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Annotation of embedaddon/curl/tests/libtest/testutil.c, revision 1.1

1.1     ! misho       1: /***************************************************************************
        !             2:  *                                  _   _ ____  _
        !             3:  *  Project                     ___| | | |  _ \| |
        !             4:  *                             / __| | | | |_) | |
        !             5:  *                            | (__| |_| |  _ <| |___
        !             6:  *                             \___|\___/|_| \_\_____|
        !             7:  *
        !             8:  * Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al.
        !             9:  *
        !            10:  * This software is licensed as described in the file COPYING, which
        !            11:  * you should have received as part of this distribution. The terms
        !            12:  * are also available at https://curl.haxx.se/docs/copyright.html.
        !            13:  *
        !            14:  * You may opt to use, copy, modify, merge, publish, distribute and/or sell
        !            15:  * copies of the Software, and permit persons to whom the Software is
        !            16:  * furnished to do so, under the terms of the COPYING file.
        !            17:  *
        !            18:  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
        !            19:  * KIND, either express or implied.
        !            20:  *
        !            21:  ***************************************************************************/
        !            22: #include "curl_setup.h"
        !            23: #include <curl/curl.h>
        !            24: #include "testutil.h"
        !            25: #include "memdebug.h"
        !            26: 
        !            27: #if defined(WIN32) && !defined(MSDOS)
        !            28: 
        !            29: struct timeval tutil_tvnow(void)
        !            30: {
        !            31:   /*
        !            32:   ** GetTickCount() is available on _all_ Windows versions from W95 up
        !            33:   ** to nowadays. Returns milliseconds elapsed since last system boot,
        !            34:   ** increases monotonically and wraps once 49.7 days have elapsed.
        !            35:   */
        !            36:   struct timeval now;
        !            37:   DWORD milliseconds = GetTickCount();
        !            38:   now.tv_sec = milliseconds / 1000;
        !            39:   now.tv_usec = (milliseconds % 1000) * 1000;
        !            40:   return now;
        !            41: }
        !            42: 
        !            43: #elif defined(HAVE_CLOCK_GETTIME_MONOTONIC)
        !            44: 
        !            45: struct timeval tutil_tvnow(void)
        !            46: {
        !            47:   /*
        !            48:   ** clock_gettime() is granted to be increased monotonically when the
        !            49:   ** monotonic clock is queried. Time starting point is unspecified, it
        !            50:   ** could be the system start-up time, the Epoch, or something else,
        !            51:   ** in any case the time starting point does not change once that the
        !            52:   ** system has started up.
        !            53:   */
        !            54:   struct timeval now;
        !            55:   struct timespec tsnow;
        !            56:   if(0 == clock_gettime(CLOCK_MONOTONIC, &tsnow)) {
        !            57:     now.tv_sec = tsnow.tv_sec;
        !            58:     now.tv_usec = tsnow.tv_nsec / 1000;
        !            59:   }
        !            60:   /*
        !            61:   ** Even when the configure process has truly detected monotonic clock
        !            62:   ** availability, it might happen that it is not actually available at
        !            63:   ** run-time. When this occurs simply fallback to other time source.
        !            64:   */
        !            65: #ifdef HAVE_GETTIMEOFDAY
        !            66:   else
        !            67:     (void)gettimeofday(&now, NULL);
        !            68: #else
        !            69:   else {
        !            70:     now.tv_sec = (long)time(NULL);
        !            71:     now.tv_usec = 0;
        !            72:   }
        !            73: #endif
        !            74:   return now;
        !            75: }
        !            76: 
        !            77: #elif defined(HAVE_GETTIMEOFDAY)
        !            78: 
        !            79: struct timeval tutil_tvnow(void)
        !            80: {
        !            81:   /*
        !            82:   ** gettimeofday() is not granted to be increased monotonically, due to
        !            83:   ** clock drifting and external source time synchronization it can jump
        !            84:   ** forward or backward in time.
        !            85:   */
        !            86:   struct timeval now;
        !            87:   (void)gettimeofday(&now, NULL);
        !            88:   return now;
        !            89: }
        !            90: 
        !            91: #else
        !            92: 
        !            93: struct timeval tutil_tvnow(void)
        !            94: {
        !            95:   /*
        !            96:   ** time() returns the value of time in seconds since the Epoch.
        !            97:   */
        !            98:   struct timeval now;
        !            99:   now.tv_sec = (long)time(NULL);
        !           100:   now.tv_usec = 0;
        !           101:   return now;
        !           102: }
        !           103: 
        !           104: #endif
        !           105: 
        !           106: /*
        !           107:  * Make sure that the first argument is the more recent time, as otherwise
        !           108:  * we'll get a weird negative time-diff back...
        !           109:  *
        !           110:  * Returns: the time difference in number of milliseconds.
        !           111:  */
        !           112: long tutil_tvdiff(struct timeval newer, struct timeval older)
        !           113: {
        !           114:   return (long)(newer.tv_sec-older.tv_sec)*1000+
        !           115:     (long)(newer.tv_usec-older.tv_usec)/1000;
        !           116: }
        !           117: 
        !           118: 
        !           119: /*
        !           120:  * Same as tutil_tvdiff but with full usec resolution.
        !           121:  *
        !           122:  * Returns: the time difference in seconds with subsecond resolution.
        !           123:  */
        !           124: double tutil_tvdiff_secs(struct timeval newer, struct timeval older)
        !           125: {
        !           126:   if(newer.tv_sec != older.tv_sec)
        !           127:     return (double)(newer.tv_sec-older.tv_sec)+
        !           128:       (double)(newer.tv_usec-older.tv_usec)/1000000.0;
        !           129:   return (double)(newer.tv_usec-older.tv_usec)/1000000.0;
        !           130: }