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/*
* Copyright (C) 2003-2017 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#include "config.h"
#include "ArgList.h"
#include "JSCJSValue.h"
#include "JSObject.h"
#include "JSCInlines.h"
using std::min;
namespace JSC {
void MarkedArgumentBuffer::addMarkSet(JSValue v)
{
if (m_markSet)
return;
Heap* heap = Heap::heap(v);
if (!heap)
return;
m_markSet = &heap->markListSet();
m_markSet->add(this);
}
void ArgList::getSlice(int startIndex, ArgList& result) const
{
if (startIndex <= 0 || startIndex >= m_argCount) {
result = ArgList();
return;
}
result.m_args = m_args + startIndex;
result.m_argCount = m_argCount - startIndex;
}
void MarkedArgumentBuffer::markLists(SlotVisitor& visitor, ListSet& markSet)
{
ListSet::iterator end = markSet.end();
for (ListSet::iterator it = markSet.begin(); it != end; ++it) {
MarkedArgumentBuffer* list = *it;
for (int i = 0; i < list->m_size; ++i)
visitor.appendUnbarriered(JSValue::decode(list->slotFor(i)));
}
}
void MarkedArgumentBuffer::slowEnsureCapacity(size_t requestedCapacity)
{
int newCapacity = Checked<int>(requestedCapacity).unsafeGet();
expandCapacity(newCapacity);
}
void MarkedArgumentBuffer::expandCapacity()
{
int newCapacity = (Checked<int>(m_capacity) * 2).unsafeGet();
expandCapacity(newCapacity);
}
void MarkedArgumentBuffer::expandCapacity(int newCapacity)
{
ASSERT(m_capacity < newCapacity);
size_t size = (Checked<size_t>(newCapacity) * sizeof(EncodedJSValue)).unsafeGet();
EncodedJSValue* newBuffer = static_cast<EncodedJSValue*>(fastMalloc(size));
for (int i = 0; i < m_size; ++i) {
newBuffer[i] = m_buffer[i];
addMarkSet(JSValue::decode(m_buffer[i]));
}
if (EncodedJSValue* base = mallocBase())
fastFree(base);
m_buffer = newBuffer;
m_capacity = newCapacity;
}
void MarkedArgumentBuffer::slowAppend(JSValue v)
{
ASSERT(m_size <= m_capacity);
if (m_size == m_capacity)
expandCapacity();
slotFor(m_size) = JSValue::encode(v);
++m_size;
addMarkSet(v);
}
} // namespace JSC
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