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#include "qv4memberdata_p.h"
#include <private/qv4mm_p.h>
#include "qv4value_p.h"

using namespace QV4;

DEFINE_MANAGED_VTABLE(MemberData);

void MemberData::markObjects(Heap::Base *that, ExecutionEngine *e)
{
    Heap::MemberData *m = static_cast<Heap::MemberData *>(that);
    for (uint i = 0; i < m->size; ++i)
        m->data[i].mark(e);
}

static Heap::MemberData *reallocateHelper(ExecutionEngine *e, Heap::MemberData *old, uint n)
{
    uint alloc = sizeof(Heap::MemberData) + (n)*sizeof(Value);
    Scope scope(e);
    Scoped<MemberData> newMemberData(scope, e->memoryManager->allocManaged<MemberData>(alloc));
    if (old)
        memcpy(newMemberData->d(), old, sizeof(Heap::MemberData) + old->size * sizeof(Value));
    else
        new (newMemberData->d()) Heap::MemberData;
    newMemberData->d()->size = n;
    return newMemberData->d();
}

Heap::MemberData *MemberData::allocate(ExecutionEngine *e, uint n)
{
    return reallocateHelper(e, 0, n);
}

Heap::MemberData *MemberData::reallocate(ExecutionEngine *e, Heap::MemberData *old, uint n)
{
    uint s = old ? old->size : 0;
    if (n < s)
        return old;

    // n is multiplied by two to leave room for growth
    return reallocateHelper(e, old, qMax((uint)4, 2*n));
}