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/*
* Copyright (C) 2017 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.
*/
#pragma once
#include "MarkedAllocator.h"
namespace JSC {
ALWAYS_INLINE void* MarkedAllocator::tryAllocate(GCDeferralContext* deferralContext)
{
unsigned remaining = m_freeList.remaining;
if (remaining) {
unsigned cellSize = m_cellSize;
remaining -= cellSize;
m_freeList.remaining = remaining;
return m_freeList.payloadEnd - remaining - cellSize;
}
FreeCell* head = m_freeList.head;
if (UNLIKELY(!head))
return tryAllocateSlowCase(deferralContext);
m_freeList.head = head->next;
return head;
}
ALWAYS_INLINE void* MarkedAllocator::allocate(GCDeferralContext* deferralContext)
{
unsigned remaining = m_freeList.remaining;
if (remaining) {
unsigned cellSize = m_cellSize;
remaining -= cellSize;
m_freeList.remaining = remaining;
return m_freeList.payloadEnd - remaining - cellSize;
}
FreeCell* head = m_freeList.head;
if (UNLIKELY(!head))
return allocateSlowCase(deferralContext);
m_freeList.head = head->next;
return head;
}
template <typename Functor> inline void MarkedAllocator::forEachBlock(const Functor& functor)
{
m_live.forEachSetBit(
[&] (size_t index) {
functor(m_blocks[index]);
});
}
template <typename Functor> inline void MarkedAllocator::forEachNotEmptyBlock(const Functor& functor)
{
m_markingNotEmpty.forEachSetBit(
[&] (size_t index) {
functor(m_blocks[index]);
});
}
} // namespace JSC
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