[lttng-ust.git] / liblttng-ust / clock.h

/*
 * Copyright (C) 2010  Pierre-Marc Fournier
 * Copyright (C) 2011  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; 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
 */

#ifndef _UST_CLOCK_H
#define _UST_CLOCK_H

#include <time.h>
#include <sys/time.h>
#include <stdint.h>
#include <stddef.h>

/* TRACE CLOCK */

/*
 * Currently using the kernel MONOTONIC clock, waiting for kernel-side
 * LTTng to implement mmap'd trace clock.
 */

/* Choosing correct trace clock */

static __inline__ uint64_t trace_clock_read64(void)
{
	struct timespec ts;

	clock_gettime(CLOCK_MONOTONIC, &ts);
	return ((uint64_t) ts.tv_sec * 1000000000ULL) + ts.tv_nsec;
}

static __inline__ uint32_t trace_clock_freq_scale(void)
{
	return 1;
}

#endif /* _UST_CLOCK_H */
Commit	Line	Data
	1	/*
	2	* Copyright (C) 2010 Pierre-Marc Fournier
	3	* Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	4	*
	5	* This library is free software; you can redistribute it and/or
	6	* modify it under the terms of the GNU Lesser General Public
	7	* License as published by the Free Software Foundation; version 2.1 of
	8	* the License.
	9	*
	10	* This library is distributed in the hope that it will be useful,
	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	13	* Lesser General Public License for more details.
	14	*
	15	* You should have received a copy of the GNU Lesser General Public
	16	* License along with this library; if not, write to the Free Software
	17	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	18	*/
	19
	20	#ifndef _UST_CLOCK_H
	21	#define _UST_CLOCK_H
	22
	23	#include <time.h>
	24	#include <sys/time.h>
	25	#include <stdint.h>
	26	#include <stddef.h>
	27
	28	/* TRACE CLOCK */
	29
	30	/*
	31	* Currently using the kernel MONOTONIC clock, waiting for kernel-side
	32	* LTTng to implement mmap'd trace clock.
	33	*/
	34
	35	/* Choosing correct trace clock */
	36
	37	static __inline__ uint64_t trace_clock_read64(void)
	38	{
	39	struct timespec ts;
	40
	41	clock_gettime(CLOCK_MONOTONIC, &ts);
	42	return ((uint64_t) ts.tv_sec * 1000000000ULL) + ts.tv_nsec;
	43	}
	44
	45	static __inline__ uint32_t trace_clock_freq_scale(void)
	46	{
	47	return 1;
	48	}
	49
	50	#endif /* _UST_CLOCK_H */