Server : Apache/2.4.41 (Ubuntu) System : Linux absol.cf 5.4.0-198-generic #218-Ubuntu SMP Fri Sep 27 20:18:53 UTC 2024 x86_64 User : www-data ( 33) PHP Version : 7.4.33 Disable Function : pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_get_handler,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,pcntl_async_signals,pcntl_unshare, Directory :  /usr/local/lib/node_modules/mediasoup/worker/deps/libuv/libuv/docs/code/queue-cancel/

Upload File : current_dir [ Writeable ] document_root [ Writeable ]

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

#include <uv.h>

#define FIB_UNTIL 25
uv_loop_t *loop;
uv_work_t fib_reqs[FIB_UNTIL];

long fib_(long t) {
    if (t == 0 || t == 1)
        return 1;
    else
        return fib_(t-1) + fib_(t-2);
}

void fib(uv_work_t *req) {
    int n = *(int *) req->data;
    if (random() % 2)
        sleep(1);
    else
        sleep(3);
    long fib = fib_(n);
    fprintf(stderr, "%dth fibonacci is %lu\n", n, fib);
}

void after_fib(uv_work_t *req, int status) {
    if (status == UV_ECANCELED)
        fprintf(stderr, "Calculation of %d cancelled.\n", *(int *) req->data);
}

void signal_handler(uv_signal_t *req, int signum)
{
    printf("Signal received!\n");
    int i;
    for (i = 0; i < FIB_UNTIL; i++) {
        uv_cancel((uv_req_t*) &fib_reqs[i]);
    }
    uv_signal_stop(req);
}

int main() {
    loop = uv_default_loop();

    int data[FIB_UNTIL];
    int i;
    for (i = 0; i < FIB_UNTIL; i++) {
        data[i] = i;
        fib_reqs[i].data = (void *) &data[i];
        uv_queue_work(loop, &fib_reqs[i], fib, after_fib);
    }

    uv_signal_t sig;
    uv_signal_init(loop, &sig);
    uv_signal_start(&sig, signal_handler, SIGINT);

    return uv_run(loop, UV_RUN_DEFAULT);
}