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timeval: fix use of weak symbol clock_gettime() on Apple platforms

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Closes #3048
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dmitrykos 2018-09-25 20:06:26 +03:00 committed by Daniel Stenberg
parent 7f00146d00
commit 0b19ef13b4
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1 changed files with 18 additions and 2 deletions
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20
lib/timeval.c
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@ -5,7 +5,7 @@
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
* Copyright (C) 1998 - 2018, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
@ -60,7 +60,23 @@ struct curltime Curl_now(void)
struct timeval now;
struct curltime cnow;
struct timespec tsnow;
if(0 == clock_gettime(CLOCK_MONOTONIC, &tsnow)) {
/*
** clock_gettime() may be defined by Apple's SDK as weak symbol thus
** code compiles but fails during run-time if clock_gettime() is
** called on unsupported OS version.
*/
#if defined(__APPLE__) && (HAVE_BUILTIN_AVAILABLE == 1)
bool have_clock_gettime = FALSE;
if(__builtin_available(macOS 10.12, iOS 10, tvOS 10, watchOS 3, *))
have_clock_gettime = TRUE;
#endif
if(
#if defined(__APPLE__) && (HAVE_BUILTIN_AVAILABLE == 1)
have_clock_gettime &&
#endif
(0 == clock_gettime(CLOCK_MONOTONIC, &tsnow))) {
cnow.tv_sec = tsnow.tv_sec;
cnow.tv_usec = (unsigned int)(tsnow.tv_nsec / 1000);
}