Lots of stuff

GpD3D/GpMemoryBuffer.cpp

@@ -0,0 +1,49 @@
+#include "GpMemoryBuffer.h"
+
+#include <new>
+
+void *GpMemoryBuffer::Contents()
+{
+	return reinterpret_cast<uint8_t*>(this) + AlignedSize();
+}
+
+size_t GpMemoryBuffer::Size()
+{
+	return m_size;
+}
+
+void GpMemoryBuffer::Destroy()
+{
+	delete[] reinterpret_cast<uint8_t*>(this);
+}
+
+GpMemoryBuffer *GpMemoryBuffer::Create(size_t sz)
+{
+	const size_t allowedSize = SIZE_MAX - AlignedSize();
+	if (sz > allowedSize)
+		return nullptr;
+
+	const size_t bufferSize = GpMemoryBuffer::AlignedSize() + sz;
+
+	uint8_t *buffer = new uint8_t[bufferSize];
+	new (buffer) GpMemoryBuffer(sz);
+
+	return reinterpret_cast<GpMemoryBuffer*>(buffer);
+}
+
+GpMemoryBuffer::GpMemoryBuffer(size_t sz)
+	: m_size(sz)
+{
+}
+
+GpMemoryBuffer::~GpMemoryBuffer()
+{
+}
+
+size_t GpMemoryBuffer::AlignedSize()
+{
+	const size_t paddedSize = (sizeof(GpMemoryBuffer) + PL_SYSTEM_MEMORY_ALIGNMENT - 1);
+	const size_t sz = paddedSize - paddedSize % PL_SYSTEM_MEMORY_ALIGNMENT;
+
+	return sz;
+}