ButterflyInlines.h [plain text]
#ifndef ButterflyInlines_h
#define ButterflyInlines_h
#include "ArrayStorage.h"
#include "Butterfly.h"
#include "CopiedSpaceInlines.h"
#include "CopyVisitor.h"
#include "VM.h"
#include "Structure.h"
namespace JSC {
inline Butterfly* Butterfly::createUninitialized(VM& vm, JSCell* intendedOwner, size_t preCapacity, size_t propertyCapacity, bool hasIndexingHeader, size_t indexingPayloadSizeInBytes)
{
void* temp;
size_t size = totalSize(preCapacity, propertyCapacity, hasIndexingHeader, indexingPayloadSizeInBytes);
RELEASE_ASSERT(vm.heap.tryAllocateStorage(intendedOwner, size, &temp));
Butterfly* result = fromBase(temp, preCapacity, propertyCapacity);
return result;
}
inline Butterfly* Butterfly::create(VM& vm, JSCell* intendedOwner, size_t preCapacity, size_t propertyCapacity, bool hasIndexingHeader, const IndexingHeader& indexingHeader, size_t indexingPayloadSizeInBytes)
{
Butterfly* result = createUninitialized(
vm, intendedOwner, preCapacity, propertyCapacity, hasIndexingHeader,
indexingPayloadSizeInBytes);
if (hasIndexingHeader)
*result->indexingHeader() = indexingHeader;
return result;
}
inline Butterfly* Butterfly::create(VM& vm, JSCell* intendedOwner, Structure* structure)
{
return create(
vm, intendedOwner, 0, structure->outOfLineCapacity(),
structure->hasIndexingHeader(intendedOwner), IndexingHeader(), 0);
}
inline Butterfly* Butterfly::createUninitializedDuringCollection(CopyVisitor& visitor, size_t preCapacity, size_t propertyCapacity, bool hasIndexingHeader, size_t indexingPayloadSizeInBytes)
{
size_t size = totalSize(preCapacity, propertyCapacity, hasIndexingHeader, indexingPayloadSizeInBytes);
Butterfly* result = fromBase(
visitor.allocateNewSpace(size),
preCapacity, propertyCapacity);
return result;
}
inline void* Butterfly::base(Structure* structure)
{
return base(indexingHeader()->preCapacity(structure), structure->outOfLineCapacity());
}
inline Butterfly* Butterfly::createOrGrowPropertyStorage(
Butterfly* oldButterfly, VM& vm, JSCell* intendedOwner, Structure* structure, size_t oldPropertyCapacity, size_t newPropertyCapacity)
{
RELEASE_ASSERT(newPropertyCapacity > oldPropertyCapacity);
if (!oldButterfly)
return create(vm, intendedOwner, 0, newPropertyCapacity, false, IndexingHeader(), 0);
size_t preCapacity = oldButterfly->indexingHeader()->preCapacity(structure);
size_t indexingPayloadSizeInBytes = oldButterfly->indexingHeader()->indexingPayloadSizeInBytes(structure);
bool hasIndexingHeader = structure->hasIndexingHeader(intendedOwner);
Butterfly* result = createUninitialized(
vm, intendedOwner, preCapacity, newPropertyCapacity, hasIndexingHeader, indexingPayloadSizeInBytes);
memcpy(
result->propertyStorage() - oldPropertyCapacity,
oldButterfly->propertyStorage() - oldPropertyCapacity,
totalSize(0, oldPropertyCapacity, hasIndexingHeader, indexingPayloadSizeInBytes));
return result;
}
inline Butterfly* Butterfly::createOrGrowArrayRight(
Butterfly* oldButterfly, VM& vm, JSCell* intendedOwner, Structure* oldStructure,
size_t propertyCapacity, bool hadIndexingHeader, size_t oldIndexingPayloadSizeInBytes,
size_t newIndexingPayloadSizeInBytes)
{
if (!oldButterfly) {
return create(
vm, intendedOwner, 0, propertyCapacity, true, IndexingHeader(),
newIndexingPayloadSizeInBytes);
}
return oldButterfly->growArrayRight(
vm, intendedOwner, oldStructure, propertyCapacity, hadIndexingHeader,
oldIndexingPayloadSizeInBytes, newIndexingPayloadSizeInBytes);
}
inline Butterfly* Butterfly::growArrayRight(
VM& vm, JSCell* intendedOwner, Structure* oldStructure, size_t propertyCapacity,
bool hadIndexingHeader, size_t oldIndexingPayloadSizeInBytes,
size_t newIndexingPayloadSizeInBytes)
{
ASSERT_UNUSED(oldStructure, !indexingHeader()->preCapacity(oldStructure));
ASSERT_UNUSED(oldStructure, hadIndexingHeader == oldStructure->hasIndexingHeader(intendedOwner));
void* theBase = base(0, propertyCapacity);
size_t oldSize = totalSize(0, propertyCapacity, hadIndexingHeader, oldIndexingPayloadSizeInBytes);
size_t newSize = totalSize(0, propertyCapacity, true, newIndexingPayloadSizeInBytes);
if (!vm.heap.tryReallocateStorage(intendedOwner, &theBase, oldSize, newSize))
return 0;
return fromBase(theBase, 0, propertyCapacity);
}
inline Butterfly* Butterfly::growArrayRight(
VM& vm, JSCell* intendedOwner, Structure* oldStructure,
size_t newIndexingPayloadSizeInBytes)
{
return growArrayRight(
vm, intendedOwner, oldStructure, oldStructure->outOfLineCapacity(),
oldStructure->hasIndexingHeader(intendedOwner),
indexingHeader()->indexingPayloadSizeInBytes(oldStructure),
newIndexingPayloadSizeInBytes);
}
inline Butterfly* Butterfly::resizeArray(
VM& vm, JSCell* intendedOwner, size_t propertyCapacity, bool oldHasIndexingHeader,
size_t oldIndexingPayloadSizeInBytes, size_t newPreCapacity, bool newHasIndexingHeader,
size_t newIndexingPayloadSizeInBytes)
{
Butterfly* result = createUninitialized(
vm, intendedOwner, newPreCapacity, propertyCapacity, newHasIndexingHeader,
newIndexingPayloadSizeInBytes);
void* to = result->propertyStorage() - propertyCapacity;
void* from = propertyStorage() - propertyCapacity;
size_t size = std::min(
totalSize(0, propertyCapacity, oldHasIndexingHeader, oldIndexingPayloadSizeInBytes),
totalSize(0, propertyCapacity, newHasIndexingHeader, newIndexingPayloadSizeInBytes));
memcpy(to, from, size);
return result;
}
inline Butterfly* Butterfly::resizeArray(
VM& vm, JSCell* intendedOwner, Structure* structure, size_t newPreCapacity,
size_t newIndexingPayloadSizeInBytes)
{
bool hasIndexingHeader = structure->hasIndexingHeader(intendedOwner);
return resizeArray(
vm, intendedOwner, structure->outOfLineCapacity(), hasIndexingHeader,
indexingHeader()->indexingPayloadSizeInBytes(structure), newPreCapacity,
hasIndexingHeader, newIndexingPayloadSizeInBytes);
}
inline Butterfly* Butterfly::unshift(Structure* structure, size_t numberOfSlots)
{
ASSERT(hasAnyArrayStorage(structure->indexingType()));
ASSERT(numberOfSlots <= indexingHeader()->preCapacity(structure));
unsigned propertyCapacity = structure->outOfLineCapacity();
memmove(
propertyStorage() - numberOfSlots - propertyCapacity,
propertyStorage() - propertyCapacity,
sizeof(EncodedJSValue) * propertyCapacity + sizeof(IndexingHeader) + ArrayStorage::sizeFor(0));
return IndexingHeader::fromEndOf(propertyStorage() - numberOfSlots)->butterfly();
}
inline Butterfly* Butterfly::shift(Structure* structure, size_t numberOfSlots)
{
ASSERT(hasAnyArrayStorage(structure->indexingType()));
unsigned propertyCapacity = structure->outOfLineCapacity();
memmove(
propertyStorage() - propertyCapacity + numberOfSlots,
propertyStorage() - propertyCapacity,
sizeof(EncodedJSValue) * propertyCapacity + sizeof(IndexingHeader) + ArrayStorage::sizeFor(0));
return IndexingHeader::fromEndOf(propertyStorage() + numberOfSlots)->butterfly();
}
}
#endif // ButterflyInlines_h