[lttng-modules.git] / wrapper / perf.h

#ifndef _LTTNG_WRAPPER_PERF_H
#define _LTTNG_WRAPPER_PERF_H

/*
 * wrapper/perf.h
 *
 * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 *
 * 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; only
 * version 2.1 of the License.
 *
 * 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 <linux/perf_event.h>

#ifdef CONFIG_PERF_EVENTS

#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,1,0))
static inline struct perf_event *
wrapper_perf_event_create_kernel_counter(struct perf_event_attr *attr,
				int cpu,
				struct task_struct *task,
				perf_overflow_handler_t callback)
{
	return perf_event_create_kernel_counter(attr, cpu, task, callback, NULL);
}
#else /* (LINUX_VERSION_CODE >= KERNEL_VERSION(3,1,0)) */

#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,37))
static inline struct perf_event *
wrapper_perf_event_create_kernel_counter(struct perf_event_attr *attr,
				int cpu,
				struct task_struct *task,
				perf_overflow_handler_t callback)
{
	return perf_event_create_kernel_counter(attr, cpu, task, callback);
}
#else /* (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,37)) */
static inline struct perf_event *
wrapper_perf_event_create_kernel_counter(struct perf_event_attr *attr,
				int cpu,
				struct task_struct *task,
				perf_overflow_handler_t callback)
{
	pid_t pid;

	if (!task)
		pid = -1;
	else
		pid = task->pid;

	return perf_event_create_kernel_counter(attr, cpu, pid, callback);
}

#endif /* (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,37)) */

#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,36))
#define local64_read(l)		atomic64_read(l)
#endif

#endif /* (LINUX_VERSION_CODE >= KERNEL_VERSION(3,1,0)) */

#endif /* CONFIG_PERF_EVENTS */

#endif /* _LTTNG_WRAPPER_PERF_H */
Commit	Line	Data
	1	#ifndef _LTTNG_WRAPPER_PERF_H
	2	#define _LTTNG_WRAPPER_PERF_H
	3
	4	/*
	5	* wrapper/perf.h
	6	*
	7	* Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	8	*
	9	* This library is free software; you can redistribute it and/or
	10	* modify it under the terms of the GNU Lesser General Public
	11	* License as published by the Free Software Foundation; only
	12	* version 2.1 of the License.
	13	*
	14	* This library is distributed in the hope that it will be useful,
	15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	17	* Lesser General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU Lesser General Public
	20	* License along with this library; if not, write to the Free Software
	21	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	22	*/
	23
	24	#include <linux/perf_event.h>
	25
	26	#ifdef CONFIG_PERF_EVENTS
	27
	28	#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,1,0))
	29	static inline struct perf_event *
	30	wrapper_perf_event_create_kernel_counter(struct perf_event_attr *attr,
	31	int cpu,
	32	struct task_struct *task,
	33	perf_overflow_handler_t callback)
	34	{
	35	return perf_event_create_kernel_counter(attr, cpu, task, callback, NULL);
	36	}
	37	#else /* (LINUX_VERSION_CODE >= KERNEL_VERSION(3,1,0)) */
	38
	39	#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,37))
	40	static inline struct perf_event *
	41	wrapper_perf_event_create_kernel_counter(struct perf_event_attr *attr,
	42	int cpu,
	43	struct task_struct *task,
	44	perf_overflow_handler_t callback)
	45	{
	46	return perf_event_create_kernel_counter(attr, cpu, task, callback);
	47	}
	48	#else /* (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,37)) */
	49	static inline struct perf_event *
	50	wrapper_perf_event_create_kernel_counter(struct perf_event_attr *attr,
	51	int cpu,
	52	struct task_struct *task,
	53	perf_overflow_handler_t callback)
	54	{
	55	pid_t pid;
	56
	57	if (!task)
	58	pid = -1;
	59	else
	60	pid = task->pid;
	61
	62	return perf_event_create_kernel_counter(attr, cpu, pid, callback);
	63	}
	64
	65	#endif /* (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,37)) */
	66
	67	#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,36))
	68	#define local64_read(l) atomic64_read(l)
	69	#endif
	70
	71	#endif /* (LINUX_VERSION_CODE >= KERNEL_VERSION(3,1,0)) */
	72
	73	#endif /* CONFIG_PERF_EVENTS */
	74
	75	#endif /* _LTTNG_WRAPPER_PERF_H */