781 lines
18 KiB
C
781 lines
18 KiB
C
#include "Python.h"
|
|
#ifdef MS_WINDOWS
|
|
#include <windows.h>
|
|
#endif
|
|
|
|
#if defined(__APPLE__)
|
|
#include <mach/mach_time.h> /* mach_absolute_time(), mach_timebase_info() */
|
|
#endif
|
|
|
|
#define _PyTime_check_mul_overflow(a, b) \
|
|
(assert(b > 0), \
|
|
(_PyTime_t)(a) < _PyTime_MIN / (_PyTime_t)(b) \
|
|
|| _PyTime_MAX / (_PyTime_t)(b) < (_PyTime_t)(a))
|
|
|
|
/* To millisecond (10^-3) */
|
|
#define SEC_TO_MS 1000
|
|
|
|
/* To microseconds (10^-6) */
|
|
#define MS_TO_US 1000
|
|
#define SEC_TO_US (SEC_TO_MS * MS_TO_US)
|
|
|
|
/* To nanoseconds (10^-9) */
|
|
#define US_TO_NS 1000
|
|
#define MS_TO_NS (MS_TO_US * US_TO_NS)
|
|
#define SEC_TO_NS (SEC_TO_MS * MS_TO_NS)
|
|
|
|
/* Conversion from nanoseconds */
|
|
#define NS_TO_MS (1000 * 1000)
|
|
#define NS_TO_US (1000)
|
|
|
|
static void
|
|
error_time_t_overflow(void)
|
|
{
|
|
PyErr_SetString(PyExc_OverflowError,
|
|
"timestamp out of range for platform time_t");
|
|
}
|
|
|
|
time_t
|
|
_PyLong_AsTime_t(PyObject *obj)
|
|
{
|
|
#if defined(HAVE_LONG_LONG) && SIZEOF_TIME_T == SIZEOF_LONG_LONG
|
|
PY_LONG_LONG val;
|
|
val = PyLong_AsLongLong(obj);
|
|
#else
|
|
long val;
|
|
assert(sizeof(time_t) <= sizeof(long));
|
|
val = PyLong_AsLong(obj);
|
|
#endif
|
|
if (val == -1 && PyErr_Occurred()) {
|
|
if (PyErr_ExceptionMatches(PyExc_OverflowError))
|
|
error_time_t_overflow();
|
|
return -1;
|
|
}
|
|
return (time_t)val;
|
|
}
|
|
|
|
PyObject *
|
|
_PyLong_FromTime_t(time_t t)
|
|
{
|
|
#if defined(HAVE_LONG_LONG) && SIZEOF_TIME_T == SIZEOF_LONG_LONG
|
|
return PyLong_FromLongLong((PY_LONG_LONG)t);
|
|
#else
|
|
assert(sizeof(time_t) <= sizeof(long));
|
|
return PyLong_FromLong((long)t);
|
|
#endif
|
|
}
|
|
|
|
/* Round to nearest with ties going to nearest even integer
|
|
(_PyTime_ROUND_HALF_EVEN) */
|
|
static double
|
|
_PyTime_RoundHalfEven(double x)
|
|
{
|
|
double rounded = round(x);
|
|
if (fabs(x-rounded) == 0.5)
|
|
/* halfway case: round to even */
|
|
rounded = 2.0*round(x/2.0);
|
|
return rounded;
|
|
}
|
|
|
|
static double
|
|
_PyTime_Round(double x, _PyTime_round_t round)
|
|
{
|
|
/* volatile avoids optimization changing how numbers are rounded */
|
|
volatile double d;
|
|
|
|
d = x;
|
|
if (round == _PyTime_ROUND_HALF_EVEN)
|
|
d = _PyTime_RoundHalfEven(d);
|
|
else if (round == _PyTime_ROUND_CEILING)
|
|
d = ceil(d);
|
|
else
|
|
d = floor(d);
|
|
return d;
|
|
}
|
|
|
|
static int
|
|
_PyTime_DoubleToDenominator(double d, time_t *sec, long *numerator,
|
|
double denominator, _PyTime_round_t round)
|
|
{
|
|
double intpart, err;
|
|
/* volatile avoids optimization changing how numbers are rounded */
|
|
volatile double floatpart;
|
|
|
|
floatpart = modf(d, &intpart);
|
|
|
|
floatpart *= denominator;
|
|
floatpart = _PyTime_Round(floatpart, round);
|
|
if (floatpart >= denominator) {
|
|
floatpart -= denominator;
|
|
intpart += 1.0;
|
|
}
|
|
else if (floatpart < 0) {
|
|
floatpart += denominator;
|
|
intpart -= 1.0;
|
|
}
|
|
assert(0.0 <= floatpart && floatpart < denominator);
|
|
|
|
*sec = (time_t)intpart;
|
|
*numerator = (long)floatpart;
|
|
|
|
err = intpart - (double)*sec;
|
|
if (err <= -1.0 || err >= 1.0) {
|
|
error_time_t_overflow();
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
_PyTime_ObjectToDenominator(PyObject *obj, time_t *sec, long *numerator,
|
|
double denominator, _PyTime_round_t round)
|
|
{
|
|
assert(denominator <= (double)LONG_MAX);
|
|
|
|
if (PyFloat_Check(obj)) {
|
|
double d = PyFloat_AsDouble(obj);
|
|
return _PyTime_DoubleToDenominator(d, sec, numerator,
|
|
denominator, round);
|
|
}
|
|
else {
|
|
*sec = _PyLong_AsTime_t(obj);
|
|
*numerator = 0;
|
|
if (*sec == (time_t)-1 && PyErr_Occurred())
|
|
return -1;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
int
|
|
_PyTime_ObjectToTime_t(PyObject *obj, time_t *sec, _PyTime_round_t round)
|
|
{
|
|
if (PyFloat_Check(obj)) {
|
|
double intpart, err;
|
|
/* volatile avoids optimization changing how numbers are rounded */
|
|
volatile double d;
|
|
|
|
d = PyFloat_AsDouble(obj);
|
|
d = _PyTime_Round(d, round);
|
|
(void)modf(d, &intpart);
|
|
|
|
*sec = (time_t)intpart;
|
|
err = intpart - (double)*sec;
|
|
if (err <= -1.0 || err >= 1.0) {
|
|
error_time_t_overflow();
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
else {
|
|
*sec = _PyLong_AsTime_t(obj);
|
|
if (*sec == (time_t)-1 && PyErr_Occurred())
|
|
return -1;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
int
|
|
_PyTime_ObjectToTimespec(PyObject *obj, time_t *sec, long *nsec,
|
|
_PyTime_round_t round)
|
|
{
|
|
int res;
|
|
res = _PyTime_ObjectToDenominator(obj, sec, nsec, 1e9, round);
|
|
assert(0 <= *nsec && *nsec < SEC_TO_NS);
|
|
return res;
|
|
}
|
|
|
|
int
|
|
_PyTime_ObjectToTimeval(PyObject *obj, time_t *sec, long *usec,
|
|
_PyTime_round_t round)
|
|
{
|
|
int res;
|
|
res = _PyTime_ObjectToDenominator(obj, sec, usec, 1e6, round);
|
|
assert(0 <= *usec && *usec < SEC_TO_US);
|
|
return res;
|
|
}
|
|
|
|
static void
|
|
_PyTime_overflow(void)
|
|
{
|
|
PyErr_SetString(PyExc_OverflowError,
|
|
"timestamp too large to convert to C _PyTime_t");
|
|
}
|
|
|
|
_PyTime_t
|
|
_PyTime_FromSeconds(int seconds)
|
|
{
|
|
_PyTime_t t;
|
|
t = (_PyTime_t)seconds;
|
|
/* ensure that integer overflow cannot happen, int type should have 32
|
|
bits, whereas _PyTime_t type has at least 64 bits (SEC_TO_MS takes 30
|
|
bits). */
|
|
assert((t >= 0 && t <= _PyTime_MAX / SEC_TO_NS)
|
|
|| (t < 0 && t >= _PyTime_MIN / SEC_TO_NS));
|
|
t *= SEC_TO_NS;
|
|
return t;
|
|
}
|
|
|
|
_PyTime_t
|
|
_PyTime_FromNanoseconds(PY_LONG_LONG ns)
|
|
{
|
|
_PyTime_t t;
|
|
assert(sizeof(PY_LONG_LONG) <= sizeof(_PyTime_t));
|
|
t = Py_SAFE_DOWNCAST(ns, PY_LONG_LONG, _PyTime_t);
|
|
return t;
|
|
}
|
|
|
|
#ifdef HAVE_CLOCK_GETTIME
|
|
static int
|
|
_PyTime_FromTimespec(_PyTime_t *tp, struct timespec *ts, int raise)
|
|
{
|
|
_PyTime_t t;
|
|
int res = 0;
|
|
|
|
assert(sizeof(ts->tv_sec) <= sizeof(_PyTime_t));
|
|
t = (_PyTime_t)ts->tv_sec;
|
|
|
|
if (_PyTime_check_mul_overflow(t, SEC_TO_NS)) {
|
|
if (raise)
|
|
_PyTime_overflow();
|
|
res = -1;
|
|
}
|
|
t = t * SEC_TO_NS;
|
|
|
|
t += ts->tv_nsec;
|
|
|
|
*tp = t;
|
|
return res;
|
|
}
|
|
#elif !defined(MS_WINDOWS)
|
|
static int
|
|
_PyTime_FromTimeval(_PyTime_t *tp, struct timeval *tv, int raise)
|
|
{
|
|
_PyTime_t t;
|
|
int res = 0;
|
|
|
|
assert(sizeof(tv->tv_sec) <= sizeof(_PyTime_t));
|
|
t = (_PyTime_t)tv->tv_sec;
|
|
|
|
if (_PyTime_check_mul_overflow(t, SEC_TO_NS)) {
|
|
if (raise)
|
|
_PyTime_overflow();
|
|
res = -1;
|
|
}
|
|
t = t * SEC_TO_NS;
|
|
|
|
t += (_PyTime_t)tv->tv_usec * US_TO_NS;
|
|
|
|
*tp = t;
|
|
return res;
|
|
}
|
|
#endif
|
|
|
|
static int
|
|
_PyTime_FromFloatObject(_PyTime_t *t, double value, _PyTime_round_t round,
|
|
long unit_to_ns)
|
|
{
|
|
double err;
|
|
/* volatile avoids optimization changing how numbers are rounded */
|
|
volatile double d;
|
|
|
|
/* convert to a number of nanoseconds */
|
|
d = value;
|
|
d *= (double)unit_to_ns;
|
|
d = _PyTime_Round(d, round);
|
|
|
|
*t = (_PyTime_t)d;
|
|
err = d - (double)*t;
|
|
if (fabs(err) >= 1.0) {
|
|
_PyTime_overflow();
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
_PyTime_FromObject(_PyTime_t *t, PyObject *obj, _PyTime_round_t round,
|
|
long unit_to_ns)
|
|
{
|
|
if (PyFloat_Check(obj)) {
|
|
double d;
|
|
d = PyFloat_AsDouble(obj);
|
|
return _PyTime_FromFloatObject(t, d, round, unit_to_ns);
|
|
}
|
|
else {
|
|
#ifdef HAVE_LONG_LONG
|
|
PY_LONG_LONG sec;
|
|
assert(sizeof(PY_LONG_LONG) <= sizeof(_PyTime_t));
|
|
|
|
sec = PyLong_AsLongLong(obj);
|
|
#else
|
|
long sec;
|
|
assert(sizeof(PY_LONG_LONG) <= sizeof(_PyTime_t));
|
|
|
|
sec = PyLong_AsLong(obj);
|
|
#endif
|
|
if (sec == -1 && PyErr_Occurred()) {
|
|
if (PyErr_ExceptionMatches(PyExc_OverflowError))
|
|
_PyTime_overflow();
|
|
return -1;
|
|
}
|
|
|
|
if (_PyTime_check_mul_overflow(sec, unit_to_ns)) {
|
|
_PyTime_overflow();
|
|
return -1;
|
|
}
|
|
*t = sec * unit_to_ns;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
int
|
|
_PyTime_FromSecondsObject(_PyTime_t *t, PyObject *obj, _PyTime_round_t round)
|
|
{
|
|
return _PyTime_FromObject(t, obj, round, SEC_TO_NS);
|
|
}
|
|
|
|
int
|
|
_PyTime_FromMillisecondsObject(_PyTime_t *t, PyObject *obj, _PyTime_round_t round)
|
|
{
|
|
return _PyTime_FromObject(t, obj, round, MS_TO_NS);
|
|
}
|
|
|
|
double
|
|
_PyTime_AsSecondsDouble(_PyTime_t t)
|
|
{
|
|
/* volatile avoids optimization changing how numbers are rounded */
|
|
volatile double d;
|
|
|
|
if (t % SEC_TO_NS == 0) {
|
|
_PyTime_t secs;
|
|
/* Divide using integers to avoid rounding issues on the integer part.
|
|
1e-9 cannot be stored exactly in IEEE 64-bit. */
|
|
secs = t / SEC_TO_NS;
|
|
d = (double)secs;
|
|
}
|
|
else {
|
|
d = (double)t;
|
|
d /= 1e9;
|
|
}
|
|
return d;
|
|
}
|
|
|
|
PyObject *
|
|
_PyTime_AsNanosecondsObject(_PyTime_t t)
|
|
{
|
|
#ifdef HAVE_LONG_LONG
|
|
assert(sizeof(PY_LONG_LONG) >= sizeof(_PyTime_t));
|
|
return PyLong_FromLongLong((PY_LONG_LONG)t);
|
|
#else
|
|
assert(sizeof(long) >= sizeof(_PyTime_t));
|
|
return PyLong_FromLong((long)t);
|
|
#endif
|
|
}
|
|
|
|
static _PyTime_t
|
|
_PyTime_Divide(const _PyTime_t t, const _PyTime_t k,
|
|
const _PyTime_round_t round)
|
|
{
|
|
assert(k > 1);
|
|
if (round == _PyTime_ROUND_HALF_EVEN) {
|
|
_PyTime_t x, r, abs_r;
|
|
x = t / k;
|
|
r = t % k;
|
|
abs_r = Py_ABS(r);
|
|
if (abs_r > k / 2 || (abs_r == k / 2 && (Py_ABS(x) & 1))) {
|
|
if (t >= 0)
|
|
x++;
|
|
else
|
|
x--;
|
|
}
|
|
return x;
|
|
}
|
|
else if (round == _PyTime_ROUND_CEILING) {
|
|
if (t >= 0)
|
|
return (t + k - 1) / k;
|
|
else
|
|
return t / k;
|
|
}
|
|
else {
|
|
if (t >= 0)
|
|
return t / k;
|
|
else
|
|
return (t - (k - 1)) / k;
|
|
}
|
|
}
|
|
|
|
_PyTime_t
|
|
_PyTime_AsMilliseconds(_PyTime_t t, _PyTime_round_t round)
|
|
{
|
|
return _PyTime_Divide(t, NS_TO_MS, round);
|
|
}
|
|
|
|
_PyTime_t
|
|
_PyTime_AsMicroseconds(_PyTime_t t, _PyTime_round_t round)
|
|
{
|
|
return _PyTime_Divide(t, NS_TO_US, round);
|
|
}
|
|
|
|
static int
|
|
_PyTime_AsTimeval_impl(_PyTime_t t, _PyTime_t *p_secs, int *p_us,
|
|
_PyTime_round_t round)
|
|
{
|
|
_PyTime_t secs, ns;
|
|
int usec;
|
|
int res = 0;
|
|
|
|
secs = t / SEC_TO_NS;
|
|
ns = t % SEC_TO_NS;
|
|
|
|
usec = (int)_PyTime_Divide(ns, US_TO_NS, round);
|
|
if (usec < 0) {
|
|
usec += SEC_TO_US;
|
|
if (secs != _PyTime_MIN)
|
|
secs -= 1;
|
|
else
|
|
res = -1;
|
|
}
|
|
else if (usec >= SEC_TO_US) {
|
|
usec -= SEC_TO_US;
|
|
if (secs != _PyTime_MAX)
|
|
secs += 1;
|
|
else
|
|
res = -1;
|
|
}
|
|
assert(0 <= usec && usec < SEC_TO_US);
|
|
|
|
*p_secs = secs;
|
|
*p_us = usec;
|
|
|
|
return res;
|
|
}
|
|
|
|
static int
|
|
_PyTime_AsTimevalStruct_impl(_PyTime_t t, struct timeval *tv,
|
|
_PyTime_round_t round, int raise)
|
|
{
|
|
_PyTime_t secs;
|
|
int us;
|
|
int res;
|
|
|
|
res = _PyTime_AsTimeval_impl(t, &secs, &us, round);
|
|
|
|
#ifdef MS_WINDOWS
|
|
tv->tv_sec = (long)secs;
|
|
#else
|
|
tv->tv_sec = secs;
|
|
#endif
|
|
tv->tv_usec = us;
|
|
|
|
if (res < 0 || (_PyTime_t)tv->tv_sec != secs) {
|
|
if (raise)
|
|
error_time_t_overflow();
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
_PyTime_AsTimeval(_PyTime_t t, struct timeval *tv, _PyTime_round_t round)
|
|
{
|
|
return _PyTime_AsTimevalStruct_impl(t, tv, round, 1);
|
|
}
|
|
|
|
int
|
|
_PyTime_AsTimeval_noraise(_PyTime_t t, struct timeval *tv, _PyTime_round_t round)
|
|
{
|
|
return _PyTime_AsTimevalStruct_impl(t, tv, round, 0);
|
|
}
|
|
|
|
int
|
|
_PyTime_AsTimevalTime_t(_PyTime_t t, time_t *p_secs, int *us,
|
|
_PyTime_round_t round)
|
|
{
|
|
_PyTime_t secs;
|
|
int res;
|
|
|
|
res = _PyTime_AsTimeval_impl(t, &secs, us, round);
|
|
|
|
*p_secs = secs;
|
|
|
|
if (res < 0 || (_PyTime_t)*p_secs != secs) {
|
|
error_time_t_overflow();
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
#if defined(HAVE_CLOCK_GETTIME) || defined(HAVE_KQUEUE)
|
|
int
|
|
_PyTime_AsTimespec(_PyTime_t t, struct timespec *ts)
|
|
{
|
|
_PyTime_t secs, nsec;
|
|
|
|
secs = t / SEC_TO_NS;
|
|
nsec = t % SEC_TO_NS;
|
|
if (nsec < 0) {
|
|
nsec += SEC_TO_NS;
|
|
secs -= 1;
|
|
}
|
|
ts->tv_sec = (time_t)secs;
|
|
assert(0 <= nsec && nsec < SEC_TO_NS);
|
|
ts->tv_nsec = nsec;
|
|
|
|
if ((_PyTime_t)ts->tv_sec != secs) {
|
|
error_time_t_overflow();
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static int
|
|
pygettimeofday_new(_PyTime_t *tp, _Py_clock_info_t *info, int raise)
|
|
{
|
|
#ifdef MS_WINDOWS
|
|
FILETIME system_time;
|
|
ULARGE_INTEGER large;
|
|
|
|
assert(info == NULL || raise);
|
|
|
|
GetSystemTimeAsFileTime(&system_time);
|
|
large.u.LowPart = system_time.dwLowDateTime;
|
|
large.u.HighPart = system_time.dwHighDateTime;
|
|
/* 11,644,473,600,000,000,000: number of nanoseconds between
|
|
the 1st january 1601 and the 1st january 1970 (369 years + 89 leap
|
|
days). */
|
|
*tp = large.QuadPart * 100 - 11644473600000000000;
|
|
if (info) {
|
|
DWORD timeAdjustment, timeIncrement;
|
|
BOOL isTimeAdjustmentDisabled, ok;
|
|
|
|
info->implementation = "GetSystemTimeAsFileTime()";
|
|
info->monotonic = 0;
|
|
ok = GetSystemTimeAdjustment(&timeAdjustment, &timeIncrement,
|
|
&isTimeAdjustmentDisabled);
|
|
if (!ok) {
|
|
PyErr_SetFromWindowsErr(0);
|
|
return -1;
|
|
}
|
|
info->resolution = timeIncrement * 1e-7;
|
|
info->adjustable = 1;
|
|
}
|
|
|
|
#else /* MS_WINDOWS */
|
|
int err;
|
|
#ifdef HAVE_CLOCK_GETTIME
|
|
struct timespec ts;
|
|
#else
|
|
struct timeval tv;
|
|
#endif
|
|
|
|
assert(info == NULL || raise);
|
|
|
|
#ifdef HAVE_CLOCK_GETTIME
|
|
err = clock_gettime(CLOCK_REALTIME, &ts);
|
|
if (err) {
|
|
if (raise)
|
|
PyErr_SetFromErrno(PyExc_OSError);
|
|
return -1;
|
|
}
|
|
if (_PyTime_FromTimespec(tp, &ts, raise) < 0)
|
|
return -1;
|
|
|
|
if (info) {
|
|
struct timespec res;
|
|
info->implementation = "clock_gettime(CLOCK_REALTIME)";
|
|
info->monotonic = 0;
|
|
info->adjustable = 1;
|
|
if (clock_getres(CLOCK_REALTIME, &res) == 0)
|
|
info->resolution = res.tv_sec + res.tv_nsec * 1e-9;
|
|
else
|
|
info->resolution = 1e-9;
|
|
}
|
|
#else /* HAVE_CLOCK_GETTIME */
|
|
|
|
/* test gettimeofday() */
|
|
#ifdef GETTIMEOFDAY_NO_TZ
|
|
err = gettimeofday(&tv);
|
|
#else
|
|
err = gettimeofday(&tv, (struct timezone *)NULL);
|
|
#endif
|
|
if (err) {
|
|
if (raise)
|
|
PyErr_SetFromErrno(PyExc_OSError);
|
|
return -1;
|
|
}
|
|
if (_PyTime_FromTimeval(tp, &tv, raise) < 0)
|
|
return -1;
|
|
|
|
if (info) {
|
|
info->implementation = "gettimeofday()";
|
|
info->resolution = 1e-6;
|
|
info->monotonic = 0;
|
|
info->adjustable = 1;
|
|
}
|
|
#endif /* !HAVE_CLOCK_GETTIME */
|
|
#endif /* !MS_WINDOWS */
|
|
return 0;
|
|
}
|
|
|
|
_PyTime_t
|
|
_PyTime_GetSystemClock(void)
|
|
{
|
|
_PyTime_t t;
|
|
if (pygettimeofday_new(&t, NULL, 0) < 0) {
|
|
/* should not happen, _PyTime_Init() checked the clock at startup */
|
|
assert(0);
|
|
|
|
/* use a fixed value instead of a random value from the stack */
|
|
t = 0;
|
|
}
|
|
return t;
|
|
}
|
|
|
|
int
|
|
_PyTime_GetSystemClockWithInfo(_PyTime_t *t, _Py_clock_info_t *info)
|
|
{
|
|
return pygettimeofday_new(t, info, 1);
|
|
}
|
|
|
|
static int
|
|
pymonotonic(_PyTime_t *tp, _Py_clock_info_t *info, int raise)
|
|
{
|
|
#if defined(MS_WINDOWS)
|
|
ULONGLONG ticks;
|
|
_PyTime_t t;
|
|
|
|
assert(info == NULL || raise);
|
|
|
|
ticks = GetTickCount64();
|
|
assert(sizeof(ticks) <= sizeof(_PyTime_t));
|
|
t = (_PyTime_t)ticks;
|
|
|
|
if (_PyTime_check_mul_overflow(t, MS_TO_NS)) {
|
|
if (raise) {
|
|
_PyTime_overflow();
|
|
return -1;
|
|
}
|
|
/* Hello, time traveler! */
|
|
assert(0);
|
|
}
|
|
*tp = t * MS_TO_NS;
|
|
|
|
if (info) {
|
|
DWORD timeAdjustment, timeIncrement;
|
|
BOOL isTimeAdjustmentDisabled, ok;
|
|
info->implementation = "GetTickCount64()";
|
|
info->monotonic = 1;
|
|
ok = GetSystemTimeAdjustment(&timeAdjustment, &timeIncrement,
|
|
&isTimeAdjustmentDisabled);
|
|
if (!ok) {
|
|
PyErr_SetFromWindowsErr(0);
|
|
return -1;
|
|
}
|
|
info->resolution = timeIncrement * 1e-7;
|
|
info->adjustable = 0;
|
|
}
|
|
|
|
#elif defined(__APPLE__)
|
|
static mach_timebase_info_data_t timebase;
|
|
uint64_t time;
|
|
|
|
if (timebase.denom == 0) {
|
|
/* According to the Technical Q&A QA1398, mach_timebase_info() cannot
|
|
fail: https://developer.apple.com/library/mac/#qa/qa1398/ */
|
|
(void)mach_timebase_info(&timebase);
|
|
}
|
|
|
|
time = mach_absolute_time();
|
|
|
|
/* apply timebase factor */
|
|
time *= timebase.numer;
|
|
time /= timebase.denom;
|
|
|
|
*tp = time;
|
|
|
|
if (info) {
|
|
info->implementation = "mach_absolute_time()";
|
|
info->resolution = (double)timebase.numer / timebase.denom * 1e-9;
|
|
info->monotonic = 1;
|
|
info->adjustable = 0;
|
|
}
|
|
|
|
#else
|
|
struct timespec ts;
|
|
#ifdef CLOCK_HIGHRES
|
|
const clockid_t clk_id = CLOCK_HIGHRES;
|
|
const char *implementation = "clock_gettime(CLOCK_HIGHRES)";
|
|
#else
|
|
const clockid_t clk_id = CLOCK_MONOTONIC;
|
|
const char *implementation = "clock_gettime(CLOCK_MONOTONIC)";
|
|
#endif
|
|
|
|
assert(info == NULL || raise);
|
|
|
|
if (clock_gettime(clk_id, &ts) != 0) {
|
|
if (raise) {
|
|
PyErr_SetFromErrno(PyExc_OSError);
|
|
return -1;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
if (info) {
|
|
struct timespec res;
|
|
info->monotonic = 1;
|
|
info->implementation = implementation;
|
|
info->adjustable = 0;
|
|
if (clock_getres(clk_id, &res) != 0) {
|
|
PyErr_SetFromErrno(PyExc_OSError);
|
|
return -1;
|
|
}
|
|
info->resolution = res.tv_sec + res.tv_nsec * 1e-9;
|
|
}
|
|
if (_PyTime_FromTimespec(tp, &ts, raise) < 0)
|
|
return -1;
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
_PyTime_t
|
|
_PyTime_GetMonotonicClock(void)
|
|
{
|
|
_PyTime_t t;
|
|
if (pymonotonic(&t, NULL, 0) < 0) {
|
|
/* should not happen, _PyTime_Init() checked that monotonic clock at
|
|
startup */
|
|
assert(0);
|
|
|
|
/* use a fixed value instead of a random value from the stack */
|
|
t = 0;
|
|
}
|
|
return t;
|
|
}
|
|
|
|
int
|
|
_PyTime_GetMonotonicClockWithInfo(_PyTime_t *tp, _Py_clock_info_t *info)
|
|
{
|
|
return pymonotonic(tp, info, 1);
|
|
}
|
|
|
|
int
|
|
_PyTime_Init(void)
|
|
{
|
|
_PyTime_t t;
|
|
|
|
/* ensure that the system clock works */
|
|
if (_PyTime_GetSystemClockWithInfo(&t, NULL) < 0)
|
|
return -1;
|
|
|
|
/* ensure that the operating system provides a monotonic clock */
|
|
if (_PyTime_GetMonotonicClockWithInfo(&t, NULL) < 0)
|
|
return -1;
|
|
|
|
/* check that _PyTime_FromSeconds() cannot overflow */
|
|
assert(INT_MAX <= _PyTime_MAX / SEC_TO_NS);
|
|
assert(INT_MIN >= _PyTime_MIN / SEC_TO_NS);
|
|
return 0;
|
|
}
|