1 files changed, 59 insertions, 0 deletions
diff --git a/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-SlabFree.c b/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-SlabFree.c
new file mode 100644
index 00000000..c17f1659
--- /dev/null
+++ b/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-SlabFree.c
@@ -0,0 +1,59 @@
+/* $Id: bs3-cmn-SlabFree.c $ */
+/** @file
+ * BS3Kit - Bs3SlabFree
+ */
+
+/*
+ * 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 Bs3SlabFree
+BS3_CMN_DEF(uint16_t, Bs3SlabFree,(PBS3SLABCTL pSlabCtl, uint32_t uFlatChunkPtr, uint16_t cChunks))
+{
+    uint16_t cFreed = 0;
+    BS3_ASSERT(cChunks > 0);
+    if (cChunks > 0)
+    {
+        uint16_t iChunk = (uint16_t)((uFlatChunkPtr - BS3_XPTR_GET_FLAT(uint8_t, pSlabCtl->pbStart)) >> pSlabCtl->cChunkShift);
+        BS3_ASSERT(iChunk < pSlabCtl->cChunks);
+        BS3_ASSERT(iChunk + cChunks <= pSlabCtl->cChunks);
+
+        do
+        {
+            if (ASMBitTestAndClear(&pSlabCtl->bmAllocated, iChunk))
+                cFreed++;
+            else
+                BS3_ASSERT(0);
+            iChunk++;
+        } while (--cChunks > 0);
+
+        pSlabCtl->cFreeChunks += cFreed;
+    }
+    return cFreed;
+}
+