aboutsummaryrefslogtreecommitdiff
path: root/externals/grill/py/source/bound.cpp
blob: f402480b78b7d8e969779e030cff4cf0b2879833 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
/* 

py/pyext - python external object for PD and MaxMSP

Copyright (c) 2002 Thomas Grill (xovo@gmx.net)
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"

t_class *pyext::px_class;
pyext::py_proxy *pyext::px_head,*pyext::px_tail;

void pyext::py_proxy::px_method(py_proxy *obj,const t_symbol *s,int argc,const t_atom *argv)
{
	PY_LOCK

	PyObject *args = MakePyArgs(s,AtomList(argc,argv),-1,obj->self != NULL);
	PyObject *ret = PyObject_CallObject(obj->func,args);
	if(!ret) {
		PyErr_Print();
	}
	Py_XDECREF(ret);

	PY_UNLOCK
}


PyObject *pyext::pyext_bind(PyObject *,PyObject *args)
{
    PyObject *self,*meth;
	C *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 {
		t_symbol *recv = gensym(name);
/*
		if(GetBound(recv))
			post("py/pyext - Symbol \"%s\" is already hooked",GetString(recv));
*/		
		// make a proxy object
		py_proxy *px = (py_proxy *)object_new(px_class);
		if(PyMethod_Check(meth)) {
			PyObject *no = PyObject_GetAttrString(meth,"__name__");
			meth  = PyObject_GetAttr(self,no); 
			Py_DECREF(no);
		}
		px->init(recv,self,meth);  

		// add it to the list
		if(px_tail) px_tail->nxt = px;
		else px_head = px;
		px_tail = px;

		// Do bind
		pd_bind(&px->obj.ob_pd,recv);  

		Py_INCREF(self); // self is borrowed reference
	}

    Py_INCREF(Py_None);
    return Py_None;
}

PyObject *pyext::pyext_unbind(PyObject *,PyObject *args)
{
    PyObject *self,*meth;
	C *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 {
		t_symbol *recv = gensym(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);
		}

		// search proxy object
		py_proxy *pp = NULL,*px = px_head;
		while(px) {
			py_proxy *pn = px->nxt;
			if(recv == px->name && self == px->self && meth == px->func) {
				if(pp)
					pp->nxt = pn;
				else
					px_head = pn;
				if(!pn) px_tail = pp;
				break;
			}
			else pp = px;
			px = pn;
		}

		// do unbind
		if(px) {
			pd_unbind(&px->obj.ob_pd,recv);  
			object_free(px->obj);

			Py_DECREF(self);
			if(PyMethod_Check(meth)) Py_DECREF(meth);
		}
	}

    Py_INCREF(Py_None);
    return Py_None;
}


V pyext::ClearBinding()
{
	// search proxy object
	py_proxy *pp = NULL,*px = px_head;
	while(px) {
		py_proxy *pn = px->nxt;
		if(px->self == pyobj) {
			if(pp)
				pp->nxt = pn;
			else
				px_head = pn;
			if(!pn) px_tail = pp;

			Py_DECREF(px->self);
			if(PyMethod_Check(px->func)) Py_DECREF(px->func);

			pd_unbind(&px->obj.ob_pd,px->name);  
			object_free(px->obj);
		}
		else pp = px;	
		px = pn;
	}
}