diff options
Diffstat (limited to 'sys/contrib/dev/acpica/components/utilities/utdelete.c')
| -rw-r--r-- | sys/contrib/dev/acpica/components/utilities/utdelete.c | 925 |
1 files changed, 925 insertions, 0 deletions
diff --git a/sys/contrib/dev/acpica/components/utilities/utdelete.c b/sys/contrib/dev/acpica/components/utilities/utdelete.c new file mode 100644 index 000000000000..032bf9fae7bf --- /dev/null +++ b/sys/contrib/dev/acpica/components/utilities/utdelete.c @@ -0,0 +1,925 @@ +/******************************************************************************* + * + * Module Name: utdelete - object deletion and reference count utilities + * + ******************************************************************************/ + +/****************************************************************************** + * + * 1. Copyright Notice + * + * Some or all of this work - Copyright (c) 1999 - 2020, Intel Corp. + * All rights reserved. + * + * 2. License + * + * 2.1. This is your license from Intel Corp. under its intellectual property + * rights. You may have additional license terms from the party that provided + * you this software, covering your right to use that party's intellectual + * property rights. + * + * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a + * copy of the source code appearing in this file ("Covered Code") an + * irrevocable, perpetual, worldwide license under Intel's copyrights in the + * base code distributed originally by Intel ("Original Intel Code") to copy, + * make derivatives, distribute, use and display any portion of the Covered + * Code in any form, with the right to sublicense such rights; and + * + * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent + * license (with the right to sublicense), under only those claims of Intel + * patents that are infringed by the Original Intel Code, to make, use, sell, + * offer to sell, and import the Covered Code and derivative works thereof + * solely to the minimum extent necessary to exercise the above copyright + * license, and in no event shall the patent license extend to any additions + * to or modifications of the Original Intel Code. No other license or right + * is granted directly or by implication, estoppel or otherwise; + * + * The above copyright and patent license is granted only if the following + * conditions are met: + * + * 3. Conditions + * + * 3.1. Redistribution of Source with Rights to Further Distribute Source. + * Redistribution of source code of any substantial portion of the Covered + * Code or modification with rights to further distribute source must include + * the above Copyright Notice, the above License, this list of Conditions, + * and the following Disclaimer and Export Compliance provision. In addition, + * Licensee must cause all Covered Code to which Licensee contributes to + * contain a file documenting the changes Licensee made to create that Covered + * Code and the date of any change. Licensee must include in that file the + * documentation of any changes made by any predecessor Licensee. Licensee + * must include a prominent statement that the modification is derived, + * directly or indirectly, from Original Intel Code. + * + * 3.2. Redistribution of Source with no Rights to Further Distribute Source. + * Redistribution of source code of any substantial portion of the Covered + * Code or modification without rights to further distribute source must + * include the following Disclaimer and Export Compliance provision in the + * documentation and/or other materials provided with distribution. In + * addition, Licensee may not authorize further sublicense of source of any + * portion of the Covered Code, and must include terms to the effect that the + * license from Licensee to its licensee is limited to the intellectual + * property embodied in the software Licensee provides to its licensee, and + * not to intellectual property embodied in modifications its licensee may + * make. + * + * 3.3. Redistribution of Executable. Redistribution in executable form of any + * substantial portion of the Covered Code or modification must reproduce the + * above Copyright Notice, and the following Disclaimer and Export Compliance + * provision in the documentation and/or other materials provided with the + * distribution. + * + * 3.4. Intel retains all right, title, and interest in and to the Original + * Intel Code. + * + * 3.5. Neither the name Intel nor any other trademark owned or controlled by + * Intel shall be used in advertising or otherwise to promote the sale, use or + * other dealings in products derived from or relating to the Covered Code + * without prior written authorization from Intel. + * + * 4. Disclaimer and Export Compliance + * + * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED + * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE + * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, + * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY + * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY + * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A + * PARTICULAR PURPOSE. + * + * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES + * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR + * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, + * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY + * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL + * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS + * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY + * LIMITED REMEDY. + * + * 4.3. Licensee shall not export, either directly or indirectly, any of this + * software or system incorporating such software without first obtaining any + * required license or other approval from the U. S. Department of Commerce or + * any other agency or department of the United States Government. In the + * event Licensee exports any such software from the United States or + * re-exports any such software from a foreign destination, Licensee shall + * ensure that the distribution and export/re-export of the software is in + * compliance with all laws, regulations, orders, or other restrictions of the + * U.S. Export Administration Regulations. Licensee agrees that neither it nor + * any of its subsidiaries will export/re-export any technical data, process, + * software, or service, directly or indirectly, to any country for which the + * United States government or any agency thereof requires an export license, + * other governmental approval, or letter of assurance, without first obtaining + * such license, approval or letter. + * + ***************************************************************************** + * + * Alternatively, you may choose to be licensed under the terms of the + * following license: + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. Redistributions in binary form must reproduce at minimum a disclaimer + * substantially similar to the "NO WARRANTY" disclaimer below + * ("Disclaimer") and any redistribution must be conditioned upon + * including a substantially similar Disclaimer requirement for further + * binary redistribution. + * 3. Neither the names of the above-listed copyright holders nor the names + * of any contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * Alternatively, you may choose to be licensed under the terms of the + * GNU General Public License ("GPL") version 2 as published by the Free + * Software Foundation. + * + *****************************************************************************/ + +#include <contrib/dev/acpica/include/acpi.h> +#include <contrib/dev/acpica/include/accommon.h> +#include <contrib/dev/acpica/include/acinterp.h> +#include <contrib/dev/acpica/include/acnamesp.h> +#include <contrib/dev/acpica/include/acevents.h> + + +#define _COMPONENT ACPI_UTILITIES + ACPI_MODULE_NAME ("utdelete") + +/* Local prototypes */ + +static void +AcpiUtDeleteInternalObj ( + ACPI_OPERAND_OBJECT *Object); + +static void +AcpiUtUpdateRefCount ( + ACPI_OPERAND_OBJECT *Object, + UINT32 Action); + + +/******************************************************************************* + * + * FUNCTION: AcpiUtDeleteInternalObj + * + * PARAMETERS: Object - Object to be deleted + * + * RETURN: None + * + * DESCRIPTION: Low level object deletion, after reference counts have been + * updated (All reference counts, including sub-objects!) + * + ******************************************************************************/ + +static void +AcpiUtDeleteInternalObj ( + ACPI_OPERAND_OBJECT *Object) +{ + void *ObjPointer = NULL; + ACPI_OPERAND_OBJECT *HandlerDesc; + ACPI_OPERAND_OBJECT *SecondDesc; + ACPI_OPERAND_OBJECT *NextDesc; + ACPI_OPERAND_OBJECT *StartDesc; + ACPI_OPERAND_OBJECT **LastObjPtr; + + + ACPI_FUNCTION_TRACE_PTR (UtDeleteInternalObj, Object); + + + if (!Object) + { + return_VOID; + } + + /* + * Must delete or free any pointers within the object that are not + * actual ACPI objects (for example, a raw buffer pointer). + */ + switch (Object->Common.Type) + { + case ACPI_TYPE_STRING: + + ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "**** String %p, ptr %p\n", + Object, Object->String.Pointer)); + + /* Free the actual string buffer */ + + if (!(Object->Common.Flags & AOPOBJ_STATIC_POINTER)) + { + /* But only if it is NOT a pointer into an ACPI table */ + + ObjPointer = Object->String.Pointer; + } + break; + + case ACPI_TYPE_BUFFER: + + ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "**** Buffer %p, ptr %p\n", + Object, Object->Buffer.Pointer)); + + /* Free the actual buffer */ + + if (!(Object->Common.Flags & AOPOBJ_STATIC_POINTER)) + { + /* But only if it is NOT a pointer into an ACPI table */ + + ObjPointer = Object->Buffer.Pointer; + } + break; + + case ACPI_TYPE_PACKAGE: + + ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, " **** Package of count %X\n", + Object->Package.Count)); + + /* + * Elements of the package are not handled here, they are deleted + * separately + */ + + /* Free the (variable length) element pointer array */ + + ObjPointer = Object->Package.Elements; + break; + + /* + * These objects have a possible list of notify handlers. + * Device object also may have a GPE block. + */ + case ACPI_TYPE_DEVICE: + + if (Object->Device.GpeBlock) + { + (void) AcpiEvDeleteGpeBlock (Object->Device.GpeBlock); + } + + /*lint -fallthrough */ + + case ACPI_TYPE_PROCESSOR: + case ACPI_TYPE_THERMAL: + + /* Walk the address handler list for this object */ + + HandlerDesc = Object->CommonNotify.Handler; + while (HandlerDesc) + { + NextDesc = HandlerDesc->AddressSpace.Next; + AcpiUtRemoveReference (HandlerDesc); + HandlerDesc = NextDesc; + } + break; + + case ACPI_TYPE_MUTEX: + + ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, + "***** Mutex %p, OS Mutex %p\n", + Object, Object->Mutex.OsMutex)); + + if (Object == AcpiGbl_GlobalLockMutex) + { + /* Global Lock has extra semaphore */ + + (void) AcpiOsDeleteSemaphore (AcpiGbl_GlobalLockSemaphore); + AcpiGbl_GlobalLockSemaphore = NULL; + + AcpiOsDeleteMutex (Object->Mutex.OsMutex); + AcpiGbl_GlobalLockMutex = NULL; + } + else + { + AcpiExUnlinkMutex (Object); + AcpiOsDeleteMutex (Object->Mutex.OsMutex); + } + break; + + case ACPI_TYPE_EVENT: + + ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, + "***** Event %p, OS Semaphore %p\n", + Object, Object->Event.OsSemaphore)); + + (void) AcpiOsDeleteSemaphore (Object->Event.OsSemaphore); + Object->Event.OsSemaphore = NULL; + break; + + case ACPI_TYPE_METHOD: + + ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, + "***** Method %p\n", Object)); + + /* Delete the method mutex if it exists */ + + if (Object->Method.Mutex) + { + AcpiOsDeleteMutex (Object->Method.Mutex->Mutex.OsMutex); + AcpiUtDeleteObjectDesc (Object->Method.Mutex); + Object->Method.Mutex = NULL; + } + + if (Object->Method.Node) + { + Object->Method.Node = NULL; + } + break; + + case ACPI_TYPE_REGION: + + ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, + "***** Region %p\n", Object)); + + /* + * Update AddressRange list. However, only permanent regions + * are installed in this list. (Not created within a method) + */ + if (!(Object->Region.Node->Flags & ANOBJ_TEMPORARY)) + { + AcpiUtRemoveAddressRange (Object->Region.SpaceId, + Object->Region.Node); + } + + SecondDesc = AcpiNsGetSecondaryObject (Object); + if (SecondDesc) + { + /* + * Free the RegionContext if and only if the handler is one of the + * default handlers -- and therefore, we created the context object + * locally, it was not created by an external caller. + */ + HandlerDesc = Object->Region.Handler; + if (HandlerDesc) + { + NextDesc = HandlerDesc->AddressSpace.RegionList; + StartDesc = NextDesc; + LastObjPtr = &HandlerDesc->AddressSpace.RegionList; + + /* Remove the region object from the handler list */ + + while (NextDesc) + { + if (NextDesc == Object) + { + *LastObjPtr = NextDesc->Region.Next; + break; + } + + /* Walk the linked list of handlers */ + + LastObjPtr = &NextDesc->Region.Next; + NextDesc = NextDesc->Region.Next; + + /* Prevent infinite loop if list is corrupted */ + + if (NextDesc == StartDesc) + { + ACPI_ERROR ((AE_INFO, + "Circular region list in address handler object %p", + HandlerDesc)); + return_VOID; + } + } + + if (HandlerDesc->AddressSpace.HandlerFlags & + ACPI_ADDR_HANDLER_DEFAULT_INSTALLED) + { + /* Deactivate region and free region context */ + + if (HandlerDesc->AddressSpace.Setup) + { + (void) HandlerDesc->AddressSpace.Setup (Object, + ACPI_REGION_DEACTIVATE, + HandlerDesc->AddressSpace.Context, + &SecondDesc->Extra.RegionContext); + } + } + + AcpiUtRemoveReference (HandlerDesc); + } + + /* Now we can free the Extra object */ + + AcpiUtDeleteObjectDesc (SecondDesc); + } + if (Object->Field.InternalPccBuffer) + { + ACPI_FREE(Object->Field.InternalPccBuffer); + } + + break; + + case ACPI_TYPE_BUFFER_FIELD: + + ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, + "***** Buffer Field %p\n", Object)); + + SecondDesc = AcpiNsGetSecondaryObject (Object); + if (SecondDesc) + { + AcpiUtDeleteObjectDesc (SecondDesc); + } + break; + + case ACPI_TYPE_LOCAL_BANK_FIELD: + + ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, + "***** Bank Field %p\n", Object)); + + SecondDesc = AcpiNsGetSecondaryObject (Object); + if (SecondDesc) + { + AcpiUtDeleteObjectDesc (SecondDesc); + } + break; + + default: + + break; + } + + /* Free any allocated memory (pointer within the object) found above */ + + if (ObjPointer) + { + ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "Deleting Object Subptr %p\n", + ObjPointer)); + ACPI_FREE (ObjPointer); + } + + /* Now the object can be safely deleted */ + + ACPI_DEBUG_PRINT_RAW ((ACPI_DB_ALLOCATIONS, "%s: Deleting Object %p [%s]\n", + ACPI_GET_FUNCTION_NAME, Object, AcpiUtGetObjectTypeName (Object))); + + AcpiUtDeleteObjectDesc (Object); + return_VOID; +} + + +/******************************************************************************* + * + * FUNCTION: AcpiUtDeleteInternalObjectList + * + * PARAMETERS: ObjList - Pointer to the list to be deleted + * + * RETURN: None + * + * DESCRIPTION: This function deletes an internal object list, including both + * simple objects and package objects + * + ******************************************************************************/ + +void +AcpiUtDeleteInternalObjectList ( + ACPI_OPERAND_OBJECT **ObjList) +{ + ACPI_OPERAND_OBJECT **InternalObj; + + + ACPI_FUNCTION_ENTRY (); + + + /* Walk the null-terminated internal list */ + + for (InternalObj = ObjList; *InternalObj; InternalObj++) + { + AcpiUtRemoveReference (*InternalObj); + } + + /* Free the combined parameter pointer list and object array */ + + ACPI_FREE (ObjList); + return; +} + + +/******************************************************************************* + * + * FUNCTION: AcpiUtUpdateRefCount + * + * PARAMETERS: Object - Object whose ref count is to be updated + * Action - What to do (REF_INCREMENT or REF_DECREMENT) + * + * RETURN: None. Sets new reference count within the object + * + * DESCRIPTION: Modify the reference count for an internal acpi object + * + ******************************************************************************/ + +static void +AcpiUtUpdateRefCount ( + ACPI_OPERAND_OBJECT *Object, + UINT32 Action) +{ + UINT16 OriginalCount; + UINT16 NewCount = 0; + ACPI_CPU_FLAGS LockFlags; + char *Message; + + + ACPI_FUNCTION_NAME (UtUpdateRefCount); + + + if (!Object) + { + return; + } + + /* + * Always get the reference count lock. Note: Interpreter and/or + * Namespace is not always locked when this function is called. + */ + LockFlags = AcpiOsAcquireLock (AcpiGbl_ReferenceCountLock); + OriginalCount = Object->Common.ReferenceCount; + + /* Perform the reference count action (increment, decrement) */ + + switch (Action) + { + case REF_INCREMENT: + + NewCount = OriginalCount + 1; + Object->Common.ReferenceCount = NewCount; + AcpiOsReleaseLock (AcpiGbl_ReferenceCountLock, LockFlags); + + /* The current reference count should never be zero here */ + + if (!OriginalCount) + { + ACPI_WARNING ((AE_INFO, + "Obj %p, Reference Count was zero before increment\n", + Object)); + } + + ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, + "Obj %p Type %.2X [%s] Refs %.2X [Incremented]\n", + Object, Object->Common.Type, + AcpiUtGetObjectTypeName (Object), NewCount)); + Message = "Incremement"; + break; + + case REF_DECREMENT: + + /* The current reference count must be non-zero */ + + if (OriginalCount) + { + NewCount = OriginalCount - 1; + Object->Common.ReferenceCount = NewCount; + } + + AcpiOsReleaseLock (AcpiGbl_ReferenceCountLock, LockFlags); + + if (!OriginalCount) + { + ACPI_WARNING ((AE_INFO, + "Obj %p, Reference Count is already zero, cannot decrement\n", + Object)); + } + + ACPI_DEBUG_PRINT_RAW ((ACPI_DB_ALLOCATIONS, + "%s: Obj %p Type %.2X Refs %.2X [Decremented]\n", + ACPI_GET_FUNCTION_NAME, Object, Object->Common.Type, NewCount)); + + /* Actually delete the object on a reference count of zero */ + + if (NewCount == 0) + { + AcpiUtDeleteInternalObj (Object); + } + Message = "Decrement"; + break; + + default: + + AcpiOsReleaseLock (AcpiGbl_ReferenceCountLock, LockFlags); + ACPI_ERROR ((AE_INFO, "Unknown Reference Count action (0x%X)", + Action)); + return; + } + + /* + * Sanity check the reference count, for debug purposes only. + * (A deleted object will have a huge reference count) + */ + if (NewCount > ACPI_MAX_REFERENCE_COUNT) + { + ACPI_WARNING ((AE_INFO, + "Large Reference Count (0x%X) in object %p, Type=0x%.2X Operation=%s", + NewCount, Object, Object->Common.Type, Message)); + } +} + + +/******************************************************************************* + * + * FUNCTION: AcpiUtUpdateObjectReference + * + * PARAMETERS: Object - Increment or decrement the ref count for + * this object and all sub-objects + * Action - Either REF_INCREMENT or REF_DECREMENT + * + * RETURN: Status + * + * DESCRIPTION: Increment or decrement 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_OPERAND_OBJECT *PrevObject; + ACPI_GENERIC_STATE *State; + UINT32 i; + + + ACPI_FUNCTION_NAME (UtUpdateObjectReference); + + + 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 (AE_OK); + } + + /* + * All sub-objects must have their reference count updated + * 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) + * Two lists, system and device notify handlers. + */ + for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++) + { + PrevObject = Object->CommonNotify.NotifyList[i]; + while (PrevObject) + { + NextObject = PrevObject->Notify.Next[i]; + AcpiUtUpdateRefCount (PrevObject, Action); + PrevObject = NextObject; + } + } + 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++) + { + /* + * Null package elements are legal and can be simply + * ignored. + */ + NextObject = Object->Package.Elements[i]; + if (!NextObject) + { + continue; + } + + switch (NextObject->Common.Type) + { + case ACPI_TYPE_INTEGER: + case ACPI_TYPE_STRING: + case ACPI_TYPE_BUFFER: + /* + * For these very simple sub-objects, we can just + * update the reference count here and continue. + * Greatly increases performance of this operation. + */ + AcpiUtUpdateRefCount (NextObject, Action); + break; + + default: + /* + * For complex sub-objects, push them onto the stack + * for later processing (this eliminates recursion.) + */ + Status = AcpiUtCreateUpdateStateAndPush ( + NextObject, Action, &StateList); + if (ACPI_FAILURE (Status)) + { + goto ErrorExit; + } + break; + } + } + + NextObject = NULL; + break; + + case ACPI_TYPE_BUFFER_FIELD: + + NextObject = Object->BufferField.BufferObj; + 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_LOCAL_REGION_FIELD: + 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 (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 (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_NAME (UtAddReference); + + + /* Ensure that we have a valid object */ + + if (!AcpiUtValidInternalObject (Object)) + { + return; + } + + 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; +} + + +/******************************************************************************* + * + * 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_NAME (UtRemoveReference); + + + /* + * 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; + } + + /* Ensure that we have a valid object */ + + if (!AcpiUtValidInternalObject (Object)) + { + return; + } + + ACPI_DEBUG_PRINT_RAW ((ACPI_DB_ALLOCATIONS, + "%s: Obj %p Current Refs=%X [To Be Decremented]\n", + ACPI_GET_FUNCTION_NAME, 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; +} |