libuv async demo

async.c

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

uv_loop_t *loop;
uv_async_t async;

void print_progress(uv_async_t *handle, int status /*UNUSED*/) {
  printf("%s\n", (char *)handle->data);
}

void deal(void *data) {
  loop = uv_default_loop();
  uv_async_init(loop, &async, print_progress);
  printf("ok\n");
  uv_run(loop, UV_RUN_NOWAIT);
  return;
}

int main(int argc, char *argv[])
{
  uv_thread_t hare_id;
  uv_thread_create(&hare_id, deal, &async);
  async.data = "hello world\n";
  uv_async_send(&async);
  printf("send\n");
  return 0;
}