1 files changed, 25 insertions, 0 deletions
diff --git a/library/std/src/sys/random/vxworks.rs b/library/std/src/sys/random/vxworks.rs
new file mode 100644
index 00000000000..d549ccebdb2
--- /dev/null
+++ b/library/std/src/sys/random/vxworks.rs
@@ -0,0 +1,25 @@
+use crate::sync::atomic::AtomicBool;
+use crate::sync::atomic::Ordering::Relaxed;
+
+static RNG_INIT: AtomicBool = AtomicBool::new(false);
+
+pub fn fill_bytes(mut bytes: &mut [u8]) {
+    while !RNG_INIT.load(Relaxed) {
+        let ret = unsafe { libc::randSecure() };
+        if ret < 0 {
+            panic!("failed to generate random data");
+        } else if ret > 0 {
+            RNG_INIT.store(true, Relaxed);
+            break;
+        }
+
+        unsafe { libc::usleep(10) };
+    }
+
+    while !bytes.is_empty() {
+        let len = bytes.len().try_into().unwrap_or(libc::c_int::MAX);
+        let ret = unsafe { libc::randABytes(bytes.as_mut_ptr(), len) };
+        assert!(ret >= 0, "failed to generate random data");
+        bytes = &mut bytes[len as usize..];
+    }
+}