gh-112567: Add _Py_GetTicksPerSecond() function (#112587)

* Move _PyRuntimeState.time to _posixstate.ticks_per_second and
  time_module_state.ticks_per_second.
* Add time_module_state.clocks_per_second.
* Rename _PyTime_GetClockWithInfo() to py_clock().
* Rename _PyTime_GetProcessTimeWithInfo() to py_process_time().
* Add process_time_times() helper function, called by
  py_process_time().
* os.times() is now always built: no longer rely on HAVE_TIMES.

2 files changed, 24 insertions, 5 deletions

diff --git a/Python/fileutils.c b/Python/fileutils.c
index 649b188..9d12bc8 100644
--- a/Python/fileutils.c
+++ b/Python/fileutils.c
@@ -2943,3 +2943,27 @@ _Py_closerange(int first, int last)
 #endif /* USE_FDWALK */
     _Py_END_SUPPRESS_IPH
 }
+
+
+#ifndef MS_WINDOWS
+// Ticks per second used by clock() and times() functions.
+// See os.times() and time.process_time() implementations.
+int
+_Py_GetTicksPerSecond(long *ticks_per_second)
+{
+#if defined(HAVE_SYSCONF) && defined(_SC_CLK_TCK)
+    long value = sysconf(_SC_CLK_TCK);
+    if (value < 1) {
+        return -1;
+    }
+    *ticks_per_second = value;
+#elif defined(HZ)
+    assert(HZ >= 1);
+    *ticks_per_second = HZ;
+#else
+    // Magic fallback value; may be bogus
+    *ticks_per_second = 60;
+#endif
+    return 0;
+}
+#endif
diff --git a/Python/pylifecycle.c b/Python/pylifecycle.c
index aff67d7..95a72eb 100644
--- a/Python/pylifecycle.c
+++ b/Python/pylifecycle.c
@@ -528,11 +528,6 @@ pycore_init_runtime(_PyRuntimeState *runtime,
         return status;
     }
 
-    status = _PyTime_Init();
-    if (_PyStatus_EXCEPTION(status)) {
-        return status;
-    }
-
     status = _PyImport_Init();
     if (_PyStatus_EXCEPTION(status)) {
         return status;