1 files changed, 34 insertions, 0 deletions
diff --git a/third_party/rust/getrandom/src/vxworks.rs b/third_party/rust/getrandom/src/vxworks.rs
new file mode 100644
index 0000000000..6cb5d52fef
--- /dev/null
+++ b/third_party/rust/getrandom/src/vxworks.rs
@@ -0,0 +1,34 @@
+// 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 VxWorks
+use crate::{util_libc::last_os_error, Error};
+use core::sync::atomic::{AtomicBool, Ordering::Relaxed};
+
+pub fn getrandom_inner(dest: &mut [u8]) -> Result<(), Error> {
+    static RNG_INIT: AtomicBool = AtomicBool::new(false);
+    while !RNG_INIT.load(Relaxed) {
+        let ret = unsafe { libc::randSecure() };
+        if ret < 0 {
+            return Err(Error::VXWORKS_RAND_SECURE);
+        } else if ret > 0 {
+            RNG_INIT.store(true, Relaxed);
+            break;
+        }
+        unsafe { libc::usleep(10) };
+    }
+
+    // Prevent overflow of i32
+    for chunk in dest.chunks_mut(i32::max_value() as usize) {
+        let ret = unsafe { libc::randABytes(chunk.as_mut_ptr(), chunk.len() as i32) };
+        if ret != 0 {
+            return Err(last_os_error());
+        }
+    }
+    Ok(())
+}