1/*	$NetBSD: time-internal.h,v 1.1.1.2 2021/04/07 02:43:13 christos Exp $	*/
2/*
3 * Copyright (c) 2000-2007 Niels Provos <provos@citi.umich.edu>
4 * Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 *    derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28#ifndef TIME_INTERNAL_H_INCLUDED_
29#define TIME_INTERNAL_H_INCLUDED_
30
31#include "event2/event-config.h"
32#include "evconfig-private.h"
33
34#ifdef EVENT__HAVE_MACH_MACH_TIME_H
35/* For mach_timebase_info */
36#include <mach/mach_time.h>
37#endif
38
39#include <time.h>
40
41#include "event2/util.h"
42
43#ifdef __cplusplus
44extern "C" {
45#endif
46
47#if defined(EVENT__HAVE_CLOCK_GETTIME) && defined(CLOCK_MONOTONIC)
48#define HAVE_POSIX_MONOTONIC
49#elif defined(EVENT__HAVE_MACH_ABSOLUTE_TIME)
50#define HAVE_MACH_MONOTONIC
51#elif defined(_WIN32)
52#define HAVE_WIN32_MONOTONIC
53#else
54#define HAVE_FALLBACK_MONOTONIC
55#endif
56
57long evutil_tv_to_msec_(const struct timeval *tv);
58EVENT2_EXPORT_SYMBOL
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
91EVENT2_EXPORT_SYMBOL
92int evutil_configure_monotonic_time_(struct evutil_monotonic_timer *mt,
93    int flags);
94EVENT2_EXPORT_SYMBOL
95int evutil_gettime_monotonic_(struct evutil_monotonic_timer *mt, struct timeval *tv);
96
97
98#ifdef __cplusplus
99}
100#endif
101
102#endif /* EVENT_INTERNAL_H_INCLUDED_ */
103