haiku/docs/develop/kernel/vm_store_null

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static void null_destroy(struct vm_store *store)
Frees this stores space.
static off_t null_commit(struct vm_store *store, off_t size)
Sets committed size to size and returns it.
static int null_has_page(struct vm_store *store, off_t offset)
returns 1.
static ssize_t null_read(struct vm_store *store, off_t offset, iovecs *vecs)
Returns -1.
static ssize_t null_write(struct vm_store *store, off_t offset, iovecs *vecs)
Returns -1.
static int null_fault(struct vm_store *store, struct vm_address_space *aspace, off_t offset)
Returns a Fatal page fault error.
vm_store *vm_store_create_null(void)
Creates an empty vm_store struct.