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diff --git a/examples/redis-unstable/src/threads_mngr.h b/examples/redis-unstable/src/threads_mngr.h
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+++ b/examples/redis-unstable/src/threads_mngr.h
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+/*
+ * Copyright (c) 2021-Present, Redis Ltd.
+ * All rights reserved.
+ *
+ * Licensed under your choice of (a) the Redis Source Available License 2.0
+ * (RSALv2); or (b) the Server Side Public License v1 (SSPLv1); or (c) the
+ * GNU Affero General Public License v3 (AGPLv3).
+ */
+
+#pragma once
+
+#include "fmacros.h"
+
+#include <sys/types.h>
+#include <unistd.h>
+
+/** This is an API to invoke callback on a list of threads using a user defined signal handler.
+ * NOTE: This is API is only supported only in linux systems. 
+ * Calling the functions below on any other system does nothing.
+*/
+
+#define THREADS_SIGNAL SIGUSR2
+
+/* Callback signature */
+typedef void(*run_on_thread_cb)(void);
+
+/* Register the process to THREADS_SIGNAL */
+void ThreadsManager_init(void);
+
+/** @brief Invoke callback by each thread in tids.
+ *
+ * @param tids  An array of threads that need to invoke callback.
+ * @param tids_len The number of threads in @param tids.
+ * @param callback A callback to be invoked by each thread in @param tids.
+ *
+ * NOTES:
+ * It is assumed that all the threads don't block or ignore THREADS_SIGNAL.
+ *
+ * It is safe to include the calling thread in @param tids. However, be aware that subsequent tids will
+ * not be signaled until the calling thread returns from the callback invocation.
+ * Hence, it is recommended to place the calling thread last in @param tids.
+ *
+ * The function returns only when @param tids_len threads have returned from @param callback, or when we reached timeout.
+ *
+ * @return 1 if successful, 0 If ThreadsManager_runOnThreads is already in the middle of execution.
+ *
+**/
+
+int ThreadsManager_runOnThreads(pid_t *tids, size_t tids_len, run_on_thread_cb callback);