refcnt: introduce DEFINE_ATOMIC_REF_UNREF_FUNC() macro and friends
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@ -14,3 +14,41 @@ typedef struct {
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#define REFCNT_DEC(r) (__sync_sub_and_fetch(&(r)._value, 1))
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#define REFCNT_DEC(r) (__sync_sub_and_fetch(&(r)._value, 1))
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#define REFCNT_INIT ((RefCount) { ._value = 1 })
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#define REFCNT_INIT ((RefCount) { ._value = 1 })
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#define _DEFINE_ATOMIC_REF_FUNC(type, name, scope) \
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scope type *name##_ref(type *p) { \
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if (!p) \
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return NULL; \
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\
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assert_se(REFCNT_INC(p->n_ref) >= 2); \
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return p; \
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}
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#define _DEFINE_ATOMIC_UNREF_FUNC(type, name, free_func, scope) \
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scope type *name##_unref(type *p) { \
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if (!p) \
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return NULL; \
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\
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if (REFCNT_DEC(p->n_ref) > 0) \
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return NULL; \
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\
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return free_func(p); \
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}
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#define DEFINE_ATOMIC_REF_FUNC(type, name) \
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_DEFINE_ATOMIC_REF_FUNC(type, name,)
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#define DEFINE_PUBLIC_ATOMIC_REF_FUNC(type, name) \
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_DEFINE_ATOMIC_REF_FUNC(type, name, _public_)
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#define DEFINE_ATOMIC_UNREF_FUNC(type, name, free_func) \
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_DEFINE_ATOMIC_UNREF_FUNC(type, name, free_func,)
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#define DEFINE_PUBLIC_ATOMIC_UNREF_FUNC(type, name, free_func) \
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_DEFINE_ATOMIC_UNREF_FUNC(type, name, free_func, _public_)
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#define DEFINE_ATOMIC_REF_UNREF_FUNC(type, name, free_func) \
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DEFINE_ATOMIC_REF_FUNC(type, name); \
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DEFINE_ATOMIC_UNREF_FUNC(type, name, free_func);
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#define DEFINE_PUBLIC_ATOMIC_REF_UNREF_FUNC(type, name, free_func) \
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DEFINE_PUBLIC_ATOMIC_REF_FUNC(type, name); \
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DEFINE_PUBLIC_ATOMIC_UNREF_FUNC(type, name, free_func);
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