mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-09-26 18:29:57 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 10

Add _Py_AS_GC macro. It will be used by the trashcan code on object.c.

Browse source
This commit is contained in:
Neil Schemenauer 2002-03-28 21:06:16 +00:00
parent bd02b14255
commit ef99723b66
1 changed files with 4 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

6
Include/objimpl.h
View file

@ -235,10 +235,12 @@ typedef union _gc_head {
extern PyGC_Head _PyGC_generation0; extern PyGC_Head _PyGC_generation0;
#define _Py_AS_GC(o) ((PyGC_Head *)(o)-1)
/* Tell the GC to track this object. NB: While the object is tracked the /* Tell the GC to track this object. NB: While the object is tracked the
* collector it must be safe to call the ob_traverse method. */ * collector it must be safe to call the ob_traverse method. */
#define _PyObject_GC_TRACK(o) do { \ #define _PyObject_GC_TRACK(o) do { \
PyGC_Head *g = (PyGC_Head *)(o)-1; \ PyGC_Head *g = _Py_AS_GC(o); \
if (g->gc.gc_next != NULL) \ if (g->gc.gc_next != NULL) \
Py_FatalError("GC object already in linked list"); \ Py_FatalError("GC object already in linked list"); \
g->gc.gc_next = &_PyGC_generation0; \ g->gc.gc_next = &_PyGC_generation0; \
@ -249,7 +251,7 @@ extern PyGC_Head _PyGC_generation0;
/* Tell the GC to stop tracking this object. */ /* Tell the GC to stop tracking this object. */
#define _PyObject_GC_UNTRACK(o) do { \ #define _PyObject_GC_UNTRACK(o) do { \
PyGC_Head *g = (PyGC_Head *)(o)-1; \ PyGC_Head *g = _Py_AS_GC(o); \
g->gc.gc_prev->gc.gc_next = g->gc.gc_next; \ g->gc.gc_prev->gc.gc_next = g->gc.gc_next; \
g->gc.gc_next->gc.gc_prev = g->gc.gc_prev; \ g->gc.gc_next->gc.gc_prev = g->gc.gc_prev; \
g->gc.gc_next = NULL; \ g->gc.gc_next = NULL; \