42 lines
862 B
C
42 lines
862 B
C
/* Copyright (C) 2010, 2011 Tony Garnock-Jones. All rights reserved. */
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#ifndef cmsg_ref_h
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#define cmsg_ref_h
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typedef struct refcount_t_ {
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unsigned int count;
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} refcount_t;
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#define ZERO_REFCOUNT() ((refcount_t) { .count = 0 })
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#define INCREF(x) ({ \
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typeof(x) __x = (x); \
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if (__x != NULL) { \
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__x->refcount.count++; \
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} \
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__x; \
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})
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#define UNGRAB(x) ({ \
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typeof(x) __x = (x); \
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if (__x != NULL) { \
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assert(__x->refcount.count); \
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__x->refcount.count--; \
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} \
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__x; \
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})
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#define DECREF(x, dtor) ({ \
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typeof(x) __x = (x); \
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if (__x != NULL) { \
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assert(__x->refcount.count); \
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(__x->refcount.count)--; \
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if (__x->refcount.count == 0) { \
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(dtor)(__x); \
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} \
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} \
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(typeof(__x)) 0; \
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})
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#endif
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