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gh-137514: Add a free-threading wrapper for mutexes (GH-137515)

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Add `FT_MUTEX_LOCK`/`FT_MUTEX_UNLOCK`, which call `PyMutex_Lock` and `PyMutex_Unlock` on the free-threaded build, and no-op otherwise.
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Peter Bierma 2025-08-07 11:24:50 -04:00 • committed by GitHub
parent dec624e0af
commit 082f370cdd
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9 changed files with 44 additions and 88 deletions
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19
Python/codecs.c
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@ -16,7 +16,7 @@ Copyright (c) Corporation for National Research Initiatives.
#include "pycore_runtime.h" // _Py_ID()
#include "pycore_ucnhash.h" // _PyUnicode_Name_CAPI
#include "pycore_unicodeobject.h" // _PyUnicode_InternMortal()
#include "pycore_pyatomic_ft_wrappers.h"
static const char *codecs_builtin_error_handlers[] = {
"strict", "ignore", "replace",
@ -40,13 +40,10 @@ int PyCodec_Register(PyObject *search_function)
PyErr_SetString(PyExc_TypeError, "argument must be callable");
goto onError;
}
#ifdef Py_GIL_DISABLED
PyMutex_Lock(&interp->codecs.search_path_mutex);
#endif
FT_MUTEX_LOCK(&interp->codecs.search_path_mutex);
int ret = PyList_Append(interp->codecs.search_path, search_function);
#ifdef Py_GIL_DISABLED
PyMutex_Unlock(&interp->codecs.search_path_mutex);
#endif
FT_MUTEX_UNLOCK(&interp->codecs.search_path_mutex);
return ret;
onError:
@ -66,9 +63,7 @@ PyCodec_Unregister(PyObject *search_function)
PyObject *codec_search_path = interp->codecs.search_path;
assert(PyList_CheckExact(codec_search_path));
for (Py_ssize_t i = 0; i < PyList_GET_SIZE(codec_search_path); i++) {
#ifdef Py_GIL_DISABLED
PyMutex_Lock(&interp->codecs.search_path_mutex);
#endif
FT_MUTEX_LOCK(&interp->codecs.search_path_mutex);
PyObject *item = PyList_GetItemRef(codec_search_path, i);
int ret = 1;
if (item == search_function) {
@ -76,9 +71,7 @@ PyCodec_Unregister(PyObject *search_function)
// while we hold search_path_mutex.
ret = PyList_SetSlice(codec_search_path, i, i+1, NULL);
}
#ifdef Py_GIL_DISABLED
PyMutex_Unlock(&interp->codecs.search_path_mutex);
#endif
FT_MUTEX_UNLOCK(&interp->codecs.search_path_mutex);
Py_DECREF(item);
if (ret != 1) {
assert(interp->codecs.search_cache != NULL);