#ifndef APFL_ALLOC_H
#define APFL_ALLOC_H

#ifdef __cplusplus
extern "C" {
#endif

#include <stddef.h>

#define ALLOCATOR_CALL(a, oldptr, oldsize, newsize) \
    ((a).alloc((a).opaque, (oldptr), (oldsize), (newsize)))

#define ALLOC_BYTES(a, n) (((n) == 0) ? NULL : ALLOCATOR_CALL(a, NULL, 0, (n)))
#define REALLOC_BYTES(a, ptr, old, new) ALLOCATOR_CALL(a, ptr, old, new)
#define FREE_BYTES(a, ptr, n) ALLOCATOR_CALL(a, ptr, n, 0)

#define REALLOC_LIST(a, ptr, old, new) REALLOC_BYTES(a, ptr, sizeof(*ptr) * (old), sizeof(*ptr) * (new))
#define ALLOC_LIST(a, T, len) (T *)ALLOC_BYTES(a, sizeof(T) * (len))
#define FREE_LIST(a, ptr, len) FREE_BYTES(a, ptr, sizeof(*ptr) * (len))

#define ALLOC_OBJ(a, T) ALLOC_LIST(a, T, 1)
#define FREE_OBJ(a, ptr) FREE_LIST(a, ptr, 1)


#ifdef __cplusplus
}
#endif

#endif