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#include
"Python.h"
#include
"pycore_pymath.h"
// _Py_InIntegralTypeRange()
#ifdef
MS_WINDOWS
# include
<winsock2.h>
// struct timeval
#endif
#if
defined(
__APPLE__
)
# include
<mach/mach_time.h>
// mach_absolute_time(), mach_timebase_info()
#if
defined(
__APPLE__
)
&&
defined(
__has_builtin
)
# if
__has_builtin
(
__builtin_available
)
# define
HAVE_CLOCK_GETTIME_RUNTIME
__builtin_available(macOS 10.12, iOS 10.0, tvOS 10.0, watchOS 3.0, *)
# endif
#endif
#endif
/* 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)
#define
NS_TO_100NS
(100)
#if
SIZEOF_TIME_T
==
SIZEOF_LONG_LONG
# define
PY_TIME_T_MAX
LLONG_MAX
# define
PY_TIME_T_MIN
LLONG_MIN
#elif
SIZEOF_TIME_T
==
SIZEOF_LONG
# define
PY_TIME_T_MAX
LONG_MAX
# define
PY_TIME_T_MIN
LONG_MIN
#else
# error
"unsupported time_t size"
#endif
static
void
pytime_time_t_overflow
(
void
)
{
PyErr_SetString
(
PyExc_OverflowError
,
"timestamp out of range for platform time_t"
);
}
static
void
pytime_overflow
(
void
)
{
PyErr_SetString
(
PyExc_OverflowError
,
"timestamp too large to convert to C _PyTime_t"
);
}
static
inline
_PyTime_t
pytime_from_nanoseconds
(
_PyTime_t
t
)
{
// _PyTime_t is a number of nanoseconds
return
t
;
}
static
inline
_PyTime_t
pytime_as_nanoseconds
(
_PyTime_t
t
)
{
// _PyTime_t is a number of nanoseconds: see pytime_from_nanoseconds()
return
t
;
}
// Compute t1 + t2. Clamp to [_PyTime_MIN; _PyTime_MAX] on overflow.
static
inline
int
pytime_add
(
_PyTime_t
*
t1
,
_PyTime_t
t2
)
{
if
(
t2
>
0
&&
*
t1
>
_PyTime_MAX
-
t2
) {
*
t1
=
_PyTime_MAX
;
return
-1
;
}
else
if
(
t2
<
0
&&
*
t1
<
_PyTime_MIN
-
t2
) {
*
t1
=
_PyTime_MIN
;
return
-1
;
}
else
{
*
t1
+=
t2
;
return
0
;
}
}
_PyTime_t
_PyTime_Add
(
_PyTime_t
t1
,
_PyTime_t
t2
)
{
(
void
)
pytime_add
(
&
t1
,
t2
);
return
t1
;
}
static
inline
int
pytime_mul_check_overflow
(
_PyTime_t
a
,
_PyTime_t
b
)
{
if
(
b
!=
0
) {
assert
(
b
>
0
);
return
((
a
<
_PyTime_MIN
/
b
)
||
(
_PyTime_MAX
/
b
<
a
));
}
else
{
return
0
;
}
}
// Compute t * k. Clamp to [_PyTime_MIN; _PyTime_MAX] on overflow.
static
inline
int
pytime_mul
(
_PyTime_t
*
t
,
_PyTime_t
k
)
{
assert
(
k
>=
0
);
if
(
pytime_mul_check_overflow
(
*
t
,
k
)) {
*
t
=
(
*
t
>=
0
) ?
_PyTime_MAX
:
_PyTime_MIN
;
return
-1
;
}
else
{
*
t
*=
k
;
return
0
;
}
}
// Compute t * k. Clamp to [_PyTime_MIN; _PyTime_MAX] on overflow.
static
inline
_PyTime_t
_PyTime_Mul
(
_PyTime_t
t
,
_PyTime_t
k
)
{
(
void
)
pytime_mul
(
&
t
,
k
);
return
t
;
}
_PyTime_t
_PyTime_MulDiv
(
_PyTime_t
ticks
,
_PyTime_t
mul
,
_PyTime_t
div
)
{
/* Compute (ticks * mul / div) in two parts to reduce the risk of integer
overflow: compute the integer part, and then the remaining part.
(ticks * mul) / div == (ticks / div) * mul + (ticks % div) * mul / div
*/
_PyTime_t
intpart
,
remaining
;
intpart
=
ticks
/
div
;
ticks
%=
div
;
remaining
=
_PyTime_Mul
(
ticks
,
mul
) /
div
;
// intpart * mul + remaining
return
_PyTime_Add
(
_PyTime_Mul
(
intpart
,
mul
),
remaining
);
}
time_t
_PyLong_AsTime_t
(
PyObject
*
obj
)
{
#if
SIZEOF_TIME_T
==
SIZEOF_LONG_LONG
long long
val
=
PyLong_AsLongLong
(
obj
);
#elif
SIZEOF_TIME_T
<=
SIZEOF_LONG
long
val
=
PyLong_AsLong
(
obj
);
#else
# error
"unsupported time_t size"
#endif
if
(
val
==
-1
&&
PyErr_Occurred
()) {
if
(
PyErr_ExceptionMatches
(
PyExc_OverflowError
)) {
pytime_time_t_overflow
();
}
return
-1
;
}
return
(
time_t
)
val
;
}
PyObject
*
_PyLong_FromTime_t
(
time_t
t
)
{
#if
SIZEOF_TIME_T
==
SIZEOF_LONG_LONG
return
PyLong_FromLongLong
((
long long
)
t
);
#elif
SIZEOF_TIME_T
<=
SIZEOF_LONG
return
PyLong_FromLong
((
long
)
t
);
#else
# error
"unsupported time_t size"
#endif
}
// Convert _PyTime_t to time_t.
// Return 0 on success. Return -1 and clamp the value on overflow.
static
int
_PyTime_AsTime_t
(
_PyTime_t
t
,
time_t
*
t2
)
{
#if
SIZEOF_TIME_T
<
_SIZEOF_PYTIME_T
if
((
_PyTime_t
)
PY_TIME_T_MAX
<
t
) {
*
t2
=
PY_TIME_T_MAX
;
return
-1
;
}
if
(
t
<
(
_PyTime_t
)
PY_TIME_T_MIN
) {
*
t2
=
PY_TIME_T_MIN
;
return
-1
;
}
#endif
*
t2
=
(
time_t
)
t
;
return
0
;
}
#ifdef
MS_WINDOWS
// Convert _PyTime_t to long.
// Return 0 on success. Return -1 and clamp the value on overflow.
static
int
_PyTime_AsLong
(
_PyTime_t
t
,
long
*
t2
)
{
#if
SIZEOF_LONG
<
_SIZEOF_PYTIME_T
if
((
_PyTime_t
)
LONG_MAX
<
t
) {
*
t2
=
LONG_MAX
;
return
-1
;
}
if
(
t
<
(
_PyTime_t
)
LONG_MIN
) {
*
t2
=
LONG_MIN
;
return
-1
;
}
#endif
*
t2
=
(
long
)
t
;
return
0
;
}
#endif
/* Round to nearest with ties going to nearest even integer
(_PyTime_ROUND_HALF_EVEN) */
static
double
pytime_round_half_even
(
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_round_half_even
(
d
);
}
else
if
(
round
==
_PyTime_ROUND_CEILING
) {
d
=
ceil
(
d
);
}
else
if
(
round
==
_PyTime_ROUND_FLOOR
) {
d
=
floor
(
d
);
}
else
{
assert
(
round
==
_PyTime_ROUND_UP
);
d
=
(
d
>=
0.0
) ?
ceil
(
d
) :
floor
(
d
);
}
return
d
;
}
static
int
pytime_double_to_denominator
(
double
d
,
time_t
*
sec
,
long
*
numerator
,
long
idenominator
,
_PyTime_round_t
round
)
{
double
denominator
=
(
double
)
idenominator
;
double
intpart
;
/* 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
);
if
(!
_Py_InIntegralTypeRange
(
time_t
,
intpart
)) {
pytime_time_t_overflow
();
return
-1
;
}
*
sec
=
(
time_t
)
intpart
;
*
numerator
=
(
long
)
floatpart
;
assert
(
0
<=
*
numerator
&&
*
numerator
<
idenominator
);
return
0
;
}
static
int
pytime_object_to_denominator
(
PyObject
*
obj
,
time_t
*
sec
,
long
*
numerator
,
long
denominator
,
_PyTime_round_t
round
)
{
assert
(
denominator
>=
1
);
if
(
PyFloat_Check
(
obj
)) {
double
d
=
PyFloat_AsDouble
(
obj
);
if
(
Py_IS_NAN
(
d
)) {
*
numerator
=
0
;
PyErr_SetString
(
PyExc_ValueError
,
"Invalid value NaN (not a number)"
);
return
-1
;
}
return
pytime_double_to_denominator
(
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
;
/* volatile avoids optimization changing how numbers are rounded */
volatile
double
d
;
d
=
PyFloat_AsDouble
(
obj
);
if
(
Py_IS_NAN
(
d
)) {
PyErr_SetString
(
PyExc_ValueError
,
"Invalid value NaN (not a number)"
);
return
-1
;
}
d
=
pytime_round
(
d
,
round
);
(
void
)
modf
(
d
,
&
intpart
);
if
(!
_Py_InIntegralTypeRange
(
time_t
,
intpart
)) {
pytime_time_t_overflow
();
return
-1
;
}
*
sec
=
(
time_t
)
intpart
;
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
)
{
return
pytime_object_to_denominator
(
obj
,
sec
,
nsec
,
SEC_TO_NS
,
round
);
}
int
_PyTime_ObjectToTimeval
(
PyObject
*
obj
,
time_t
*
sec
,
long
*
usec
,
_PyTime_round_t
round
)
{
return
pytime_object_to_denominator
(
obj
,
sec
,
usec
,
SEC_TO_US
,
round
);
}
_PyTime_t
_PyTime_FromSeconds
(
int
seconds
)
{
/* ensure that integer overflow cannot happen, int type should have 32
bits, whereas _PyTime_t type has at least 64 bits (SEC_TO_NS takes 30
bits). */
static_assert
(
INT_MAX
<=
_PyTime_MAX
/
SEC_TO_NS
,
"_PyTime_t overflow"
);
static_assert
(
INT_MIN
>=
_PyTime_MIN
/
SEC_TO_NS
,
"_PyTime_t underflow"
);
_PyTime_t
t
=
(
_PyTime_t
)
seconds
;
assert
((
t
>=
0
&&
t
<=
_PyTime_MAX
/
SEC_TO_NS
)
||
(
t
<
0
&&
t
>=
_PyTime_MIN
/
SEC_TO_NS
));
t
*=
SEC_TO_NS
;
return
pytime_from_nanoseconds
(
t
);
}
_PyTime_t
_PyTime_FromNanoseconds
(
_PyTime_t
ns
)
{
return
pytime_from_nanoseconds
(
ns
);
}
int
_PyTime_FromNanosecondsObject
(
_PyTime_t
*
tp
,
PyObject
*
obj
)
{
if
(!
PyLong_Check
(
obj
)) {
PyErr_Format
(
PyExc_TypeError
,
"expect int, got %s"
,
Py_TYPE
(
obj
)
->
tp_name
);
return
-1
;
}
static_assert
(
sizeof
(
long long
)
==
sizeof
(
_PyTime_t
),
"_PyTime_t is not long long"
);
long long
nsec
=
PyLong_AsLongLong
(
obj
);
if
(
nsec
==
-1
&&
PyErr_Occurred
()) {
if
(
PyErr_ExceptionMatches
(
PyExc_OverflowError
)) {
pytime_overflow
();
}
return
-1
;
}
_PyTime_t
t
=
(
_PyTime_t
)
nsec
;
*
tp
=
pytime_from_nanoseconds
(
t
);
return
0
;
}
#ifdef
HAVE_CLOCK_GETTIME
static
int
pytime_fromtimespec
(
_PyTime_t
*
tp
,
struct
timespec
*
ts
,
int
raise_exc
)
{
_PyTime_t
t
,
tv_nsec
;
static_assert
(
sizeof
(
ts
->
tv_sec
) <=
sizeof
(
_PyTime_t
),
"timespec.tv_sec is larger than _PyTime_t"
);
t
=
(
_PyTime_t
)
ts
->
tv_sec
;
int
res1
=
pytime_mul
(
&
t
,
SEC_TO_NS
);
tv_nsec
=
ts
->
tv_nsec
;
int
res2
=
pytime_add
(
&
t
,
tv_nsec
);
*
tp
=
pytime_from_nanoseconds
(
t
);
if
(
raise_exc
&&
(
res1
<
0
||
res2
<
0
)) {
pytime_overflow
();
return
-1
;
}
return
0
;
}
int
_PyTime_FromTimespec
(
_PyTime_t
*
tp
,
struct
timespec
*
ts
)
{
return
pytime_fromtimespec
(
tp
,
ts
,
1
);
}
#endif
#ifndef
MS_WINDOWS
static
int
pytime_fromtimeval
(
_PyTime_t
*
tp
,
struct
timeval
*
tv
,
int
raise_exc
)
{
static_assert
(
sizeof
(
tv
->
tv_sec
) <=
sizeof
(
_PyTime_t
),
"timeval.tv_sec is larger than _PyTime_t"
);
_PyTime_t
t
=
(
_PyTime_t
)
tv
->
tv_sec
;
int
res1
=
pytime_mul
(
&
t
,
SEC_TO_NS
);
_PyTime_t
usec
=
(
_PyTime_t
)
tv
->
tv_usec
*
US_TO_NS
;
int
res2
=
pytime_add
(
&
t
,
usec
);
*
tp
=
pytime_from_nanoseconds
(
t
);
if
(
raise_exc
&&
(
res1
<
0
||
res2
<
0
)) {
pytime_overflow
();
return
-1
;
}
return
0
;
}
int
_PyTime_FromTimeval
(
_PyTime_t
*
tp
,
struct
timeval
*
tv
)
{
return
pytime_fromtimeval
(
tp
,
tv
,
1
);
}
#endif
static
int
pytime_from_double
(
_PyTime_t
*
tp
,
double
value
,
_PyTime_round_t
round
,
long
unit_to_ns
)
{
/* 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
);
if
(!
_Py_InIntegralTypeRange
(
_PyTime_t
,
d
)) {
pytime_overflow
();
return
-1
;
}
_PyTime_t
ns
=
(
_PyTime_t
)
d
;
*
tp
=
pytime_from_nanoseconds
(
ns
);
return
0
;
}
static
int
pytime_from_object
(
_PyTime_t
*
tp
,
PyObject
*
obj
,
_PyTime_round_t
round
,
long
unit_to_ns
)
{
if
(
PyFloat_Check
(
obj
)) {
double
d
;
d
=
PyFloat_AsDouble
(
obj
);
if
(
Py_IS_NAN
(
d
)) {
PyErr_SetString
(
PyExc_ValueError
,
"Invalid value NaN (not a number)"
);
return
-1
;
}
return
pytime_from_double
(
tp
,
d
,
round
,
unit_to_ns
);
}
else
{
long long
sec
=
PyLong_AsLongLong
(
obj
);
if
(
sec
==
-1
&&
PyErr_Occurred
()) {
if
(
PyErr_ExceptionMatches
(
PyExc_OverflowError
)) {
pytime_overflow
();
}
return
-1
;
}
static_assert
(
sizeof
(
long long
) <=
sizeof
(
_PyTime_t
),
"_PyTime_t is smaller than long long"
);
_PyTime_t
ns
=
(
_PyTime_t
)
sec
;
if
(
pytime_mul
(
&
ns
,
unit_to_ns
)
<
0
) {
pytime_overflow
();
return
-1
;
}
*
tp
=
pytime_from_nanoseconds
(
ns
);
return
0
;
}
}
int
_PyTime_FromSecondsObject
(
_PyTime_t
*
tp
,
PyObject
*
obj
,
_PyTime_round_t
round
)
{
return
pytime_from_object
(
tp
,
obj
,
round
,
SEC_TO_NS
);
}
int
_PyTime_FromMillisecondsObject
(
_PyTime_t
*
tp
,
PyObject
*
obj
,
_PyTime_round_t
round
)
{
return
pytime_from_object
(
tp
,
obj
,
round
,
MS_TO_NS
);
}
double
_PyTime_AsSecondsDouble
(
_PyTime_t
t
)
{
/* volatile avoids optimization changing how numbers are rounded */
volatile
double
d
;
_PyTime_t
ns
=
pytime_as_nanoseconds
(
t
);
if
(
ns
%
SEC_TO_NS
==
0
) {
/* Divide using integers to avoid rounding issues on the integer part.
1e-9 cannot be stored exactly in IEEE 64-bit. */
_PyTime_t
secs
=
ns
/
SEC_TO_NS
;
d
=
(
double
)
secs
;
}
else
{
d
=
(
double
)
ns
;
d
/=
1e9
;
}
return
d
;
}
PyObject
*
_PyTime_AsNanosecondsObject
(
_PyTime_t
t
)
{
_PyTime_t
ns
=
pytime_as_nanoseconds
(
t
);
static_assert
(
sizeof
(
long long
) >=
sizeof
(
_PyTime_t
),
"_PyTime_t is larger than long long"
);
return
PyLong_FromLongLong
((
long long
)
ns
);
}
static
_PyTime_t
pytime_divide_round_up
(
const
_PyTime_t
t
,
const
_PyTime_t
k
)
{
assert
(
k
>
1
);
if
(
t
>=
0
) {
// Don't use (t + k - 1) / k to avoid integer overflow
// if t is equal to _PyTime_MAX
_PyTime_t
q
=
t
/
k
;
if
(
t
%
k
) {
q
+=
1
;
}
return
q
;
}
else
{
// Don't use (t - (k - 1)) / k to avoid integer overflow
// if t is equals to _PyTime_MIN.
_PyTime_t
q
=
t
/
k
;
if
(
t
%
k
) {
q
-=
1
;
}
return
q
;
}
}
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
=
t
/
k
;
_PyTime_t
r
=
t
%
k
;
_PyTime_t
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
pytime_divide_round_up
(
t
,
k
);
}
else
{
return
t
/
k
;
}
}
else
if
(
round
==
_PyTime_ROUND_FLOOR
){
if
(
t
>=
0
) {
return
t
/
k
;
}
else
{
return
pytime_divide_round_up
(
t
,
k
);
}
}
else
{
assert
(
round
==
_PyTime_ROUND_UP
);
return
pytime_divide_round_up
(
t
,
k
);
}
}
// Compute (t / k, t % k) in (pq, pr).
// Make sure that 0 <= pr < k.
// Return 0 on success.
// Return -1 on underflow and store (_PyTime_MIN, 0) in (pq, pr).
static
int
pytime_divmod
(
const
_PyTime_t
t
,
const
_PyTime_t
k
,
_PyTime_t
*
pq
,
_PyTime_t
*
pr
)
{
assert
(
k
>
1
);
_PyTime_t
q
=
t
/
k
;
_PyTime_t
r
=
t
%
k
;
if
(
r
<
0
) {
if
(
q
==
_PyTime_MIN
) {
*
pq
=
_PyTime_MIN
;
*
pr
=
0
;
return
-1
;
}
r
+=
k
;
q
-=
1
;
}
assert
(
0
<=
r
&&
r
<
k
);
*
pq
=
q
;
*
pr
=
r
;
return
0
;
}
_PyTime_t
_PyTime_AsNanoseconds
(
_PyTime_t
t
)
{
return
pytime_as_nanoseconds
(
t
);
}
#ifdef
MS_WINDOWS
_PyTime_t
_PyTime_As100Nanoseconds
(
_PyTime_t
t
,
_PyTime_round_t
round
)
{
_PyTime_t
ns
=
pytime_as_nanoseconds
(
t
);
return
pytime_divide
(
ns
,
NS_TO_100NS
,
round
);
}
#endif
_PyTime_t
_PyTime_AsMicroseconds
(
_PyTime_t
t
,
_PyTime_round_t
round
)
{
_PyTime_t
ns
=
pytime_as_nanoseconds
(
t
);
return
pytime_divide
(
ns
,
NS_TO_US
,
round
);
}
_PyTime_t
_PyTime_AsMilliseconds
(
_PyTime_t
t
,
_PyTime_round_t
round
)
{
_PyTime_t
ns
=
pytime_as_nanoseconds
(
t
);
return
pytime_divide
(
ns
,
NS_TO_MS
,
round
);
}
static
int
pytime_as_timeval
(
_PyTime_t
t
,
_PyTime_t
*
ptv_sec
,
int
*
ptv_usec
,
_PyTime_round_t
round
)
{
_PyTime_t
ns
=
pytime_as_nanoseconds
(
t
);
_PyTime_t
us
=
pytime_divide
(
ns
,
US_TO_NS
,
round
);
_PyTime_t
tv_sec
,
tv_usec
;
int
res
=
pytime_divmod
(
us
,
SEC_TO_US
,
&
tv_sec
,
&
tv_usec
);
*
ptv_sec
=
tv_sec
;
*
ptv_usec
=
(
int
)
tv_usec
;
return
res
;
}
static
int
pytime_as_timeval_struct
(
_PyTime_t
t
,
struct
timeval
*
tv
,
_PyTime_round_t
round
,
int
raise_exc
)
{
_PyTime_t
tv_sec
;
int
tv_usec
;
int
res
=
pytime_as_timeval
(
t
,
&
tv_sec
,
&
tv_usec
,
round
);
int
res2
;
#ifdef
MS_WINDOWS
// On Windows, timeval.tv_sec type is long
res2
=
_PyTime_AsLong
(
tv_sec
,
&
tv
->
tv_sec
);
#else
res2
=
_PyTime_AsTime_t
(
tv_sec
,
&
tv
->
tv_sec
);
#endif
if
(
res2
<
0
) {
tv_usec
=
0
;
}
tv
->
tv_usec
=
tv_usec
;
if
(
raise_exc
&&
(
res
<
0
||
res2
<
0
)) {
pytime_time_t_overflow
();
return
-1
;
}
return
0
;
}
int
_PyTime_AsTimeval
(
_PyTime_t
t
,
struct
timeval
*
tv
,
_PyTime_round_t
round
)
{
return
pytime_as_timeval_struct
(
t
,
tv
,
round
,
1
);
}
void
_PyTime_AsTimeval_clamp
(
_PyTime_t
t
,
struct
timeval
*
tv
,
_PyTime_round_t
round
)
{
(
void
)
pytime_as_timeval_struct
(
t
,
tv
,
round
,
0
);
}
int
_PyTime_AsTimevalTime_t
(
_PyTime_t
t
,
time_t
*
p_secs
,
int
*
us
,
_PyTime_round_t
round
)
{
_PyTime_t
secs
;
if
(
pytime_as_timeval
(
t
,
&
secs
,
us
,
round
)
<
0
) {
pytime_time_t_overflow
();
return
-1
;
}
if
(
_PyTime_AsTime_t
(
secs
,
p_secs
)
<
0
) {
pytime_time_t_overflow
();
return
-1
;
}
return
0
;
}
#if
defined(
HAVE_CLOCK_GETTIME
)
||
defined(
HAVE_KQUEUE
)
static
int
pytime_as_timespec
(
_PyTime_t
t
,
struct
timespec
*
ts
,
int
raise_exc
)
{
_PyTime_t
ns
=
pytime_as_nanoseconds
(
t
);
_PyTime_t
tv_sec
,
tv_nsec
;
int
res
=
pytime_divmod
(
ns
,
SEC_TO_NS
,
&
tv_sec
,
&
tv_nsec
);
int
res2
=
_PyTime_AsTime_t
(
tv_sec
,
&
ts
->
tv_sec
);
if
(
res2
<
0
) {
tv_nsec
=
0
;
}
ts
->
tv_nsec
=
tv_nsec
;
if
(
raise_exc
&&
(
res
<
0
||
res2
<
0
)) {
pytime_time_t_overflow
();
return
-1
;
}
return
0
;
}
void
_PyTime_AsTimespec_clamp
(
_PyTime_t
t
,
struct
timespec
*
ts
)
{
(
void
)
pytime_as_timespec
(
t
,
ts
,
0
);
}
int
_PyTime_AsTimespec
(
_PyTime_t
t
,
struct
timespec
*
ts
)
{
return
pytime_as_timespec
(
t
,
ts
,
1
);
}
#endif
static
int
py_get_system_clock
(
_PyTime_t
*
tp
,
_Py_clock_info_t
*
info
,
int
raise_exc
)
{
assert
(
info
==
NULL
||
raise_exc
);
#ifdef
MS_WINDOWS
FILETIME
system_time
;
ULARGE_INTEGER
large
;
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). */
_PyTime_t
ns
=
large
.
QuadPart
*
100
-
11644473600000000000
;
*
tp
=
pytime_from_nanoseconds
(
ns
);
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
;
#if
defined(
HAVE_CLOCK_GETTIME
)
struct
timespec
ts
;
#endif
#if
!defined(
HAVE_CLOCK_GETTIME
)
||
defined(
__APPLE__
)
struct
timeval
tv
;
#endif
#ifdef
HAVE_CLOCK_GETTIME
#ifdef
HAVE_CLOCK_GETTIME_RUNTIME
if
(
HAVE_CLOCK_GETTIME_RUNTIME
) {
#endif
err
=
clock_gettime
(
CLOCK_REALTIME
,
&
ts
);
if
(
err
) {
if
(
raise_exc
) {
PyErr_SetFromErrno
(
PyExc_OSError
);
}
return
-1
;
}
if
(
pytime_fromtimespec
(
tp
,
&
ts
,
raise_exc
)
<
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
;
}
}
#ifdef
HAVE_CLOCK_GETTIME_RUNTIME
}
else
{
#endif
#endif
#if
!defined(
HAVE_CLOCK_GETTIME
)
||
defined(
HAVE_CLOCK_GETTIME_RUNTIME
)
/* test gettimeofday() */
err
=
gettimeofday
(
&
tv
, (
struct
timezone
*
)
NULL
);
if
(
err
) {
if
(
raise_exc
) {
PyErr_SetFromErrno
(
PyExc_OSError
);
}
return
-1
;
}
if
(
pytime_fromtimeval
(
tp
,
&
tv
,
raise_exc
)
<
0
) {
return
-1
;
}
if
(
info
) {
info
->
implementation
=
"gettimeofday()"
;
info
->
resolution
=
1e-6
;
info
->
monotonic
=
0
;
info
->
adjustable
=
1
;
}
#if
defined(
HAVE_CLOCK_GETTIME_RUNTIME
)
&&
defined(
HAVE_CLOCK_GETTIME
)
}
/* end of availibity block */
#endif
#endif
/* !HAVE_CLOCK_GETTIME */
#endif
/* !MS_WINDOWS */
return
0
;
}
_PyTime_t
_PyTime_GetSystemClock
(
void
)
{
_PyTime_t
t
;
if
(
py_get_system_clock
(
&
t
,
NULL
,
0
)
<
0
) {
// If clock_gettime(CLOCK_REALTIME) or gettimeofday() fails:
// silently ignore the failure and return 0.
t
=
0
;
}
return
t
;
}
int
_PyTime_GetSystemClockWithInfo
(
_PyTime_t
*
t
,
_Py_clock_info_t
*
info
)
{
return
py_get_system_clock
(
t
,
info
,
1
);
}
#ifdef
__APPLE__
static
int
py_mach_timebase_info
(
_PyTime_t
*
pnumer
,
_PyTime_t
*
pdenom
,
int
raise
)
{
static
mach_timebase_info_data_t
timebase
;
/* 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
);
/* Sanity check: should never occur in practice */
if
(
timebase
.
numer
<
1
||
timebase
.
denom
<
1
) {
if
(
raise
) {
PyErr_SetString
(
PyExc_RuntimeError
,
"invalid mach_timebase_info"
);
}
return
-1
;
}
/* Check that timebase.numer and timebase.denom can be casted to
_PyTime_t. In practice, timebase uses uint32_t, so casting cannot
overflow. At the end, only make sure that the type is uint32_t
(_PyTime_t is 64-bit long). */
static_assert
(
sizeof
(
timebase
.
numer
) <=
sizeof
(
_PyTime_t
),
"timebase.numer is larger than _PyTime_t"
);
static_assert
(
sizeof
(
timebase
.
denom
) <=
sizeof
(
_PyTime_t
),
"timebase.denom is larger than _PyTime_t"
);
/* Make sure that _PyTime_MulDiv(ticks, timebase_numer, timebase_denom)
cannot overflow.
Known time bases:
View remainder of file in raw view
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