gh-81057: Move time Globals to _PyRuntimeState (gh-100122)

#81057

Author: ericsnowcurrently

Include/internal/pycore_os.h

@@ -44,6 +44,7 @@ extern void _PySys_Fini(PyInterpreterState *interp);
 extern int _PyBuiltins_AddExceptions(PyObject * bltinmod);
 extern PyStatus _Py_HashRandomization_Init(const PyConfig *);
 
+extern PyStatus _PyTime_Init(void);
 extern PyStatus _PyImportZip_Init(PyThreadState *tstate);
 extern PyStatus _PyGC_Init(PyInterpreterState *interp);
 extern PyStatus _PyAtExit_Init(PyInterpreterState *interp);

Include/internal/pycore_pylifecycle.h

@@ -21,7 +21,7 @@ extern "C" {
 #include "pycore_pymem.h"           // struct _pymem_allocators
 #include "pycore_pyhash.h"          // struct pyhash_runtime_state
 #include "pycore_obmalloc.h"        // struct obmalloc_state
-#include "pycore_os.h"              // struct _os_runtime_state
+#include "pycore_time.h"            // struct _time_runtime_state
 #include "pycore_unicodeobject.h"   // struct _Py_unicode_runtime_ids
 
 struct _getargs_runtime_state {
@@ -104,7 +104,7 @@ typedef struct pyruntimestate {
          * KeyboardInterrupt exception, suggesting the user pressed ^C. */
         int unhandled_keyboard_interrupt;
     } signals;
-    struct _os_runtime_state os;
+    struct _time_runtime_state time;
 
     struct pyinterpreters {
         PyThread_type_lock mutex;

Include/internal/pycore_runtime.h

@@ -26,7 +26,6 @@ extern "C" {
         }, \
         .obmalloc = _obmalloc_state_INIT(runtime.obmalloc), \
         .pyhash_state = pyhash_state_INIT, \
-        .os = _OS_RUNTIME_INIT, \
         .interpreters = { \
             /* This prevents interpreters from getting created \
               until _PyInterpreterState_Enable() is called. */ \

Include/internal/pycore_runtime_init.h

@@ -0,0 +1,25 @@
+#ifndef Py_INTERNAL_TIME_H
+#define Py_INTERNAL_TIME_H
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef Py_BUILD_CORE
+#  error "this header requires Py_BUILD_CORE define"
+#endif
+
+
+struct _time_runtime_state {
+#ifdef HAVE_TIMES
+    int ticks_per_second_initialized;
+    long ticks_per_second;
+#else
+    int _not_used;
+#endif
+};
+
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* !Py_INTERNAL_TIME_H */

Include/internal/pycore_time.h

@@ -1654,7 +1654,6 @@ PYTHON_HEADERS= \
 		$(srcdir)/Include/internal/pycore_object.h \
 		$(srcdir)/Include/internal/pycore_obmalloc.h \
 		$(srcdir)/Include/internal/pycore_obmalloc_init.h \
-		$(srcdir)/Include/internal/pycore_os.h \
 		$(srcdir)/Include/internal/pycore_pathconfig.h \
 		$(srcdir)/Include/internal/pycore_pyarena.h \
 		$(srcdir)/Include/internal/pycore_pyerrors.h \
@@ -1673,6 +1672,7 @@ PYTHON_HEADERS= \
 		$(srcdir)/Include/internal/pycore_structseq.h \
 		$(srcdir)/Include/internal/pycore_symtable.h \
 		$(srcdir)/Include/internal/pycore_sysmodule.h \
+		$(srcdir)/Include/internal/pycore_time.h \
 		$(srcdir)/Include/internal/pycore_token.h \
 		$(srcdir)/Include/internal/pycore_traceback.h \
 		$(srcdir)/Include/internal/pycore_tuple.h \

Makefile.pre.in

@@ -9065,24 +9065,6 @@ build_times_result(PyObject *module, double user, double system,
 }
 
 
-#ifdef _OS_NEED_TICKS_PER_SECOND
-#define ticks_per_second _PyRuntime.os.ticks_per_second
-static void
-ticks_per_second_init(void)
-{
-    if (ticks_per_second != -1) {
-        return;
-    }
-#  if defined(HAVE_SYSCONF) && defined(_SC_CLK_TCK)
-    ticks_per_second = sysconf(_SC_CLK_TCK);
-#  elif defined(HZ)
-    ticks_per_second = HZ;
-#  else
-    ticks_per_second = 60; /* magic fallback value; may be bogus */
-#  endif
-}
-#endif
-
 /*[clinic input]
 os.times
 
@@ -9116,22 +9098,24 @@ os_times_impl(PyObject *module)
         (double)0,
         (double)0);
 }
-#elif !defined(_OS_NEED_TICKS_PER_SECOND)
-# error "missing ticks_per_second"
 #else /* MS_WINDOWS */
 {
     struct tms t;
     clock_t c;
     errno = 0;
     c = times(&t);
-    if (c == (clock_t) -1)
+    if (c == (clock_t) -1) {
         return posix_error();
+    }
+    assert(_PyRuntime.time.ticks_per_second_initialized);
+#define ticks_per_second _PyRuntime.time.ticks_per_second
     return build_times_result(module,
                          (double)t.tms_utime / ticks_per_second,
                          (double)t.tms_stime / ticks_per_second,
                          (double)t.tms_cutime / ticks_per_second,
                          (double)t.tms_cstime / ticks_per_second,
                          (double)c / ticks_per_second);
+#undef ticks_per_second
 }
 #endif /* MS_WINDOWS */
 #endif /* HAVE_TIMES */
@@ -15950,10 +15934,6 @@ posixmodule_exec(PyObject *m)
     PyModule_AddObject(m, "statvfs_result", Py_NewRef(StatVFSResultType));
     state->StatVFSResultType = StatVFSResultType;
 
-#ifdef _OS_NEED_TICKS_PER_SECOND
-    ticks_per_second_init();
-#endif
-
 #if defined(HAVE_SCHED_SETPARAM) || defined(HAVE_SCHED_SETSCHEDULER) || defined(POSIX_SPAWN_SETSCHEDULER) || defined(POSIX_SPAWN_SETSCHEDPARAM)
     sched_param_desc.name = MODNAME ".sched_param";
     PyObject *SchedParamType = (PyObject *)PyStructSequence_NewType(&sched_param_desc);

Modules/posixmodule.c

@@ -62,6 +62,54 @@
 #define SEC_TO_NS (1000 * 1000 * 1000)
 
 
+#ifdef HAVE_TIMES
+
+static int
+check_ticks_per_second(long tps, const char *context)
+{
+    /* Effectively, check that _PyTime_MulDiv(t, SEC_TO_NS, ticks_per_second)
+       cannot overflow. */
+    if (tps >= 0 && (_PyTime_t)tps > _PyTime_MAX / SEC_TO_NS) {
+        PyErr_Format(PyExc_OverflowError, "%s is too large", context);
+        return -1;
+    }
+    return 0;
+}
+
+# define ticks_per_second _PyRuntime.time.ticks_per_second
+
+static void
+ensure_ticks_per_second(void)
+{
+    if (_PyRuntime.time.ticks_per_second_initialized) {
+        return;
+    }
+    _PyRuntime.time.ticks_per_second_initialized = 1;
+# if defined(HAVE_SYSCONF) && defined(_SC_CLK_TCK)
+    ticks_per_second = sysconf(_SC_CLK_TCK);
+    if (ticks_per_second < 1) {
+        ticks_per_second = -1;
+    }
+# elif defined(HZ)
+    ticks_per_second = HZ;
+# else
+    ticks_per_second = 60;  /* magic fallback value; may be bogus */
+# endif
+}
+
+#endif  /* HAVE_TIMES */
+
+
+PyStatus
+_PyTime_Init(void)
+{
+#ifdef HAVE_TIMES
+    ensure_ticks_per_second();
+#endif
+    return PyStatus_Ok();
+}
+
+
 /* Forward declarations */
 static int pysleep(_PyTime_t timeout);
 
@@ -140,18 +188,8 @@ Return the current time in nanoseconds since the Epoch.");
 static int
 _PyTime_GetClockWithInfo(_PyTime_t *tp, _Py_clock_info_t *info)
 {
-    static int initialized = 0;
-
-    if (!initialized) {
-        initialized = 1;
-
-        /* Make sure that _PyTime_MulDiv(ticks, SEC_TO_NS, CLOCKS_PER_SEC)
-           above cannot overflow */
-        if ((_PyTime_t)CLOCKS_PER_SEC > _PyTime_MAX / SEC_TO_NS) {
-            PyErr_SetString(PyExc_OverflowError,
-                            "CLOCKS_PER_SEC is too large");
-            return -1;
-        }
+    if (check_ticks_per_second(CLOCKS_PER_SEC, "CLOCKS_PER_SEC") < 0) {
+        return -1;
     }
 
     if (info) {
@@ -1308,36 +1346,10 @@ _PyTime_GetProcessTimeWithInfo(_PyTime_t *tp, _Py_clock_info_t *info)
     struct tms t;
 
     if (times(&t) != (clock_t)-1) {
-        static long ticks_per_second = -1;
-
-        if (ticks_per_second == -1) {
-            long freq;
-#if defined(HAVE_SYSCONF) && defined(_SC_CLK_TCK)
-            freq = sysconf(_SC_CLK_TCK);
-            if (freq < 1) {
-                freq = -1;
-            }
-#elif defined(HZ)
-            freq = HZ;
-#else
-            freq = 60; /* magic fallback value; may be bogus */
-#endif
-
-            if (freq != -1) {
-                /* check that _PyTime_MulDiv(t, SEC_TO_NS, ticks_per_second)
-                   cannot overflow below */
-#if LONG_MAX > _PyTime_MAX / SEC_TO_NS
-                if ((_PyTime_t)freq > _PyTime_MAX / SEC_TO_NS) {
-                    PyErr_SetString(PyExc_OverflowError,
-                                    "_SC_CLK_TCK is too large");
-                    return -1;
-                }
-#endif
-
-                ticks_per_second = freq;
-            }
+        assert(_PyRuntime.time.ticks_per_second_initialized);
+        if (check_ticks_per_second(ticks_per_second, "_SC_CLK_TCK") < 0) {
+            return -1;
         }
-
         if (ticks_per_second != -1) {
             if (info) {
                 info->implementation = "times()";

Modules/timemodule.c

@@ -110,6 +110,7 @@
     <ClCompile Include="..\Modules\getpath_noop.c" />
     <ClCompile Include="..\Modules\posixmodule.c" />
     <ClCompile Include="..\Modules\signalmodule.c" />
+    <ClCompile Include="..\Modules\timemodule.c" />
     <ClCompile Include="..\Modules\_tracemalloc.c" />
     <ClCompile Include="..\Modules\_io\_iomodule.c" />
     <ClCompile Include="..\Modules\_io\bufferedio.c" />

PCbuild/_freeze_module.vcxproj

@@ -367,6 +367,9 @@
     <ClCompile Include="..\Python\thread.c">
       <Filter>Source Files</Filter>
     </ClCompile>
+    <ClCompile Include="..\Modules\timemodule.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
     <ClCompile Include="..\Parser\token.c">
       <Filter>Source Files</Filter>
     </ClCompile>

PCbuild/_freeze_module.vcxproj.filters

@@ -236,7 +236,6 @@
     <ClInclude Include="..\Include\internal\pycore_object.h" />
     <ClInclude Include="..\Include\internal\pycore_obmalloc.h" />
     <ClInclude Include="..\Include\internal\pycore_obmalloc_init.h" />
-    <ClInclude Include="..\Include\internal\pycore_os.h" />
     <ClInclude Include="..\Include\internal\pycore_pathconfig.h" />
     <ClInclude Include="..\Include\internal\pycore_pyarena.h" />
     <ClInclude Include="..\Include\internal\pycore_pyerrors.h" />
@@ -255,6 +254,7 @@
     <ClInclude Include="..\Include\internal\pycore_structseq.h" />
     <ClInclude Include="..\Include\internal\pycore_sysmodule.h" />
     <ClInclude Include="..\Include\internal\pycore_symtable.h" />
+    <ClInclude Include="..\Include\internal\pycore_time.h" />
     <ClInclude Include="..\Include\internal\pycore_token.h" />
     <ClInclude Include="..\Include\internal\pycore_traceback.h" />
     <ClInclude Include="..\Include\internal\pycore_tuple.h" />

PCbuild/pythoncore.vcxproj

@@ -612,9 +612,6 @@
     <ClInclude Include="..\Include\internal\pycore_obmalloc_init.h">
       <Filter>Include\internal</Filter>
     </ClInclude>
-    <ClInclude Include="..\Include\internal\pycore_os.h">
-      <Filter>Include\internal</Filter>
-    </ClInclude>
     <ClInclude Include="..\Include\internal\pycore_pathconfig.h">
       <Filter>Include\internal</Filter>
     </ClInclude>
@@ -666,6 +663,9 @@
     <ClInclude Include="..\Include\internal\pycore_symtable.h">
       <Filter>Include\internal</Filter>
     </ClInclude>
+    <ClInclude Include="..\Include\internal\pycore_time.h">
+      <Filter>Include\internal</Filter>
+    </ClInclude>
     <ClInclude Include="..\Include\internal\pycore_token.h">
       <Filter>Include\internal</Filter>
     </ClInclude>

PCbuild/pythoncore.vcxproj.filters

@@ -606,6 +606,11 @@ 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;

Python/pylifecycle.c

@@ -387,12 +387,6 @@ Modules/faulthandler.c	-	old_stack	-
 ##################################
 ## global non-objects to fix in builtin modules
 
-##-----------------------
-## initialized once
-
-Modules/timemodule.c	_PyTime_GetClockWithInfo	initialized	-
-Modules/timemodule.c	_PyTime_GetProcessTimeWithInfo	ticks_per_second	-
-
 ##-----------------------
 ## state