projects / OpenSPARC-T2-DV / blame
| Commit | Line | Data |
|---|---|---|
| 86530b38 AT |
1 | #ifndef Py_WEAKREFOBJECT_H |
| 2 | #define Py_WEAKREFOBJECT_H | |
| 3 | #ifdef __cplusplus | |
| 4 | extern "C" { | |
| 5 | #endif | |
| 6 | ||
| 7 | ||
| 8 | typedef struct _PyWeakReference PyWeakReference; | |
| 9 | ||
| 10 | /* PyWeakReference is the base struct for the Python ReferenceType, ProxyType, | |
| 11 | * and CallableProxyType. | |
| 12 | */ | |
| 13 | struct _PyWeakReference { | |
| 14 | PyObject_HEAD | |
| 15 | ||
| 16 | /* The object to which this is a weak reference, or Py_None if none. | |
| 17 | * Note that this is a stealth reference: wr_object's refcount is | |
| 18 | * not incremented to reflect this pointer. | |
| 19 | */ | |
| 20 | PyObject *wr_object; | |
| 21 | ||
| 22 | /* A callable to invoke when wr_object dies, or NULL if none. */ | |
| 23 | PyObject *wr_callback; | |
| 24 | ||
| 25 | /* A cache for wr_object's hash code. As usual for hashes, this is -1 | |
| 26 | * if the hash code isn't known yet. | |
| 27 | */ | |
| 28 | long hash; | |
| 29 | ||
| 30 | /* If wr_object is weakly referenced, wr_object has a doubly-linked NULL- | |
| 31 | * terminated list of weak references to it. These are the list pointers. | |
| 32 | * If wr_object goes away, wr_object is set to Py_None, and these pointers | |
| 33 | * have no meaning then. | |
| 34 | */ | |
| 35 | PyWeakReference *wr_prev; | |
| 36 | PyWeakReference *wr_next; | |
| 37 | }; | |
| 38 | ||
| 39 | PyAPI_DATA(PyTypeObject) _PyWeakref_RefType; | |
| 40 | PyAPI_DATA(PyTypeObject) _PyWeakref_ProxyType; | |
| 41 | PyAPI_DATA(PyTypeObject) _PyWeakref_CallableProxyType; | |
| 42 | ||
| 43 | #define PyWeakref_CheckRef(op) PyObject_TypeCheck(op, &_PyWeakref_RefType) | |
| 44 | #define PyWeakref_CheckRefExact(op) \ | |
| 45 | ((op)->ob_type == &_PyWeakref_RefType) | |
| 46 | #define PyWeakref_CheckProxy(op) \ | |
| 47 | (((op)->ob_type == &_PyWeakref_ProxyType) || \ | |
| 48 | ((op)->ob_type == &_PyWeakref_CallableProxyType)) | |
| 49 | ||
| 50 | /* This macro calls PyWeakref_CheckRef() last since that can involve a | |
| 51 | function call; this makes it more likely that the function call | |
| 52 | will be avoided. */ | |
| 53 | #define PyWeakref_Check(op) \ | |
| 54 | (PyWeakref_CheckRef(op) || PyWeakref_CheckProxy(op)) | |
| 55 | ||
| 56 | ||
| 57 | PyAPI_FUNC(PyObject *) PyWeakref_NewRef(PyObject *ob, | |
| 58 | PyObject *callback); | |
| 59 | PyAPI_FUNC(PyObject *) PyWeakref_NewProxy(PyObject *ob, | |
| 60 | PyObject *callback); | |
| 61 | PyAPI_FUNC(PyObject *) PyWeakref_GetObject(PyObject *ref); | |
| 62 | ||
| 63 | PyAPI_FUNC(long) _PyWeakref_GetWeakrefCount(PyWeakReference *head); | |
| 64 | ||
| 65 | PyAPI_FUNC(void) _PyWeakref_ClearRef(PyWeakReference *self); | |
| 66 | ||
| 67 | #define PyWeakref_GET_OBJECT(ref) (((PyWeakReference *)(ref))->wr_object) | |
| 68 | ||
| 69 | ||
| 70 | #ifdef __cplusplus | |
| 71 | } | |
| 72 | #endif | |
| 73 | #endif /* !Py_WEAKREFOBJECT_H */ |