[lttng-tools.git] / src / common / compat / time.h

/*
 * Copyright (C) 2016 Michael Jeanson <mjeanson@efficios.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#ifndef _COMPAT_TIME_H
#define _COMPAT_TIME_H

#include <time.h>

#ifdef __APPLE__

typedef uint64_t timer_t;

#include <mach/mach.h>
#include <mach/clock.h>
#include <errno.h>

#undef NSEC_PER_SEC
#undef NSEC_PER_MSEC
#undef NSEC_PER_USEC

#endif /* __APPLE__ */

/* macOS/OS X 10.12 (Sierra) and up provide clock_gettime() */
#if defined(__APPLE__) && !defined(LTTNG_HAVE_CLOCK_GETTIME)

typedef int clockid_t;
#define CLOCK_REALTIME CALENDAR_CLOCK
#define CLOCK_MONOTONIC SYSTEM_CLOCK

static inline
int lttng_clock_gettime(clockid_t clk_id, struct timespec *tp)
{
	int ret = 0;
	clock_serv_t clock;
	mach_timespec_t now;

	if (clk_id != CLOCK_REALTIME && clk_id != CLOCK_MONOTONIC) {
		ret = -1;
		errno = EINVAL;
		goto end;
	}

	host_get_clock_service(mach_host_self(), clk_id, &clock);

	ret = clock_get_time(clock, &now);
	if (ret != KERN_SUCCESS) {
		ret = -1;
		goto deallocate;
	}

        tp->tv_sec = now.tv_sec;
        tp->tv_nsec = now.tv_nsec;

deallocate:
	mach_port_deallocate(mach_task_self(), clock);
end:
	return ret;
}

#else /* __APPLE__ && !LTTNG_HAVE_CLOCK_GETTIME */

static inline
int lttng_clock_gettime(clockid_t clk_id, struct timespec *tp)
{
	return clock_gettime(clk_id, tp);
}

#endif /* __APPLE__ && !LTTNG_HAVE_CLOCK_GETTIME */

#endif /* _COMPAT_TIME_H */
Commit	Line	Data
389fbf04 MJ	1	/*
	2	* Copyright (C) 2016 Michael Jeanson <mjeanson@efficios.com>
	3	*
	4	* Permission is hereby granted, free of charge, to any person obtaining a copy
	5	* of this software and associated documentation files (the "Software"), to deal
	6	* in the Software without restriction, including without limitation the rights
	7	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	8	* copies of the Software, and to permit persons to whom the Software is
	9	* furnished to do so, subject to the following conditions:
	10	*
	11	* The above copyright notice and this permission notice shall be included in
	12	* all copies or substantial portions of the Software.
	13	*
	14	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	15	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	16	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	17	* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	18	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	19	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	20	* SOFTWARE.
	21	*/
	22
	23	#ifndef _COMPAT_TIME_H
	24	#define _COMPAT_TIME_H
	25
	26	#include <time.h>
	27
	28	#ifdef __APPLE__
707de922	29
389fbf04	30	typedef uint64_t timer_t;
389fbf04 MJ	31
	32	#include <mach/mach.h>
	33	#include <mach/clock.h>
df6a8b05	34	#include <errno.h>
389fbf04	35
395d6b02 JG	36	#undef NSEC_PER_SEC
	37	#undef NSEC_PER_MSEC
	38	#undef NSEC_PER_USEC
	39
707de922 JG	40	#endif /* __APPLE__ */
	41
	42	/* macOS/OS X 10.12 (Sierra) and up provide clock_gettime() */
	43	#if defined(__APPLE__) && !defined(LTTNG_HAVE_CLOCK_GETTIME)
	44
	45	typedef int clockid_t;
389fbf04 MJ	46	#define CLOCK_REALTIME CALENDAR_CLOCK
	47	#define CLOCK_MONOTONIC SYSTEM_CLOCK
	48
	49	static inline
	50	int lttng_clock_gettime(clockid_t clk_id, struct timespec *tp)
	51	{
	52	int ret = 0;
	53	clock_serv_t clock;
	54	mach_timespec_t now;
	55
	56	if (clk_id != CLOCK_REALTIME && clk_id != CLOCK_MONOTONIC) {
	57	ret = -1;
	58	errno = EINVAL;
	59	goto end;
	60	}
	61
	62	host_get_clock_service(mach_host_self(), clk_id, &clock);
	63
	64	ret = clock_get_time(clock, &now);
	65	if (ret != KERN_SUCCESS) {
	66	ret = -1;
	67	goto deallocate;
	68	}
	69
	70	tp->tv_sec = now.tv_sec;
	71	tp->tv_nsec = now.tv_nsec;
	72
	73	deallocate:
	74	mach_port_deallocate(mach_task_self(), clock);
	75	end:
	76	return ret;
	77	}
	78
707de922	79	#else /* __APPLE__ && !LTTNG_HAVE_CLOCK_GETTIME */
389fbf04 MJ	80
	81	static inline
	82	int lttng_clock_gettime(clockid_t clk_id, struct timespec *tp)
	83	{
	84	return clock_gettime(clk_id, tp);
	85	}
	86
707de922	87	#endif /* __APPLE__ && !LTTNG_HAVE_CLOCK_GETTIME */
389fbf04 MJ	88
389fbf04 MJ	89	#endif /* _COMPAT_TIME_H */