WebKit/Source/JavaScriptCore/heap/FreeList.cpp at main · WebKit/WebKit · GitHub

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* 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 "FreeList.h"

namespace JSC {

FreeList::FreeList(unsigned cellSize)

: m_cellSize(cellSize)

{

}

FreeList::~FreeList() = default;

void FreeList::clear()

{

m_intervalStart = nullptr;

m_intervalEnd = nullptr;

m_nextInterval = std::bit_cast<FreeCell*>(static_cast<uintptr_t>(1));

m_secret = 0;

m_originalSize = 0;

}

void FreeList::initialize(FreeCell* start, uint64_t secret, unsigned bytes)

{

if (!start) [[unlikely]] {

clear();

return;

}

m_secret = secret;

m_nextInterval = start;

FreeCell::advance(m_secret, m_nextInterval, m_intervalStart, m_intervalEnd);

m_originalSize = bytes;

}

void FreeList::dump(PrintStream& out) const

{

out.print("{nextInterval = ", RawPointer(nextInterval()), ", secret = ", m_secret, ", intervalStart = ", RawPointer(m_intervalStart), ", intervalEnd = ", RawPointer(m_intervalEnd), ", originalSize = ", m_originalSize, "}");

}

} // namespace JSC

WebKit/Source/JavaScriptCore/heap/FreeList.cpp at main · WebKit/WebKit · GitHub

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