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| author | Daryl McDaniel <edk2-lists@mc2research.org> | 2015-11-07 19:19:19 +0000 |
|---|---|---|
| committer | darylm503 <darylm503@Edk2> | 2015-11-07 19:19:19 +0000 |
| commit | c8042e10763bca064df257547d04ae3dfcdfaf91 (patch) | |
| tree | cd20b9a6bb3c646b05f42fd721dc7a791bcb75a2 /AppPkg/Applications/Python/Python-2.7.10/Include/weakrefobject.h | |
| parent | 3535213aaec279d84bae7da40a4b982ab9fdf89b (diff) | |
| download | edk2-platforms-c8042e10763bca064df257547d04ae3dfcdfaf91.tar.xz | |
AppPkg/Applications/Python/Python-2.7.10: Initial Checkin part 1/5.
The Include, Parser, and Python directories from the cPython 2.7.10 distribution.
These files are unchanged and set the baseline for subsequent commits.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Daryl McDaniel <edk2-lists@mc2research.org>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18737 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'AppPkg/Applications/Python/Python-2.7.10/Include/weakrefobject.h')
| -rw-r--r-- | AppPkg/Applications/Python/Python-2.7.10/Include/weakrefobject.h | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/AppPkg/Applications/Python/Python-2.7.10/Include/weakrefobject.h b/AppPkg/Applications/Python/Python-2.7.10/Include/weakrefobject.h new file mode 100644 index 0000000000..49c23b1034 --- /dev/null +++ b/AppPkg/Applications/Python/Python-2.7.10/Include/weakrefobject.h @@ -0,0 +1,82 @@ +/* Weak references objects for Python. */
+
+#ifndef Py_WEAKREFOBJECT_H
+#define Py_WEAKREFOBJECT_H
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+typedef struct _PyWeakReference PyWeakReference;
+
+/* PyWeakReference is the base struct for the Python ReferenceType, ProxyType,
+ * and CallableProxyType.
+ */
+struct _PyWeakReference {
+ PyObject_HEAD
+
+ /* The object to which this is a weak reference, or Py_None if none.
+ * Note that this is a stealth reference: wr_object's refcount is
+ * not incremented to reflect this pointer.
+ */
+ PyObject *wr_object;
+
+ /* A callable to invoke when wr_object dies, or NULL if none. */
+ PyObject *wr_callback;
+
+ /* A cache for wr_object's hash code. As usual for hashes, this is -1
+ * if the hash code isn't known yet.
+ */
+ long hash;
+
+ /* If wr_object is weakly referenced, wr_object has a doubly-linked NULL-
+ * terminated list of weak references to it. These are the list pointers.
+ * If wr_object goes away, wr_object is set to Py_None, and these pointers
+ * have no meaning then.
+ */
+ PyWeakReference *wr_prev;
+ PyWeakReference *wr_next;
+};
+
+PyAPI_DATA(PyTypeObject) _PyWeakref_RefType;
+PyAPI_DATA(PyTypeObject) _PyWeakref_ProxyType;
+PyAPI_DATA(PyTypeObject) _PyWeakref_CallableProxyType;
+
+#define PyWeakref_CheckRef(op) PyObject_TypeCheck(op, &_PyWeakref_RefType)
+#define PyWeakref_CheckRefExact(op) \
+ (Py_TYPE(op) == &_PyWeakref_RefType)
+#define PyWeakref_CheckProxy(op) \
+ ((Py_TYPE(op) == &_PyWeakref_ProxyType) || \
+ (Py_TYPE(op) == &_PyWeakref_CallableProxyType))
+
+#define PyWeakref_Check(op) \
+ (PyWeakref_CheckRef(op) || PyWeakref_CheckProxy(op))
+
+
+PyAPI_FUNC(PyObject *) PyWeakref_NewRef(PyObject *ob,
+ PyObject *callback);
+PyAPI_FUNC(PyObject *) PyWeakref_NewProxy(PyObject *ob,
+ PyObject *callback);
+PyAPI_FUNC(PyObject *) PyWeakref_GetObject(PyObject *ref);
+
+PyAPI_FUNC(Py_ssize_t) _PyWeakref_GetWeakrefCount(PyWeakReference *head);
+
+PyAPI_FUNC(void) _PyWeakref_ClearRef(PyWeakReference *self);
+
+/* Explanation for the Py_REFCNT() check: when a weakref's target is part
+ of a long chain of deallocations which triggers the trashcan mechanism,
+ clearing the weakrefs can be delayed long after the target's refcount
+ has dropped to zero. In the meantime, code accessing the weakref will
+ be able to "see" the target object even though it is supposed to be
+ unreachable. See issue #16602. */
+
+#define PyWeakref_GET_OBJECT(ref) \
+ (Py_REFCNT(((PyWeakReference *)(ref))->wr_object) > 0 \
+ ? ((PyWeakReference *)(ref))->wr_object \
+ : Py_None)
+
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* !Py_WEAKREFOBJECT_H */
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