Fix: handle clock offset with frequency different from 1GHz
[babeltrace.git] / include / babeltrace / clock-internal.h
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1#ifndef _BABELTRACE_CLOCK_INTERNAL_H
2#define _BABELTRACE_CLOCK_INTERNAL_H
3
4/*
5 * BabelTrace
6 *
7 * clocks header (internal)
8 *
9 * Copyright 2012 EfficiOS Inc. and Linux Foundation
10 *
11 * Author: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
12 * Julien Desfossez <julien.desfossez@efficios.com>
13 *
14 * Permission is hereby granted, free of charge, to any person obtaining a copy
15 * of this software and associated documentation files (the "Software"), to deal
16 * in the Software without restriction, including without limitation the rights
17 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
18 * copies of the Software, and to permit persons to whom the Software is
19 * furnished to do so, subject to the following conditions:
20 *
21 * The above copyright notice and this permission notice shall be included in
22 * all copies or substantial portions of the Software.
23 */
24
25static inline
26uint64_t clock_cycles_to_ns(struct ctf_clock *clock, uint64_t cycles)
27{
28 if (clock->freq == 1000000000ULL) {
29 /* 1GHZ freq, no need to scale cycles value */
30 return cycles;
31 } else {
32 return (double) cycles * 1000000000.0
33 / (double) clock->freq;
34 }
35}
36
37#endif /* _BABELTRACE_CLOCK_INTERNAL_H */
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