| 1 | //===----------------------------------------------------------------------===//// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===//// |
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| 8 | |
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| 9 | #ifndef TIMER_H |
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| 10 | #define TIMER_H |
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| 11 | |
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| 12 | // Define LIBCXXABI_USE_TIMER to enable testing with a timer. |
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| 13 | #if defined(LIBCXXABI_USE_TIMER) |
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| 14 | |
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| 15 | #include <chrono> |
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| 16 | #include <cstdio> |
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| 17 | |
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| 18 | class timer |
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| 19 | { |
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| 20 | typedef std::chrono::high_resolution_clock Clock; |
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| 21 | typedef Clock::time_point TimePoint; |
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| 22 | typedef std::chrono::microseconds MicroSeconds; |
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| 23 | public: |
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| 24 | timer() : m_start(Clock::now()) {} |
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| 25 | |
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| 26 | timer(timer const &) = delete; |
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| 27 | timer & operator=(timer const &) = delete; |
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| 28 | |
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| 29 | ~timer() |
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| 30 | { |
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| 31 | using std::chrono::duration_cast; |
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| 32 | TimePoint end = Clock::now(); |
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| 33 | MicroSeconds us = duration_cast<MicroSeconds>(end - m_start); |
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| 34 | std::printf("%d microseconds\n" , us.count()); |
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| 35 | } |
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| 36 | |
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| 37 | private: |
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| 38 | TimePoint m_start; |
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| 39 | }; |
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| 40 | |
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| 41 | #else /* LIBCXXABI_USE_TIMER */ |
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| 42 | |
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| 43 | class timer |
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| 44 | { |
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| 45 | public: |
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| 46 | timer() {} |
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| 47 | timer(timer const &) = delete; |
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| 48 | timer & operator=(timer const &) = delete; |
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| 49 | ~timer() {} |
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| 50 | }; |
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| 51 | |
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| 52 | #endif /* LIBCXXABI_USE_TIMER */ |
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| 53 | |
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| 54 | #endif /* TIMER_H */ |
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| 55 | |
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