Import getrandom-0.1.14
Change-Id: I2e27b76bb8b37119712eeda01f94641a77cce5fd
diff --git a/src/cloudabi.rs b/src/cloudabi.rs
new file mode 100644
index 0000000..d3d0928
--- /dev/null
+++ b/src/cloudabi.rs
@@ -0,0 +1,25 @@
+// Copyright 2018 Developers of the Rand project.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// https://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+//! Implementation for CloudABI
+use crate::Error;
+use core::num::NonZeroU32;
+
+extern "C" {
+ fn cloudabi_sys_random_get(buf: *mut u8, buf_len: usize) -> u16;
+}
+
+pub fn getrandom_inner(dest: &mut [u8]) -> Result<(), Error> {
+ let errno = unsafe { cloudabi_sys_random_get(dest.as_mut_ptr(), dest.len()) };
+ if let Some(code) = NonZeroU32::new(errno as u32) {
+ error!("cloudabi_sys_random_get: failed with {}", errno);
+ Err(Error::from(code))
+ } else {
+ Ok(()) // Zero means success for CloudABI
+ }
+}