1 /* 2 * Copyright (c) 2016-2020, 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) 15 extern "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 # include <stdint.h> 32 typedef uint64_t PTime; /* Precise Time */ 33 #else 34 typedef unsigned long long PTime; /* does not support compilers without long long support */ 35 #endif 36 37 38 39 /*-**************************************** 40 * Time functions 41 ******************************************/ 42 #if defined(_WIN32) /* Windows */ 43 44 #include <windows.h> /* LARGE_INTEGER */ 45 typedef LARGE_INTEGER UTIL_time_t; 46 #define UTIL_TIME_INITIALIZER { { 0, 0 } } 47 48 #elif defined(__APPLE__) && defined(__MACH__) 49 50 #include <mach/mach_time.h> 51 typedef PTime UTIL_time_t; 52 #define UTIL_TIME_INITIALIZER 0 53 54 /* C11 requires timespec_get, but FreeBSD 11 lacks it, while still claiming C11 compliance. 55 Android also lacks it but does define TIME_UTC. */ 56 #elif (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 201112L) /* C11 */) \ 57 && defined(TIME_UTC) && !defined(__ANDROID__) 58 59 typedef struct timespec UTIL_time_t; 60 #define UTIL_TIME_INITIALIZER { 0, 0 } 61 62 #else /* relies on standard C90 (note : clock_t measurements can be wrong when using multi-threading) */ 63 64 typedef clock_t UTIL_time_t; 65 #define UTIL_TIME_INITIALIZER 0 66 67 #endif 68 69 70 UTIL_time_t UTIL_getTime(void); 71 PTime UTIL_getSpanTimeMicro(UTIL_time_t clockStart, UTIL_time_t clockEnd); 72 PTime UTIL_getSpanTimeNano(UTIL_time_t clockStart, UTIL_time_t clockEnd); 73 74 #define SEC_TO_MICRO ((PTime)1000000) 75 PTime UTIL_clockSpanMicro(UTIL_time_t clockStart); 76 PTime UTIL_clockSpanNano(UTIL_time_t clockStart); 77 78 void UTIL_waitForNextTick(void); 79 80 81 #if defined (__cplusplus) 82 } 83 #endif 84 85 #endif /* TIME_FN_H_MODULE_287987 */ 86