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) 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 # 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 74 UTIL_time_t UTIL_getTime(void); 75 PTime UTIL_getSpanTimeMicro(UTIL_time_t clockStart, UTIL_time_t clockEnd); 76 PTime UTIL_getSpanTimeNano(UTIL_time_t clockStart, UTIL_time_t clockEnd); 77 78 #define SEC_TO_MICRO ((PTime)1000000) 79 PTime UTIL_clockSpanMicro(UTIL_time_t clockStart); 80 PTime UTIL_clockSpanNano(UTIL_time_t clockStart); 81 82 void UTIL_waitForNextTick(void); 83 84 85 #if defined (__cplusplus) 86 } 87 #endif 88 89 #endif /* TIME_FN_H_MODULE_287987 */ 90