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bpo-38304: Add PyConfig.struct_size (GH-16451)

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Add a new struct_size field to PyPreConfig and PyConfig structures to
allow to modify these structures in the future without breaking the
backward compatibility.

* Replace private _config_version field with public struct_size field
  in PyPreConfig and PyConfig.
* Public PyPreConfig_InitIsolatedConfig() and
  PyPreConfig_InitPythonConfig()
  return type becomes PyStatus, instead of void.
* Internal _PyConfig_InitCompatConfig(),
  _PyPreConfig_InitCompatConfig(), _PyPreConfig_InitFromConfig(),
  _PyPreConfig_InitFromPreConfig() return type becomes PyStatus,
  instead of void.
* Remove _Py_CONFIG_VERSION
* Update the Initialization Configuration documentation.
This commit is contained in:
Victor Stinner 2019-09-28 04:28:35 +02:00 • committed by GitHub
parent 52d1b86bde
commit 441b10cf28
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GPG key ID: 4AEE18F83AFDEB23
13 changed files with 350 additions and 60 deletions
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17
Include/cpython/initconfig.h
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@ -45,8 +45,10 @@ PyAPI_FUNC(PyStatus) PyWideStringList_Insert(PyWideStringList *list,
/* --- PyPreConfig ----------------------------------------------- */
typedef struct {
int _config_version; /* Internal configuration version,
used for ABI compatibility */
/* Size of the structure in bytes: must be initialized to
sizeof(PyPreConfig). Field used for API and ABI compatibility. */
size_t struct_size;
int _config_init; /* _PyConfigInitEnum value */
/* Parse Py_PreInitializeFromBytesArgs() arguments?
@ -122,15 +124,17 @@ typedef struct {
int allocator;
} PyPreConfig;
PyAPI_FUNC(void) PyPreConfig_InitPythonConfig(PyPreConfig *config);
PyAPI_FUNC(void) PyPreConfig_InitIsolatedConfig(PyPreConfig *config);
PyAPI_FUNC(PyStatus) PyPreConfig_InitPythonConfig(PyPreConfig *config);
PyAPI_FUNC(PyStatus) PyPreConfig_InitIsolatedConfig(PyPreConfig *config);
/* --- PyConfig ---------------------------------------------- */
typedef struct {
int _config_version; /* Internal configuration version,
used for ABI compatibility */
/* Size of the structure in bytes: must be initialized to
sizeof(PyConfig). Field used for API and ABI compatibility. */
size_t struct_size;
int _config_init; /* _PyConfigInitEnum value */
int isolated; /* Isolated mode? see PyPreConfig.isolated */
@ -403,7 +407,6 @@ typedef struct {
/* If equal to 0, stop Python initialization before the "main" phase */
int _init_main;
} PyConfig;
PyAPI_FUNC(PyStatus) PyConfig_InitPythonConfig(PyConfig *config);