Move Source/WTF/wtf to Source/wtf

Source/WTF/wtf/RandomNumberSeed.h

-/*
- * Copyright (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
- * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
- */
-
-#ifndef WTF_RandomNumberSeed_h
-#define WTF_RandomNumberSeed_h
-
-#include "RandomNumber.h"
-#include <stdlib.h>
-#include <time.h>
-
-#if HAVE(SYS_TIME_H)
-#include <sys/time.h>
-#endif
-
-#if OS(UNIX)
-#include <sys/types.h>
-#include <unistd.h>
-#endif
-
-namespace WTF {
-
-inline void initializeRandomNumberGenerator()
-{
-#if OS(DARWIN)
-    // On Darwin we use arc4random which initialises itself.
-#elif OS(WINCE)
-    // initialize rand()
-    srand(GetTickCount());
-#elif COMPILER(MSVC) && defined(_CRT_RAND_S)
-    // On Windows we use rand_s which initialises itself
-#elif OS(UNIX)
-    // srandomdev is not guaranteed to exist on linux so we use this poor seed, this should be improved
-    timeval time;
-    gettimeofday(&time, 0);
-    srandom(static_cast<unsigned>(time.tv_usec * getpid()));
-#else
-    srand(static_cast<unsigned>(time(0)));
-#endif
-
-#if !USE(OS_RANDOMNESS)
-    uint64_t seed = static_cast<uint64_t>(rand()) << 32 | static_cast<uint64_t>(rand());
-    Internal::initializeRandomNumber(seed);
-#endif
-}
-
-}
-
-#endif