Source codes

1 files changed, 34 insertions, 0 deletions

diff --git a/Whisper/CPU/LargeBuffer.cpp b/Whisper/CPU/LargeBuffer.cpp
new file mode 100644
index 0000000..e124686
--- /dev/null
+++ b/Whisper/CPU/LargeBuffer.cpp
@@ -0,0 +1,34 @@
+#include "stdafx.h"
+#include "LargeBuffer.h"
+using namespace CpuCompute;
+
+void LargeBuffer::deallocate()
+{
+	if( nullptr == pv )
+		return;
+	VirtualFree( pv, 0, MEM_RELEASE );
+	pv = nullptr;
+}
+
+HRESULT LargeBuffer::allocate( size_t cb )
+{
+	deallocate();
+	
+	pv = VirtualAlloc( nullptr, cb, MEM_COMMIT | MEM_RESERVE, PAGE_READWRITE );
+	if( nullptr != pv )
+		return S_OK;
+	return HRESULT_FROM_WIN32( GetLastError() );
+}
+
+HRESULT LargeBuffer::setReadOnly( size_t cb )
+{
+	if( nullptr != pv )
+	{
+		DWORD op = 0;
+		if( VirtualProtect( pv, cb, PAGE_READONLY, &op ) )
+			return S_OK;
+		return HRESULT_FROM_WIN32( GetLastError() );
+	}
+	else
+		return OLE_E_BLANK;
+}
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