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Diffstat (limited to '3rdparty/zstd/programs/timefn.h')
-rw-r--r-- | 3rdparty/zstd/programs/timefn.h | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/3rdparty/zstd/programs/timefn.h b/3rdparty/zstd/programs/timefn.h new file mode 100644 index 00000000000..b814ff8d8da --- /dev/null +++ b/3rdparty/zstd/programs/timefn.h @@ -0,0 +1,70 @@ +/* + * 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 */ |