55 lines
1.7 KiB
C
55 lines
1.7 KiB
C
// Part of dump1090, a Mode S message decoder for RTLSDR devices.
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//
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// track.h: aircraft state tracking prototypes
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//
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// Copyright (c) 2015 Oliver Jowett <oliver@mutability.co.uk>
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//
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// This file is free software: you may copy, redistribute and/or modify it
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// under the terms of the GNU General Public License as published by the
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// Free Software Foundation, either version 2 of the License, or (at your
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// option) any later version.
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//
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// This file is distributed in the hope that it will be useful, but
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// 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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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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#ifndef DUMP1090_UTIL_H
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#define DUMP1090_UTIL_H
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#include <stdint.h>
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/* Returns system time in milliseconds */
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uint64_t mstime(void);
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/* Returns the time for the current message we're dealing with */
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extern uint64_t _messageNow;
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static inline uint64_t messageNow() {
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return _messageNow;
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}
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/* Returns the time elapsed, in nanoseconds, from t1 to t2,
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* where t1 and t2 are 12MHz counters.
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*/
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int64_t receiveclock_ns_elapsed(uint64_t t1, uint64_t t2);
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/* Same, in milliseconds */
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int64_t receiveclock_ms_elapsed(uint64_t t1, uint64_t t2);
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/* Normalize the value in ts so that ts->nsec lies in
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* [0,999999999]
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*/
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struct timespec;
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void normalize_timespec(struct timespec *ts);
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/* record current CPU time in start_time */
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void start_cpu_timing(struct timespec *start_time);
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/* add difference between start_time and the current CPU time to add_to */
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void end_cpu_timing(const struct timespec *start_time, struct timespec *add_to);
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#endif
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