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Copy pathgcc-python-closure.c
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157 lines (127 loc) · 3.83 KB
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/*
Copyright 2011 David Malcolm <dmalcolm@redhat.com>
Copyright 2011 Red Hat, Inc.
This is free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see
<http://www.gnu.org/licenses/>.
*/
#include <Python.h>
#include <gcc-plugin.h>
#include "gcc-python-closure.h"
#include "gcc-python.h"
#include "function.h"
#include "gcc-c-api/gcc-function.h"
struct callback_closure *
PyGcc_closure_new_generic(PyObject *callback, PyObject *extraargs, PyObject *kwargs)
{
struct callback_closure *closure;
assert(callback);
/* extraargs can be NULL
kwargs can also be NULL */
closure = PyMem_New(struct callback_closure, 1);
if (!closure) {
return NULL;
}
closure->callback = callback;
Py_INCREF(callback);
// FIXME: we may want to pass in the event enum as well as the user-supplied extraargs
if (extraargs) {
/* Hold a reference to the extraargs for when we register it with the
callback: */
closure->extraargs = extraargs;
Py_INCREF(extraargs);
} else {
closure->extraargs = PyTuple_New(0);
if (!closure->extraargs) {
return NULL; // singleton, so can't happen, really
}
}
closure->kwargs = kwargs;
if (kwargs) {
Py_INCREF(kwargs);
}
closure->event = (enum plugin_event)GCC_PYTHON_PLUGIN_BAD_EVENT;
return closure;
}
struct callback_closure *
PyGcc_Closure_NewForPluginEvent(PyObject *callback, PyObject *extraargs, PyObject *kwargs,
enum plugin_event event)
{
struct callback_closure *closure = PyGcc_closure_new_generic(callback, extraargs, kwargs);
if (closure) {
closure->event = event;
}
return closure;
}
PyObject *
PyGcc_Closure_MakeArgs(struct callback_closure * closure, int add_cfun, PyObject *wrapped_gcc_data)
{
PyObject *args = NULL;
PyObject *cfun_obj = NULL;
int i;
assert(closure);
/* wrapped_gcc_data can be NULL if there isn't one for this kind of callback */
assert(closure->extraargs);
assert(PyTuple_Check(closure->extraargs));
if (wrapped_gcc_data) {
/*
Equivalent to either:
args = (gcc_data, cfun, ) + extraargs
or:
args = (gcc_data, ) + extraargs
*/
args = PyTuple_New((add_cfun ? 2 : 1) + PyTuple_Size(closure->extraargs));
if (!args) {
goto error;
}
if (add_cfun) {
cfun_obj = PyGccFunction_New(gcc_get_current_function());
if (!cfun_obj) {
goto error;
}
}
PyTuple_SetItem(args, 0, wrapped_gcc_data);
if (add_cfun) {
PyTuple_SetItem(args, 1, cfun_obj);
}
Py_INCREF(wrapped_gcc_data);
for (i = 0; i < PyTuple_Size(closure->extraargs); i++) {
PyObject *item = PyTuple_GetItem(closure->extraargs, i);
PyTuple_SetItem(args, i + (add_cfun ? 2 : 1), item);
Py_INCREF(item);
}
return args;
} else {
/* Just reuse closure's extraargs tuple */
Py_INCREF(closure->extraargs);
return closure->extraargs;
}
error:
Py_XDECREF(args);
Py_XDECREF(cfun_obj);
return NULL;
}
void
PyGcc_closure_free(struct callback_closure *closure)
{
assert(closure);
Py_XDECREF(closure->callback);
Py_XDECREF(closure->extraargs);
Py_XDECREF(closure->kwargs);
PyMem_Free(closure);
}
/*
PEP-7
Local variables:
c-basic-offset: 4
indent-tabs-mode: nil
End:
*/