// SPDX-License-Identifier: GPL-2.0
#include <test_progs.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/mman.h>
#include <pthread.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include "test_send_signal_kern.skel.h"

static void sigusr1_handler(int signum)
{
}

#define THREAD_COUNT 100

static void *worker(void *p)
{
        int i;

        for ( i = 0; i < 1000; i++)
                usleep(1);

        return NULL;
}

/* NOTE: cause events loss */
void serial_test_send_signal_sched_switch(void)
{
        struct test_send_signal_kern *skel;
        pthread_t threads[THREAD_COUNT];
        u32 duration = 0;
        int i, err;

        signal(SIGUSR1, sigusr1_handler);

        skel = test_send_signal_kern__open_and_load();
        if (CHECK(!skel, "skel_open_and_load", "skeleton open_and_load failed\n"))
                return;

        skel->bss->pid = getpid();
        skel->bss->sig = SIGUSR1;

        err = test_send_signal_kern__attach(skel);
        if (CHECK(err, "skel_attach", "skeleton attach failed\n"))
                goto destroy_skel;

        for (i = 0; i < THREAD_COUNT; i++) {
                err = pthread_create(threads + i, NULL, worker, NULL);
                if (CHECK(err, "pthread_create", "Error creating thread, %s\n",
                          strerror(errno)))
                        goto destroy_skel;
        }

        for (i = 0; i < THREAD_COUNT; i++)
                pthread_join(threads[i], NULL);

destroy_skel:
        test_send_signal_kern__destroy(skel);
}