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Issue #27810: Add _PyCFunction_FastCallKeywords()

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Use _PyCFunction_FastCallKeywords() in ceval.c: it allows to remove a lot of
code from ceval.c which was only used to call C functions.
This commit is contained in:
Victor Stinner 2016-09-09 14:07:44 -07:00
parent 502893896a
commit ae8b69c410
5 changed files with 71 additions and 138 deletions
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9
Include/abstract.h
View file

@ -267,9 +267,16 @@ xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx*/
PyObject *args, PyObject *kwargs);
#ifndef Py_LIMITED_API
PyAPI_FUNC(PyObject*) _PyStack_AsTuple(PyObject **stack,
PyAPI_FUNC(PyObject*) _PyStack_AsTuple(
PyObject **stack,
Py_ssize_t nargs);
PyAPI_FUNC(PyObject *) _PyStack_AsDict(
PyObject **values,
Py_ssize_t nkwargs,
PyObject *kwnames,
PyObject *func);
/* Call the callable object func with the "fast call" calling convention:
args is a C array for positional arguments (nargs is the number of
positional arguments), kwargs is a dictionary for keyword arguments.

5
Include/methodobject.h
View file

@ -42,6 +42,11 @@ PyAPI_FUNC(PyObject *) _PyCFunction_FastCallDict(PyObject *func,
PyObject **args,
Py_ssize_t nargs,
PyObject *kwargs);
PyAPI_FUNC(PyObject *) _PyCFunction_FastCallKeywords(PyObject *func,
PyObject **stack,
Py_ssize_t nargs,
PyObject *kwnames);
#endif
struct PyMethodDef {

7
Objects/abstract.c
View file

@ -2366,7 +2366,7 @@ _PyObject_Call_Prepend(PyObject *func,
return result;
}
static PyObject *
PyObject *
_PyStack_AsDict(PyObject **values, Py_ssize_t nkwargs, PyObject *kwnames,
PyObject *func)
{
@ -2415,10 +2415,13 @@ _PyObject_FastCallKeywords(PyObject *func, PyObject **stack, Py_ssize_t nargs,
assert((nargs == 0 && nkwargs == 0) || stack != NULL);
if (PyFunction_Check(func)) {
/* Fast-path: avoid temporary tuple or dict */
return _PyFunction_FastCallKeywords(func, stack, nargs, kwnames);
}
if (PyCFunction_Check(func)) {
return _PyCFunction_FastCallKeywords(func, stack, nargs, kwnames);
}
if (nkwargs > 0) {
kwdict = _PyStack_AsDict(stack + nargs, nkwargs, kwnames, func);
if (kwdict == NULL) {

26
Objects/methodobject.c
View file

@ -155,6 +155,7 @@ _PyCFunction_FastCallDict(PyObject *func_obj, PyObject **args, Py_ssize_t nargs,
PyObject *result;
int flags;
assert(PyCFunction_Check(func));
assert(func != NULL);
assert(nargs >= 0);
assert(nargs == 0 || args != NULL);
@ -243,6 +244,31 @@ _PyCFunction_FastCallDict(PyObject *func_obj, PyObject **args, Py_ssize_t nargs,
return result;
}
PyObject *
_PyCFunction_FastCallKeywords(PyObject *func, PyObject **stack,
Py_ssize_t nargs, PyObject *kwnames)
{
PyObject *kwdict, *result;
Py_ssize_t nkwargs;
assert(PyCFunction_Check(func));
nkwargs = (kwnames == NULL) ? 0 : PyTuple_GET_SIZE(kwnames);
if (nkwargs > 0) {
kwdict = _PyStack_AsDict(stack + nargs, nkwargs, kwnames, func);
if (kwdict == NULL) {
return NULL;
}
}
else {
kwdict = NULL;
}
result = _PyCFunction_FastCallDict(func, stack, nargs, kwdict);
Py_XDECREF(kwdict);
return result;
}
/* Methods (the standard built-in methods, that is) */
static void

114
Python/ceval.c
View file

@ -115,8 +115,6 @@ static PyObject * call_function(PyObject ***, Py_ssize_t, PyObject *);
#endif
static PyObject * fast_function(PyObject *, PyObject **, Py_ssize_t, PyObject *);
static PyObject * do_call_core(PyObject *, PyObject *, PyObject *);
static PyObject * create_keyword_args(PyObject *, PyObject ***, PyObject *);
static PyObject * load_args(PyObject ***, Py_ssize_t);
#ifdef LLTRACE
static int lltrace;
@ -4892,21 +4890,6 @@ PyEval_GetFuncDesc(PyObject *func)
return " object";
}
static void
err_args(PyObject *func, int flags, Py_ssize_t nargs)
{
if (flags & METH_NOARGS)
PyErr_Format(PyExc_TypeError,
"%.200s() takes no arguments (%zd given)",
((PyCFunctionObject *)func)->m_ml->ml_name,
nargs);
else
PyErr_Format(PyExc_TypeError,
"%.200s() takes exactly one argument (%zd given)",
((PyCFunctionObject *)func)->m_ml->ml_name,
nargs);
}
#define C_TRACE(x, call) \
if (tstate->use_tracing && tstate->c_profilefunc) { \
if (call_trace(tstate->c_profilefunc, tstate->c_profileobj, \
@ -4950,61 +4933,20 @@ call_function(PyObject ***pp_stack, Py_ssize_t oparg, PyObject *kwnames
PyObject *x, *w;
Py_ssize_t nkwargs = (kwnames == NULL) ? 0 : PyTuple_GET_SIZE(kwnames);
Py_ssize_t nargs = oparg - nkwargs;
PyObject **stack;
/* Always dispatch PyCFunction first, because these are
presumed to be the most frequent callable object.
*/
if (PyCFunction_Check(func)) {
int flags = PyCFunction_GET_FLAGS(func);
PyThreadState *tstate = PyThreadState_GET();
PCALL(PCALL_CFUNCTION);
if (kwnames == NULL && flags & (METH_NOARGS | METH_O)) {
PyCFunction meth = PyCFunction_GET_FUNCTION(func);
PyObject *self = PyCFunction_GET_SELF(func);
if (flags & METH_NOARGS && nargs == 0) {
C_TRACE(x, (*meth)(self,NULL));
x = _Py_CheckFunctionResult(func, x, NULL);
}
else if (flags & METH_O && nargs == 1) {
PyObject *arg = EXT_POP(*pp_stack);
C_TRACE(x, (*meth)(self,arg));
Py_DECREF(arg);
x = _Py_CheckFunctionResult(func, x, NULL);
stack = (*pp_stack) - nargs - nkwargs;
C_TRACE(x, _PyCFunction_FastCallKeywords(func, stack, nargs, kwnames));
}
else {
err_args(func, flags, nargs);
x = NULL;
}
}
else {
PyObject *callargs, *kwdict = NULL;
if (kwnames != NULL) {
kwdict = create_keyword_args(kwnames, pp_stack, func);
if (kwdict == NULL) {
x = NULL;
goto cfuncerror;
}
}
callargs = load_args(pp_stack, nargs);
if (callargs != NULL) {
READ_TIMESTAMP(*pintr0);
C_TRACE(x, PyCFunction_Call(func, callargs, kwdict));
READ_TIMESTAMP(*pintr1);
Py_DECREF(callargs);
}
else {
x = NULL;
}
Py_XDECREF(kwdict);
}
}
else {
Py_ssize_t nkwargs = (kwnames == NULL) ? 0 : PyTuple_GET_SIZE(kwnames);
PyObject **stack;
if (PyMethod_Check(func) && PyMethod_GET_SELF(func) != NULL) {
/* optimize access to bound methods */
PyObject *self = PyMethod_GET_SELF(func);
@ -5034,7 +4976,6 @@ call_function(PyObject ***pp_stack, Py_ssize_t oparg, PyObject *kwnames
Py_DECREF(func);
}
cfuncerror:
assert((x != NULL) ^ (PyErr_Occurred() != NULL));
/* Clear the stack of the function object. Also removes
@ -5242,55 +5183,6 @@ _PyFunction_FastCallDict(PyObject *func, PyObject **args, Py_ssize_t nargs,
return result;
}
static PyObject *
create_keyword_args(PyObject *names, PyObject ***pp_stack,
PyObject *func)
{
Py_ssize_t nk = PyTuple_GET_SIZE(names);
PyObject *kwdict = _PyDict_NewPresized(nk);
if (kwdict == NULL)
return NULL;
while (--nk >= 0) {
int err;
PyObject *key = PyTuple_GET_ITEM(names, nk);
PyObject *value = EXT_POP(*pp_stack);
if (PyDict_GetItem(kwdict, key) != NULL) {
PyErr_Format(PyExc_TypeError,
"%.200s%s got multiple values "
"for keyword argument '%U'",
PyEval_GetFuncName(func),
PyEval_GetFuncDesc(func),
key);
Py_DECREF(value);
Py_DECREF(kwdict);
return NULL;
}
err = PyDict_SetItem(kwdict, key, value);
Py_DECREF(value);
if (err) {
Py_DECREF(kwdict);
return NULL;
}
}
return kwdict;
}
static PyObject *
load_args(PyObject ***pp_stack, Py_ssize_t nargs)
{
PyObject *args = PyTuple_New(nargs);
if (args == NULL) {
return NULL;
}
while (--nargs >= 0) {
PyObject *arg= EXT_POP(*pp_stack);
PyTuple_SET_ITEM(args, nargs, arg);
}
return args;
}
static PyObject *
do_call_core(PyObject *func, PyObject *callargs, PyObject *kwdict)
{