1 files changed, 54 insertions, 0 deletions
diff --git a/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-SlabAlloc.c b/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-SlabAlloc.c
new file mode 100644
index 00000000..dc17e734
--- /dev/null
+++ b/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-SlabAlloc.c
@@ -0,0 +1,54 @@
+/* $Id: bs3-cmn-SlabAlloc.c $ */
+/** @file
+ * BS3Kit - Bs3SlabAlloc
+ */
+
+/*
+ * Copyright (C) 2007-2019 Oracle Corporation
+ *
+ * This file is part of VirtualBox Open Source Edition (OSE), as
+ * available from http://www.virtualbox.org. This file is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU
+ * General Public License (GPL) as published by the Free Software
+ * Foundation, in version 2 as it comes in the "COPYING" file of the
+ * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
+ * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
+ * VirtualBox OSE distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#include "bs3kit-template-header.h"
+#include <iprt/asm.h>
+
+
+#undef Bs3SlabAlloc
+BS3_CMN_DEF(void BS3_FAR *, Bs3SlabAlloc,(PBS3SLABCTL pSlabCtl))
+{
+    if (pSlabCtl->cFreeChunks)
+    {
+        int32_t iBit = ASMBitFirstClear(&pSlabCtl->bmAllocated, pSlabCtl->cChunks);
+        if (iBit >= 0)
+        {
+            BS3_XPTR_AUTO(void, pvRet);
+            ASMBitSet(&pSlabCtl->bmAllocated, iBit);
+            pSlabCtl->cFreeChunks  -= 1;
+
+            BS3_XPTR_SET_FLAT(void, pvRet,
+                              BS3_XPTR_GET_FLAT(uint8_t, pSlabCtl->pbStart) + ((uint32_t)iBit << pSlabCtl->cChunkShift));
+            return BS3_XPTR_GET(void, pvRet);
+        }
+    }
+    return NULL;
+}
+