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Issue #9079: Added _PyTime_gettimeofday(_PyTime_timeval *tp) to C API
exposed in Python.h. This function is similar to POSIX gettimeofday(struct timeval *tp), but available on platforms without gettimeofday().
1 parent 1c5471f commit 6fc4ade

8 files changed

Lines changed: 150 additions & 85 deletions

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‎Include/Python.h‎

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@@ -61,6 +61,7 @@
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#error "PYMALLOC_DEBUG requires WITH_PYMALLOC"
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#endif
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#include "pymath.h"
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#include "pytime.h"
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#include "pymem.h"
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#include "object.h"

‎Include/pytime.h‎

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#ifndef Py_PYTIME_H
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#define Py_PYTIME_H
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#include "pyconfig.h" /* include for defines */
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/**************************************************************************
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Symbols and macros to supply platform-independent interfaces to time related
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functions and constants
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**************************************************************************/
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifdef HAVE_GETTIMEOFDAY
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typedef struct timeval _PyTime_timeval;
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#else
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typedef struct {
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time_t tv_sec; /* seconds since Jan. 1, 1970 */
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long tv_usec; /* and microseconds */
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} _PyTime_timeval;
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#endif
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/* Similar to POSIX gettimeofday but cannot fail. If system gettimeofday
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* fails or is not available, fall back to lower resolution clocks.
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*/
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PyAPI_FUNC(void) _PyTime_gettimeofday(_PyTime_timeval *tp);
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/* Dummy to force linking. */
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PyAPI_FUNC(void) _PyTime_Init(void);
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#ifdef __cplusplus
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}
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#endif
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#endif /* Py_PYTIME_H */
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#ifndef Py_PYTIME_H
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#define Py_PYTIME_H
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#include "pyconfig.h" /* include for defines */
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/**************************************************************************
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Symbols and macros to supply platform-independent interfaces to time related
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functions and constants
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**************************************************************************/
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifdef HAVE_GETTIMEOFDAY
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typedef struct timeval _PyTime_timeval;
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#else
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typedef struct {
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time_t tv_sec; /* seconds since Jan. 1, 1970 */
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long tv_usec; /* and microseconds */
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} _PyTime_timeval;
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#endif
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/* Similar to POSIX gettimeofday but cannot fail. If system gettimeofday
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* fails or is not available, fall back to lower resolution clocks.
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*/
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PyAPI_FUNC(void) _PyTime_gettimeofday(_PyTime_timeval *tp);
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/* Dummy to force linking. */
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PyAPI_FUNC(void) _PyTime_Init(void);
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#ifdef __cplusplus
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}
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#endif
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#endif /* Py_PYTIME_H */

‎Makefile.pre.in‎

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@@ -314,6 +314,7 @@ PYTHON_OBJS= \
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Python/pymath.o \
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Python/pystate.o \
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Python/pythonrun.o \
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Python/pytime.o \
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Python/structmember.o \
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Python/symtable.o \
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Python/sysmodule.o \
@@ -696,6 +697,7 @@ PYTHON_HEADERS= \
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Include/pystrtod.h \
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Include/pythonrun.h \
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Include/pythread.h \
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Include/pytime.h \
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Include/rangeobject.h \
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Include/setobject.h \
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Include/sliceobject.h \

‎Modules/_datetimemodule.c‎

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@@ -8,7 +8,7 @@
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#include <time.h>
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#include "timefuncs.h"
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#include "_time.h"
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/* Differentiate between building the core module and building extension
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* modules.
@@ -4166,37 +4166,10 @@ datetime_from_timestamp(PyObject *cls, TM_FUNC f, double timestamp,
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static PyObject *
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datetime_best_possible(PyObject *cls, TM_FUNC f, PyObject *tzinfo)
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{
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#ifdef HAVE_GETTIMEOFDAY
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struct timeval t;
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#ifdef GETTIMEOFDAY_NO_TZ
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gettimeofday(&t);
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#else
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gettimeofday(&t, (struct timezone *)NULL);
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#endif
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_PyTime_timeval t;
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_PyTime_gettimeofday(&t);
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return datetime_from_timet_and_us(cls, f, t.tv_sec, (int)t.tv_usec,
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tzinfo);
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#else /* ! HAVE_GETTIMEOFDAY */
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/* No flavor of gettimeofday exists on this platform. Python's
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* time.time() does a lot of other platform tricks to get the
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* best time it can on the platform, and we're not going to do
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* better than that (if we could, the better code would belong
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* in time.time()!) We're limited by the precision of a double,
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* though.
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*/
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PyObject *time;
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double dtime;
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time = time_time();
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if (time == NULL)
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return NULL;
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dtime = PyFloat_AsDouble(time);
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Py_DECREF(time);
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if (dtime == -1.0 && PyErr_Occurred())
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return NULL;
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return datetime_from_timestamp(cls, f, dtime, tzinfo);
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#endif /* ! HAVE_GETTIMEOFDAY */
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}
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/* Return best possible local time -- this isn't constrained by the

‎Modules/timemodule.c‎

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@@ -3,22 +3,10 @@
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#include "Python.h"
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#include "structseq.h"
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#include "timefuncs.h"
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#include "_time.h"
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#define TZNAME_ENCODING "utf-8"
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#ifdef __APPLE__
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#if defined(HAVE_GETTIMEOFDAY) && defined(HAVE_FTIME)
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/*
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* floattime falls back to ftime when getttimeofday fails because the latter
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* might fail on some platforms. This fallback is unwanted on MacOSX because
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* that makes it impossible to use a binary build on OSX 10.4 on earlier
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* releases of the OS. Therefore claim we don't support ftime.
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*/
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# undef HAVE_FTIME
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#endif
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#endif
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#include <ctype.h>
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#ifdef HAVE_SYS_TYPES_H
@@ -29,13 +17,6 @@
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#include <io.h>
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#endif
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#ifdef HAVE_FTIME
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#include <sys/timeb.h>
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#if !defined(MS_WINDOWS) && !defined(PYOS_OS2)
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extern int ftime(struct timeb *);
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#endif /* MS_WINDOWS */
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#endif /* HAVE_FTIME */
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#if defined(__WATCOMC__) && !defined(__QNX__)
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#include <i86.h>
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#else
@@ -946,44 +927,12 @@ PyInit_time(void)
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return m;
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}
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/* Implement floattime() for various platforms */
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static double
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floattime(void)
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{
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/* There are three ways to get the time:
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(1) gettimeofday() -- resolution in microseconds
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(2) ftime() -- resolution in milliseconds
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(3) time() -- resolution in seconds
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In all cases the return value is a float in seconds.
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Since on some systems (e.g. SCO ODT 3.0) gettimeofday() may
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fail, so we fall back on ftime() or time().
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Note: clock resolution does not imply clock accuracy! */
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#ifdef HAVE_GETTIMEOFDAY
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{
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struct timeval t;
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#ifdef GETTIMEOFDAY_NO_TZ
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if (gettimeofday(&t) == 0)
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return (double)t.tv_sec + t.tv_usec*0.000001;
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#else /* !GETTIMEOFDAY_NO_TZ */
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if (gettimeofday(&t, (struct timezone *)NULL) == 0)
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return (double)t.tv_sec + t.tv_usec*0.000001;
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#endif /* !GETTIMEOFDAY_NO_TZ */
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}
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#endif /* !HAVE_GETTIMEOFDAY */
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{
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#if defined(HAVE_FTIME)
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struct timeb t;
979-
ftime(&t);
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return (double)t.time + (double)t.millitm * (double)0.001;
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#else /* !HAVE_FTIME */
982-
time_t secs;
983-
time(&secs);
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return (double)secs;
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#endif /* !HAVE_FTIME */
986-
}
933+
_PyTime_timeval t;
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_PyTime_gettimeofday(&t);
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return (double)t.tv_sec + t.tv_usec*0.000001;
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}
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‎PCbuild/pythoncore.vcproj‎

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RelativePath="..\Include\pymath.h"
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>
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</File>
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<File
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RelativePath="..\Include\pytime.h"
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>
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</File>
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<File
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RelativePath="..\Include\pymem.h"
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>
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RelativePath="..\Python\pymath.c"
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>
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</File>
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<File
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RelativePath="..\Python\pytime.c"
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>
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</File>
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<File
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RelativePath="..\Python\pystate.c"
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>

‎Python/pythonrun.c‎

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/* Initialize _warnings. */
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_PyWarnings_Init();
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_PyTime_Init();
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initfsencoding();
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if (install_sigs)

‎Python/pytime.c‎

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#include "Python.h"
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#ifdef __APPLE__
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#if defined(HAVE_GETTIMEOFDAY) && defined(HAVE_FTIME)
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/*
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* _PyTime_gettimeofday falls back to ftime when getttimeofday fails because the latter
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* might fail on some platforms. This fallback is unwanted on MacOSX because
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* that makes it impossible to use a binary build on OSX 10.4 on earlier
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* releases of the OS. Therefore claim we don't support ftime.
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*/
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# undef HAVE_FTIME
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#endif
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#endif
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#ifdef HAVE_FTIME
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#include <sys/timeb.h>
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#if !defined(MS_WINDOWS) && !defined(PYOS_OS2)
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extern int ftime(struct timeb *);
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#endif /* MS_WINDOWS */
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#endif /* HAVE_FTIME */
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void
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_PyTime_gettimeofday(_PyTime_timeval *tp)
24+
{
25+
/* There are three ways to get the time:
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(1) gettimeofday() -- resolution in microseconds
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(2) ftime() -- resolution in milliseconds
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(3) time() -- resolution in seconds
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In all cases the return value in a timeval struct.
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Since on some systems (e.g. SCO ODT 3.0) gettimeofday() may
31+
fail, so we fall back on ftime() or time().
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Note: clock resolution does not imply clock accuracy! */
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#ifdef HAVE_GETTIMEOFDAY
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#ifdef GETTIMEOFDAY_NO_TZ
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if (gettimeofday(tp) == 0)
36+
return;
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#else /* !GETTIMEOFDAY_NO_TZ */
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if (gettimeofday(tp, (struct timezone *)NULL) == 0)
39+
return;
40+
#endif /* !GETTIMEOFDAY_NO_TZ */
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#endif /* !HAVE_GETTIMEOFDAY */
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#if defined(HAVE_FTIME)
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{
44+
struct timeb t;
45+
ftime(&t);
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tp->tv_sec = t.time;
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tp->tv_usec = t.millitm * 1000;
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}
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#else /* !HAVE_FTIME */
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tp->tv_sec = time(NULL);
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tp->tv_usec = 0;
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#endif /* !HAVE_FTIME */
53+
return;
54+
}
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void
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_PyTime_Init()
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{
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/* Do nothing. Needed to force linking. */
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}

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