[lttng-ust.git] / include / lttng / tracepoint-rcu.h

#ifndef _LTTNG_TRACEPOINT_RCU_H
#define _LTTNG_TRACEPOINT_RCU_H

/*
 * Copyright (c) 2011 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 *
 * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
 * OR IMPLIED.  ANY USE IS AT YOUR OWN RISK.
 *
 * Permission is hereby granted to use or copy this program
 * for any purpose,  provided the above notices are retained on all copies.
 * Permission to modify the code and to distribute modified code is granted,
 * provided the above notices are retained, and a notice that the code was
 * modified is included with the above copyright notice.
 *
 * This file allows weak linking on tracepoint RCU symbols for non-LGPL
 * code.
 */

#include <urcu/compiler.h>

#ifdef _LGPL_SOURCE

#include <urcu-bp.h>

#define tp_rcu_read_lock_bp	rcu_read_lock_bp
#define tp_rcu_read_unlock_bp	rcu_read_unlock_bp
#define tp_rcu_dereference_bp	rcu_dereference_bp
#define TP_RCU_LINK_TEST()	1

#else	/* _LGPL_SOURCE */

#define tp_rcu_read_lock_bp	tracepoint_dlopen.rcu_read_lock_sym_bp
#define tp_rcu_read_unlock_bp	tracepoint_dlopen.rcu_read_unlock_sym_bp

#define tp_rcu_dereference_bp(p)					     \
	({								     \
		typeof(p) _________p1 =	URCU_FORCE_CAST(typeof(p),	     \
			tracepoint_dlopen.rcu_dereference_sym_bp(URCU_FORCE_CAST(void *, p))); \
		(_________p1);						     \
	})

#define TP_RCU_LINK_TEST()	tp_rcu_read_lock_bp

#endif	/* _LGPL_SOURCE */

#endif	/* _LTTNG_TRACEPOINT_RCU_H */
Commit	Line	Data
40b2b5a4 MD	1	#ifndef _LTTNG_TRACEPOINT_RCU_H
	2	#define _LTTNG_TRACEPOINT_RCU_H
	3
	4	/*
	5	* Copyright (c) 2011 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	6	*
	7	* THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
	8	* OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
	9	*
	10	* Permission is hereby granted to use or copy this program
	11	* for any purpose, provided the above notices are retained on all copies.
	12	* Permission to modify the code and to distribute modified code is granted,
	13	* provided the above notices are retained, and a notice that the code was
	14	* modified is included with the above copyright notice.
	15	*
	16	* This file allows weak linking on tracepoint RCU symbols for non-LGPL
	17	* code.
	18	*/
	19
	20	#include <urcu/compiler.h>
	21
	22	#ifdef _LGPL_SOURCE
	23
	24	#include <urcu-bp.h>
	25
40b2b5a4 MD	26	#define tp_rcu_read_lock_bp rcu_read_lock_bp
	27	#define tp_rcu_read_unlock_bp rcu_read_unlock_bp
	28	#define tp_rcu_dereference_bp rcu_dereference_bp
51920067	29	#define TP_RCU_LINK_TEST() 1
40b2b5a4 MD	30
	31	#else /* _LGPL_SOURCE */
	32
51920067 MD	33	#define tp_rcu_read_lock_bp tracepoint_dlopen.rcu_read_lock_sym_bp
51920067 MD	34	#define tp_rcu_read_unlock_bp tracepoint_dlopen.rcu_read_unlock_sym_bp
40b2b5a4 MD	35
	36	#define tp_rcu_dereference_bp(p) \
	37	({ \
	38	typeof(p) _________p1 = URCU_FORCE_CAST(typeof(p), \
51920067	39	tracepoint_dlopen.rcu_dereference_sym_bp(URCU_FORCE_CAST(void *, p))); \
40b2b5a4 MD	40	(_________p1); \
	41	})
	42
51920067 MD	43	#define TP_RCU_LINK_TEST() tp_rcu_read_lock_bp
51920067 MD	44
40b2b5a4 MD	45	#endif /* _LGPL_SOURCE */
	46
	47	#endif /* _LTTNG_TRACEPOINT_RCU_H */