu_head *head,
	73	void (func)(struct rcu_head head));
	74
	75	struct call_rcu_data *create_call_rcu_data(unsigned long flags,
	76	int cpu_affinity);
	77	void call_rcu_data_free(struct call_rcu_data *crdp);
	78
	79	struct call_rcu_data *get_default_call_rcu_data(void);
	80	struct call_rcu_data *get_cpu_call_rcu_data(int cpu);
	81	struct call_rcu_data *get_thread_call_rcu_data(void);
	82	struct call_rcu_data *get_call_rcu_data(void);
	83	pthread_t get_call_rcu_thread(struct call_rcu_data *crdp);
	84
	85	void set_thread_call_rcu_data(struct call_rcu_data *crdp);
	86	int set_cpu_call_rcu_data(int cpu, struct call_rcu_data *crdp);
	87
	88	int create_all_cpu_call_rcu_data(unsigned long flags);
	89	void free_all_cpu_call_rcu_data(void);
	90
	91	void call_rcu_before_fork(void);
	92	void call_rcu_after_fork_parent(void);
	93	void call_rcu_after_fork_child(void);
	94
	95	void rcu_barrier(void);
	96
	97	#ifdef __cplusplus
	98	}
	99	#endif
	100
	101	#endif /* _URCU_CALL_RCU_H */