weston/tests/timespec-test.c
Alexandros Frantzis 6c2752a863 shared: Add helpers to convert between various time units and timespec
Add helper functions to make it easy and less error-prone to convert
between values in various time units (nsec, usec, msec) and struct
timespec. These helpers are going to be used in the upcoming commits to
transition the Weston codebase to struct timespec.

Signed-off-by: Alexandros Frantzis <alexandros.frantzis@collabora.com>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
2017-11-27 11:18:25 +02:00

250 lines
5.9 KiB
C

/*
* Copyright © 2016 Collabora, Ltd.
*
* 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 (including the
* next paragraph) 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.
*/
#include "config.h"
#include <stdlib.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include <errno.h>
#include <unistd.h>
#include "timespec-util.h"
#include "shared/helpers.h"
#include "zunitc/zunitc.h"
ZUC_TEST(timespec_test, timespec_sub)
{
struct timespec a, b, r;
a.tv_sec = 1;
a.tv_nsec = 1;
b.tv_sec = 0;
b.tv_nsec = 2;
timespec_sub(&r, &a, &b);
ZUC_ASSERT_EQ(r.tv_sec, 0);
ZUC_ASSERT_EQ(r.tv_nsec, NSEC_PER_SEC - 1);
}
ZUC_TEST(timespec_test, timespec_to_nsec)
{
struct timespec a;
a.tv_sec = 4;
a.tv_nsec = 4;
ZUC_ASSERT_EQ(timespec_to_nsec(&a), (NSEC_PER_SEC * 4ULL) + 4);
}
ZUC_TEST(timespec_test, timespec_to_usec)
{
struct timespec a;
a.tv_sec = 4;
a.tv_nsec = 4000;
ZUC_ASSERT_EQ(timespec_to_usec(&a), (4000000ULL) + 4);
}
ZUC_TEST(timespec_test, timespec_to_msec)
{
struct timespec a;
a.tv_sec = 4;
a.tv_nsec = 4000000;
ZUC_ASSERT_EQ(timespec_to_msec(&a), (4000ULL) + 4);
}
ZUC_TEST(timespec_test, millihz_to_nsec)
{
ZUC_ASSERT_EQ(millihz_to_nsec(60000), 16666666);
}
ZUC_TEST(timespec_test, timespec_add_nsec)
{
struct timespec a, r;
a.tv_sec = 0;
a.tv_nsec = NSEC_PER_SEC - 1;
timespec_add_nsec(&r, &a, 1);
ZUC_ASSERT_EQ(1, r.tv_sec);
ZUC_ASSERT_EQ(0, r.tv_nsec);
timespec_add_nsec(&r, &a, 2);
ZUC_ASSERT_EQ(1, r.tv_sec);
ZUC_ASSERT_EQ(1, r.tv_nsec);
timespec_add_nsec(&r, &a, (NSEC_PER_SEC * 2ULL));
ZUC_ASSERT_EQ(2, r.tv_sec);
ZUC_ASSERT_EQ(NSEC_PER_SEC - 1, r.tv_nsec);
timespec_add_nsec(&r, &a, (NSEC_PER_SEC * 2ULL) + 2);
ZUC_ASSERT_EQ(r.tv_sec, 3);
ZUC_ASSERT_EQ(r.tv_nsec, 1);
a.tv_sec = 1;
a.tv_nsec = 1;
timespec_add_nsec(&r, &a, -2);
ZUC_ASSERT_EQ(r.tv_sec, 0);
ZUC_ASSERT_EQ(r.tv_nsec, NSEC_PER_SEC - 1);
a.tv_nsec = 0;
timespec_add_nsec(&r, &a, -NSEC_PER_SEC);
ZUC_ASSERT_EQ(0, r.tv_sec);
ZUC_ASSERT_EQ(0, r.tv_nsec);
a.tv_nsec = 0;
timespec_add_nsec(&r, &a, -NSEC_PER_SEC + 1);
ZUC_ASSERT_EQ(0, r.tv_sec);
ZUC_ASSERT_EQ(1, r.tv_nsec);
a.tv_nsec = 50;
timespec_add_nsec(&r, &a, (-NSEC_PER_SEC * 10ULL));
ZUC_ASSERT_EQ(-9, r.tv_sec);
ZUC_ASSERT_EQ(50, r.tv_nsec);
r.tv_sec = 4;
r.tv_nsec = 0;
timespec_add_nsec(&r, &r, NSEC_PER_SEC + 10ULL);
ZUC_ASSERT_EQ(5, r.tv_sec);
ZUC_ASSERT_EQ(10, r.tv_nsec);
timespec_add_nsec(&r, &r, (NSEC_PER_SEC * 3ULL) - 9ULL);
ZUC_ASSERT_EQ(8, r.tv_sec);
ZUC_ASSERT_EQ(1, r.tv_nsec);
timespec_add_nsec(&r, &r, (NSEC_PER_SEC * 7ULL) + (NSEC_PER_SEC - 1ULL));
ZUC_ASSERT_EQ(16, r.tv_sec);
ZUC_ASSERT_EQ(0, r.tv_nsec);
}
ZUC_TEST(timespec_test, timespec_add_msec)
{
struct timespec a, r;
a.tv_sec = 1000;
a.tv_nsec = 1;
timespec_add_msec(&r, &a, 2002);
ZUC_ASSERT_EQ(1002, r.tv_sec);
ZUC_ASSERT_EQ(2000001, r.tv_nsec);
}
ZUC_TEST(timespec_test, timespec_sub_to_nsec)
{
struct timespec a, b;
a.tv_sec = 1000;
a.tv_nsec = 1;
b.tv_sec = 1;
b.tv_nsec = 2;
ZUC_ASSERT_EQ((999L * NSEC_PER_SEC) - 1, timespec_sub_to_nsec(&a, &b));
}
ZUC_TEST(timespec_test, timespec_sub_to_msec)
{
struct timespec a, b;
a.tv_sec = 1000;
a.tv_nsec = 2000000L;
b.tv_sec = 2;
b.tv_nsec = 1000000L;
ZUC_ASSERT_EQ((998 * 1000) + 1, timespec_sub_to_msec(&a, &b));
}
ZUC_TEST(timespec_test, timespec_from_nsec)
{
struct timespec a;
timespec_from_nsec(&a, 0);
ZUC_ASSERT_EQ(0, a.tv_sec);
ZUC_ASSERT_EQ(0, a.tv_nsec);
timespec_from_nsec(&a, NSEC_PER_SEC - 1);
ZUC_ASSERT_EQ(0, a.tv_sec);
ZUC_ASSERT_EQ(NSEC_PER_SEC - 1, a.tv_nsec);
timespec_from_nsec(&a, NSEC_PER_SEC);
ZUC_ASSERT_EQ(1, a.tv_sec);
ZUC_ASSERT_EQ(0, a.tv_nsec);
timespec_from_nsec(&a, (5L * NSEC_PER_SEC) + 1);
ZUC_ASSERT_EQ(5, a.tv_sec);
ZUC_ASSERT_EQ(1, a.tv_nsec);
}
ZUC_TEST(timespec_test, timespec_from_usec)
{
struct timespec a;
timespec_from_usec(&a, 0);
ZUC_ASSERT_EQ(0, a.tv_sec);
ZUC_ASSERT_EQ(0, a.tv_nsec);
timespec_from_usec(&a, 999999);
ZUC_ASSERT_EQ(0, a.tv_sec);
ZUC_ASSERT_EQ(999999 * 1000, a.tv_nsec);
timespec_from_usec(&a, 1000000);
ZUC_ASSERT_EQ(1, a.tv_sec);
ZUC_ASSERT_EQ(0, a.tv_nsec);
timespec_from_usec(&a, 5000001);
ZUC_ASSERT_EQ(5, a.tv_sec);
ZUC_ASSERT_EQ(1000, a.tv_nsec);
}
ZUC_TEST(timespec_test, timespec_from_msec)
{
struct timespec a;
timespec_from_msec(&a, 0);
ZUC_ASSERT_EQ(0, a.tv_sec);
ZUC_ASSERT_EQ(0, a.tv_nsec);
timespec_from_msec(&a, 999);
ZUC_ASSERT_EQ(0, a.tv_sec);
ZUC_ASSERT_EQ(999 * 1000000, a.tv_nsec);
timespec_from_msec(&a, 1000);
ZUC_ASSERT_EQ(1, a.tv_sec);
ZUC_ASSERT_EQ(0, a.tv_nsec);
timespec_from_msec(&a, 5001);
ZUC_ASSERT_EQ(5, a.tv_sec);
ZUC_ASSERT_EQ(1000000, a.tv_nsec);
}
ZUC_TEST(timespec_test, timespec_is_zero)
{
struct timespec zero = { 0 };
struct timespec non_zero_sec = { .tv_sec = 1, .tv_nsec = 0 };
struct timespec non_zero_nsec = { .tv_sec = 0, .tv_nsec = 1 };
ZUC_ASSERT_TRUE(timespec_is_zero(&zero));
ZUC_ASSERT_FALSE(timespec_is_zero(&non_zero_nsec));
ZUC_ASSERT_FALSE(timespec_is_zero(&non_zero_sec));
}