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119 lines
4.1 KiB
C
119 lines
4.1 KiB
C
/* Support code for timespec checks.
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Copyright (C) 2019-2025 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <support/timespec.h>
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#include <stdio.h>
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#include <stdint.h>
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#include <assert.h>
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#include <intprops.h>
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void
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test_timespec_before_impl (const char *file, int line, struct timespec left,
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struct timespec right)
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{
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if (left.tv_sec > right.tv_sec
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|| (left.tv_sec == right.tv_sec
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&& left.tv_nsec > right.tv_nsec)) {
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support_record_failure ();
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const struct timespec diff = timespec_sub (left, right);
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printf ("%s:%d: %jd.%09jds not before %jd.%09jds "
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"(difference %jd.%09jds)\n",
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file, line,
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(intmax_t) left.tv_sec, (intmax_t) left.tv_nsec,
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(intmax_t) right.tv_sec, (intmax_t) right.tv_nsec,
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(intmax_t) diff.tv_sec, (intmax_t) diff.tv_nsec);
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}
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}
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void
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test_timespec_equal_or_after_impl (const char *file, int line,
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struct timespec left,
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struct timespec right)
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{
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if (left.tv_sec < right.tv_sec
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|| (left.tv_sec == right.tv_sec
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&& left.tv_nsec < right.tv_nsec)) {
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support_record_failure ();
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const struct timespec diff = timespec_sub (right, left);
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printf ("%s:%d: %jd.%09jds not after %jd.%09jds "
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"(difference %jd.%09jds)\n",
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file, line,
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(intmax_t) left.tv_sec, (intmax_t) left.tv_nsec,
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(intmax_t) right.tv_sec, (intmax_t) right.tv_nsec,
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(intmax_t) diff.tv_sec, (intmax_t) diff.tv_nsec);
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}
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}
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/* Convert TIME to nanoseconds stored in a time_t.
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Returns time_t maximum or minimum if the conversion overflows
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or underflows, respectively. */
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time_t
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support_timespec_ns (struct timespec time)
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{
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time_t time_ns;
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if (INT_MULTIPLY_WRAPV(time.tv_sec, TIMESPEC_HZ, &time_ns))
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return time.tv_sec < 0 ? TYPE_MINIMUM(time_t) : TYPE_MAXIMUM(time_t);
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if (INT_ADD_WRAPV(time_ns, time.tv_nsec, &time_ns))
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return time.tv_nsec < 0 ? TYPE_MINIMUM(time_t) : TYPE_MAXIMUM(time_t);
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return time_ns;
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}
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/* Returns time normalized timespec with .tv_nsec < TIMESPEC_HZ
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and the whole seconds added to .tv_sec. If an overflow or
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underflow occurs the values are clamped to its maximum or
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minimum respectively. */
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struct timespec
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support_timespec_normalize (struct timespec time)
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{
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struct timespec norm;
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if (INT_ADD_WRAPV (time.tv_sec, (time.tv_nsec / TIMESPEC_HZ), &norm.tv_sec))
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{
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norm.tv_sec = (time.tv_nsec < 0) ? TYPE_MINIMUM (time_t): TYPE_MAXIMUM (time_t);
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norm.tv_nsec = (time.tv_nsec < 0) ? -1 * (TIMESPEC_HZ - 1) : TIMESPEC_HZ - 1;
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return norm;
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}
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norm.tv_nsec = time.tv_nsec % TIMESPEC_HZ;
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return norm;
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}
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/* Returns TRUE if the observed time is within the given percentage
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bounds of the expected time, and FALSE otherwise.
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For example the call
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support_timespec_check_in_range(expected, observed, 0.5, 1.2);
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will check if
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0.5 of expected <= observed <= 1.2 of expected
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In other words it will check if observed time is within 50% to
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120% of the expected time. */
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int
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support_timespec_check_in_range (struct timespec expected, struct timespec observed,
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double lower_bound, double upper_bound)
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{
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assert (upper_bound >= lower_bound);
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time_t expected_norm, observed_norm;
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expected_norm = support_timespec_ns (expected);
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/* Don't divide by zero */
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assert(expected_norm != 0);
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observed_norm = support_timespec_ns (observed);
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double ratio = (double)observed_norm / expected_norm;
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return (lower_bound <= ratio && ratio <= upper_bound);
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}
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