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-rw-r--r--rust/src/ffi.rs2
1 files changed, 2 insertions, 0 deletions
diff --git a/rust/src/ffi.rs b/rust/src/ffi.rs
index aaa4851e..66e5f70f 100644
--- a/rust/src/ffi.rs
+++ b/rust/src/ffi.rs
@@ -14,6 +14,8 @@
use std::time::{Duration, SystemTime, UNIX_EPOCH};
+pub(crate) const INVALID_REGISTER: u32 = 0xffff_ffff;
+
macro_rules! ffi_wrap {
($n:expr, $b:expr) => {{
use std::panic;