[mirotalksfu] - add upload to s3 recording

app/src/MutexManager.js

@@ -0,0 +1,29 @@
+'use strict';
+
+const { Mutex } = require('async-mutex');
+
+// In-memory file mutex registry
+const fileLocks = new Map();
+
+function getFileMutex(filePath) {
+    if (!fileLocks.has(filePath)) {
+        fileLocks.set(filePath, new Mutex());
+    }
+    return fileLocks.get(filePath);
+}
+
+async function withFileLock(filePath, fn) {
+    const mutex = getFileMutex(filePath);
+    const release = await mutex.acquire();
+
+    try {
+        return await fn();
+    } finally {
+        release();
+        if (!mutex.isLocked()) {
+            fileLocks.delete(filePath); // Clean up when no one is waiting
+        }
+    }
+}
+
+module.exports = { withFileLock };