Fred Drake | 41deb1e | 2001-02-01 05:27:45 +0000 | [diff] [blame] | 1 | #include "Python.h" |
Fred Drake | 41deb1e | 2001-02-01 05:27:45 +0000 | [diff] [blame] | 2 | |
| 3 | |
| 4 | #define GET_WEAKREFS_LISTPTR(o) \ |
| 5 | ((PyWeakReference **) PyObject_GET_WEAKREFS_LISTPTR(o)) |
| 6 | |
Larry Hastings | 61272b7 | 2014-01-07 12:41:53 -0800 | [diff] [blame] | 7 | /*[clinic input] |
Larry Hastings | 3182680 | 2013-10-19 00:09:25 -0700 | [diff] [blame] | 8 | module _weakref |
Larry Hastings | 61272b7 | 2014-01-07 12:41:53 -0800 | [diff] [blame] | 9 | [clinic start generated code]*/ |
Larry Hastings | 581ee36 | 2014-01-28 05:00:08 -0800 | [diff] [blame] | 10 | /*[clinic end generated code: output=da39a3ee5e6b4b0d input=ffec73b85846596d]*/ |
Larry Hastings | 44e2eaa | 2013-11-23 15:37:55 -0800 | [diff] [blame] | 11 | |
Serhiy Storchaka | 1009bf1 | 2015-04-03 23:53:51 +0300 | [diff] [blame] | 12 | #include "clinic/_weakref.c.h" |
| 13 | |
Larry Hastings | 61272b7 | 2014-01-07 12:41:53 -0800 | [diff] [blame] | 14 | /*[clinic input] |
Larry Hastings | 3182680 | 2013-10-19 00:09:25 -0700 | [diff] [blame] | 15 | |
| 16 | _weakref.getweakrefcount -> Py_ssize_t |
| 17 | |
| 18 | object: object |
| 19 | / |
| 20 | |
| 21 | Return the number of weak references to 'object'. |
Larry Hastings | 61272b7 | 2014-01-07 12:41:53 -0800 | [diff] [blame] | 22 | [clinic start generated code]*/ |
Larry Hastings | 3182680 | 2013-10-19 00:09:25 -0700 | [diff] [blame] | 23 | |
Larry Hastings | 3182680 | 2013-10-19 00:09:25 -0700 | [diff] [blame] | 24 | static Py_ssize_t |
Serhiy Storchaka | 1a2b24f | 2016-07-07 17:35:15 +0300 | [diff] [blame] | 25 | _weakref_getweakrefcount_impl(PyObject *module, PyObject *object) |
| 26 | /*[clinic end generated code: output=301806d59558ff3e input=cedb69711b6a2507]*/ |
Larry Hastings | 3182680 | 2013-10-19 00:09:25 -0700 | [diff] [blame] | 27 | { |
| 28 | PyWeakReference **list; |
Fred Drake | 7fdc0a1 | 2001-08-16 14:11:30 +0000 | [diff] [blame] | 29 | |
Larry Hastings | 3182680 | 2013-10-19 00:09:25 -0700 | [diff] [blame] | 30 | if (!PyType_SUPPORTS_WEAKREFS(Py_TYPE(object))) |
| 31 | return 0; |
Larry Hastings | 61272b7 | 2014-01-07 12:41:53 -0800 | [diff] [blame] | 32 | |
Larry Hastings | 3182680 | 2013-10-19 00:09:25 -0700 | [diff] [blame] | 33 | list = GET_WEAKREFS_LISTPTR(object); |
| 34 | return _PyWeakref_GetWeakrefCount(*list); |
Fred Drake | 41deb1e | 2001-02-01 05:27:45 +0000 | [diff] [blame] | 35 | } |
| 36 | |
| 37 | |
Martin v. Löwis | 14f8b4c | 2002-06-13 20:33:02 +0000 | [diff] [blame] | 38 | PyDoc_STRVAR(weakref_getweakrefs__doc__, |
Fred Drake | 7855aba | 2001-02-18 05:20:18 +0000 | [diff] [blame] | 39 | "getweakrefs(object) -- return a list of all weak reference objects\n" |
Martin v. Löwis | 14f8b4c | 2002-06-13 20:33:02 +0000 | [diff] [blame] | 40 | "that point to 'object'."); |
Fred Drake | 7855aba | 2001-02-18 05:20:18 +0000 | [diff] [blame] | 41 | |
Fred Drake | 41deb1e | 2001-02-01 05:27:45 +0000 | [diff] [blame] | 42 | static PyObject * |
Fred Drake | 7fdc0a1 | 2001-08-16 14:11:30 +0000 | [diff] [blame] | 43 | weakref_getweakrefs(PyObject *self, PyObject *object) |
Fred Drake | 41deb1e | 2001-02-01 05:27:45 +0000 | [diff] [blame] | 44 | { |
| 45 | PyObject *result = NULL; |
Fred Drake | 41deb1e | 2001-02-01 05:27:45 +0000 | [diff] [blame] | 46 | |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 47 | if (PyType_SUPPORTS_WEAKREFS(Py_TYPE(object))) { |
Fred Drake | 7fdc0a1 | 2001-08-16 14:11:30 +0000 | [diff] [blame] | 48 | PyWeakReference **list = GET_WEAKREFS_LISTPTR(object); |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 49 | Py_ssize_t count = _PyWeakref_GetWeakrefCount(*list); |
Fred Drake | 41deb1e | 2001-02-01 05:27:45 +0000 | [diff] [blame] | 50 | |
Fred Drake | 7fdc0a1 | 2001-08-16 14:11:30 +0000 | [diff] [blame] | 51 | result = PyList_New(count); |
| 52 | if (result != NULL) { |
| 53 | PyWeakReference *current = *list; |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 54 | Py_ssize_t i; |
Fred Drake | 7fdc0a1 | 2001-08-16 14:11:30 +0000 | [diff] [blame] | 55 | for (i = 0; i < count; ++i) { |
| 56 | PyList_SET_ITEM(result, i, (PyObject *) current); |
| 57 | Py_INCREF(current); |
| 58 | current = current->wr_next; |
Fred Drake | 41deb1e | 2001-02-01 05:27:45 +0000 | [diff] [blame] | 59 | } |
| 60 | } |
Fred Drake | 7fdc0a1 | 2001-08-16 14:11:30 +0000 | [diff] [blame] | 61 | } |
| 62 | else { |
| 63 | result = PyList_New(0); |
Fred Drake | 41deb1e | 2001-02-01 05:27:45 +0000 | [diff] [blame] | 64 | } |
| 65 | return result; |
| 66 | } |
| 67 | |
| 68 | |
Martin v. Löwis | 14f8b4c | 2002-06-13 20:33:02 +0000 | [diff] [blame] | 69 | PyDoc_STRVAR(weakref_proxy__doc__, |
Fred Drake | 7855aba | 2001-02-18 05:20:18 +0000 | [diff] [blame] | 70 | "proxy(object[, callback]) -- create a proxy object that weakly\n" |
| 71 | "references 'object'. 'callback', if given, is called with a\n" |
Fred Drake | 610291c | 2002-08-02 20:23:40 +0000 | [diff] [blame] | 72 | "reference to the proxy when 'object' is about to be finalized."); |
Fred Drake | 7855aba | 2001-02-18 05:20:18 +0000 | [diff] [blame] | 73 | |
Fred Drake | 41deb1e | 2001-02-01 05:27:45 +0000 | [diff] [blame] | 74 | static PyObject * |
| 75 | weakref_proxy(PyObject *self, PyObject *args) |
| 76 | { |
| 77 | PyObject *object; |
| 78 | PyObject *callback = NULL; |
Fred Drake | f7f8cad | 2001-10-05 22:00:24 +0000 | [diff] [blame] | 79 | PyObject *result = NULL; |
Fred Drake | 41deb1e | 2001-02-01 05:27:45 +0000 | [diff] [blame] | 80 | |
Fred Drake | 0d429e8 | 2001-10-23 21:12:47 +0000 | [diff] [blame] | 81 | if (PyArg_UnpackTuple(args, "proxy", 1, 2, &object, &callback)) { |
Fred Drake | f7f8cad | 2001-10-05 22:00:24 +0000 | [diff] [blame] | 82 | result = PyWeakref_NewProxy(object, callback); |
Fred Drake | 41deb1e | 2001-02-01 05:27:45 +0000 | [diff] [blame] | 83 | } |
Fred Drake | f7f8cad | 2001-10-05 22:00:24 +0000 | [diff] [blame] | 84 | return result; |
Fred Drake | 41deb1e | 2001-02-01 05:27:45 +0000 | [diff] [blame] | 85 | } |
| 86 | |
| 87 | |
| 88 | static PyMethodDef |
| 89 | weakref_functions[] = { |
Larry Hastings | 3182680 | 2013-10-19 00:09:25 -0700 | [diff] [blame] | 90 | _WEAKREF_GETWEAKREFCOUNT_METHODDEF |
Fred Drake | 7fdc0a1 | 2001-08-16 14:11:30 +0000 | [diff] [blame] | 91 | {"getweakrefs", weakref_getweakrefs, METH_O, |
Fred Drake | 7855aba | 2001-02-18 05:20:18 +0000 | [diff] [blame] | 92 | weakref_getweakrefs__doc__}, |
| 93 | {"proxy", weakref_proxy, METH_VARARGS, |
| 94 | weakref_proxy__doc__}, |
Fred Drake | 41deb1e | 2001-02-01 05:27:45 +0000 | [diff] [blame] | 95 | {NULL, NULL, 0, NULL} |
| 96 | }; |
| 97 | |
| 98 | |
Martin v. Löwis | 1a21451 | 2008-06-11 05:26:20 +0000 | [diff] [blame] | 99 | static struct PyModuleDef weakrefmodule = { |
| 100 | PyModuleDef_HEAD_INIT, |
| 101 | "_weakref", |
| 102 | "Weak-reference support module.", |
| 103 | -1, |
| 104 | weakref_functions, |
| 105 | NULL, |
| 106 | NULL, |
| 107 | NULL, |
| 108 | NULL |
| 109 | }; |
| 110 | |
Mark Hammond | fe51c6d | 2002-08-02 02:27:13 +0000 | [diff] [blame] | 111 | PyMODINIT_FUNC |
Martin v. Löwis | 1a21451 | 2008-06-11 05:26:20 +0000 | [diff] [blame] | 112 | PyInit__weakref(void) |
Fred Drake | 41deb1e | 2001-02-01 05:27:45 +0000 | [diff] [blame] | 113 | { |
| 114 | PyObject *m; |
| 115 | |
Martin v. Löwis | 1a21451 | 2008-06-11 05:26:20 +0000 | [diff] [blame] | 116 | m = PyModule_Create(&weakrefmodule); |
Larry Hastings | 3182680 | 2013-10-19 00:09:25 -0700 | [diff] [blame] | 117 | |
Fred Drake | 41deb1e | 2001-02-01 05:27:45 +0000 | [diff] [blame] | 118 | if (m != NULL) { |
Fred Drake | f7f8cad | 2001-10-05 22:00:24 +0000 | [diff] [blame] | 119 | Py_INCREF(&_PyWeakref_RefType); |
Fred Drake | 0a4dd39 | 2004-07-02 18:57:45 +0000 | [diff] [blame] | 120 | PyModule_AddObject(m, "ref", |
| 121 | (PyObject *) &_PyWeakref_RefType); |
| 122 | Py_INCREF(&_PyWeakref_RefType); |
Fred Drake | 41deb1e | 2001-02-01 05:27:45 +0000 | [diff] [blame] | 123 | PyModule_AddObject(m, "ReferenceType", |
Fred Drake | f7f8cad | 2001-10-05 22:00:24 +0000 | [diff] [blame] | 124 | (PyObject *) &_PyWeakref_RefType); |
| 125 | Py_INCREF(&_PyWeakref_ProxyType); |
Fred Drake | 41deb1e | 2001-02-01 05:27:45 +0000 | [diff] [blame] | 126 | PyModule_AddObject(m, "ProxyType", |
Fred Drake | f7f8cad | 2001-10-05 22:00:24 +0000 | [diff] [blame] | 127 | (PyObject *) &_PyWeakref_ProxyType); |
| 128 | Py_INCREF(&_PyWeakref_CallableProxyType); |
Fred Drake | 41deb1e | 2001-02-01 05:27:45 +0000 | [diff] [blame] | 129 | PyModule_AddObject(m, "CallableProxyType", |
Fred Drake | f7f8cad | 2001-10-05 22:00:24 +0000 | [diff] [blame] | 130 | (PyObject *) &_PyWeakref_CallableProxyType); |
Fred Drake | 41deb1e | 2001-02-01 05:27:45 +0000 | [diff] [blame] | 131 | } |
Martin v. Löwis | 1a21451 | 2008-06-11 05:26:20 +0000 | [diff] [blame] | 132 | return m; |
Fred Drake | 41deb1e | 2001-02-01 05:27:45 +0000 | [diff] [blame] | 133 | } |