Add _PyObject_FastCall()
Issue #27128: Add _PyObject_FastCall(), a new calling convention avoiding a
temporary tuple to pass positional parameters in most cases, but create a
temporary tuple if needed (ex: for the tp_call slot).
The API is prepared to support keyword parameters, but the full implementation
will come later (_PyFunction_FastCall() doesn't support keyword parameters
yet).
Add also:
* _PyStack_AsTuple() helper function: convert a "stack" of parameters to
a tuple.
* _PyCFunction_FastCall(): fast call implementation for C functions
* _PyFunction_FastCall(): fast call implementation for Python functions
diff --git a/Include/abstract.h b/Include/abstract.h
index 4ff79f2..280402c 100644
--- a/Include/abstract.h
+++ b/Include/abstract.h
@@ -267,10 +267,26 @@
PyObject *args, PyObject *kw);
#ifndef Py_LIMITED_API
+ PyAPI_FUNC(PyObject*) _PyStack_AsTuple(PyObject **stack,
+ Py_ssize_t nargs);
+
+ /* Call the callable object func with the "fast call" calling convention:
+ args is a C array for positional parameters (nargs is the number of
+ positional paramater), kwargs is a dictionary for keyword parameters.
+
+ If nargs is equal to zero, args can be NULL. kwargs can be NULL.
+ nargs must be greater or equal to zero.
+
+ Return the result on success. Raise an exception on return NULL on
+ error. */
+ PyAPI_FUNC(PyObject *) _PyObject_FastCall(PyObject *func,
+ PyObject **args, int nargs,
+ PyObject *kwargs);
+
PyAPI_FUNC(PyObject *) _Py_CheckFunctionResult(PyObject *func,
PyObject *result,
const char *where);
-#endif
+#endif /* Py_LIMITED_API */
/*
Call a callable Python object, callable_object, with
diff --git a/Include/funcobject.h b/Include/funcobject.h
index cc1426c..908944d 100644
--- a/Include/funcobject.h
+++ b/Include/funcobject.h
@@ -58,6 +58,13 @@
PyAPI_FUNC(PyObject *) PyFunction_GetAnnotations(PyObject *);
PyAPI_FUNC(int) PyFunction_SetAnnotations(PyObject *, PyObject *);
+#ifndef Py_LIMITED_API
+PyAPI_FUNC(PyObject *) _PyFunction_FastCall(
+ PyObject *func,
+ PyObject **args, int nargs,
+ PyObject *kwargs);
+#endif
+
/* Macros for direct access to these values. Type checks are *not*
done, so use with care. */
#define PyFunction_GET_CODE(func) \
diff --git a/Include/methodobject.h b/Include/methodobject.h
index e2ad804..8dec00a 100644
--- a/Include/methodobject.h
+++ b/Include/methodobject.h
@@ -37,6 +37,12 @@
#endif
PyAPI_FUNC(PyObject *) PyCFunction_Call(PyObject *, PyObject *, PyObject *);
+#ifndef Py_LIMITED_API
+PyAPI_FUNC(PyObject *) _PyCFunction_FastCall(PyObject *func,
+ PyObject **args, int nargs,
+ PyObject *kwargs);
+#endif
+
struct PyMethodDef {
const char *ml_name; /* The name of the built-in function/method */
PyCFunction ml_meth; /* The C function that implements it */