urbit/outside/libuv-v1.7.5/test/test-walk-handles.c

/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
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 * of this software and associated documentation files (the "Software"), to
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 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
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 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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#include "uv.h"
#include "task.h"

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

static char magic_cookie[] = "magic cookie";
static int seen_timer_handle;
static uv_timer_t timer;


static void walk_cb(uv_handle_t* handle, void* arg) {
  ASSERT(arg == (void*)magic_cookie);

  if (handle == (uv_handle_t*)&timer) {
    seen_timer_handle++;
  } else {
    ASSERT(0 && "unexpected handle");
  }
}


static void timer_cb(uv_timer_t* handle) {
  ASSERT(handle == &timer);

  uv_walk(handle->loop, walk_cb, magic_cookie);
  uv_close((uv_handle_t*)handle, NULL);
}


TEST_IMPL(walk_handles) {
  uv_loop_t* loop;
  int r;

  loop = uv_default_loop();

  r = uv_timer_init(loop, &timer);
  ASSERT(r == 0);

  r = uv_timer_start(&timer, timer_cb, 1, 0);
  ASSERT(r == 0);

  /* Start event loop, expect to see the timer handle in walk_cb. */
  ASSERT(seen_timer_handle == 0);
  r = uv_run(loop, UV_RUN_DEFAULT);
  ASSERT(r == 0);
  ASSERT(seen_timer_handle == 1);

  /* Loop is finished, walk_cb should not see our timer handle. */
  seen_timer_handle = 0;
  uv_walk(loop, walk_cb, magic_cookie);
  ASSERT(seen_timer_handle == 0);

  MAKE_VALGRIND_HAPPY();
  return 0;
}