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Annotation of embedaddon/curl/tests/libtest/testutil.c, revision 1.1.1.1

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: }