libc/test/include/sched_test.cpp

//===-- Unittests for sched -----------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#include "test/UnitTest/Test.h"
#include <sched.h>

template <typename T, typename U> struct SameType {
  static constexpr bool value = false;
};

template <typename T> struct SameType<T, T> {
  static constexpr bool value = true;
};

TEST(LlvmLibcSchedTest, HeaderInterface) {
  // Use unevaluated contexts to verify the public macro declarations without
  // requiring this include test to link the helper entrypoints.
  static_assert(SameType<decltype(CPU_ZERO((cpu_set_t *)0)), void>::value, "");
  static_assert(SameType<decltype(CPU_COUNT((cpu_set_t *)0)), int>::value, "");
  static_assert(SameType<decltype(CPU_SET(0, (cpu_set_t *)0)), void>::value,
                "");
  static_assert(SameType<decltype(CPU_ISSET(0, (cpu_set_t *)0)), int>::value,
                "");

  using SchedGetSchedulerT = int(pid_t) noexcept;
  using SchedSetSchedulerT =
      int(pid_t, int, const struct sched_param *) noexcept;

  static_assert(
      SameType<decltype(sched_getscheduler), SchedGetSchedulerT>::value, "");
  static_assert(
      SameType<decltype(sched_setscheduler), SchedSetSchedulerT>::value, "");
}