1 files changed, 0 insertions, 171 deletions
diff --git a/examples/redis-unstable/src/threads_mngr.c b/examples/redis-unstable/src/threads_mngr.c
deleted file mode 100644
index dec83e3..0000000
--- a/examples/redis-unstable/src/threads_mngr.c
+++ /dev/null
@@ -1,171 +0,0 @@
-/*
- * 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).
- */
-
-#include "threads_mngr.h"
-/* Anti-warning macro... */
-#define UNUSED(V) ((void) V)
-
-#ifdef __linux__
-#include "atomicvar.h"
-#include "server.h"
-
-#include <signal.h>
-#include <time.h>
-#include <sys/syscall.h>
-
-#define IN_PROGRESS 1
-static const clock_t RUN_ON_THREADS_TIMEOUT = 2;
-
-/*================================= Globals ================================= */
-
-static redisAtomic run_on_thread_cb g_callback = NULL;
-static redisAtomic size_t g_tids_len = 0;
-static redisAtomic size_t g_num_threads_done = 0;
-
-/* This flag is set while ThreadsManager_runOnThreads is running */
-static redisAtomic int g_in_progress = 0;
-
-/*============================ Internal prototypes ========================== */
-
-static void invoke_callback(int sig);
-/* returns 0 if it is safe to start, IN_PROGRESS otherwise. */
-static int test_and_start(void);
-static void wait_threads(void);
-/* Clean up global variable.
-Assuming we are under the g_in_progress protection, this is not a thread-safe function */
-static void ThreadsManager_cleanups(void);
-
-/*============================ API functions implementations ========================== */
-
-void ThreadsManager_init(void) {
-    /* Register signal handler */
-    struct sigaction act;
-    sigemptyset(&act.sa_mask);
-    /* Not setting SA_RESTART flag means that If a signal handler is invoked while a
-    system call or library function call is blocked, use the default behavior
-    i.e., the call fails with the error EINTR */
-    act.sa_flags = 0;
-    act.sa_handler = invoke_callback;
-    sigaction(SIGUSR2, &act, NULL);
-}
-
-__attribute__ ((noinline))
-int ThreadsManager_runOnThreads(pid_t *tids, size_t tids_len, run_on_thread_cb callback) {
-    /* Check if it is safe to start running. If not - return */
-    if(test_and_start() == IN_PROGRESS) {
-        return 0;
-    }
-
-    /* Update g_callback */
-    atomicSet(g_callback, callback);
-
-    /* Set g_tids_len */
-    atomicSet(g_tids_len, tids_len);
-
-    /* set g_num_threads_done to 0 To handler the case where in the previous run we reached the timeout
-    and called ThreadsManager_cleanups before one or more threads were done and increased
-    (the already set to 0) g_num_threads_done */
-    atomicSet(g_num_threads_done, 0);
-
-    /* Send signal to all the threads in tids */
-    pid_t pid = getpid();
-    for (size_t i = 0; i < tids_len ; ++i) {
-        syscall(SYS_tgkill, pid, tids[i], THREADS_SIGNAL);
-    }
-
-    /* Wait for all the threads to write to the output array, or until timeout is reached */
-    wait_threads();
-
-    /* Cleanups to allow next execution */
-    ThreadsManager_cleanups();
-
-    return 1;
-}
-
-/*============================ Internal functions implementations ========================== */
-
-
-static int test_and_start(void) {
-    /* atomicFlagGetSet sets the variable to 1 and returns the previous value */
-    int prev_state;
-    atomicFlagGetSet(g_in_progress, prev_state);
-
-    /* If prev_state is 1, g_in_progress was on. */
-    return prev_state;
-}
-
-__attribute__ ((noinline))
-static void invoke_callback(int sig) {
-    UNUSED(sig);
-
-    run_on_thread_cb callback;
-    atomicGet(g_callback, callback);
-    if (callback) {
-        callback();
-        atomicIncr(g_num_threads_done, 1);
-    } else {
-        serverLogFromHandler(LL_WARNING, "tid %ld: ThreadsManager g_callback is NULL", syscall(SYS_gettid));
-    }
-}
-
-static void wait_threads(void) {
-    struct timespec timeout_time;
-    clock_gettime(CLOCK_REALTIME, &timeout_time);
-
-    /* calculate relative time until timeout */
-    timeout_time.tv_sec += RUN_ON_THREADS_TIMEOUT;
-
-    /* Wait until all threads are done to invoke the callback or until we reached the timeout */
-    size_t curr_done_count;
-    struct timespec curr_time;
-    size_t tids_len;
-
-    do {
-        struct timeval tv = {
-            .tv_sec = 0,
-            .tv_usec = 10};
-        /* Sleep a bit to yield to other threads. */
-        /* usleep isn't listed as signal safe, so we use select instead */
-        select(0, NULL, NULL, NULL, &tv);
-        atomicGet(g_num_threads_done, curr_done_count);
-        clock_gettime(CLOCK_REALTIME, &curr_time);
-        atomicGet(g_tids_len, tids_len);
-    } while (curr_done_count < tids_len &&
-             curr_time.tv_sec <= timeout_time.tv_sec);
-
-    if (curr_time.tv_sec > timeout_time.tv_sec) {
-        serverLogRawFromHandler(LL_WARNING, "wait_threads(): waiting threads timed out");
-    }
-
-}
-
-static void ThreadsManager_cleanups(void) {
-    atomicSet(g_callback, NULL);
-    atomicSet(g_tids_len, 0);
-    atomicSet(g_num_threads_done, 0);
-
-    /* Lastly, turn off g_in_progress */
-    atomicSet(g_in_progress, 0);
-
-}
-#else
-
-void ThreadsManager_init(void) {
-    /* DO NOTHING */
-}
-
-int ThreadsManager_runOnThreads(pid_t *tids, size_t tids_len, run_on_thread_cb callback) {
-    /* DO NOTHING */
-    UNUSED(tids);
-    UNUSED(tids_len);
-    UNUSED(callback);
-    return 1;
-}
-
-#endif /* __linux__ */