1/* 2 * Copyright (c) Yann Collet, Facebook, Inc. 3 * All rights reserved. 4 * 5 * This source code is licensed under both the BSD-style license (found in the 6 * LICENSE file in the root directory of this source tree) and the GPLv2 (found 7 * in the COPYING file in the root directory of this source tree). 8 * You may select, at your option, one of the above-listed licenses. 9 */ 10 11#ifndef TIME_FN_H_MODULE_287987 12#define TIME_FN_H_MODULE_287987 13 14#if defined (__cplusplus) 15extern "C" { 16#endif 17 18 19/*-**************************************** 20* Dependencies 21******************************************/ 22#include <time.h> /* clock_t, clock, CLOCKS_PER_SEC */ 23 24 25 26/*-**************************************** 27* Local Types 28******************************************/ 29 30#if !defined (__VMS) && (defined (__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */) ) 31# if defined(_AIX) 32# include <inttypes.h> 33# else 34# include <stdint.h> /* intptr_t */ 35# endif 36 typedef uint64_t PTime; /* Precise Time */ 37#else 38 typedef unsigned long long PTime; /* does not support compilers without long long support */ 39#endif 40 41 42 43/*-**************************************** 44* Time functions 45******************************************/ 46#if defined(_WIN32) /* Windows */ 47 48 #include <windows.h> /* LARGE_INTEGER */ 49 typedef LARGE_INTEGER UTIL_time_t; 50 #define UTIL_TIME_INITIALIZER { { 0, 0 } } 51 52#elif defined(__APPLE__) && defined(__MACH__) 53 54 #include <mach/mach_time.h> 55 typedef PTime UTIL_time_t; 56 #define UTIL_TIME_INITIALIZER 0 57 58/* C11 requires timespec_get, but FreeBSD 11 lacks it, while still claiming C11 compliance. 59 Android also lacks it but does define TIME_UTC. */ 60#elif (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 201112L) /* C11 */) \ 61 && defined(TIME_UTC) && !defined(__ANDROID__) 62 63 typedef struct timespec UTIL_time_t; 64 #define UTIL_TIME_INITIALIZER { 0, 0 } 65 66#else /* relies on standard C90 (note : clock_t measurements can be wrong when using multi-threading) */ 67 68 typedef clock_t UTIL_time_t; 69 #define UTIL_TIME_INITIALIZER 0 70 71#endif 72 73 74UTIL_time_t UTIL_getTime(void); 75PTime UTIL_getSpanTimeMicro(UTIL_time_t clockStart, UTIL_time_t clockEnd); 76PTime UTIL_getSpanTimeNano(UTIL_time_t clockStart, UTIL_time_t clockEnd); 77 78#define SEC_TO_MICRO ((PTime)1000000) 79PTime UTIL_clockSpanMicro(UTIL_time_t clockStart); 80PTime UTIL_clockSpanNano(UTIL_time_t clockStart); 81 82void UTIL_waitForNextTick(void); 83 84 85#if defined (__cplusplus) 86} 87#endif 88 89#endif /* TIME_FN_H_MODULE_287987 */ 90