X-Git-Url: https://oss.titaniummirror.com/gitweb?a=blobdiff_plain;f=libstdc%2B%2B-v3%2Ftestsuite%2F25_algorithms%2Frandom_shuffle%2F1.cc;fp=libstdc%2B%2B-v3%2Ftestsuite%2F25_algorithms%2Frandom_shuffle%2F1.cc;h=cd92398a3547a3080e0af8280ebaf545aaa58e57;hb=6fed43773c9b0ce596dca5686f37ac3fc0fa11c0;hp=0000000000000000000000000000000000000000;hpb=27b11d56b743098deb193d510b337ba22dc52e5c;p=msp430-gcc.git diff --git a/libstdc++-v3/testsuite/25_algorithms/random_shuffle/1.cc b/libstdc++-v3/testsuite/25_algorithms/random_shuffle/1.cc new file mode 100644 index 00000000..cd92398a --- /dev/null +++ b/libstdc++-v3/testsuite/25_algorithms/random_shuffle/1.cc @@ -0,0 +1,74 @@ +// Copyright (C) 2001, 2009 Free Software Foundation, Inc. +// +// This file is part of the GNU ISO C++ Library. This library is free +// software; you can redistribute it and/or modify it under the +// terms of the GNU General Public License as published by the +// Free Software Foundation; either version 3, or (at your option) +// any later version. + +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. + +// You should have received a copy of the GNU General Public License along +// with this library; see the file COPYING3. If not see +// . + +// 25.2.11 random_shuffle() + +#include +#include + +bool test __attribute__((unused)) = true; + +const int N = 200000; +int A[N], s1[N]; + +#if _GLIBCXX_PARALLEL +#define TAG , __gnu_parallel::sequential_tag() +#else +#define TAG +#endif + +void fill_ascending() +{ + for (int i = 0; i < N; ++i) + A[i] = i; +} + +void +test01() +{ + fill_ascending(); +#if _GLIBCXX_PARALLEL + for (int num_threads = 1; num_threads <= 2; ++num_threads) + { + omp_set_num_threads(num_threads); +#endif + std::copy(A, A + N, s1); + VERIFY(std::equal(s1, s1 + N, A TAG)); + + std::random_shuffle(s1, s1 + N); + // the chance that random_shuffle leaves the order as is by coincidence + // is negligible, so we expect it to be permuted + VERIFY(!std::equal(s1, s1 + N, A TAG)); + + std::sort(s1, s1 + N TAG); + VERIFY(std::equal(s1, s1 + N, A TAG)); +#if _GLIBCXX_PARALLEL + } +#endif +} + +int +main() +{ +#if _GLIBCXX_PARALLEL + __gnu_parallel::_Settings gpms = __gnu_parallel::_Settings::get(); + gpms.algorithm_strategy = __gnu_parallel::force_parallel; + __gnu_parallel::_Settings::set(gpms); +#endif + test01(); + return 0; +}