| // Copyright 2021 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| use crate::{mm::PAGE_SIZE, types::*}; |
| |
| // TODO: Move this function to somewhere more generic. It doesn't really have |
| // anything to do with the memory manager. |
| pub fn round_up_to_increment(size: usize, increment: usize) -> Result<usize, Errno> { |
| let spare = size % increment; |
| if spare > 0 { |
| size.checked_add(increment - spare).ok_or_else(|| errno!(EINVAL)) |
| } else { |
| Ok(size) |
| } |
| } |
| |
| pub fn round_up_to_system_page_size(size: usize) -> Result<usize, Errno> { |
| round_up_to_increment(size, *PAGE_SIZE as usize) |
| } |
