/* * Copyright (c) 2021-Present, Redis Ltd. * All rights reserved. * * Licensed under your choice of the Redis Source Available License 2.0 * (RSALv2) or the Server Side Public License v1 (SSPLv1). */ #pragma once #include "fmacros.h" #include #include /** 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);