48 lines
1.9 KiB
C
48 lines
1.9 KiB
C
#ifndef ALLOCATOR_H
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#define ALLOCATOR_H
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#include <stddef.h>
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#include <stdlib.h>
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// Contains all operations an allocator can do. Similar interface to sdtlibs
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// malloc, realloc and free.
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typedef struct allocator_vtbl {
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void *(*alloc)(void *this, size_t bytes, const char *file, int line);
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void *(*resize)(void *this, void *old_ptr, size_t bytes, const char *file, int line);
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void (*free)(void *this, void *ptr, const char *file, int line);
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} allocator_vtbl_t;
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// An instance of an allocator.
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typedef struct allocator {
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// pointer to the behind-the-scenes data that an allocator may store.
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void *const this;
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// pointer to the method implementations of an allocator.
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const allocator_vtbl_t *const vtbl;
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} allocator_t;
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void *allocator_alloc_func(allocator_t this, size_t bytes, const char *file, int line);
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void *allocator_resize_func(allocator_t this, void *old_ptr, size_t bytes, const char *file, int line);
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void allocator_free_func(allocator_t this, void *ptr, const char *file, int line);
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#define allocator_alloc(this, bytes) allocator_alloc_func(this, bytes, __FILE__, __LINE__)
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#define allocator_resize(this, old_ptr, bytes) allocator_resize_func(this, old_ptr, bytes, __FILE__, __LINE__)
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#define allocator_free(this, ptr) allocator_free_func(this, ptr, __FILE__, __LINE__)
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extern const allocator_t allocator_stdlib;
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#ifdef ALLOCATOR_IMPLEMENTATION
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void *allocator_alloc_func(allocator_t this, size_t bytes, const char *file, int line) {
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return this.vtbl->alloc(this.this, bytes, file, line);
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}
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void *allocator_resize_func(allocator_t this, void *old_ptr, size_t bytes, const char *file, int line) {
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return this.vtbl->resize(this.this, old_ptr, bytes, file, line);
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}
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void allocator_free_func(allocator_t this, void *ptr, const char *file, int line) {
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this.vtbl->free(this.this, ptr, file, line);
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}
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#include "std_allocator.c"
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#endif // ALLOCATOR_IMPLEMENTATION
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#endif // ALLOCATOR_H
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