bpo-36763: Add PyMemAllocatorName (GH-13387)

* Add PyMemAllocatorName enum
* _PyPreConfig.allocator type becomes PyMemAllocatorName, instead of
  char*
* Remove _PyPreConfig_Clear()
* Add _PyMem_GetAllocatorName()
* Rename _PyMem_GetAllocatorsName() to
  _PyMem_GetCurrentAllocatorName()
* Remove _PyPreConfig_SetAllocator(): just call
  _PyMem_SetupAllocators() directly, we don't have do reallocate the
  configuration with the new allocator anymore!
* _PyPreConfig_Write() parameter becomes const, as it should be in
  the first place!

1 files changed, 4 insertions, 8 deletions

diff --git a/Python/pylifecycle.c b/Python/pylifecycle.c
index e89152637fe..eecb439a11d 100644
--- a/Python/pylifecycle.c
+++ b/Python/pylifecycle.c
@@ -706,26 +706,22 @@ _Py_PreInitializeFromPyArgv(const _PyPreConfig *src_config, const _PyArgv *args)
     if (src_config) {
         if (_PyPreConfig_Copy(&config, src_config) < 0) {
             err = _Py_INIT_NO_MEMORY();
-            goto done;
+            return err;
         }
     }
 
     err = _PyPreConfig_Read(&config, args);
     if (_Py_INIT_FAILED(err)) {
-        goto done;
+        return err;
     }
 
     err = _PyPreConfig_Write(&config);
     if (_Py_INIT_FAILED(err)) {
-        goto done;
+        return err;
     }
 
     runtime->pre_initialized = 1;
-    err = _Py_INIT_OK();
-
-done:
-    _PyPreConfig_Clear(&config);
-    return err;
+    return _Py_INIT_OK();
 }