83 lines
3.0 KiB
C++
83 lines
3.0 KiB
C++
/*
|
|
* Copyright (C) 2016 Apple Inc. All rights reserved.
|
|
*
|
|
* 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 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 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.
|
|
*/
|
|
|
|
#include "config.h"
|
|
#include <wtf/FastBitVector.h>
|
|
|
|
#include <wtf/NeverDestroyed.h>
|
|
|
|
namespace WTF {
|
|
|
|
DEFINE_ALLOCATOR_WITH_HEAP_IDENTIFIER(FastBitVector);
|
|
|
|
void FastBitVectorWordOwner::setEqualsSlow(const FastBitVectorWordOwner& other)
|
|
{
|
|
uint32_t* newArray = static_cast<uint32_t*>(
|
|
FastBitVectorMalloc::zeroedMalloc(other.arrayLength() * sizeof(uint32_t)));
|
|
memcpy(newArray, other.m_words, other.arrayLength() * sizeof(uint32_t));
|
|
if (m_words)
|
|
FastBitVectorMalloc::free(m_words);
|
|
m_words = newArray;
|
|
m_numBits = other.m_numBits;
|
|
}
|
|
|
|
void FastBitVectorWordOwner::resizeSlow(size_t numBits)
|
|
{
|
|
size_t newLength = fastBitVectorArrayLength(numBits);
|
|
|
|
RELEASE_ASSERT(newLength >= arrayLength());
|
|
|
|
// Use fastCalloc instead of fastRealloc because we expect the common
|
|
// use case for this method to be initializing the size of the bitvector.
|
|
|
|
uint32_t* newArray = static_cast<uint32_t*>(FastBitVectorMalloc::zeroedMalloc(newLength * sizeof(uint32_t)));
|
|
memcpy(newArray, m_words, arrayLength() * sizeof(uint32_t));
|
|
if (m_words)
|
|
FastBitVectorMalloc::free(m_words);
|
|
m_words = newArray;
|
|
}
|
|
|
|
void FastBitVector::clearRange(size_t begin, size_t end)
|
|
{
|
|
if (end - begin < 32) {
|
|
for (size_t i = begin; i < end; ++i)
|
|
at(i) = false;
|
|
return;
|
|
}
|
|
|
|
size_t endBeginSlop = (begin + 31) & ~31;
|
|
size_t beginEndSlop = end & ~31;
|
|
|
|
for (size_t i = begin; i < endBeginSlop; ++i)
|
|
at(i) = false;
|
|
for (size_t i = beginEndSlop; i < end; ++i)
|
|
at(i) = false;
|
|
for (size_t i = endBeginSlop / 32; i < beginEndSlop / 32; ++i)
|
|
m_words.word(i) = 0;
|
|
}
|
|
|
|
} // namespace WTF
|
|
|