15c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)/* 25c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * Copyright (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/) 35c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 45c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * Redistribution and use in source and binary forms, with or without 55c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * modification, are permitted provided that the following conditions 65c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * are met: 75c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 1. Redistributions of source code must retain the above copyright 85c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * notice, this list of conditions and the following disclaimer. 95c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 2. Redistributions in binary form must reproduce the above copyright 105c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * notice, this list of conditions and the following disclaimer in the 115c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * documentation and/or other materials provided with the distribution. 125c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 135c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 145c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 155c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 165c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 175c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 185c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 195c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 205c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 215c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 225c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 2302772c6a72f1ee0b226341a4f4439970c29fc861Ben Murdoch * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 245c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) */ 255c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 265c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#ifndef WTF_RandomNumberSeed_h 275c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#define WTF_RandomNumberSeed_h 285c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 29926b001d589ce2f10facb93dd4b87578ea35a855Torne (Richard Coles)#include "RandomNumber.h" 305c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#include <stdlib.h> 315c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#include <time.h> 325c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 335c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#if HAVE(SYS_TIME_H) 345c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#include <sys/time.h> 355c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#endif 365c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 375c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#if OS(UNIX) 385c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#include <sys/types.h> 395c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#include <unistd.h> 405c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#endif 415c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 425c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)namespace WTF { 435c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 445c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)inline void initializeRandomNumberGenerator() 455c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles){ 465c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#if OS(DARWIN) 475c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // On Darwin we use arc4random which initialises itself. 485c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#elif COMPILER(MSVC) && defined(_CRT_RAND_S) 495c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // On Windows we use rand_s which initialises itself 505c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#elif OS(UNIX) 515c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // srandomdev is not guaranteed to exist on linux so we use this poor seed, this should be improved 525c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) timeval time; 535c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) gettimeofday(&time, 0); 545c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) srandom(static_cast<unsigned>(time.tv_usec * getpid())); 555c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#else 565c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) srand(static_cast<unsigned>(time(0))); 575c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#endif 585c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 595c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} 605c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 615c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} 625c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 635c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#endif 64