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/*
py/pyext - python external object for PD and MaxMSP
Copyright (c)2002-2005 Thomas Grill (gr@grrrr.org)
For information on usage and redistribution, and for a DISCLAIMER OF ALL
WARRANTIES, see the file, "license.txt," in this distribution.
*/
#include "pyext.h"
#include "flinternal.h"
#include <set>
typedef std::set<PyObject *> FuncSet;
struct bounddata
{
PyObject *self;
FuncSet funcs;
};
bool pyext::boundmeth(flext_base *th,t_symbol *sym,int argc,t_atom *argv,void *data)
{
bounddata *obj = (bounddata *)data;
py *pyth = static_cast<py *>(th);
PyThreadState *state = pyth->PyLock();
PyObject *args = MakePyArgs(sym,argc,argv,-1,obj->self != NULL);
// call all functions bound by this symbol
for(FuncSet::iterator it = obj->funcs.begin(); it != obj->funcs.end(); ++it) {
PyObject *ret = PyObject_CallObject(*it,args);
if(!ret) {
PyErr_Print();
}
Py_XDECREF(ret);
}
Py_XDECREF(args);
pyth->PyUnlock(state);
return true;
}
PyObject *pyext::pyext_bind(PyObject *,PyObject *args)
{
PyObject *self,*meth;
char *name;
if(!PyArg_ParseTuple(args, "OsO:pyext_bind", &self,&name,&meth))
post("py/pyext - Wrong arguments!");
else if(!PyInstance_Check(self) || !(PyMethod_Check(meth) || PyFunction_Check(meth))) {
post("py/pyext - Wrong argument types!");
}
else {
const t_symbol *recv = MakeSymbol(name);
/*
if(GetBound(recv))
post("py/pyext - Symbol \"%s\" is already hooked",GetString(recv));
*/
// make a proxy object
if(PyMethod_Check(meth)) {
PyObject *no = PyObject_GetAttrString(meth,"__name__");
meth = PyObject_GetAttr(self,no);
Py_DECREF(no);
}
void *data = NULL;
if(GetThis(self)->GetBoundMethod(recv,boundmeth,data)) {
// already bound to that symbol and function
bounddata *bdt = (bounddata *)data;
FLEXT_ASSERT(bdt != NULL && bdt->self == self);
bdt->funcs.insert(meth);
}
else {
bounddata *data = new bounddata;
data->self = self;
data->funcs.insert(meth);
GetThis(self)->BindMethod(recv,boundmeth,data);
Py_INCREF(self); // self is borrowed reference
}
}
Py_INCREF(Py_None);
return Py_None;
}
PyObject *pyext::pyext_unbind(PyObject *,PyObject *args)
{
PyObject *self,*meth;
char *name;
if(!PyArg_ParseTuple(args, "OsO:pyext_bind", &self,&name,&meth))
post("py/pyext - Wrong arguments!");
else if(!PyInstance_Check(self) || !(PyMethod_Check(meth) || PyFunction_Check(meth))) {
post("py/pyext - Wrong argument types!");
}
else {
const t_symbol *recv = MakeSymbol(name);
if(PyMethod_Check(meth)) {
PyObject *no = PyObject_GetAttrString(meth,"__name__");
meth = PyObject_GetAttr(self,no); // meth is given a new reference!
Py_DECREF(no);
}
void *data = NULL;
if(GetThis(self)->UnbindMethod(recv,boundmeth,&data)) {
bounddata *bdt = (bounddata *)data;
FLEXT_ASSERT(bdt != NULL);
if(PyMethod_Check(meth)) Py_DECREF(meth);
// erase from map
bdt->funcs.erase(meth);
if(bdt->funcs.empty()) {
Py_DECREF(bdt->self);
delete bdt;
}
}
}
Py_INCREF(Py_None);
return Py_None;
}
void pyext::ClearBinding()
{
// in case the object couldn't be constructed...
if(!pyobj) return;
FLEXT_ASSERT(GetThis(pyobj));
void *data = NULL;
const t_symbol *sym = NULL;
// unbind all
while(GetThis(pyobj)->UnbindMethod(sym,NULL,&data)) {
bounddata *bdt = (bounddata *)data;
if(bdt) {
for(FuncSet::iterator it = bdt->funcs.begin(); it != bdt->funcs.end(); ++it) {
PyObject *func = *it;
if(PyMethod_Check(func)) Py_DECREF(func);
}
Py_DECREF(bdt->self);
if(data) delete bdt;
}
}
}
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