763 lines
25 KiB
C
763 lines
25 KiB
C
/******************************************************************************
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*
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* Module Name: dsmethod - Parser/Interpreter interface - control method parsing
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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 - 2009, 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 __DSMETHOD_C__
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#include <contrib/dev/acpica/include/acpi.h>
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#include <contrib/dev/acpica/include/accommon.h>
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#include <contrib/dev/acpica/include/amlcode.h>
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#include <contrib/dev/acpica/include/acdispat.h>
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#include <contrib/dev/acpica/include/acinterp.h>
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#include <contrib/dev/acpica/include/acnamesp.h>
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#include <contrib/dev/acpica/include/acdisasm.h>
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#define _COMPONENT ACPI_DISPATCHER
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ACPI_MODULE_NAME ("dsmethod")
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/* Local prototypes */
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static ACPI_STATUS
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AcpiDsCreateMethodMutex (
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ACPI_OPERAND_OBJECT *MethodDesc);
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/*******************************************************************************
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*
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* FUNCTION: AcpiDsMethodError
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*
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* PARAMETERS: Status - Execution status
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* WalkState - Current state
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*
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* RETURN: Status
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*
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* DESCRIPTION: Called on method error. Invoke the global exception handler if
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* present, dump the method data if the disassembler is configured
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*
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* Note: Allows the exception handler to change the status code
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiDsMethodError (
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ACPI_STATUS Status,
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ACPI_WALK_STATE *WalkState)
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{
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ACPI_FUNCTION_ENTRY ();
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/* Ignore AE_OK and control exception codes */
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if (ACPI_SUCCESS (Status) ||
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(Status & AE_CODE_CONTROL))
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{
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return (Status);
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}
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/* Invoke the global exception handler */
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if (AcpiGbl_ExceptionHandler)
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{
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/* Exit the interpreter, allow handler to execute methods */
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AcpiExExitInterpreter ();
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/*
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* Handler can map the exception code to anything it wants, including
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* AE_OK, in which case the executing method will not be aborted.
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*/
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Status = AcpiGbl_ExceptionHandler (Status,
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WalkState->MethodNode ?
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WalkState->MethodNode->Name.Integer : 0,
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WalkState->Opcode, WalkState->AmlOffset, NULL);
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AcpiExEnterInterpreter ();
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}
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AcpiDsClearImplicitReturn (WalkState);
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#ifdef ACPI_DISASSEMBLER
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if (ACPI_FAILURE (Status))
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{
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/* Display method locals/args if disassembler is present */
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AcpiDmDumpMethodInfo (Status, WalkState, WalkState->Op);
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}
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#endif
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return (Status);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiDsCreateMethodMutex
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*
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* PARAMETERS: ObjDesc - The method object
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*
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* RETURN: Status
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*
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* DESCRIPTION: Create a mutex object for a serialized control method
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*
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******************************************************************************/
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static ACPI_STATUS
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AcpiDsCreateMethodMutex (
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ACPI_OPERAND_OBJECT *MethodDesc)
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{
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ACPI_OPERAND_OBJECT *MutexDesc;
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE (DsCreateMethodMutex);
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/* Create the new mutex object */
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MutexDesc = AcpiUtCreateInternalObject (ACPI_TYPE_MUTEX);
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if (!MutexDesc)
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{
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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/* Create the actual OS Mutex */
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Status = AcpiOsCreateMutex (&MutexDesc->Mutex.OsMutex);
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if (ACPI_FAILURE (Status))
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{
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return_ACPI_STATUS (Status);
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}
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MutexDesc->Mutex.SyncLevel = MethodDesc->Method.SyncLevel;
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MethodDesc->Method.Mutex = MutexDesc;
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return_ACPI_STATUS (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiDsBeginMethodExecution
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*
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* PARAMETERS: MethodNode - Node of the method
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* ObjDesc - The method object
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* WalkState - current state, NULL if not yet executing
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* a method.
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*
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* RETURN: Status
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*
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* DESCRIPTION: Prepare a method for execution. Parses the method if necessary,
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* increments the thread count, and waits at the method semaphore
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* for clearance to execute.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiDsBeginMethodExecution (
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ACPI_NAMESPACE_NODE *MethodNode,
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ACPI_OPERAND_OBJECT *ObjDesc,
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ACPI_WALK_STATE *WalkState)
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{
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ACPI_STATUS Status = AE_OK;
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ACPI_FUNCTION_TRACE_PTR (DsBeginMethodExecution, MethodNode);
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if (!MethodNode)
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{
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return_ACPI_STATUS (AE_NULL_ENTRY);
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}
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/* Prevent wraparound of thread count */
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if (ObjDesc->Method.ThreadCount == ACPI_UINT8_MAX)
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{
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ACPI_ERROR ((AE_INFO,
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"Method reached maximum reentrancy limit (255)"));
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return_ACPI_STATUS (AE_AML_METHOD_LIMIT);
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}
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/*
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* If this method is serialized, we need to acquire the method mutex.
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*/
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if (ObjDesc->Method.MethodFlags & AML_METHOD_SERIALIZED)
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{
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/*
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* Create a mutex for the method if it is defined to be Serialized
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* and a mutex has not already been created. We defer the mutex creation
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* until a method is actually executed, to minimize the object count
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*/
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if (!ObjDesc->Method.Mutex)
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{
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Status = AcpiDsCreateMethodMutex (ObjDesc);
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if (ACPI_FAILURE (Status))
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{
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return_ACPI_STATUS (Status);
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}
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}
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/*
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* The CurrentSyncLevel (per-thread) must be less than or equal to
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* the sync level of the method. This mechanism provides some
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* deadlock prevention
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*
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* Top-level method invocation has no walk state at this point
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*/
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if (WalkState &&
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(WalkState->Thread->CurrentSyncLevel > ObjDesc->Method.Mutex->Mutex.SyncLevel))
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{
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ACPI_ERROR ((AE_INFO,
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"Cannot acquire Mutex for method [%4.4s], current SyncLevel is too large (%d)",
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AcpiUtGetNodeName (MethodNode),
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WalkState->Thread->CurrentSyncLevel));
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return_ACPI_STATUS (AE_AML_MUTEX_ORDER);
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}
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/*
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* Obtain the method mutex if necessary. Do not acquire mutex for a
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* recursive call.
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*/
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if (!WalkState ||
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!ObjDesc->Method.Mutex->Mutex.ThreadId ||
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(WalkState->Thread->ThreadId != ObjDesc->Method.Mutex->Mutex.ThreadId))
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{
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/*
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* Acquire the method mutex. This releases the interpreter if we
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* block (and reacquires it before it returns)
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*/
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Status = AcpiExSystemWaitMutex (ObjDesc->Method.Mutex->Mutex.OsMutex,
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ACPI_WAIT_FOREVER);
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if (ACPI_FAILURE (Status))
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{
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return_ACPI_STATUS (Status);
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}
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/* Update the mutex and walk info and save the original SyncLevel */
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if (WalkState)
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{
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ObjDesc->Method.Mutex->Mutex.OriginalSyncLevel =
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WalkState->Thread->CurrentSyncLevel;
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ObjDesc->Method.Mutex->Mutex.ThreadId = WalkState->Thread->ThreadId;
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WalkState->Thread->CurrentSyncLevel = ObjDesc->Method.SyncLevel;
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}
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else
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{
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ObjDesc->Method.Mutex->Mutex.OriginalSyncLevel =
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ObjDesc->Method.Mutex->Mutex.SyncLevel;
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}
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}
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/* Always increase acquisition depth */
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ObjDesc->Method.Mutex->Mutex.AcquisitionDepth++;
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}
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/*
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* Allocate an Owner ID for this method, only if this is the first thread
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* to begin concurrent execution. We only need one OwnerId, even if the
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* method is invoked recursively.
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*/
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if (!ObjDesc->Method.OwnerId)
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{
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Status = AcpiUtAllocateOwnerId (&ObjDesc->Method.OwnerId);
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if (ACPI_FAILURE (Status))
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{
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goto Cleanup;
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}
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}
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/*
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* Increment the method parse tree thread count since it has been
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* reentered one more time (even if it is the same thread)
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*/
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ObjDesc->Method.ThreadCount++;
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AcpiMethodCount++;
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return_ACPI_STATUS (Status);
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Cleanup:
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/* On error, must release the method mutex (if present) */
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if (ObjDesc->Method.Mutex)
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{
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AcpiOsReleaseMutex (ObjDesc->Method.Mutex->Mutex.OsMutex);
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}
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return_ACPI_STATUS (Status);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiDsCallControlMethod
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*
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* PARAMETERS: Thread - Info for this thread
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* ThisWalkState - Current walk state
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* Op - Current Op to be walked
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*
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* RETURN: Status
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*
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* DESCRIPTION: Transfer execution to a called control method
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiDsCallControlMethod (
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ACPI_THREAD_STATE *Thread,
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ACPI_WALK_STATE *ThisWalkState,
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ACPI_PARSE_OBJECT *Op)
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{
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ACPI_STATUS Status;
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ACPI_NAMESPACE_NODE *MethodNode;
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ACPI_WALK_STATE *NextWalkState = NULL;
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ACPI_OPERAND_OBJECT *ObjDesc;
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ACPI_EVALUATE_INFO *Info;
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UINT32 i;
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ACPI_FUNCTION_TRACE_PTR (DsCallControlMethod, ThisWalkState);
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ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Calling method %p, currentstate=%p\n",
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ThisWalkState->PrevOp, ThisWalkState));
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/*
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* Get the namespace entry for the control method we are about to call
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*/
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MethodNode = ThisWalkState->MethodCallNode;
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if (!MethodNode)
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{
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return_ACPI_STATUS (AE_NULL_ENTRY);
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}
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ObjDesc = AcpiNsGetAttachedObject (MethodNode);
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if (!ObjDesc)
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{
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return_ACPI_STATUS (AE_NULL_OBJECT);
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}
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/* Init for new method, possibly wait on method mutex */
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Status = AcpiDsBeginMethodExecution (MethodNode, ObjDesc,
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ThisWalkState);
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if (ACPI_FAILURE (Status))
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{
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return_ACPI_STATUS (Status);
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}
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/* Begin method parse/execution. Create a new walk state */
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NextWalkState = AcpiDsCreateWalkState (ObjDesc->Method.OwnerId,
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NULL, ObjDesc, Thread);
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if (!NextWalkState)
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{
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Status = AE_NO_MEMORY;
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goto Cleanup;
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}
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/*
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* The resolved arguments were put on the previous walk state's operand
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* stack. Operands on the previous walk state stack always
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* start at index 0. Also, null terminate the list of arguments
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*/
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ThisWalkState->Operands [ThisWalkState->NumOperands] = NULL;
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/*
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* Allocate and initialize the evaluation information block
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* TBD: this is somewhat inefficient, should change interface to
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* DsInitAmlWalk. For now, keeps this struct off the CPU stack
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*/
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Info = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO));
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if (!Info)
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{
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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Info->Parameters = &ThisWalkState->Operands[0];
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Status = AcpiDsInitAmlWalk (NextWalkState, NULL, MethodNode,
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ObjDesc->Method.AmlStart, ObjDesc->Method.AmlLength,
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Info, ACPI_IMODE_EXECUTE);
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ACPI_FREE (Info);
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if (ACPI_FAILURE (Status))
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{
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goto Cleanup;
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}
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/*
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* Delete the operands on the previous walkstate operand stack
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* (they were copied to new objects)
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*/
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for (i = 0; i < ObjDesc->Method.ParamCount; i++)
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{
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AcpiUtRemoveReference (ThisWalkState->Operands [i]);
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ThisWalkState->Operands [i] = NULL;
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}
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/* Clear the operand stack */
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ThisWalkState->NumOperands = 0;
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ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
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"**** Begin nested execution of [%4.4s] **** WalkState=%p\n",
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MethodNode->Name.Ascii, NextWalkState));
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/* Invoke an internal method if necessary */
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if (ObjDesc->Method.MethodFlags & AML_METHOD_INTERNAL_ONLY)
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{
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Status = ObjDesc->Method.Implementation (NextWalkState);
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if (Status == AE_OK)
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{
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Status = AE_CTRL_TERMINATE;
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}
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}
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return_ACPI_STATUS (Status);
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Cleanup:
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/* On error, we must terminate the method properly */
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AcpiDsTerminateControlMethod (ObjDesc, NextWalkState);
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if (NextWalkState)
|
|
{
|
|
AcpiDsDeleteWalkState (NextWalkState);
|
|
}
|
|
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiDsRestartControlMethod
|
|
*
|
|
* PARAMETERS: WalkState - State for preempted method (caller)
|
|
* ReturnDesc - Return value from the called method
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Restart a method that was preempted by another (nested) method
|
|
* invocation. Handle the return value (if any) from the callee.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiDsRestartControlMethod (
|
|
ACPI_WALK_STATE *WalkState,
|
|
ACPI_OPERAND_OBJECT *ReturnDesc)
|
|
{
|
|
ACPI_STATUS Status;
|
|
int SameAsImplicitReturn;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE_PTR (DsRestartControlMethod, WalkState);
|
|
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
|
|
"****Restart [%4.4s] Op %p ReturnValueFromCallee %p\n",
|
|
AcpiUtGetNodeName (WalkState->MethodNode),
|
|
WalkState->MethodCallOp, ReturnDesc));
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
|
|
" ReturnFromThisMethodUsed?=%X ResStack %p Walk %p\n",
|
|
WalkState->ReturnUsed,
|
|
WalkState->Results, WalkState));
|
|
|
|
/* Did the called method return a value? */
|
|
|
|
if (ReturnDesc)
|
|
{
|
|
/* Is the implicit return object the same as the return desc? */
|
|
|
|
SameAsImplicitReturn = (WalkState->ImplicitReturnObj == ReturnDesc);
|
|
|
|
/* Are we actually going to use the return value? */
|
|
|
|
if (WalkState->ReturnUsed)
|
|
{
|
|
/* Save the return value from the previous method */
|
|
|
|
Status = AcpiDsResultPush (ReturnDesc, WalkState);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
AcpiUtRemoveReference (ReturnDesc);
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
/*
|
|
* Save as THIS method's return value in case it is returned
|
|
* immediately to yet another method
|
|
*/
|
|
WalkState->ReturnDesc = ReturnDesc;
|
|
}
|
|
|
|
/*
|
|
* The following code is the optional support for the so-called
|
|
* "implicit return". Some AML code assumes that the last value of the
|
|
* method is "implicitly" returned to the caller, in the absence of an
|
|
* explicit return value.
|
|
*
|
|
* Just save the last result of the method as the return value.
|
|
*
|
|
* NOTE: this is optional because the ASL language does not actually
|
|
* support this behavior.
|
|
*/
|
|
else if (!AcpiDsDoImplicitReturn (ReturnDesc, WalkState, FALSE) ||
|
|
SameAsImplicitReturn)
|
|
{
|
|
/*
|
|
* Delete the return value if it will not be used by the
|
|
* calling method or remove one reference if the explicit return
|
|
* is the same as the implicit return value.
|
|
*/
|
|
AcpiUtRemoveReference (ReturnDesc);
|
|
}
|
|
}
|
|
|
|
return_ACPI_STATUS (AE_OK);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiDsTerminateControlMethod
|
|
*
|
|
* PARAMETERS: MethodDesc - Method object
|
|
* WalkState - State associated with the method
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Terminate a control method. Delete everything that the method
|
|
* created, delete all locals and arguments, and delete the parse
|
|
* tree if requested.
|
|
*
|
|
* MUTEX: Interpreter is locked
|
|
*
|
|
******************************************************************************/
|
|
|
|
void
|
|
AcpiDsTerminateControlMethod (
|
|
ACPI_OPERAND_OBJECT *MethodDesc,
|
|
ACPI_WALK_STATE *WalkState)
|
|
{
|
|
|
|
ACPI_FUNCTION_TRACE_PTR (DsTerminateControlMethod, WalkState);
|
|
|
|
|
|
/* MethodDesc is required, WalkState is optional */
|
|
|
|
if (!MethodDesc)
|
|
{
|
|
return_VOID;
|
|
}
|
|
|
|
if (WalkState)
|
|
{
|
|
/* Delete all arguments and locals */
|
|
|
|
AcpiDsMethodDataDeleteAll (WalkState);
|
|
|
|
/*
|
|
* If method is serialized, release the mutex and restore the
|
|
* current sync level for this thread
|
|
*/
|
|
if (MethodDesc->Method.Mutex)
|
|
{
|
|
/* Acquisition Depth handles recursive calls */
|
|
|
|
MethodDesc->Method.Mutex->Mutex.AcquisitionDepth--;
|
|
if (!MethodDesc->Method.Mutex->Mutex.AcquisitionDepth)
|
|
{
|
|
WalkState->Thread->CurrentSyncLevel =
|
|
MethodDesc->Method.Mutex->Mutex.OriginalSyncLevel;
|
|
|
|
AcpiOsReleaseMutex (MethodDesc->Method.Mutex->Mutex.OsMutex);
|
|
MethodDesc->Method.Mutex->Mutex.ThreadId = 0;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Delete any namespace objects created anywhere within the
|
|
* namespace by the execution of this method. Unless this method
|
|
* is a module-level executable code method, in which case we
|
|
* want make the objects permanent.
|
|
*/
|
|
if (!(MethodDesc->Method.Flags & AOPOBJ_MODULE_LEVEL))
|
|
{
|
|
AcpiNsDeleteNamespaceByOwner (MethodDesc->Method.OwnerId);
|
|
}
|
|
}
|
|
|
|
/* Decrement the thread count on the method */
|
|
|
|
if (MethodDesc->Method.ThreadCount)
|
|
{
|
|
MethodDesc->Method.ThreadCount--;
|
|
}
|
|
else
|
|
{
|
|
ACPI_ERROR ((AE_INFO,
|
|
"Invalid zero thread count in method"));
|
|
}
|
|
|
|
/* Are there any other threads currently executing this method? */
|
|
|
|
if (MethodDesc->Method.ThreadCount)
|
|
{
|
|
/*
|
|
* Additional threads. Do not release the OwnerId in this case,
|
|
* we immediately reuse it for the next thread executing this method
|
|
*/
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
|
|
"*** Completed execution of one thread, %d threads remaining\n",
|
|
MethodDesc->Method.ThreadCount));
|
|
}
|
|
else
|
|
{
|
|
/* This is the only executing thread for this method */
|
|
|
|
/*
|
|
* Support to dynamically change a method from NotSerialized to
|
|
* Serialized if it appears that the method is incorrectly written and
|
|
* does not support multiple thread execution. The best example of this
|
|
* is if such a method creates namespace objects and blocks. A second
|
|
* thread will fail with an AE_ALREADY_EXISTS exception
|
|
*
|
|
* This code is here because we must wait until the last thread exits
|
|
* before creating the synchronization semaphore.
|
|
*/
|
|
if ((MethodDesc->Method.MethodFlags & AML_METHOD_SERIALIZED) &&
|
|
(!MethodDesc->Method.Mutex))
|
|
{
|
|
(void) AcpiDsCreateMethodMutex (MethodDesc);
|
|
}
|
|
|
|
/* No more threads, we can free the OwnerId */
|
|
|
|
if (!(MethodDesc->Method.Flags & AOPOBJ_MODULE_LEVEL))
|
|
{
|
|
AcpiUtReleaseOwnerId (&MethodDesc->Method.OwnerId);
|
|
}
|
|
}
|
|
|
|
return_VOID;
|
|
}
|
|
|
|
|