f3b979b65e
Implemented the idea from D94571 to improve entropy on Linux. Reviewed By: ldionne, #libc Differential Revision: https://reviews.llvm.org/D94953
31 lines
747 B
C++
31 lines
747 B
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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// UNSUPPORTED: libcpp-has-no-random-device
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// <random>
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// class random_device;
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// double entropy() const;
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#include <random>
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#include <cassert>
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#include <climits>
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#include "test_macros.h"
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int main(int, char**) {
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std::random_device r;
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double e = r.entropy();
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assert(e >= 0);
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assert(e <= sizeof(typename std::random_device::result_type) * CHAR_BIT);
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return 0;
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}
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