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#pragma once
#include <stddef.h> /* size_t */
struct allocator {
void *(*allocate)(struct allocator *allocator, size_t n);
void (*deallocate)(struct allocator *allocator, void *ptr);
};
extern struct allocator default_allocator;
/* allocator interface */
void *allocator_malloc(struct allocator *allocator, size_t n);
void allocator_free(struct allocator *allocator, void *ptr);
/* helper functions */
char *allocator_strdup(struct allocator *allocator, const char *str);
void *allocator_malloc_zero(struct allocator *allocator, size_t n);
#define ALLOCATE(n) \
allocator_malloc(&allocator_default_allocator, (n))
#define ALLOCATE_ZERO(n) \
allocator_malloc_zero(&allocator_default_allocator, (n))
#define FREE(ptr) \
(allocator_free(&allocator_default_allocator, (ptr)), (ptr) = NULL)
#define NEW(ptr) ((ptr) = ALLOCATE(sizeof *(ptr)))
#define NEW0(ptr) ((ptr) = ALLOCATE_ZERO(sizeof *(ptr)))
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