handletable.cpp revision 45fdb697e9030f33bf5fabea82ca7eeafab2f6af
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * IPRT - Handle Tables.
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * Copyright (C) 2008 Oracle Corporation
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * This file is part of VirtualBox Open Source Edition (OSE), as
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * available from http://www.virtualbox.org. This file is free software;
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * you can redistribute it and/or modify it under the terms of the GNU
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * General Public License (GPL) as published by the Free Software
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * Foundation, in version 2 as it comes in the "COPYING" file of the
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * The contents of this file may alternatively be used under the terms
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * of the Common Development and Distribution License Version 1.0
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * VirtualBox OSE distribution, in which case the provisions of the
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * CDDL are applicable instead of those of the GPL.
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * You may elect to license modified versions of this file under the
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * terms and conditions of either the GPL or the CDDL or both.
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync/*******************************************************************************
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync* Header Files *
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync*******************************************************************************/
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsyncRTDECL(int) RTHandleTableCreateEx(PRTHANDLETABLE phHandleTable, uint32_t fFlags, uint32_t uBase, uint32_t cMax,
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * Validate input.
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync AssertPtrReturn(phHandleTable, VERR_INVALID_POINTER);
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync AssertPtrNullReturn(pfnRetain, VERR_INVALID_POINTER);
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync AssertReturn(!(fFlags & ~RTHANDLETABLE_FLAGS_MASK), VERR_INVALID_PARAMETER);
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync AssertReturn(UINT32_MAX - cMax >= uBase, VERR_INVALID_PARAMETER);
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * Adjust the cMax value so it is a multiple of the 2nd level tables.
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync cMax = ((cMax + RTHT_LEVEL2_ENTRIES - 1) / RTHT_LEVEL2_ENTRIES) * RTHT_LEVEL2_ENTRIES;
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * Allocate the structure, include the 1st level lookup table
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * if it's below the threshold size.
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync cb = RT_ALIGN(cb, sizeof(void *)) + cLevel1 * sizeof(void *);
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * Initialize it.
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync pThis->papvLevel1 = (void **)((uint8_t *)pThis + RT_ALIGN(sizeof(*pThis), sizeof(void *)));
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync pThis->cLevel1 = cLevel1 < RTHT_LEVEL1_DYN_ALLOC_THRESHOLD ? cLevel1 : 0;
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync int rc = RTSpinlockCreate(&pThis->hSpinlock, RTSPINLOCK_FLAGS_INTERRUPT_UNSAFE, "RTHandleTableCreateEx");
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsyncRTDECL(int) RTHandleTableCreate(PRTHANDLETABLE phHandleTable)
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync return RTHandleTableCreateEx(phHandleTable, RTHANDLETABLE_FLAGS_LOCKED, 1, 65534, (PFNRTHANDLETABLERETAIN)NULL, NULL);
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsyncRTDECL(int) RTHandleTableDestroy(RTHANDLETABLE hHandleTable, PFNRTHANDLETABLEDELETE pfnDelete, void *pvUser)
b8e299dddd091ae24e0c08c45d91b8f937bd14d2vboxsync * Validate input, quietly ignore the NIL handle.
return VINF_SUCCESS;
if (pfnDelete)
if (paTable)
for (i = 0; i < RTHT_LEVEL2_ENTRIES; i++)
cLeft--;
if (paTable)
for (i = 0; i < RTHT_LEVEL2_ENTRIES; i++)
cLeft--;
return VINF_SUCCESS;