[lttngtop.git] / lib / babeltrace / clock-internal.h

#ifndef _BABELTRACE_CLOCK_INTERNAL_H
#define _BABELTRACE_CLOCK_INTERNAL_H

/*
 * BabelTrace
 *
 * clocks header (internal)
 *
 * Copyright 2012 EfficiOS Inc. and Linux Foundation
 *
 * Author: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 *         Julien Desfossez <julien.desfossez@efficios.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

static inline
uint64_t clock_cycles_to_ns(struct ctf_clock *clock, uint64_t cycles)
{
	if (clock->freq == 1000000000ULL) {
		/* 1GHZ freq, no need to scale cycles value */
		return cycles;
	} else {
		return (double) cycles * 1000000000.0
				/ (double) clock->freq;
	}
}

#endif /* _BABELTRACE_CLOCK_INTERNAL_H */
Commit	Line	Data
b1acd2b3 JD	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	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	25	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	26	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	27	* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	28	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	29	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	30	* SOFTWARE.
	31	*/
	32
	33	static inline
	34	uint64_t clock_cycles_to_ns(struct ctf_clock *clock, uint64_t cycles)
	35	{
	36	if (clock->freq == 1000000000ULL) {
	37	/* 1GHZ freq, no need to scale cycles value */
	38	return cycles;
	39	} else {
	40	return (double) cycles * 1000000000.0
	41	/ (double) clock->freq;
	42	}
	43	}
	44
	45	#endif /* _BABELTRACE_CLOCK_INTERNAL_H */