/* Copyright libuv 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"

TEST_IMPL(process_priority) {

  int priority;

  int r;

  int i;

#if defined(__MVS__)

  if (uv_os_setpriority(0, 0) == UV_ENOSYS)

    RETURN_SKIP("functionality not supported on zOS");

#endif

  /* Verify that passing a NULL pointer returns UV_EINVAL. */

  r = uv_os_getpriority(0, NULL);

  ASSERT(r == UV_EINVAL);

  /* Verify that all valid values work. */

  for (i = UV_PRIORITY_HIGHEST; i <= UV_PRIORITY_LOW; i++) {

    r = uv_os_setpriority(0, i);

    /* If UV_EACCES is returned, the current user doesn't have permission to

       set this specific priority. */

    if (r == UV_EACCES)

      continue;

    ASSERT(r == 0);

    ASSERT(uv_os_getpriority(0, &priority) == 0);

    /* Verify that the priority values match on Unix, and are range mapped

       on Windows. */

#ifndef _WIN32

    ASSERT(priority == i);

#else

    /* On Windows, only elevated users can set UV_PRIORITY_HIGHEST. Other

       users will silently be set to UV_PRIORITY_HIGH. */

    if (i < UV_PRIORITY_HIGH)

      ASSERT(priority == UV_PRIORITY_HIGHEST || priority == UV_PRIORITY_HIGH);

    else if (i < UV_PRIORITY_ABOVE_NORMAL)

      ASSERT(priority == UV_PRIORITY_HIGH);

    else if (i < UV_PRIORITY_NORMAL)

      ASSERT(priority == UV_PRIORITY_ABOVE_NORMAL);

    else if (i < UV_PRIORITY_BELOW_NORMAL)

      ASSERT(priority == UV_PRIORITY_NORMAL);

    else if (i < UV_PRIORITY_LOW)

      ASSERT(priority == UV_PRIORITY_BELOW_NORMAL);

    else

      ASSERT(priority == UV_PRIORITY_LOW);

#endif

    /* Verify that the current PID and 0 are equivalent. */

    ASSERT(uv_os_getpriority(uv_os_getpid(), &r) == 0);

    ASSERT(priority == r);

  }

  /* Verify that invalid priorities return UV_EINVAL. */

  ASSERT(uv_os_setpriority(0, UV_PRIORITY_HIGHEST - 1) == UV_EINVAL);

  ASSERT(uv_os_setpriority(0, UV_PRIORITY_LOW + 1) == UV_EINVAL);

  return 0;

}