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b420ed8248
This change gets the Python codebase into a state where it conforms to the conventions of this codebase. It's now possible to include headers from Python, without worrying about ordering. Python has traditionally solved that problem by "diamonding" everything in Python.h, but that's problematic since it means any change to any Python header invalidates all the build artifacts. Lastly it makes tooling not work. Since it is hard to explain to Emacs when I press C-c C-h to add an import line it shouldn't add the header that actually defines the symbol, and instead do follow the nonstandard Python convention. Progress has been made on letting Python load source code from the zip executable structure via the standard C library APIs. System calss now recognizes zip!FILENAME alternative URIs as equivalent to zip:FILENAME since Python uses colon as its delimiter. Some progress has been made on embedding the notice license terms into the Python object code. This is easier said than done since Python has an extremely complicated ownership story. - Some termios APIs have been added - Implement rewinddir() dirstream API - GetCpuCount() API added to Cosmopolitan Libc - More bugs in Cosmopolitan Libc have been fixed - zipobj.com now has flags for mangling the path - Fixed bug a priori with sendfile() on certain BSDs - Polyfill F_DUPFD and F_DUPFD_CLOEXEC across platforms - FIOCLEX / FIONCLEX now polyfilled for fast O_CLOEXEC changes - APE now supports a hybrid solution to no-self-modify for builds - Many BSD-only magnums added, e.g. O_SEARCH, O_SHLOCK, SF_NODISKIO
80 lines
2.7 KiB
C
80 lines
2.7 KiB
C
#ifndef Py_WEAKREFOBJECT_H
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#define Py_WEAKREFOBJECT_H
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#include "third_party/python/Include/object.h"
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COSMOPOLITAN_C_START_
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/* clang-format off */
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typedef struct _PyWeakReference PyWeakReference;
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/* PyWeakReference is the base struct for the Python ReferenceType, ProxyType,
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* and CallableProxyType.
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*/
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#ifndef Py_LIMITED_API
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struct _PyWeakReference {
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PyObject_HEAD
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/* The object to which this is a weak reference, or Py_None if none.
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* Note that this is a stealth reference: wr_object's refcount is
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* not incremented to reflect this pointer.
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*/
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PyObject *wr_object;
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/* A callable to invoke when wr_object dies, or NULL if none. */
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PyObject *wr_callback;
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/* A cache for wr_object's hash code. As usual for hashes, this is -1
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* if the hash code isn't known yet.
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*/
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Py_hash_t hash;
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/* If wr_object is weakly referenced, wr_object has a doubly-linked NULL-
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* terminated list of weak references to it. These are the list pointers.
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* If wr_object goes away, wr_object is set to Py_None, and these pointers
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* have no meaning then.
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*/
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PyWeakReference *wr_prev;
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PyWeakReference *wr_next;
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};
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#endif
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extern PyTypeObject _PyWeakref_RefType;
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extern PyTypeObject _PyWeakref_ProxyType;
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extern PyTypeObject _PyWeakref_CallableProxyType;
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#define PyWeakref_CheckRef(op) PyObject_TypeCheck(op, &_PyWeakref_RefType)
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#define PyWeakref_CheckRefExact(op) \
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(Py_TYPE(op) == &_PyWeakref_RefType)
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#define PyWeakref_CheckProxy(op) \
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((Py_TYPE(op) == &_PyWeakref_ProxyType) || \
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(Py_TYPE(op) == &_PyWeakref_CallableProxyType))
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#define PyWeakref_Check(op) \
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(PyWeakref_CheckRef(op) || PyWeakref_CheckProxy(op))
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PyObject * PyWeakref_NewRef(PyObject *ob,
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PyObject *callback);
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PyObject * PyWeakref_NewProxy(PyObject *ob,
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PyObject *callback);
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PyObject * PyWeakref_GetObject(PyObject *ref);
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#ifndef Py_LIMITED_API
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Py_ssize_t _PyWeakref_GetWeakrefCount(PyWeakReference *head);
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void _PyWeakref_ClearRef(PyWeakReference *self);
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#endif
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/* Explanation for the Py_REFCNT() check: when a weakref's target is part
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of a long chain of deallocations which triggers the trashcan mechanism,
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clearing the weakrefs can be delayed long after the target's refcount
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has dropped to zero. In the meantime, code accessing the weakref will
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be able to "see" the target object even though it is supposed to be
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unreachable. See issue #16602. */
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#define PyWeakref_GET_OBJECT(ref) \
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(Py_REFCNT(((PyWeakReference *)(ref))->wr_object) > 0 \
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? ((PyWeakReference *)(ref))->wr_object \
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: Py_None)
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COSMOPOLITAN_C_END_
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#endif /* !Py_WEAKREFOBJECT_H */
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