/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ /* * This file is part of the LibreOffice project. * * This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. * * Contributor(s): * Copyright (C) 2012 Tino Kluge */ #include #include #include #include #include #include #include #if defined HAVE_VALGRIND_HEADERS #include #endif // this is nothing but a simple wrapper around // the std::random generators namespace comphelper::rng { // underlying random number generator // std::mt19937 implements the Mersenne twister algorithm which // is fast and has good statistical properties, it produces integers // in the range of [0, 2^32-1] internally // memory requirement: 625*sizeof(uint32_t) // http://en.wikipedia.org/wiki/Mersenne_twister #define STD_RNG_ALGO std::mt19937 namespace { struct RandomNumberGenerator { std::mutex mutex; STD_RNG_ALGO global_rng; RandomNumberGenerator() { // make RR easier to use, breaks easily without the RNG being repeatable bool bRepeatable = (getenv("SAL_RAND_REPEATABLE") != nullptr) || (getenv("RR") != nullptr); // valgrind on some platforms (e.g.Ubuntu16.04) does not support the new Intel RDRAND instructions, // which leads to "Illegal Opcode" errors, so just turn off randomness. #if defined HAVE_VALGRIND_HEADERS if (RUNNING_ON_VALGRIND) bRepeatable = true; #endif if (bRepeatable) { global_rng.seed(42); return; } try { std::random_device rd; // initialises the state of the global random number generator // should only be called once. // (note, a few std::variate_generator<> (like normal) have their // own state which would need a reset as well to guarantee identical // sequence of numbers, e.g. via myrand.distribution().reset()) global_rng.seed(rd() ^ time(nullptr)); } catch (std::runtime_error& e) { SAL_WARN("comphelper", "Using std::random_device failed: " << e.what()); global_rng.seed(time(nullptr)); } } }; RandomNumberGenerator& GetTheRandomNumberGenerator() { static RandomNumberGenerator RANDOM; return RANDOM; } } // uniform ints [a,b] distribution int uniform_int_distribution(int a, int b) { std::uniform_int_distribution dist(a, b); auto& gen = GetTheRandomNumberGenerator(); std::scoped_lock g(gen.mutex); return dist(gen.global_rng); } // uniform ints [a,b] distribution unsigned int uniform_uint_distribution(unsigned int a, unsigned int b) { std::uniform_int_distribution dist(a, b); auto& gen = GetTheRandomNumberGenerator(); std::scoped_lock g(gen.mutex); return dist(gen.global_rng); } // uniform size_t [a,b] distribution size_t uniform_size_distribution(size_t a, size_t b) { std::uniform_int_distribution dist(a, b); auto& gen = GetTheRandomNumberGenerator(); std::scoped_lock g(gen.mutex); return dist(gen.global_rng); } // uniform size_t [a,b) distribution double uniform_real_distribution(double a, double b) { assert(a < b); std::uniform_real_distribution dist(a, b); auto& gen = GetTheRandomNumberGenerator(); std::scoped_lock g(gen.mutex); return dist(gen.global_rng); } } // namespace /* vim:set shiftwidth=4 softtabstop=4 expandtab: */ n> LibreOffice 核心代码仓库文档基金会

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Age	Commit message (Collapse)	Author
2023-04-26	tdf#153789 KJ: icons for Watched Expressions and Call Stack	Rizal Muttaqin
	Change-Id: I9a989e039ae726e413c0a54ab805a0ee7d09c94e Reviewed-on: https://gerrit.libreoffice.org/c/core/+/151007 Tested-by: Jenkins Reviewed-by: Rizal Muttaqin <rizmut@libreoffice.org>
2023-03-17	tdf#126689 Breeze, elementary, KJ, Sifr, Sukapura: Jump + & Jump - This Level	Rizal Muttaqin
	Change-Id: I5f361822048720a68ce2b6fc7246cb7cf7c87fa6 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/148983 Tested-by: Jenkins Reviewed-by: Adolfo Jayme Barrientos <fitojb@ubuntu.com>
2022-09-29	tdf#151197: Remove EmojiControl	Khaled Hosny
	Change-Id: I7fb423727425ec42d1161f6ac5649f5cac82f12f Reviewed-on: https://gerrit.libreoffice.org/c/core/+/140651 Tested-by: Jenkins Reviewed-by: خالد حسني <khaled@aliftype.com>
2022-06-20	KJ: tdf#149008 differentiate Description and Caption icons	Rizal Muttaqin
	Change-Id: I6f02d336c1da9108199a3aa83efe033b84784a48 Reviewed-on: https://gerrit.libreoffice.org/c/core/+/136134 Tested-by: Rizal Muttaqin <rizmut@libreoffice.org> Reviewed-by: Rizal Muttaqin <rizmut@libreoffice.org>