1 files changed, 8 insertions, 0 deletions
diff --git a/js/util.ts b/js/util.ts
index 09d74aeb0..d4563936f 100644
--- a/js/util.ts
+++ b/js/util.ts
@@ -20,6 +20,14 @@ export function assert(cond: boolean, msg = "assert") {
   }
 }
 
+let cmdIdCounter = 0;
+export function assignCmdId(): number {
+  // TODO(piscisaureus) Safely re-use so they don't overflow.
+  const cmdId = ++cmdIdCounter;
+  assert(cmdId < 2 ** 32, "cmdId overflow");
+  return cmdId;
+}
+
 export function typedArrayToArrayBuffer(ta: TypedArray): ArrayBuffer {
   const ab = ta.buffer.slice(ta.byteOffset, ta.byteOffset + ta.byteLength);
   return ab as ArrayBuffer;