ceph/src/zstd/programs/timefn.h

   1 /*
   2  * Copyright (c) 2016-present, 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 <sys/types.h>    /* utime */
  23 #if defined(_MSC_VER)
  24 #  include <sys/utime.h>  /* utime */
  25 #else
  26 #  include <utime.h>      /* utime */
  27 #endif
  28 #include <time.h>         /* clock_t, clock, CLOCKS_PER_SEC */
  29
  30
  31
  32 /*-****************************************
  33 *  Local Types
  34 ******************************************/
  35
  36 #if !defined (__VMS) && (defined (__cplusplus) || (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) /* C99 */) )
  37 # include <stdint.h>
  38   typedef uint64_t           PTime;  /* Precise Time */
  39 #else
  40   typedef unsigned long long PTime;  /* does not support compilers without long long support */
  41 #endif
  42
  43
  44
  45 /*-****************************************
  46 *  Time functions
  47 ******************************************/
  48 #if defined(_WIN32)   /* Windows */
  49
  50     #include <Windows.h>   /* LARGE_INTEGER */
  51     typedef LARGE_INTEGER UTIL_time_t;
  52     #define UTIL_TIME_INITIALIZER { { 0, 0 } }
  53
  54 #elif defined(__APPLE__) && defined(__MACH__)
  55
  56     #include <mach/mach_time.h>
  57     typedef PTime UTIL_time_t;
  58     #define UTIL_TIME_INITIALIZER 0
  59
  60 #elif (defined (__STDC_VERSION__) && (__STDC_VERSION__ >= 201112L) /* C11 */) \
  61     && defined(TIME_UTC) /* C11 requires timespec_get, but FreeBSD 11 lacks it, while still claiming C11 compliance */
  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 */