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Issue #9079: Added _PyTime_gettimeofday(_PyTime_timeval *tp) to C API

Browse source 
exposed in Python.h.  This function is similar to POSIX
gettimeofday(struct timeval *tp), but available on platforms without
gettimeofday().
This commit is contained in:
Alexander Belopolsky 2010-08-05 17:34:27 +00:00
parent 1c5471f319
commit 6fc4ade2bb
8 changed files with 150 additions and 85 deletions
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2
Python/pythonrun.c
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@ -268,6 +268,8 @@ Py_InitializeEx(int install_sigs)
/* Initialize _warnings. */
_PyWarnings_Init();
_PyTime_Init();
initfsencoding();
if (install_sigs)

60
Python/pytime.c Normal file
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@ -0,0 +1,60 @@
#include "Python.h"
#ifdef __APPLE__
#if defined(HAVE_GETTIMEOFDAY) && defined(HAVE_FTIME)
/*
* _PyTime_gettimeofday falls back to ftime when getttimeofday fails because the latter
* might fail on some platforms. This fallback is unwanted on MacOSX because
* that makes it impossible to use a binary build on OSX 10.4 on earlier
* releases of the OS. Therefore claim we don't support ftime.
*/
# undef HAVE_FTIME
#endif
#endif
#ifdef HAVE_FTIME
#include <sys/timeb.h>
#if !defined(MS_WINDOWS) && !defined(PYOS_OS2)
extern int ftime(struct timeb *);
#endif /* MS_WINDOWS */
#endif /* HAVE_FTIME */
void
_PyTime_gettimeofday(_PyTime_timeval *tp)
{
/* There are three ways to get the time:
(1) gettimeofday() -- resolution in microseconds
(2) ftime() -- resolution in milliseconds
(3) time() -- resolution in seconds
In all cases the return value in a timeval struct.
Since on some systems (e.g. SCO ODT 3.0) gettimeofday() may
fail, so we fall back on ftime() or time().
Note: clock resolution does not imply clock accuracy! */
#ifdef HAVE_GETTIMEOFDAY
#ifdef GETTIMEOFDAY_NO_TZ
if (gettimeofday(tp) == 0)
return;
#else /* !GETTIMEOFDAY_NO_TZ */
if (gettimeofday(tp, (struct timezone *)NULL) == 0)
return;
#endif /* !GETTIMEOFDAY_NO_TZ */
#endif /* !HAVE_GETTIMEOFDAY */
#if defined(HAVE_FTIME)
{
struct timeb t;
ftime(&t);
tp->tv_sec = t.time;
tp->tv_usec = t.millitm * 1000;
}
#else /* !HAVE_FTIME */
tp->tv_sec = time(NULL);
tp->tv_usec = 0;
#endif /* !HAVE_FTIME */
return;
}
void
_PyTime_Init()
{
/* Do nothing. Needed to force linking. */
}