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Be more careful with negative reference counts.

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This commit is contained in:
Guido van Rossum 1990-11-02 17:51:56 +00:00
parent 3d54f2d3d9
commit c8564cde04
1 changed files with 3 additions and 3 deletions
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6
Include/object.h
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@ -56,7 +56,7 @@ whose size is determined when the object is allocated.
#ifdef TRACE_REFS #ifdef TRACE_REFS
#define OB_HEAD \ #define OB_HEAD \
struct _object *_ob_next, *_ob_prev; \ struct _object *_ob_next, *_ob_prev; \
unsigned int ob_refcnt; \ int ob_refcnt; \
struct _typeobject *ob_type; struct _typeobject *ob_type;
#define OB_HEAD_INIT(type) 0, 0, 1, type, #define OB_HEAD_INIT(type) 0, 0, 1, type,
#else #else
@ -200,7 +200,7 @@ extern long ref_total;
#endif #endif
#define INCREF(op) (ref_total++, (op)->ob_refcnt++) #define INCREF(op) (ref_total++, (op)->ob_refcnt++)
#define DECREF(op) \ #define DECREF(op) \
if (--ref_total, --(op)->ob_refcnt != 0) \ if (--ref_total, --(op)->ob_refcnt > 0) \
; \ ; \
else \ else \
DELREF(op) DELREF(op)
@ -208,7 +208,7 @@ extern long ref_total;
#define NEWREF(op) ((op)->ob_refcnt = 1) #define NEWREF(op) ((op)->ob_refcnt = 1)
#define INCREF(op) ((op)->ob_refcnt++) #define INCREF(op) ((op)->ob_refcnt++)
#define DECREF(op) \ #define DECREF(op) \
if (--(op)->ob_refcnt != 0) \ if (--(op)->ob_refcnt > 0) \
; \ ; \
else \ else \
DELREF(op) DELREF(op)