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v261
src/basic/cleanup-util.h
105 строк
5 KB
Daan De Meyer
tree-wide: standardize header names across src/fundamental, src/basic and src/shared
21 май 2026, 04:33
21 май 2026, 04:33
74d392e
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/* SPDX-License-Identifier: LGPL-2.1-or-later */ #pragma once #include "../fundamental/assert-util.h" #include "../fundamental/cleanup-util.h" /* IWYU pragma: export */ typedef void (*free_func_t)(void *p); typedef void* (*mfree_func_t)(void *p); #define free_and_replace_full(a, b, free_func) \ ({ \ typeof(a)* _a = &(a); \ typeof(b)* _b = &(b); \ free_func(*_a); \ *_a = *_b; \ *_b = NULL; \ 0; \ }) /* This is similar to free_and_replace_full(), but NULL is not assigned to 'b', and its reference counter is * increased. */ #define unref_and_replace_new_ref(a, b, ref_func, unref_func) \ ({ \ typeof(a)* _a = &(a); \ typeof(b) _b = ref_func(b); \ unref_func(*_a); \ *_a = _b; \ 0; \ }) #define _DEFINE_TRIVIAL_REF_FUNC(type, name, scope) \ scope type *name##_ref(type *p) { \ if (!p) \ return NULL; \ \ /* For type check. */ \ unsigned *q = &p->n_ref; \ assert(*q > 0); \ assert_se(*q < UINT_MAX); \ \ (*q)++; \ return p; \ } #define _DEFINE_TRIVIAL_UNREF_FUNC(type, name, free_func, scope) \ scope type *name##_unref(type *p) { \ if (!p) \ return NULL; \ \ assert(p->n_ref > 0); \ p->n_ref--; \ if (p->n_ref > 0) \ return NULL; \ \ return free_func(p); \ } #define DEFINE_TRIVIAL_REF_FUNC(type, name) \ _DEFINE_TRIVIAL_REF_FUNC(type, name,) #define DEFINE_PRIVATE_TRIVIAL_REF_FUNC(type, name) \ _DEFINE_TRIVIAL_REF_FUNC(type, name, static) #define DEFINE_PUBLIC_TRIVIAL_REF_FUNC(type, name) \ _DEFINE_TRIVIAL_REF_FUNC(type, name, _public_) #define DEFINE_TRIVIAL_UNREF_FUNC(type, name, free_func) \ _DEFINE_TRIVIAL_UNREF_FUNC(type, name, free_func,) #define DEFINE_PRIVATE_TRIVIAL_UNREF_FUNC(type, name, free_func) \ _DEFINE_TRIVIAL_UNREF_FUNC(type, name, free_func, static) #define DEFINE_PUBLIC_TRIVIAL_UNREF_FUNC(type, name, free_func) \ _DEFINE_TRIVIAL_UNREF_FUNC(type, name, free_func, _public_) #define DEFINE_TRIVIAL_REF_UNREF_FUNC(type, name, free_func) \ DEFINE_TRIVIAL_REF_FUNC(type, name); \ DEFINE_TRIVIAL_UNREF_FUNC(type, name, free_func); #define DECLARE_TRIVIAL_REF_FUNC(type, name) \ type* name##_ref(type *p) #define DECLARE_TRIVIAL_UNREF_FUNC(type, name) \ type* name##_unref(type *p) #define DECLARE_TRIVIAL_REF_UNREF_FUNC(type, name) \ DECLARE_TRIVIAL_REF_FUNC(type, name); \ DECLARE_TRIVIAL_UNREF_FUNC(type, name) #define DEFINE_PRIVATE_TRIVIAL_REF_UNREF_FUNC(type, name, free_func) \ DEFINE_PRIVATE_TRIVIAL_REF_FUNC(type, name); \ DEFINE_PRIVATE_TRIVIAL_UNREF_FUNC(type, name, free_func); #define DEFINE_PUBLIC_TRIVIAL_REF_UNREF_FUNC(type, name, free_func) \ DEFINE_PUBLIC_TRIVIAL_REF_FUNC(type, name); \ DEFINE_PUBLIC_TRIVIAL_UNREF_FUNC(type, name, free_func); typedef void (*void_func_t)(void); static inline void dispatch_void_func(void_func_t *f) { assert(f); assert(*f); (*f)(); } /* Inspired by Go's "defer" construct, but much more basic. This basically just calls a void function when * the current scope is left. Doesn't do function parameters (i.e. no closures). */ #define DEFER_VOID_CALL(x) _DEFER_VOID_CALL(UNIQ, x) #define _DEFER_VOID_CALL(uniq, x) _unused_ _cleanup_(dispatch_void_func) void_func_t UNIQ_T(defer, uniq) = (x)