71 lines
2.1 KiB
C
71 lines
2.1 KiB
C
|
/*
|
||
|
|
* Copyright (c) Meta Platforms, Inc. and affiliates.
|
||
|
|
* All rights reserved.
|
||
|
|
*
|
||
|
|
* This source code is licensed under both the BSD-style license (found in the
|
||
|
|
* LICENSE file in the root directory of this source tree) and the GPLv2 (found
|
||
|
|
* in the COPYING file in the root directory of this source tree).
|
||
|
|
* You may select, at your option, one of the above-listed licenses.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef TIME_FN_H_MODULE_287987
|
||
|
|
#define TIME_FN_H_MODULE_287987
|
||
|
|
|
||
|
|
#if defined (__cplusplus)
|
||
|
|
extern "C" {
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
/*-****************************************
|
||
|
|
* Types
|
||
|
|
******************************************/
|
||
|
|
|
||
|
|
#if !defined (__VMS) && (defined (__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */) )
|
||
|
|
# if defined(_AIX)
|
||
|
|
# include <inttypes.h>
|
||
|
|
# else
|
||
|
|
# include <stdint.h> /* uint64_t */
|
||
|
|
# endif
|
||
|
|
typedef uint64_t PTime; /* Precise Time */
|
||
|
|
#else
|
||
|
|
typedef unsigned long long PTime; /* does not support compilers without long long support */
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* UTIL_time_t contains a nanosecond time counter.
|
||
|
|
* The absolute value is not meaningful.
|
||
|
|
* It's only valid to compute the difference between 2 measurements. */
|
||
|
|
typedef struct { PTime t; } UTIL_time_t;
|
||
|
|
#define UTIL_TIME_INITIALIZER { 0 }
|
||
|
|
|
||
|
|
|
||
|
|
/*-****************************************
|
||
|
|
* Time functions
|
||
|
|
******************************************/
|
||
|
|
|
||
|
|
UTIL_time_t UTIL_getTime(void);
|
||
|
|
|
||
|
|
/* Timer resolution can be low on some platforms.
|
||
|
|
* To improve accuracy, it's recommended to wait for a new tick
|
||
|
|
* before starting benchmark measurements */
|
||
|
|
void UTIL_waitForNextTick(void);
|
||
|
|
/* tells if timefn will return correct time measurements
|
||
|
|
* in presence of multi-threaded workload.
|
||
|
|
* note : this is not the case if only C90 clock_t measurements are available */
|
||
|
|
int UTIL_support_MT_measurements(void);
|
||
|
|
|
||
|
|
PTime UTIL_getSpanTimeNano(UTIL_time_t clockStart, UTIL_time_t clockEnd);
|
||
|
|
PTime UTIL_clockSpanNano(UTIL_time_t clockStart);
|
||
|
|
|
||
|
|
PTime UTIL_getSpanTimeMicro(UTIL_time_t clockStart, UTIL_time_t clockEnd);
|
||
|
|
PTime UTIL_clockSpanMicro(UTIL_time_t clockStart);
|
||
|
|
|
||
|
|
#define SEC_TO_MICRO ((PTime)1000000) /* nb of microseconds in a second */
|
||
|
|
|
||
|
|
|
||
|
|
#if defined (__cplusplus)
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif /* TIME_FN_H_MODULE_287987 */
|