gh-110850: Cleanup PyTime API: PyTime_t are nanoseconds (#115753)

PyTime_t no longer uses an arbitrary unit, it's always a number of
nanoseconds (64-bit signed integer).

* Rename _PyTime_FromNanosecondsObject() to _PyTime_FromLong().
* Rename _PyTime_AsNanosecondsObject() to _PyTime_AsLong().
* Remove pytime_from_nanoseconds().
* Remove pytime_as_nanoseconds().
* Remove _PyTime_FromNanoseconds().

1 files changed, 10 insertions, 12 deletions

diff --git a/Modules/_testinternalcapi/pytime.c b/Modules/_testinternalcapi/pytime.c
index 2abe5c2..2b0a205 100644
--- a/Modules/_testinternalcapi/pytime.c
+++ b/Modules/_testinternalcapi/pytime.c
@@ -17,7 +17,7 @@ test_pytime_fromseconds(PyObject *self, PyObject *args)
         return NULL;
     }
     PyTime_t ts = _PyTime_FromSeconds(seconds);
-    return _PyTime_AsNanosecondsObject(ts);
+    return _PyTime_AsLong(ts);
 }
 
 static int
@@ -49,7 +49,7 @@ test_pytime_fromsecondsobject(PyObject *self, PyObject *args)
     if (_PyTime_FromSecondsObject(&ts, obj, round) == -1) {
         return NULL;
     }
-    return _PyTime_AsNanosecondsObject(ts);
+    return _PyTime_AsLong(ts);
 }
 
 static PyObject *
@@ -64,7 +64,7 @@ test_PyTime_AsTimeval(PyObject *self, PyObject *args)
         return NULL;
     }
     PyTime_t t;
-    if (_PyTime_FromNanosecondsObject(&t, obj) < 0) {
+    if (_PyTime_FromLong(&t, obj) < 0) {
         return NULL;
     }
     struct timeval tv;
@@ -91,7 +91,7 @@ test_PyTime_AsTimeval_clamp(PyObject *self, PyObject *args)
         return NULL;
     }
     PyTime_t t;
-    if (_PyTime_FromNanosecondsObject(&t, obj) < 0) {
+    if (_PyTime_FromLong(&t, obj) < 0) {
         return NULL;
     }
     struct timeval tv;
@@ -113,7 +113,7 @@ test_PyTime_AsTimespec(PyObject *self, PyObject *args)
         return NULL;
     }
     PyTime_t t;
-    if (_PyTime_FromNanosecondsObject(&t, obj) < 0) {
+    if (_PyTime_FromLong(&t, obj) < 0) {
         return NULL;
     }
     struct timespec ts;
@@ -131,7 +131,7 @@ test_PyTime_AsTimespec_clamp(PyObject *self, PyObject *args)
         return NULL;
     }
     PyTime_t t;
-    if (_PyTime_FromNanosecondsObject(&t, obj) < 0) {
+    if (_PyTime_FromLong(&t, obj) < 0) {
         return NULL;
     }
     struct timespec ts;
@@ -149,15 +149,14 @@ test_PyTime_AsMilliseconds(PyObject *self, PyObject *args)
         return NULL;
     }
     PyTime_t t;
-    if (_PyTime_FromNanosecondsObject(&t, obj) < 0) {
+    if (_PyTime_FromLong(&t, obj) < 0) {
         return NULL;
     }
     if (check_time_rounding(round) < 0) {
         return NULL;
     }
     PyTime_t ms = _PyTime_AsMilliseconds(t, round);
-    PyTime_t ns = _PyTime_FromNanoseconds(ms);
-    return _PyTime_AsNanosecondsObject(ns);
+    return _PyTime_AsLong(ms);
 }
 
 static PyObject *
@@ -169,15 +168,14 @@ test_PyTime_AsMicroseconds(PyObject *self, PyObject *args)
         return NULL;
     }
     PyTime_t t;
-    if (_PyTime_FromNanosecondsObject(&t, obj) < 0) {
+    if (_PyTime_FromLong(&t, obj) < 0) {
         return NULL;
     }
     if (check_time_rounding(round) < 0) {
         return NULL;
     }
     PyTime_t us = _PyTime_AsMicroseconds(t, round);
-    PyTime_t ns = _PyTime_FromNanoseconds(us);
-    return _PyTime_AsNanosecondsObject(ns);
+    return _PyTime_AsLong(us);
 }
 
 static PyObject *