1 files changed, 69 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..22493229
--- /dev/null
+++ b/src/VBox/ValidationKit/bootsectors/bs3kit/bs3-cmn-SlabFree.c
@@ -0,0 +1,69 @@
+/* $Id: bs3-cmn-SlabFree.c $ */
+/** @file
+ * BS3Kit - Bs3SlabFree
+ */
+
+/*
+ * Copyright (C) 2007-2022 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox 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.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+
+/*********************************************************************************************************************************
+*   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;
+}
+