1/*	$NetBSD: time-internal.h,v 1.6 2020/05/25 20:47:33 christos Exp $	*/
2
3/*
4 * Copyright (c) 2000-2007 Niels Provos <provos@citi.umich.edu>
5 * Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 *    derived from this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 */
29#ifndef TIME_INTERNAL_H_INCLUDED_
30#define TIME_INTERNAL_H_INCLUDED_
31
32#include "event2/event-config.h"
33#include "evconfig-private.h"
34
35#ifdef EVENT__HAVE_MACH_MACH_TIME_H
36/* For mach_timebase_info */
37#include <mach/mach_time.h>
38#endif
39
40#include <time.h>
41
42#include "event2/util.h"
43
44#ifdef __cplusplus
45extern "C" {
46#endif
47
48#if defined(EVENT__HAVE_CLOCK_GETTIME) && defined(CLOCK_MONOTONIC)
49#define HAVE_POSIX_MONOTONIC
50#elif defined(EVENT__HAVE_MACH_ABSOLUTE_TIME)
51#define HAVE_MACH_MONOTONIC
52#elif defined(_WIN32)
53#define HAVE_WIN32_MONOTONIC
54#else
55#define HAVE_FALLBACK_MONOTONIC
56#endif
57
58long evutil_tv_to_msec_(const struct timeval *tv);
59void evutil_usleep_(const struct timeval *tv);
60
61#ifdef _WIN32
62typedef ULONGLONG (WINAPI *ev_GetTickCount_func)(void);
63#endif
64
65struct evutil_monotonic_timer {
66
67#ifdef HAVE_MACH_MONOTONIC
68	struct mach_timebase_info mach_timebase_units;
69#endif
70
71#ifdef HAVE_POSIX_MONOTONIC
72	int monotonic_clock;
73#endif
74
75#ifdef HAVE_WIN32_MONOTONIC
76	ev_GetTickCount_func GetTickCount64_fn;
77	ev_GetTickCount_func GetTickCount_fn;
78	ev_uint64_t last_tick_count;
79	ev_uint64_t adjust_tick_count;
80
81	ev_uint64_t first_tick;
82	ev_uint64_t first_counter;
83	double usec_per_count;
84	int use_performance_counter;
85#endif
86
87	struct timeval adjust_monotonic_clock;
88	struct timeval last_time;
89};
90
91int evutil_configure_monotonic_time_(struct evutil_monotonic_timer *mt,
92    int flags);
93int evutil_gettime_monotonic_(struct evutil_monotonic_timer *mt, struct timeval *tv);
94
95
96#ifdef __cplusplus
97}
98#endif
99
100#endif /* EVENT_INTERNAL_H_INCLUDED_ */
101