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86 lines
2.4 KiB
C
86 lines
2.4 KiB
C
/*
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* Copyright (c) 2016-present, Yann Collet, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under both the BSD-style license (found in the
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* LICENSE file in the root directory of this source tree) and the GPLv2 (found
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* in the COPYING file in the root directory of this source tree).
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* You may select, at your option, one of the above-listed licenses.
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*/
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#ifndef TIME_FN_H_MODULE_287987
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#define TIME_FN_H_MODULE_287987
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#if defined (__cplusplus)
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extern "C" {
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#endif
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/*-****************************************
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* Dependencies
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******************************************/
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#include <time.h> /* clock_t, clock, CLOCKS_PER_SEC */
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/*-****************************************
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* Local Types
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******************************************/
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#if !defined (__VMS) && (defined (__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */) )
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# include <stdint.h>
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typedef uint64_t PTime; /* Precise Time */
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#else
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typedef unsigned long long PTime; /* does not support compilers without long long support */
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#endif
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/*-****************************************
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* Time functions
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******************************************/
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#if defined(_WIN32) /* Windows */
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#include <windows.h> /* LARGE_INTEGER */
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typedef LARGE_INTEGER UTIL_time_t;
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#define UTIL_TIME_INITIALIZER { { 0, 0 } }
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#elif defined(__APPLE__) && defined(__MACH__)
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#include <mach/mach_time.h>
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typedef PTime UTIL_time_t;
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#define UTIL_TIME_INITIALIZER 0
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/* C11 requires timespec_get, but FreeBSD 11 lacks it, while still claiming C11 compliance.
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Android also lacks it but does define TIME_UTC. */
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#elif (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 201112L) /* C11 */) \
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&& defined(TIME_UTC) && !defined(__ANDROID__)
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typedef struct timespec UTIL_time_t;
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#define UTIL_TIME_INITIALIZER { 0, 0 }
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#else /* relies on standard C90 (note : clock_t measurements can be wrong when using multi-threading) */
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typedef clock_t UTIL_time_t;
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#define UTIL_TIME_INITIALIZER 0
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#endif
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UTIL_time_t UTIL_getTime(void);
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PTime UTIL_getSpanTimeMicro(UTIL_time_t clockStart, UTIL_time_t clockEnd);
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PTime UTIL_getSpanTimeNano(UTIL_time_t clockStart, UTIL_time_t clockEnd);
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#define SEC_TO_MICRO ((PTime)1000000)
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PTime UTIL_clockSpanMicro(UTIL_time_t clockStart);
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PTime UTIL_clockSpanNano(UTIL_time_t clockStart);
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void UTIL_waitForNextTick(void);
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#if defined (__cplusplus)
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}
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#endif
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#endif /* TIME_FN_H_MODULE_287987 */
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