84 lines
4.6 KiB
C
84 lines
4.6 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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#pragma once
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#include "cleanup-fundamental.h" /* IWYU pragma: export */
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typedef void (*free_func_t)(void *p);
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typedef void* (*mfree_func_t)(void *p);
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#define free_and_replace_full(a, b, free_func) \
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({ \
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typeof(a)* _a = &(a); \
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typeof(b)* _b = &(b); \
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free_func(*_a); \
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*_a = *_b; \
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*_b = NULL; \
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0; \
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})
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/* This is similar to free_and_replace_full(), but NULL is not assigned to 'b', and its reference counter is
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* increased. */
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#define unref_and_replace_full(a, b, ref_func, unref_func) \
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({ \
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typeof(a)* _a = &(a); \
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typeof(b) _b = ref_func(b); \
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unref_func(*_a); \
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*_a = _b; \
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0; \
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})
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#define _DEFINE_TRIVIAL_REF_FUNC(type, name, scope) \
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/* NOLINTNEXTLINE (readability-inconsistent-declaration-parameter-name) */ \
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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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/* For type check. */ \
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unsigned *q = &p->n_ref; \
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assert(*q > 0); \
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assert_se(*q < UINT_MAX); \
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\
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(*q)++; \
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return p; \
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}
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#define _DEFINE_TRIVIAL_UNREF_FUNC(type, name, free_func, scope) \
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/* NOLINTNEXTLINE (readability-inconsistent-declaration-parameter-name) */ \
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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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assert(p->n_ref > 0); \
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p->n_ref--; \
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if (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_TRIVIAL_REF_FUNC(type, name) \
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_DEFINE_TRIVIAL_REF_FUNC(type, name,)
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#define DEFINE_PRIVATE_TRIVIAL_REF_FUNC(type, name) \
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_DEFINE_TRIVIAL_REF_FUNC(type, name, static)
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#define DEFINE_PUBLIC_TRIVIAL_REF_FUNC(type, name) \
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_DEFINE_TRIVIAL_REF_FUNC(type, name, _public_)
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#define DEFINE_TRIVIAL_UNREF_FUNC(type, name, free_func) \
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_DEFINE_TRIVIAL_UNREF_FUNC(type, name, free_func,)
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#define DEFINE_PRIVATE_TRIVIAL_UNREF_FUNC(type, name, free_func) \
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_DEFINE_TRIVIAL_UNREF_FUNC(type, name, free_func, static)
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#define DEFINE_PUBLIC_TRIVIAL_UNREF_FUNC(type, name, free_func) \
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_DEFINE_TRIVIAL_UNREF_FUNC(type, name, free_func, _public_)
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#define DEFINE_TRIVIAL_REF_UNREF_FUNC(type, name, free_func) \
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DEFINE_TRIVIAL_REF_FUNC(type, name); \
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DEFINE_TRIVIAL_UNREF_FUNC(type, name, free_func);
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#define DEFINE_PRIVATE_TRIVIAL_REF_UNREF_FUNC(type, name, free_func) \
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DEFINE_PRIVATE_TRIVIAL_REF_FUNC(type, name); \
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DEFINE_PRIVATE_TRIVIAL_UNREF_FUNC(type, name, free_func);
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#define DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(type, name, free_func) \
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DEFINE_PUBLIC_TRIVIAL_REF_FUNC(type, name); \
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DEFINE_PUBLIC_TRIVIAL_UNREF_FUNC(type, name, free_func);
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