MetaAllocatorHandle.h [plain text]
#pragma once
#include <wtf/Assertions.h>
#include <wtf/MetaAllocatorPtr.h>
#include <wtf/RedBlackTree.h>
#include <wtf/ThreadSafeRefCounted.h>
namespace WTF {
class MetaAllocator;
class PrintStream;
DECLARE_ALLOCATOR_WITH_HEAP_IDENTIFIER(MetaAllocatorHandle);
class MetaAllocatorHandle : public ThreadSafeRefCounted<MetaAllocatorHandle>, public RedBlackTree<MetaAllocatorHandle, void*>::Node {
WTF_MAKE_FAST_ALLOCATED_WITH_HEAP_IDENTIFIER(MetaAllocatorHandle);
private:
MetaAllocatorHandle(MetaAllocator&, void* start, size_t sizeInBytes);
public:
using MemoryPtr = MetaAllocatorPtr<HandleMemoryPtrTag>;
WTF_EXPORT_PRIVATE ~MetaAllocatorHandle();
MemoryPtr start() const
{
return m_start;
}
MemoryPtr end() const
{
return m_end;
}
uintptr_t startAsInteger() const
{
return m_start.untaggedPtr<uintptr_t>();
}
uintptr_t endAsInteger() const
{
return m_end.untaggedPtr<uintptr_t>();
}
size_t sizeInBytes() const
{
return m_end.untaggedPtr<size_t>() - m_start.untaggedPtr<size_t>();
}
bool containsIntegerAddress(uintptr_t address) const
{
return address >= startAsInteger() && address < endAsInteger();
}
bool contains(void* address) const
{
return containsIntegerAddress(reinterpret_cast<uintptr_t>(address));
}
WTF_EXPORT_PRIVATE void shrink(size_t newSizeInBytes);
MetaAllocator& allocator()
{
return m_allocator;
}
void* key()
{
return m_start.untaggedPtr();
}
WTF_EXPORT_PRIVATE void dump(PrintStream& out) const;
private:
friend class MetaAllocator;
MetaAllocator& m_allocator;
MemoryPtr m_start;
MemoryPtr m_end;
};
}