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/* ========================================================================= */
/**
* @file time.c
*
* @copyright
* Copyright 2023 Google LLC
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/// clock_gettime(2) is a POSIX extension, at 199309L. _XOPEN_SOURCE 500
/// defines _POSIX_C_SOURCE at 199506L.
/// gettimeofday(2) is a XSI extension, needing _XOPEN_SOURCE 500.
#define _XOPEN_SOURCE 500
#include <libbase/log.h>
#include <libbase/test.h>
#include <libbase/time.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <sys/time.h>
#include <time.h>
#undef _XOPEN_SOURCE
/* == Methods ============================================================== */
/* ------------------------------------------------------------------------- */
uint64_t bs_usec(void)
{
struct timeval tv;
if (0 != gettimeofday(&tv, NULL)) {
bs_log(BS_ERROR | BS_ERRNO, "Failed gettimeofday(%p, NULL)\n",
(void*)&tv);
return 0;
}
return (uint64_t)tv.tv_sec * UINT64_C(1000000) +
(uint64_t)tv.tv_usec % UINT64_C(1000000);
}
/* ------------------------------------------------------------------------- */
uint64_t bs_mono_nsec(void)
{
struct timespec timespec;
if (0 != clock_gettime(CLOCK_MONOTONIC, ×pec)) {
bs_log(BS_ERROR | BS_ERRNO,
"Failed clock_gettime(CLOCK_MONOTONIC, %p)",
×pec);
return 0;
}
return timespec.tv_sec * UINT64_C(1000000000) + + timespec.tv_nsec;
}
/* == Unit tests =========================================================== */
static void bs_time_test_usec(bs_test_t *test_ptr);
static void bs_time_test_nsec(bs_test_t *test_ptr);
/** Unit test cases. */
static const bs_test_case_t bs_time_test_cases[] = {
{ true, "time usec", bs_time_test_usec },
{ true, "time_mono_nsec", bs_time_test_nsec },
BS_TEST_CASE_SENTINEL()
};
const bs_test_set_t bs_time_test_set = BS_TEST_SET(
true, "time", bs_time_test_cases);
/* ------------------------------------------------------------------------- */
void bs_time_test_usec(bs_test_t *test_ptr)
{
BS_TEST_VERIFY_NEQ(test_ptr, 0, bs_usec());
}
/* ------------------------------------------------------------------------- */
void bs_time_test_nsec(bs_test_t *test_ptr)
{
uint64_t v1, v2;
v1 = bs_mono_nsec();
v2 = bs_mono_nsec();
BS_TEST_VERIFY_TRUE(test_ptr, v1 <= v2);
}
/* == End of time.c ======================================================== */
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