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timeval: use mach time on MacOS

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If clock_gettime() is not supported, use mach_absolute_time() on MacOS.

closes #2033
This commit is contained in:
Dmitri Tikhonov 2017-10-30 08:12:41 -04:00 committed by Daniel Stenberg
parent e240a546a7
commit d531f33ba2
4 changed files with 36 additions and 0 deletions
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1
CMakeLists.txt
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@ -878,6 +878,7 @@ check_symbol_exists(setrlimit "${CURL_INCLUDES}" HAVE_SETRLIMIT)
check_symbol_exists(fcntl "${CURL_INCLUDES}" HAVE_FCNTL)
check_symbol_exists(ioctl "${CURL_INCLUDES}" HAVE_IOCTL)
check_symbol_exists(setsockopt "${CURL_INCLUDES}" HAVE_SETSOCKOPT)
check_function_exists(mach_absolute_time HAVE_MACH_ABSOLUTE_TIME)
# symbol exists in win32, but function does not.
if(WIN32)

1
configure.ac
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@ -3385,6 +3385,7 @@ AC_CHECK_FUNCS([geteuid \
getrlimit \
gettimeofday \
if_nametoindex \
mach_absolute_time \
pipe \
setlocale \
setmode \

3
lib/curl_config.h.cmake
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@ -1000,3 +1000,6 @@
/* the signed version of size_t */
#cmakedefine ssize_t ${ssize_t}
/* Define to 1 if you have the mach_absolute_time function. */
#cmakedefine HAVE_MACH_ABSOLUTE_TIME 1

31
lib/timeval.c
View File

@ -84,6 +84,37 @@ struct curltime Curl_now(void)
return cnow;
}
#elif defined(HAVE_MACH_ABSOLUTE_TIME)
#include <stdint.h>
#include <mach/mach_time.h>
struct curltime Curl_now(void)
{
/*
** Monotonic timer on Mac OS is provided by mach_absolute_time(), which
** returns time in Mach "absolute time units," which are platform-dependent.
** To convert to nanoseconds, one must use conversion factors specified by
** mach_timebase_info().
*/
static mach_timebase_info_data_t timebase;
struct curltime cnow;
uint64_t usecs;
if(0 == timebase.denom)
(void) mach_timebase_info(&timebase);
usecs = mach_absolute_time();
usecs *= timebase.numer;
usecs /= timebase.denom;
usecs /= 1000;
cnow.tv_sec = usecs / 1000000;
cnow.tv_usec = usecs % 1000000;
return cnow;
}
#elif defined(HAVE_GETTIMEOFDAY)
struct curltime Curl_now(void)