/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.

 *

 * Permission is hereby granted, free of charge, to any person obtaining a copy

 * of this software and associated documentation files (the "Software"), to

 * deal in the Software without restriction, including without limitation the

 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or

 * sell copies of the Software, and to permit persons to whom the Software is

 * furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in

 * all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING

 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS

 * IN THE SOFTWARE.

 */

#include "uv.h"

#include "task.h"

#include <string.h>

#define FIXTURE "testfile"

static void timer_cb(uv_timer_t* handle);

static void close_cb(uv_handle_t* handle);

static void poll_cb(uv_fs_poll_t* handle,

                    int status,

                    const uv_stat_t* prev,

                    const uv_stat_t* curr);

static void poll_cb_fail(uv_fs_poll_t* handle,

                         int status,

                         const uv_stat_t* prev,

                         const uv_stat_t* curr);

static void poll_cb_noop(uv_fs_poll_t* handle,

                         int status,

                         const uv_stat_t* prev,

                         const uv_stat_t* curr);

static uv_fs_poll_t poll_handle;

static uv_timer_t timer_handle;

static uv_loop_t* loop;

static int poll_cb_called;

static int timer_cb_called;

static int close_cb_called;

static void touch_file(const char* path) {

  static int count;

  FILE* fp;

  int i;

  ASSERT((fp = fopen(FIXTURE, "w+")));

  /* Need to change the file size because the poller may not pick up

   * sub-second mtime changes.

   */

  i = ++count;

  while (i--)

    fputc('*', fp);

  fclose(fp);

}

static void close_cb(uv_handle_t* handle) {

  close_cb_called++;

}

static void timer_cb(uv_timer_t* handle) {

  touch_file(FIXTURE);

  timer_cb_called++;

}

static void poll_cb_fail(uv_fs_poll_t* handle,

                         int status,

                         const uv_stat_t* prev,

                         const uv_stat_t* curr) {

  ASSERT(0 && "fail_cb called");

}

static void poll_cb_noop(uv_fs_poll_t* handle,

                         int status,

                         const uv_stat_t* prev,

                         const uv_stat_t* curr) {

}

static void poll_cb(uv_fs_poll_t* handle,

                    int status,

                    const uv_stat_t* prev,

                    const uv_stat_t* curr) {

  uv_stat_t zero_statbuf;

  memset(&zero_statbuf, 0, sizeof(zero_statbuf));

  ASSERT(handle == &poll_handle);

  ASSERT(1 == uv_is_active((uv_handle_t*) handle));

  ASSERT(prev != NULL);

  ASSERT(curr != NULL);

  switch (poll_cb_called++) {

  case 0:

    ASSERT(status == UV_ENOENT);

    ASSERT(0 == memcmp(prev, &zero_statbuf, sizeof(zero_statbuf)));

    ASSERT(0 == memcmp(curr, &zero_statbuf, sizeof(zero_statbuf)));

    touch_file(FIXTURE);

    break;

  case 1:

    ASSERT(status == 0);

    ASSERT(0 == memcmp(prev, &zero_statbuf, sizeof(zero_statbuf)));

    ASSERT(0 != memcmp(curr, &zero_statbuf, sizeof(zero_statbuf)));

    ASSERT(0 == uv_timer_start(&timer_handle, timer_cb, 20, 0));

    break;

  case 2:

    ASSERT(status == 0);

    ASSERT(0 != memcmp(prev, &zero_statbuf, sizeof(zero_statbuf)));

    ASSERT(0 != memcmp(curr, &zero_statbuf, sizeof(zero_statbuf)));

    ASSERT(0 == uv_timer_start(&timer_handle, timer_cb, 200, 0));

    break;

  case 3:

    ASSERT(status == 0);

    ASSERT(0 != memcmp(prev, &zero_statbuf, sizeof(zero_statbuf)));

    ASSERT(0 != memcmp(curr, &zero_statbuf, sizeof(zero_statbuf)));

    remove(FIXTURE);

    break;

  case 4:

    ASSERT(status == UV_ENOENT);

    ASSERT(0 != memcmp(prev, &zero_statbuf, sizeof(zero_statbuf)));

    ASSERT(0 == memcmp(curr, &zero_statbuf, sizeof(zero_statbuf)));

    uv_close((uv_handle_t*)handle, close_cb);

    break;

  default:

    ASSERT(0);

  }

}

TEST_IMPL(fs_poll) {

  loop = uv_default_loop();

  remove(FIXTURE);

  ASSERT(0 == uv_timer_init(loop, &timer_handle));

  ASSERT(0 == uv_fs_poll_init(loop, &poll_handle));

  ASSERT(0 == uv_fs_poll_start(&poll_handle, poll_cb, FIXTURE, 100));

  ASSERT(0 == uv_run(loop, UV_RUN_DEFAULT));

  ASSERT(poll_cb_called == 5);

  ASSERT(timer_cb_called == 2);

  ASSERT(close_cb_called == 1);

  MAKE_VALGRIND_HAPPY();

  return 0;

}

TEST_IMPL(fs_poll_getpath) {

  char buf[1024];

  size_t len;

  loop = uv_default_loop();

  remove(FIXTURE);

  ASSERT(0 == uv_fs_poll_init(loop, &poll_handle));

  len = sizeof buf;

  ASSERT(UV_EINVAL == uv_fs_poll_getpath(&poll_handle, buf, &len));

  ASSERT(0 == uv_fs_poll_start(&poll_handle, poll_cb_fail, FIXTURE, 100));

  len = sizeof buf;

  ASSERT(0 == uv_fs_poll_getpath(&poll_handle, buf, &len));

  ASSERT(buf[len - 1] != 0);

  ASSERT(buf[len] == '\0');

  ASSERT(0 == memcmp(buf, FIXTURE, len));

  uv_close((uv_handle_t*) &poll_handle, close_cb);

  ASSERT(0 == uv_run(loop, UV_RUN_DEFAULT));

  ASSERT(close_cb_called == 1);

  MAKE_VALGRIND_HAPPY();

  return 0;

}

TEST_IMPL(fs_poll_close_request) {

  uv_loop_t loop;

  uv_fs_poll_t poll_handle;

  remove(FIXTURE);

  ASSERT(0 == uv_loop_init(&loop);;

  ASSERT(0 == uv_fs_poll_init(&loop, &poll_handle));

  ASSERT(0 == uv_fs_poll_start(&poll_handle, poll_cb_fail, FIXTURE, 100));

  uv_close((uv_handle_t*) &poll_handle, close_cb);

  while (close_cb_called == 0)

    uv_run(&loop, UV_RUN_ONCE);

  ASSERT(close_cb_called == 1);

  ASSERT(0 == uv_loop_close(&loop);;

  MAKE_VALGRIND_HAPPY();

  return 0;

}

TEST_IMPL(fs_poll_close_request_multi_start_stop) {

  uv_loop_t loop;

  uv_fs_poll_t poll_handle;

  int i;

  remove(FIXTURE);

  ASSERT(0 == uv_loop_init(&loop);;

  ASSERT(0 == uv_fs_poll_init(&loop, &poll_handle));

  for (i = 0; i < 10; ++i) {

    ASSERT(0 == uv_fs_poll_start(&poll_handle, poll_cb_fail, FIXTURE, 100));

    ASSERT(0 == uv_fs_poll_stop(&poll_handle));

  }

  uv_close((uv_handle_t*) &poll_handle, close_cb);

  while (close_cb_called == 0)

    uv_run(&loop, UV_RUN_ONCE);

  ASSERT(close_cb_called == 1);

  ASSERT(0 == uv_loop_close(&loop);;

  MAKE_VALGRIND_HAPPY();

  return 0;

}

TEST_IMPL(fs_poll_close_request_multi_stop_start) {

  uv_loop_t loop;

  uv_fs_poll_t poll_handle;

  int i;

  remove(FIXTURE);

  ASSERT(0 == uv_loop_init(&loop);;

  ASSERT(0 == uv_fs_poll_init(&loop, &poll_handle));

  for (i = 0; i < 10; ++i) {

    ASSERT(0 == uv_fs_poll_stop(&poll_handle));

    ASSERT(0 == uv_fs_poll_start(&poll_handle, poll_cb_fail, FIXTURE, 100));

  }

  uv_close((uv_handle_t*) &poll_handle, close_cb);

  while (close_cb_called == 0)

    uv_run(&loop, UV_RUN_ONCE);

  ASSERT(close_cb_called == 1);

  ASSERT(0 == uv_loop_close(&loop);;

  MAKE_VALGRIND_HAPPY();

  return 0;

}

TEST_IMPL(fs_poll_close_request_stop_when_active) {

  /* Regression test for https://github.com/libuv/libuv/issues/2287. */

  uv_loop_t loop;

  uv_fs_poll_t poll_handle;

  remove(FIXTURE);

  ASSERT(0 == uv_loop_init(&loop);;

  /* Set up all handles. */

  ASSERT(0 == uv_fs_poll_init(&loop, &poll_handle));

  ASSERT(0 == uv_fs_poll_start(&poll_handle, poll_cb_noop, FIXTURE, 100));

  uv_run(&loop, UV_RUN_ONCE);

  /* Close the timer handle, and do not crash. */

  ASSERT(0 == uv_fs_poll_stop(&poll_handle));

  uv_run(&loop, UV_RUN_ONCE);

  /* Clean up after the test. */

  uv_close((uv_handle_t*) &poll_handle, close_cb);

  uv_run(&loop, UV_RUN_ONCE);

  ASSERT(close_cb_called == 1);

  ASSERT(0 == uv_loop_close(&loop);;

  MAKE_VALGRIND_HAPPY();

  return 0;

}