fluencelabs/wasmer
1
0
Fork 0
mirror of https://github.com/fluencelabs/wasmer synced 2025-06-29 00:21:34 +00:00
Code Issues Projects Releases Wiki Activity

Create a grow error and refactor grow impl to return result (#191)

Browse Source
This commit is contained in:
Mackenzie Clark
2019-02-22 22:18:59 -08:00
committed by GitHub
parent fa596d2d23
commit 82eef13f41
13 changed files with 250 additions and 112 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
lib/runtime-core/src/units.rs
View File

@ -1,3 +1,4 @@
use crate::error::PageError;
use std::{
fmt,
ops::{Add, Sub},
@ -11,12 +12,16 @@ const WASM_MAX_PAGES: usize = 65_536;
pub struct Pages(pub u32);
impl Pages {
pub fn checked_add(self, rhs: Pages) -> Option<Pages> {
pub fn checked_add(self, rhs: Pages) -> Result<Pages, PageError> {
let added = (self.0 as usize) + (rhs.0 as usize);
if added <= WASM_MAX_PAGES {
Some(Pages(added as u32))
Ok(Pages(added as u32))
} else {
None
Err(PageError::ExceededMaxPages(
self.0 as usize,
rhs.0 as usize,
added,
))
}
}