1 files changed, 110 insertions, 0 deletions
diff --git a/zencore/sharedbuffer.cpp b/zencore/sharedbuffer.cpp
new file mode 100644
index 000000000..bc991053d
--- /dev/null
+++ b/zencore/sharedbuffer.cpp
@@ -0,0 +1,110 @@
+// Copyright Epic Games, Inc. All Rights Reserved.
+
+#include <zencore/sharedbuffer.h>
+
+#include <doctest/doctest.h>
+#include <memory.h>
+
+#include <atlfile.h>
+#include <gsl/gsl-lite.hpp>
+
+namespace zen {
+
+BufferOwner::~BufferOwner()
+{
+	if (m_IsOwned)
+	{
+		Memory::Free(m_Data);
+	}
+}
+
+//////////////////////////////////////////////////////////////////////////
+
+UniqueBuffer
+UniqueBuffer::Alloc(uint64_t Size)
+{
+	void*		 Buffer = Memory::Alloc(Size, 16);
+	BufferOwner* Owner	= new BufferOwner(Buffer, Size, /* owned */ true);
+
+	return UniqueBuffer(Owner);
+}
+
+UniqueBuffer
+UniqueBuffer::MakeView(void* DataPtr, uint64_t Size)
+{
+	return UniqueBuffer(new BufferOwner(DataPtr, Size, /* owned */ false));
+}
+
+UniqueBuffer::UniqueBuffer(BufferOwner* Owner) : m_buffer(Owner)
+{
+}
+
+//////////////////////////////////////////////////////////////////////////
+
+SharedBuffer::SharedBuffer(UniqueBuffer&& InBuffer) : m_buffer(std::move(InBuffer.m_buffer))
+{
+}
+
+void
+SharedBuffer::MakeOwned()
+{
+	if (IsOwned() || !m_buffer)
+		return;
+
+	const uint64_t Size		= m_buffer->m_Size;
+	void*		   Buffer	= Memory::Alloc(Size, 16);
+	auto		   NewOwner = new BufferOwner(Buffer, Size, /* owned */ true);
+
+	memcpy(Buffer, m_buffer->m_Data, Size);
+
+	m_buffer = NewOwner;
+}
+
+SharedBuffer
+SharedBuffer::MakeView(MemoryView View, SharedBuffer Buffer)
+{
+	// Todo: verify that view is within the shared buffer
+
+	return SharedBuffer(new BufferOwner(const_cast<void*>(View.GetData()), View.GetSize(), /* owned */ false, Buffer.m_buffer));
+}
+
+SharedBuffer
+SharedBuffer::MakeView(const void* Data, uint64_t Size)
+{
+	return SharedBuffer(new BufferOwner(const_cast<void*>(Data), Size, /* owned */ false));
+}
+
+SharedBuffer
+SharedBuffer::Clone()
+{
+	const uint64_t Size		= GetSize();
+	void*		   Buffer	= Memory::Alloc(Size, 16);
+	auto		   NewOwner = new BufferOwner(Buffer, Size, /* owned */ true);
+	memcpy(Buffer, m_buffer->m_Data, Size);
+
+	return SharedBuffer(NewOwner);
+}
+
+SharedBuffer
+SharedBuffer::Clone(MemoryView View)
+{
+	const uint64_t Size		= View.GetSize();
+	void*		   Buffer	= Memory::Alloc(Size, 16);
+	auto		   NewOwner = new BufferOwner(Buffer, Size, /* owned */ true);
+	memcpy(Buffer, View.GetData(), Size);
+
+	return SharedBuffer(NewOwner);
+}
+
+//////////////////////////////////////////////////////////////////////////
+
+void
+sharedbuffer_forcelink()
+{
+}
+
+TEST_CASE("SharedBuffer")
+{
+}
+
+}  // namespace zen