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

/*
 * Copyright (C) 2016 Michael Jeanson <mjeanson@efficios.com>
 *
 * SPDX-License-Identifier: MIT
 *
 */

#ifndef _COMPAT_TIME_H
#define _COMPAT_TIME_H

#include <time.h>

#ifdef __APPLE__

#include <cstdint>

typedef uint64_t timer_t;

#include <mach/mach.h>
#include <mach/clock.h>
#include <common/compat/errno.hpp>

#undef NSEC_PER_SEC
#undef NSEC_PER_MSEC
#undef NSEC_PER_USEC
#undef USEC_PER_SEC

#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
	1	/*
	2	* Copyright (C) 2016 Michael Jeanson <mjeanson@efficios.com>
	3	*
	4	* SPDX-License-Identifier: MIT
	5	*
	6	*/
	7
	8	#ifndef _COMPAT_TIME_H
	9	#define _COMPAT_TIME_H
	10
	11	#include <time.h>
	12
	13	#ifdef __APPLE__
	14
	15	#include <cstdint>
	16
	17	typedef uint64_t timer_t;
	18
	19	#include <mach/mach.h>
	20	#include <mach/clock.h>
	21	#include <common/compat/errno.hpp>
	22
	23	#undef NSEC_PER_SEC
	24	#undef NSEC_PER_MSEC
	25	#undef NSEC_PER_USEC
	26	#undef USEC_PER_SEC
	27
	28	#endif /* __APPLE__ */
	29
	30	/* macOS/OS X 10.12 (Sierra) and up provide clock_gettime() */
	31	#if defined(__APPLE__) && !defined(LTTNG_HAVE_CLOCK_GETTIME)
	32
	33	typedef int clockid_t;
	34	#define CLOCK_REALTIME CALENDAR_CLOCK
	35	#define CLOCK_MONOTONIC SYSTEM_CLOCK
	36
	37	static inline
	38	int lttng_clock_gettime(clockid_t clk_id, struct timespec *tp)
	39	{
	40	int ret = 0;
	41	clock_serv_t clock;
	42	mach_timespec_t now;
	43
	44	if (clk_id != CLOCK_REALTIME && clk_id != CLOCK_MONOTONIC) {
	45	ret = -1;
	46	errno = EINVAL;
	47	goto end;
	48	}
	49
	50	host_get_clock_service(mach_host_self(), clk_id, &clock);
	51
	52	ret = clock_get_time(clock, &now);
	53	if (ret != KERN_SUCCESS) {
	54	ret = -1;
	55	goto deallocate;
	56	}
	57
	58	tp->tv_sec = now.tv_sec;
	59	tp->tv_nsec = now.tv_nsec;
	60
	61	deallocate:
	62	mach_port_deallocate(mach_task_self(), clock);
	63	end:
	64	return ret;
	65	}
	66
	67	#else /* __APPLE__ && !LTTNG_HAVE_CLOCK_GETTIME */
	68
	69	static inline
	70	int lttng_clock_gettime(clockid_t clk_id, struct timespec *tp)
	71	{
	72	return clock_gettime(clk_id, tp);
	73	}
	74
	75	#endif /* __APPLE__ && !LTTNG_HAVE_CLOCK_GETTIME */
	76
	77	#endif /* _COMPAT_TIME_H */