#include <errno.h>
#include <mango/handle.h>
#include <mango/task.h>
#include <mango/vm.h>
#include <rosetta/fs.h>
#include <stdbool.h>
#include <sys/mman.h>

int munmap(void *addr, size_t length)
{
	kern_status_t status = KERN_OK;
	kern_handle_t self = KERN_HANDLE_INVALID,
		      address_space = KERN_HANDLE_INVALID;

	status = task_self(&self);
	if (status != KERN_OK) {
		return __set_errno(EPERM);
	}

	status = task_get_address_space(self, &address_space);
	kern_handle_close(self);
	if (status != KERN_OK) {
		return __set_errno(EPERM);
	}

	status = address_space_unmap(address_space, (virt_addr_t)addr, length);

	if (status != KERN_OK) {
		kern_handle_close(address_space);
		return __set_errno(__errno_from_kern_status(status));
	}

	status = address_space_release(
		address_space,
		(virt_addr_t)addr,
		length);
	kern_handle_close(address_space);

	if (status != KERN_OK) {
		return __set_errno(__errno_from_kern_status(status));
	}

	return __set_errno(SUCCESS);
}