FreeBSD/Linux Kernel Cross Reference
sys/contrib/zstd/programs/timefn.h

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

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