initial custom action library, "hello, world" quality

src/installer-ca/dutil/memutil.h

+#pragma once
+//-------------------------------------------------------------------------------------------------
+// <copyright file="memutil.h" company="Outercurve Foundation">
+//   Copyright (c) 2004, Outercurve Foundation.
+//   This software is released under Microsoft Reciprocal License (MS-RL).
+//   The license and further copyright text can be found in the file
+//   LICENSE.TXT at the root directory of the distribution.
+// </copyright>
+// 
+// <summary>
+//    Header for memory helper functions.
+// </summary>
+//-------------------------------------------------------------------------------------------------
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define ReleaseMem(p) if (p) { MemFree(p); }
+#define ReleaseNullMem(p) if (p) { MemFree(p); p = NULL; }
+
+HRESULT DAPI MemInitialize();
+void DAPI MemUninitialize();
+
+LPVOID DAPI MemAlloc(
+    __in SIZE_T cbSize,
+    __in BOOL fZero
+    );
+LPVOID DAPI MemReAlloc(
+    __in LPVOID pv,
+    __in SIZE_T cbSize,
+    __in BOOL fZero
+    );
+
+HRESULT DAPI MemFree(
+    __in LPVOID pv
+    );
+SIZE_T DAPI MemSize(
+    __in LPCVOID pv
+    );
+
+#ifdef __cplusplus
+}
+#endif
+