Function sys_tkill

components/lwp/lwp_syscall.c:6767–6787

* @brief Sends a signal to a specific thread. * * This system call allows a process to send a signal to a specific thread within the same process. * The signal specified by the `sig` parameter will be delivered to the thread with the ID `tid`. * This function is similar to `kill()`, but it targets a specific thread rather than a process. * * @param[in] tid The thread ID to which the signal

 * @see sys_kill(), sys_sigaction()
 */
sysret_t sys_tkill(int tid, int sig)
{
#ifdef ARCH_MM_MMU
    rt_thread_t thread;
    sysret_t ret;

    /**
     * Brief: Match a tid and do the kill
     *
     * Note: Critical Section
     * - the thread (READ. may be released at the meantime; protected by locked)
     */
    thread = lwp_tid_get_thread_and_inc_ref(tid);
    ret = lwp_thread_signal_kill(thread, sig, SI_USER, 0);
    lwp_tid_dec_ref(thread);

    return ret;
#else
    return lwp_thread_kill((rt_thread_t)tid, sig);
#endif
}

/**
 * @brief Manipulates the signal mask for the current thread.