chore: checkpoint before Python removal

vendor/getrandom-0.2.17/src/vxworks.rs

@@ -0,0 +1,29 @@
+//! Implementation for VxWorks
+use crate::{util_libc::last_os_error, Error};
+use core::{
+    mem::MaybeUninit,
+    sync::atomic::{AtomicBool, Ordering::Relaxed},
+};
+
+pub fn getrandom_inner(dest: &mut [MaybeUninit<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() as *mut u8, chunk.len() as i32) };
+        if ret != 0 {
+            return Err(last_os_error());
+        }
+    }
+    Ok(())
+}