45 lines
1.5 KiB
C++
45 lines
1.5 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef TEST_STD_THREAD_CONDITION_CONDVARANY_HELPERS_H
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#define TEST_STD_THREAD_CONDITION_CONDVARANY_HELPERS_H
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#include <chrono>
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#include <cassert>
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#include "test_macros.h"
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#if TEST_STD_VER >= 17
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// wait_for and wait_until function can exit via
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// - predicate is true
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// - timeout
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// - stop_requested
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// The return value only tells if the predicate is true
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// when the function exits, but it does not tell whether
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// it is timeout or stop_requested.
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//
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// ElapsedTimeCheck would fail the test if a test takes
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// longer than a duration. This is useful because we can
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// ensure that the wait_{for, until} function does not
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// wait until the timeout
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struct ElapsedTimeCheck {
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ElapsedTimeCheck(std::chrono::steady_clock::duration timeoutDuration)
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: timeout_(std::chrono::steady_clock::now() + timeoutDuration) {}
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ElapsedTimeCheck(ElapsedTimeCheck&&) = delete;
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ElapsedTimeCheck& operator=(ElapsedTimeCheck&&) = delete;
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~ElapsedTimeCheck() { assert(std::chrono::steady_clock::now() < timeout_); }
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std::chrono::time_point<std::chrono::steady_clock> timeout_;
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};
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#endif
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#endif // TEST_STD_THREAD_CONDITION_CONDVARANY_HELPERS_H
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