54 lines
1.8 KiB
C
54 lines
1.8 KiB
C
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/* Copyright 2019 by sysmocom s.f.m.c. GmbH <info@sysmocom.de>
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*
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* All Rights Reserved
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include <osmocom/core/timer.h>
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#include <osmocom/hlr/timestamp.h>
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/* Central implementation to set a timestamp to the current time, in case we want to modify this in the future. */
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void timestamp_update(timestamp_t *timestamp)
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{
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struct timeval tv;
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time_t raw;
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struct tm utc;
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/* The simpler way would be just time(&raw), but by using osmo_gettimeofday() we can also use
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* osmo_gettimeofday_override for unit tests independent from real time. */
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osmo_gettimeofday(&tv, NULL);
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raw = tv.tv_sec;
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gmtime_r(&raw, &utc);
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*timestamp = mktime(&utc);
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}
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/* Calculate seconds since a given timestamp was taken. Return true for a valid age returned in age_p, return false if
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* the timestamp is either in the future or the age surpasses uint32_t range. When false is returned, *age_p is set to
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* UINT32_MAX. */
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bool timestamp_age(const timestamp_t *timestamp, uint32_t *age_p)
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{
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int64_t age64;
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timestamp_t now;
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timestamp_update(&now);
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age64 = (int64_t)now - (int64_t)(*timestamp);
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if (age64 < 0 || age64 > UINT32_MAX) {
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*age_p = UINT32_MAX;
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return false;
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}
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*age_p = (uint32_t)age64;
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return true;
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}
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