forked from KolibriOS/kolibrios
829 lines
25 KiB
C
829 lines
25 KiB
C
/*******************************************************************************
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*
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* Module Name: utdelete - object deletion and reference count utilities
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*
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******************************************************************************/
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/******************************************************************************
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*
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* 1. Copyright Notice
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*
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* Some or all of this work - Copyright (c) 1999 - 2011, Intel Corp.
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* All rights reserved.
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*
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* 2. License
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*
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* 2.1. This is your license from Intel Corp. under its intellectual property
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* rights. You may have additional license terms from the party that provided
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* you this software, covering your right to use that party's intellectual
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* property rights.
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*
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* 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
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* copy of the source code appearing in this file ("Covered Code") an
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* irrevocable, perpetual, worldwide license under Intel's copyrights in the
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* base code distributed originally by Intel ("Original Intel Code") to copy,
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* make derivatives, distribute, use and display any portion of the Covered
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* Code in any form, with the right to sublicense such rights; and
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*
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* 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
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* license (with the right to sublicense), under only those claims of Intel
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* patents that are infringed by the Original Intel Code, to make, use, sell,
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* offer to sell, and import the Covered Code and derivative works thereof
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* solely to the minimum extent necessary to exercise the above copyright
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* license, and in no event shall the patent license extend to any additions
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* to or modifications of the Original Intel Code. No other license or right
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* is granted directly or by implication, estoppel or otherwise;
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*
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* The above copyright and patent license is granted only if the following
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* conditions are met:
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*
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* 3. Conditions
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*
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* 3.1. Redistribution of Source with Rights to Further Distribute Source.
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* Redistribution of source code of any substantial portion of the Covered
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* Code or modification with rights to further distribute source must include
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* the above Copyright Notice, the above License, this list of Conditions,
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* and the following Disclaimer and Export Compliance provision. In addition,
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* Licensee must cause all Covered Code to which Licensee contributes to
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* contain a file documenting the changes Licensee made to create that Covered
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* Code and the date of any change. Licensee must include in that file the
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* documentation of any changes made by any predecessor Licensee. Licensee
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* must include a prominent statement that the modification is derived,
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* directly or indirectly, from Original Intel Code.
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*
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* 3.2. Redistribution of Source with no Rights to Further Distribute Source.
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* Redistribution of source code of any substantial portion of the Covered
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* Code or modification without rights to further distribute source must
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* include the following Disclaimer and Export Compliance provision in the
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* documentation and/or other materials provided with distribution. In
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* addition, Licensee may not authorize further sublicense of source of any
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* portion of the Covered Code, and must include terms to the effect that the
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* license from Licensee to its licensee is limited to the intellectual
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* property embodied in the software Licensee provides to its licensee, and
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* not to intellectual property embodied in modifications its licensee may
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* make.
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*
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* 3.3. Redistribution of Executable. Redistribution in executable form of any
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* substantial portion of the Covered Code or modification must reproduce the
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* above Copyright Notice, and the following Disclaimer and Export Compliance
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* provision in the documentation and/or other materials provided with the
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* distribution.
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*
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* 3.4. Intel retains all right, title, and interest in and to the Original
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* Intel Code.
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*
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* 3.5. Neither the name Intel nor any other trademark owned or controlled by
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* Intel shall be used in advertising or otherwise to promote the sale, use or
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* other dealings in products derived from or relating to the Covered Code
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* without prior written authorization from Intel.
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*
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* 4. Disclaimer and Export Compliance
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*
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* 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
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* HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
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* IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
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* INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
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* UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
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* IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
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* PARTICULAR PURPOSE.
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*
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* 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
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* OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
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* COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
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* SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
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* CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
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* HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
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* SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
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* LIMITED REMEDY.
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*
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* 4.3. Licensee shall not export, either directly or indirectly, any of this
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* software or system incorporating such software without first obtaining any
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* required license or other approval from the U. S. Department of Commerce or
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* any other agency or department of the United States Government. In the
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* event Licensee exports any such software from the United States or
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* re-exports any such software from a foreign destination, Licensee shall
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* ensure that the distribution and export/re-export of the software is in
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* compliance with all laws, regulations, orders, or other restrictions of the
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* U.S. Export Administration Regulations. Licensee agrees that neither it nor
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* any of its subsidiaries will export/re-export any technical data, process,
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* software, or service, directly or indirectly, to any country for which the
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* United States government or any agency thereof requires an export license,
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* other governmental approval, or letter of assurance, without first obtaining
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* such license, approval or letter.
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*
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*****************************************************************************/
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#define __UTDELETE_C__
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#include "acpi.h"
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#include "accommon.h"
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#include "acinterp.h"
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#include "acnamesp.h"
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#include "acevents.h"
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#define _COMPONENT ACPI_UTILITIES
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ACPI_MODULE_NAME ("utdelete")
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/* Local prototypes */
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static void
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AcpiUtDeleteInternalObj (
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ACPI_OPERAND_OBJECT *Object);
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static void
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AcpiUtUpdateRefCount (
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ACPI_OPERAND_OBJECT *Object,
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UINT32 Action);
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/*******************************************************************************
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*
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* FUNCTION: AcpiUtDeleteInternalObj
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*
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* PARAMETERS: Object - Object to be deleted
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*
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* RETURN: None
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*
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* DESCRIPTION: Low level object deletion, after reference counts have been
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* updated (All reference counts, including sub-objects!)
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*
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******************************************************************************/
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static void
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AcpiUtDeleteInternalObj (
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ACPI_OPERAND_OBJECT *Object)
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{
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void *ObjPointer = NULL;
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ACPI_OPERAND_OBJECT *HandlerDesc;
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ACPI_OPERAND_OBJECT *SecondDesc;
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ACPI_OPERAND_OBJECT *NextDesc;
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ACPI_OPERAND_OBJECT **LastObjPtr;
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ACPI_FUNCTION_TRACE_PTR (UtDeleteInternalObj, Object);
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if (!Object)
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{
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return_VOID;
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}
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/*
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* Must delete or free any pointers within the object that are not
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* actual ACPI objects (for example, a raw buffer pointer).
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*/
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switch (Object->Common.Type)
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{
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case ACPI_TYPE_STRING:
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ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "**** String %p, ptr %p\n",
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Object, Object->String.Pointer));
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/* Free the actual string buffer */
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if (!(Object->Common.Flags & AOPOBJ_STATIC_POINTER))
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{
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/* But only if it is NOT a pointer into an ACPI table */
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ObjPointer = Object->String.Pointer;
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}
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break;
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case ACPI_TYPE_BUFFER:
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ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "**** Buffer %p, ptr %p\n",
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Object, Object->Buffer.Pointer));
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/* Free the actual buffer */
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if (!(Object->Common.Flags & AOPOBJ_STATIC_POINTER))
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{
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/* But only if it is NOT a pointer into an ACPI table */
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ObjPointer = Object->Buffer.Pointer;
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}
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break;
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case ACPI_TYPE_PACKAGE:
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ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, " **** Package of count %X\n",
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Object->Package.Count));
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/*
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* Elements of the package are not handled here, they are deleted
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* separately
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*/
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/* Free the (variable length) element pointer array */
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ObjPointer = Object->Package.Elements;
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break;
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/*
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* These objects have a possible list of notify handlers.
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* Device object also may have a GPE block.
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*/
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case ACPI_TYPE_DEVICE:
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if (Object->Device.GpeBlock)
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{
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(void) AcpiEvDeleteGpeBlock (Object->Device.GpeBlock);
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}
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/*lint -fallthrough */
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case ACPI_TYPE_PROCESSOR:
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case ACPI_TYPE_THERMAL:
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/* Walk the notify handler list for this object */
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HandlerDesc = Object->CommonNotify.Handler;
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while (HandlerDesc)
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{
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NextDesc = HandlerDesc->AddressSpace.Next;
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AcpiUtRemoveReference (HandlerDesc);
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HandlerDesc = NextDesc;
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}
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break;
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case ACPI_TYPE_MUTEX:
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ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
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"***** Mutex %p, OS Mutex %p\n",
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Object, Object->Mutex.OsMutex));
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if (Object == AcpiGbl_GlobalLockMutex)
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{
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/* Global Lock has extra semaphore */
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(void) AcpiOsDeleteSemaphore (AcpiGbl_GlobalLockSemaphore);
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AcpiGbl_GlobalLockSemaphore = NULL;
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AcpiOsDeleteMutex (Object->Mutex.OsMutex);
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AcpiGbl_GlobalLockMutex = NULL;
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}
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else
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{
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AcpiExUnlinkMutex (Object);
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AcpiOsDeleteMutex (Object->Mutex.OsMutex);
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}
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break;
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case ACPI_TYPE_EVENT:
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ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
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"***** Event %p, OS Semaphore %p\n",
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Object, Object->Event.OsSemaphore));
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(void) AcpiOsDeleteSemaphore (Object->Event.OsSemaphore);
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Object->Event.OsSemaphore = NULL;
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break;
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case ACPI_TYPE_METHOD:
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ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
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"***** Method %p\n", Object));
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/* Delete the method mutex if it exists */
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if (Object->Method.Mutex)
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{
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AcpiOsDeleteMutex (Object->Method.Mutex->Mutex.OsMutex);
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AcpiUtDeleteObjectDesc (Object->Method.Mutex);
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Object->Method.Mutex = NULL;
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}
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break;
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case ACPI_TYPE_REGION:
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ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
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"***** Region %p\n", Object));
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SecondDesc = AcpiNsGetSecondaryObject (Object);
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if (SecondDesc)
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{
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/*
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* Free the RegionContext if and only if the handler is one of the
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* default handlers -- and therefore, we created the context object
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* locally, it was not created by an external caller.
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*/
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HandlerDesc = Object->Region.Handler;
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if (HandlerDesc)
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{
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NextDesc = HandlerDesc->AddressSpace.RegionList;
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LastObjPtr = &HandlerDesc->AddressSpace.RegionList;
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/* Remove the region object from the handler's list */
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while (NextDesc)
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{
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if (NextDesc == Object)
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{
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*LastObjPtr = NextDesc->Region.Next;
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break;
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}
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/* Walk the linked list of handler */
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LastObjPtr = &NextDesc->Region.Next;
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NextDesc = NextDesc->Region.Next;
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}
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if (HandlerDesc->AddressSpace.HandlerFlags &
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ACPI_ADDR_HANDLER_DEFAULT_INSTALLED)
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{
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/* Deactivate region and free region context */
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if (HandlerDesc->AddressSpace.Setup)
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{
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(void) HandlerDesc->AddressSpace.Setup (Object,
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ACPI_REGION_DEACTIVATE,
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HandlerDesc->AddressSpace.Context,
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&SecondDesc->Extra.RegionContext);
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}
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}
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AcpiUtRemoveReference (HandlerDesc);
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}
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/* Now we can free the Extra object */
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AcpiUtDeleteObjectDesc (SecondDesc);
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}
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break;
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case ACPI_TYPE_BUFFER_FIELD:
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ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
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"***** Buffer Field %p\n", Object));
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SecondDesc = AcpiNsGetSecondaryObject (Object);
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if (SecondDesc)
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{
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AcpiUtDeleteObjectDesc (SecondDesc);
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}
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break;
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case ACPI_TYPE_LOCAL_BANK_FIELD:
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ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
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"***** Bank Field %p\n", Object));
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SecondDesc = AcpiNsGetSecondaryObject (Object);
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if (SecondDesc)
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{
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AcpiUtDeleteObjectDesc (SecondDesc);
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}
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break;
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default:
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break;
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}
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/* Free any allocated memory (pointer within the object) found above */
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if (ObjPointer)
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "Deleting Object Subptr %p\n",
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ObjPointer));
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ACPI_FREE (ObjPointer);
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}
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/* Now the object can be safely deleted */
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ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "Deleting Object %p [%s]\n",
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Object, AcpiUtGetObjectTypeName (Object)));
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AcpiUtDeleteObjectDesc (Object);
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return_VOID;
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiUtDeleteInternalObjectList
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*
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* PARAMETERS: ObjList - Pointer to the list to be deleted
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*
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* RETURN: None
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*
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* DESCRIPTION: This function deletes an internal object list, including both
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* simple objects and package objects
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*
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******************************************************************************/
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void
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AcpiUtDeleteInternalObjectList (
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ACPI_OPERAND_OBJECT **ObjList)
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{
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ACPI_OPERAND_OBJECT **InternalObj;
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ACPI_FUNCTION_TRACE (UtDeleteInternalObjectList);
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/* Walk the null-terminated internal list */
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for (InternalObj = ObjList; *InternalObj; InternalObj++)
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{
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AcpiUtRemoveReference (*InternalObj);
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}
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/* Free the combined parameter pointer list and object array */
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ACPI_FREE (ObjList);
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return_VOID;
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}
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|
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/*******************************************************************************
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*
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* FUNCTION: AcpiUtUpdateRefCount
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*
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* PARAMETERS: Object - Object whose ref count is to be updated
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* Action - What to do
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*
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* RETURN: New ref count
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*
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* DESCRIPTION: Modify the ref count and return it.
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*
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******************************************************************************/
|
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|
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static void
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AcpiUtUpdateRefCount (
|
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ACPI_OPERAND_OBJECT *Object,
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UINT32 Action)
|
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{
|
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UINT16 Count;
|
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UINT16 NewCount;
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|
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ACPI_FUNCTION_NAME (UtUpdateRefCount);
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|
|
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if (!Object)
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{
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return;
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}
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Count = Object->Common.ReferenceCount;
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NewCount = Count;
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|
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/*
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* Perform the reference count action (increment, decrement, force delete)
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*/
|
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switch (Action)
|
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{
|
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case REF_INCREMENT:
|
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|
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NewCount++;
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Object->Common.ReferenceCount = NewCount;
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|
|
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ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
|
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"Obj %p Refs=%X, [Incremented]\n",
|
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Object, NewCount));
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break;
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|
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case REF_DECREMENT:
|
|
|
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if (Count < 1)
|
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{
|
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ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
|
|
"Obj %p Refs=%X, can't decrement! (Set to 0)\n",
|
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Object, NewCount));
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|
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NewCount = 0;
|
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}
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else
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{
|
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NewCount--;
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|
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ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
|
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"Obj %p Refs=%X, [Decremented]\n",
|
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Object, NewCount));
|
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}
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|
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if (Object->Common.Type == ACPI_TYPE_METHOD)
|
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{
|
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ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
|
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"Method Obj %p Refs=%X, [Decremented]\n", Object, NewCount));
|
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}
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|
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Object->Common.ReferenceCount = NewCount;
|
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if (NewCount == 0)
|
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{
|
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AcpiUtDeleteInternalObj (Object);
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}
|
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break;
|
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|
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case REF_FORCE_DELETE:
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|
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ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
|
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"Obj %p Refs=%X, Force delete! (Set to 0)\n", Object, Count));
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|
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NewCount = 0;
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Object->Common.ReferenceCount = NewCount;
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AcpiUtDeleteInternalObj (Object);
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break;
|
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|
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default:
|
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|
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ACPI_ERROR ((AE_INFO, "Unknown action (0x%X)", Action));
|
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break;
|
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}
|
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|
|
/*
|
|
* Sanity check the reference count, for debug purposes only.
|
|
* (A deleted object will have a huge reference count)
|
|
*/
|
|
if (Count > ACPI_MAX_REFERENCE_COUNT)
|
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{
|
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ACPI_WARNING ((AE_INFO,
|
|
"Large Reference Count (0x%X) in object %p", Count, Object));
|
|
}
|
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}
|
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|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiUtUpdateObjectReference
|
|
*
|
|
* PARAMETERS: Object - Increment ref count for this object
|
|
* and all sub-objects
|
|
* Action - Either REF_INCREMENT or REF_DECREMENT or
|
|
* REF_FORCE_DELETE
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Increment the object reference count
|
|
*
|
|
* Object references are incremented when:
|
|
* 1) An object is attached to a Node (namespace object)
|
|
* 2) An object is copied (all subobjects must be incremented)
|
|
*
|
|
* Object references are decremented when:
|
|
* 1) An object is detached from an Node
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiUtUpdateObjectReference (
|
|
ACPI_OPERAND_OBJECT *Object,
|
|
UINT16 Action)
|
|
{
|
|
ACPI_STATUS Status = AE_OK;
|
|
ACPI_GENERIC_STATE *StateList = NULL;
|
|
ACPI_OPERAND_OBJECT *NextObject = NULL;
|
|
ACPI_GENERIC_STATE *State;
|
|
UINT32 i;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE_PTR (UtUpdateObjectReference, Object);
|
|
|
|
|
|
while (Object)
|
|
{
|
|
/* Make sure that this isn't a namespace handle */
|
|
|
|
if (ACPI_GET_DESCRIPTOR_TYPE (Object) == ACPI_DESC_TYPE_NAMED)
|
|
{
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
|
|
"Object %p is NS handle\n", Object));
|
|
return_ACPI_STATUS (AE_OK);
|
|
}
|
|
|
|
/*
|
|
* All sub-objects must have their reference count incremented also.
|
|
* Different object types have different subobjects.
|
|
*/
|
|
switch (Object->Common.Type)
|
|
{
|
|
case ACPI_TYPE_DEVICE:
|
|
case ACPI_TYPE_PROCESSOR:
|
|
case ACPI_TYPE_POWER:
|
|
case ACPI_TYPE_THERMAL:
|
|
|
|
/* Update the notify objects for these types (if present) */
|
|
|
|
AcpiUtUpdateRefCount (Object->CommonNotify.SystemNotify, Action);
|
|
AcpiUtUpdateRefCount (Object->CommonNotify.DeviceNotify, Action);
|
|
break;
|
|
|
|
case ACPI_TYPE_PACKAGE:
|
|
/*
|
|
* We must update all the sub-objects of the package,
|
|
* each of whom may have their own sub-objects.
|
|
*/
|
|
for (i = 0; i < Object->Package.Count; i++)
|
|
{
|
|
/*
|
|
* Push each element onto the stack for later processing.
|
|
* Note: There can be null elements within the package,
|
|
* these are simply ignored
|
|
*/
|
|
Status = AcpiUtCreateUpdateStateAndPush (
|
|
Object->Package.Elements[i], Action, &StateList);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
goto ErrorExit;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case ACPI_TYPE_BUFFER_FIELD:
|
|
|
|
NextObject = Object->BufferField.BufferObj;
|
|
break;
|
|
|
|
case ACPI_TYPE_LOCAL_REGION_FIELD:
|
|
|
|
NextObject = Object->Field.RegionObj;
|
|
break;
|
|
|
|
case ACPI_TYPE_LOCAL_BANK_FIELD:
|
|
|
|
NextObject = Object->BankField.BankObj;
|
|
Status = AcpiUtCreateUpdateStateAndPush (
|
|
Object->BankField.RegionObj, Action, &StateList);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
goto ErrorExit;
|
|
}
|
|
break;
|
|
|
|
case ACPI_TYPE_LOCAL_INDEX_FIELD:
|
|
|
|
NextObject = Object->IndexField.IndexObj;
|
|
Status = AcpiUtCreateUpdateStateAndPush (
|
|
Object->IndexField.DataObj, Action, &StateList);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
goto ErrorExit;
|
|
}
|
|
break;
|
|
|
|
case ACPI_TYPE_LOCAL_REFERENCE:
|
|
/*
|
|
* The target of an Index (a package, string, or buffer) or a named
|
|
* reference must track changes to the ref count of the index or
|
|
* target object.
|
|
*/
|
|
if ((Object->Reference.Class == ACPI_REFCLASS_INDEX) ||
|
|
(Object->Reference.Class== ACPI_REFCLASS_NAME))
|
|
{
|
|
NextObject = Object->Reference.Object;
|
|
}
|
|
break;
|
|
|
|
case ACPI_TYPE_REGION:
|
|
default:
|
|
break; /* No subobjects for all other types */
|
|
}
|
|
|
|
/*
|
|
* Now we can update the count in the main object. This can only
|
|
* happen after we update the sub-objects in case this causes the
|
|
* main object to be deleted.
|
|
*/
|
|
AcpiUtUpdateRefCount (Object, Action);
|
|
Object = NULL;
|
|
|
|
/* Move on to the next object to be updated */
|
|
|
|
if (NextObject)
|
|
{
|
|
Object = NextObject;
|
|
NextObject = NULL;
|
|
}
|
|
else if (StateList)
|
|
{
|
|
State = AcpiUtPopGenericState (&StateList);
|
|
Object = State->Update.Object;
|
|
AcpiUtDeleteGenericState (State);
|
|
}
|
|
}
|
|
|
|
return_ACPI_STATUS (AE_OK);
|
|
|
|
|
|
ErrorExit:
|
|
|
|
ACPI_EXCEPTION ((AE_INFO, Status,
|
|
"Could not update object reference count"));
|
|
|
|
/* Free any stacked Update State objects */
|
|
|
|
while (StateList)
|
|
{
|
|
State = AcpiUtPopGenericState (&StateList);
|
|
AcpiUtDeleteGenericState (State);
|
|
}
|
|
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiUtAddReference
|
|
*
|
|
* PARAMETERS: Object - Object whose reference count is to be
|
|
* incremented
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Add one reference to an ACPI object
|
|
*
|
|
******************************************************************************/
|
|
|
|
void
|
|
AcpiUtAddReference (
|
|
ACPI_OPERAND_OBJECT *Object)
|
|
{
|
|
|
|
ACPI_FUNCTION_TRACE_PTR (UtAddReference, Object);
|
|
|
|
|
|
/* Ensure that we have a valid object */
|
|
|
|
if (!AcpiUtValidInternalObject (Object))
|
|
{
|
|
return_VOID;
|
|
}
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
|
|
"Obj %p Current Refs=%X [To Be Incremented]\n",
|
|
Object, Object->Common.ReferenceCount));
|
|
|
|
/* Increment the reference count */
|
|
|
|
(void) AcpiUtUpdateObjectReference (Object, REF_INCREMENT);
|
|
return_VOID;
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiUtRemoveReference
|
|
*
|
|
* PARAMETERS: Object - Object whose ref count will be decremented
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Decrement the reference count of an ACPI internal object
|
|
*
|
|
******************************************************************************/
|
|
|
|
void
|
|
AcpiUtRemoveReference (
|
|
ACPI_OPERAND_OBJECT *Object)
|
|
{
|
|
|
|
ACPI_FUNCTION_TRACE_PTR (UtRemoveReference, Object);
|
|
|
|
|
|
/*
|
|
* Allow a NULL pointer to be passed in, just ignore it. This saves
|
|
* each caller from having to check. Also, ignore NS nodes.
|
|
*
|
|
*/
|
|
if (!Object ||
|
|
(ACPI_GET_DESCRIPTOR_TYPE (Object) == ACPI_DESC_TYPE_NAMED))
|
|
|
|
{
|
|
return_VOID;
|
|
}
|
|
|
|
/* Ensure that we have a valid object */
|
|
|
|
if (!AcpiUtValidInternalObject (Object))
|
|
{
|
|
return_VOID;
|
|
}
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
|
|
"Obj %p Current Refs=%X [To Be Decremented]\n",
|
|
Object, Object->Common.ReferenceCount));
|
|
|
|
/*
|
|
* Decrement the reference count, and only actually delete the object
|
|
* if the reference count becomes 0. (Must also decrement the ref count
|
|
* of all subobjects!)
|
|
*/
|
|
(void) AcpiUtUpdateObjectReference (Object, REF_DECREMENT);
|
|
return_VOID;
|
|
}
|
|
|
|
|