/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 * vim: set ts=8 sts=4 et sw=4 tw=99:
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef gc_StoreBuffer_inl_h
#define gc_StoreBuffer_inl_h

#include "gc/StoreBuffer.h"

#include "gc/Cell.h"
#include "gc/Heap.h"

#include "gc/Heap-inl.h"

namespace js {
namespace gc {

inline /* static */ size_t
ArenaCellSet::getCellIndex(const TenuredCell* cell)
{
    uintptr_t cellOffset = uintptr_t(cell) & ArenaMask;
    MOZ_ASSERT(cellOffset % ArenaCellIndexBytes == 0);
    return cellOffset / ArenaCellIndexBytes;
}

inline /* static */ void
ArenaCellSet::getWordIndexAndMask(size_t cellIndex, size_t* wordp, uint32_t* maskp)
{
    BitArray<MaxArenaCellIndex>::getIndexAndMask(cellIndex, wordp, maskp);
}

inline bool
ArenaCellSet::hasCell(size_t cellIndex) const
{
    MOZ_ASSERT(cellIndex < MaxArenaCellIndex);
    return bits.get(cellIndex);
}

inline void
ArenaCellSet::putCell(size_t cellIndex)
{
    MOZ_ASSERT(cellIndex < MaxArenaCellIndex);
    MOZ_ASSERT(arena);

    bits.set(cellIndex);
    check();
}

inline void
ArenaCellSet::check() const
{
#ifdef DEBUG
    bool bitsZero = bits.isAllClear();
    MOZ_ASSERT(isEmpty() == bitsZero);
    MOZ_ASSERT(isEmpty() == !arena);
    if (!isEmpty()) {
        MOZ_ASSERT(IsCellPointerValid(arena));
        MOZ_ASSERT(arena->bufferedCells() == this);
        JSRuntime* runtime = arena->zone->runtimeFromMainThread();
        MOZ_ASSERT(runtime->gc.minorGCCount() == minorGCNumberAtCreation);
    }
#endif
}

inline void
StoreBuffer::WholeCellBuffer::put(const Cell* cell)
{
    MOZ_ASSERT(cell->isTenured());

    Arena* arena = cell->asTenured().arena();
    ArenaCellSet* cells = arena->bufferedCells();
    if (cells->isEmpty()) {
        cells = allocateCellSet(arena);
        if (!cells) {
            return;
        }
    }

    cells->putCell(&cell->asTenured());
    cells->check();
}

inline void
StoreBuffer::putWholeCell(Cell* cell)
{
    bufferWholeCell.put(cell);
}

} // namespace gc
} // namespace js

#endif // gc_StoreBuffer_inl_h
