null.h

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// and just uses malloc/calloc/free.
 
#pragma once
 
#include <stdlib.h>
 
#include <derive-c/alloc/trait.h>
#include <derive-c/core/prelude.h>
 
ZERO_SIZED(nullalloc);
 
static nullalloc NS(nullalloc, get)() { return (nullalloc){}; }
 
static void* NS(nullalloc, malloc)(nullalloc* self, size_t size) {
    (void)size;
    ASSUME(self);
    return NULL;
}
 
static void* NS(nullalloc, realloc)(nullalloc* self, void* ptr, size_t size) {
    (void)size;
    ASSUME(self);
    ASSUME(ptr);
    return NULL;
}
 
static void* NS(nullalloc, calloc)(nullalloc* self, size_t count, size_t size) {
    (void)count;
    (void)size;
    ASSUME(self);
    return NULL;
}
 
static void NS(nullalloc, free)(nullalloc* self, void* ptr) {
    (void)ptr;
    ASSUME(self);
    PANIC("Not possible to free memory from the null allocator, as it allocates nothing")
}
 
TRAIT_ALLOC(nullalloc);