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//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
#ifndef TEST_STD_THREAD_CONDITION_CONDVARANY_HELPERS_H
#define TEST_STD_THREAD_CONDITION_CONDVARANY_HELPERS_H
#include <chrono>
#include <cassert>
#include "test_macros.h"
#if TEST_STD_VER >= 17
// wait_for and wait_until function can exit via
// - predicate is true
// - timeout
// - stop_requested
// The return value only tells if the predicate is true
// when the function exits, but it does not tell whether
// it is timeout or stop_requested.
//
// ElapsedTimeCheck would fail the test if a test takes
// longer than a duration. This is useful because we can
// ensure that the wait_{for, until} function does not
// wait until the timeout
struct ElapsedTimeCheck {
ElapsedTimeCheck(std::chrono::steady_clock::duration timeoutDuration)
: timeout_(std::chrono::steady_clock::now() + timeoutDuration) {}
ElapsedTimeCheck(ElapsedTimeCheck&&) = delete;
ElapsedTimeCheck& operator=(ElapsedTimeCheck&&) = delete;
~ElapsedTimeCheck() { assert(std::chrono::steady_clock::now() < timeout_); }
std::chrono::time_point<std::chrono::steady_clock> timeout_;
};
#endif
#endif // TEST_STD_THREAD_CONDITION_CONDVARANY_HELPERS_H
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