generic-library/curl
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

fallback to gettimeofday when monotonic clock is unavailable at run-time

Browse Source
This commit is contained in:
Yang Tse
2008-07-02 03:04:56 +00:00
parent 400d9d4205
commit 97333deb3f
8 changed files with 60 additions and 55 deletions
Download Patch File Download Diff File Expand all files Collapse all files

30
acinclude.m4
View File

@@ -1979,16 +1979,13 @@ dnl Check if monotonic clock_gettime is available.
AC_DEFUN([CURL_CHECK_FUNC_CLOCK_GETTIME_MONOTONIC], [
AC_REQUIRE([AC_HEADER_TIME])dnl
AC_CHECK_HEADERS(sys/types.h unistd.h sys/time.h time.h)
AC_MSG_CHECKING([for POSIX always supported monotonic clock_gettime])
AC_CHECK_HEADERS(sys/types.h sys/time.h time.h)
AC_MSG_CHECKING([for monotonic clock_gettime])
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM([[
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#ifdef TIME_WITH_SYS_TIME
@@ -2000,16 +1997,8 @@ AC_DEFUN([CURL_CHECK_FUNC_CLOCK_GETTIME_MONOTONIC], [
#endif
#endif
]],[[
#if defined(_POSIX_MONOTONIC_CLOCK) && (_POSIX_MONOTONIC_CLOCK > 0)
/*
The monotonic clock will not be used unless the feature test macro is
defined with a value greater than zero indicating _always_ supported.
*/
struct timespec ts;
(void)clock_gettime(CLOCK_MONOTONIC, &ts);
#else
HAVE_CLOCK_GETTIME_MONOTONIC shall not be defined.
#endif
]])
],[
AC_MSG_RESULT([yes])
@@ -2018,8 +2007,8 @@ AC_DEFUN([CURL_CHECK_FUNC_CLOCK_GETTIME_MONOTONIC], [
AC_MSG_RESULT([no])
ac_cv_func_clock_gettime="no"
])
dnl Definition of HAVE_CLOCK_GETTIME_MONOTONIC is intentionally
dnl postponed until library linking checks for clock_gettime pass.
dnl Definition of HAVE_CLOCK_GETTIME_MONOTONIC is intentionally postponed
dnl until library linking and run-time checks for clock_gettime succeed.
]) dnl AC_DEFUN
@@ -2050,9 +2039,6 @@ AC_DEFUN([CURL_CHECK_LIBS_CLOCK_GETTIME_MONOTONIC], [
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#ifdef TIME_WITH_SYS_TIME
@@ -2105,9 +2091,6 @@ AC_DEFUN([CURL_CHECK_LIBS_CLOCK_GETTIME_MONOTONIC], [
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#ifdef TIME_WITH_SYS_TIME
@@ -2119,12 +2102,11 @@ AC_DEFUN([CURL_CHECK_LIBS_CLOCK_GETTIME_MONOTONIC], [
#endif
#endif
]],[[
#if defined(_POSIX_MONOTONIC_CLOCK) && (_POSIX_MONOTONIC_CLOCK > 0)
struct timespec ts;
if (0 == clock_gettime(CLOCK_MONOTONIC, &ts))
exit(0);
#endif
exit(1);
else
exit(1);
]])
],[
AC_MSG_RESULT([yes])