utcopy.c File Reference

#include "acpi.h"
#include "accommon.h"
#include "acnamesp.h"

Include dependency graph for utcopy.c:

Go to the source code of this file.

Macros
#define	_COMPONENT   ACPI_UTILITIES

Functions
static ACPI_STATUS	AcpiUtCopyIsimpleToEsimple (ACPI_OPERAND_OBJECT *InternalObject, ACPI_OBJECT *ExternalObject, UINT8 *DataSpace, ACPI_SIZE *BufferSpaceUsed)
static ACPI_STATUS	AcpiUtCopyIelementToIelement (UINT8 ObjectType, ACPI_OPERAND_OBJECT *SourceObject, ACPI_GENERIC_STATE *State, void *Context)
static ACPI_STATUS	AcpiUtCopyIpackageToEpackage (ACPI_OPERAND_OBJECT *InternalObject, UINT8 *Buffer, ACPI_SIZE *SpaceUsed)
static ACPI_STATUS	AcpiUtCopyEsimpleToIsimple (ACPI_OBJECT *UserObj, ACPI_OPERAND_OBJECT **ReturnObj)
static ACPI_STATUS	AcpiUtCopyEpackageToIpackage (ACPI_OBJECT *ExternalObject, ACPI_OPERAND_OBJECT **InternalObject)
static ACPI_STATUS	AcpiUtCopySimpleObject (ACPI_OPERAND_OBJECT *SourceDesc, ACPI_OPERAND_OBJECT *DestDesc)
static ACPI_STATUS	AcpiUtCopyIelementToEelement (UINT8 ObjectType, ACPI_OPERAND_OBJECT *SourceObject, ACPI_GENERIC_STATE *State, void *Context)
static ACPI_STATUS	AcpiUtCopyIpackageToIpackage (ACPI_OPERAND_OBJECT *SourceObj, ACPI_OPERAND_OBJECT *DestObj, ACPI_WALK_STATE *WalkState)
ACPI_STATUS	AcpiUtCopyIobjectToEobject (ACPI_OPERAND_OBJECT *InternalObject, ACPI_BUFFER *RetBuffer)
ACPI_STATUS	AcpiUtCopyEobjectToIobject (ACPI_OBJECT *ExternalObject, ACPI_OPERAND_OBJECT **InternalObject)
ACPI_STATUS	AcpiUtCopyIobjectToIobject (ACPI_OPERAND_OBJECT *SourceDesc, ACPI_OPERAND_OBJECT **DestDesc, ACPI_WALK_STATE *WalkState)

Macro Definition Documentation

_COMPONENT

#define _COMPONENT   ACPI_UTILITIES

Definition at line 49 of file utcopy.c.

Function Documentation

AcpiUtCopyEobjectToIobject()

ACPI_STATUS AcpiUtCopyEobjectToIobject	(	ACPI_OBJECT *	ExternalObject,
		ACPI_OPERAND_OBJECT **	InternalObject
	)

Definition at line 670 of file utcopy.c.

{
    ACPI_STATUS             Status;
 
 
    ACPI_FUNCTION_TRACE (UtCopyEobjectToIobject);
 
 
    if (ExternalObject->Type == ACPI_TYPE_PACKAGE)
    {
        Status = AcpiUtCopyEpackageToIpackage (
            ExternalObject, InternalObject);
    }
    else
    {
        /*
         * Build a simple object (no nested objects)
         */
        Status = AcpiUtCopyEsimpleToIsimple (ExternalObject,
            InternalObject);
    }
 
    return_ACPI_STATUS (Status);
}

Referenced by AcpiEvaluateObject(), and AcpiUtCopyEpackageToIpackage().

AcpiUtCopyEpackageToIpackage()

static ACPI_STATUS AcpiUtCopyEpackageToIpackage ( ACPI_OBJECT *  ExternalObject, ACPI_OPERAND_OBJECT **  InternalObject  )

static

Definition at line 603 of file utcopy.c.

{
    ACPI_STATUS             Status = AE_OK;
    ACPI_OPERAND_OBJECT     *PackageObject;
    ACPI_OPERAND_OBJECT     **PackageElements;
    UINT32                  i;
 
 
    ACPI_FUNCTION_TRACE (UtCopyEpackageToIpackage);
 
 
    /* Create the package object */
 
    PackageObject = AcpiUtCreatePackageObject (
        ExternalObject->Package.Count);
    if (!PackageObject)
    {
        return_ACPI_STATUS (AE_NO_MEMORY);
    }
 
    PackageElements = PackageObject->Package.Elements;
 
    /*
     * Recursive implementation. Probably ok, since nested external
     * packages as parameters should be very rare.
     */
    for (i = 0; i < ExternalObject->Package.Count; i++)
    {
        Status = AcpiUtCopyEobjectToIobject (
            &ExternalObject->Package.Elements[i],
            &PackageElements[i]);
        if (ACPI_FAILURE (Status))
        {
            /* Truncate package and delete it */
 
            PackageObject->Package.Count = i;
            PackageElements[i] = NULL;
            AcpiUtRemoveReference (PackageObject);
            return_ACPI_STATUS (Status);
        }
    }
 
    /* Mark package data valid */
 
    PackageObject->Package.Flags |= AOPOBJ_DATA_VALID;
 
    *InternalObject = PackageObject;
    return_ACPI_STATUS (Status);
}

Referenced by AcpiUtCopyEobjectToIobject().

AcpiUtCopyEsimpleToIsimple()

static ACPI_STATUS AcpiUtCopyEsimpleToIsimple ( ACPI_OBJECT *  UserObj, ACPI_OPERAND_OBJECT **  ReturnObj  )

static

Definition at line 471 of file utcopy.c.

{
    ACPI_OPERAND_OBJECT     *InternalObject;
 
 
    ACPI_FUNCTION_TRACE (UtCopyEsimpleToIsimple);
 
 
    /*
     * Simple types supported are: String, Buffer, Integer
     */
    switch (ExternalObject->Type)
    {
    case ACPI_TYPE_STRING:
    case ACPI_TYPE_BUFFER:
    case ACPI_TYPE_INTEGER:
    case ACPI_TYPE_LOCAL_REFERENCE:
 
        InternalObject = AcpiUtCreateInternalObject (
            (UINT8) ExternalObject->Type);
        if (!InternalObject)
        {
            return_ACPI_STATUS (AE_NO_MEMORY);
        }
        break;
 
    case ACPI_TYPE_ANY: /* This is the case for a NULL object */
 
        *RetInternalObject = NULL;
        return_ACPI_STATUS (AE_OK);
 
    default:
 
        /* All other types are not supported */
 
        ACPI_ERROR ((AE_INFO,
            "Unsupported object type, cannot convert to internal object: %s",
            AcpiUtGetTypeName (ExternalObject->Type)));
 
        return_ACPI_STATUS (AE_SUPPORT);
    }
 
 
    /* Must COPY string and buffer contents */
 
    switch (ExternalObject->Type)
    {
    case ACPI_TYPE_STRING:
 
        InternalObject->String.Pointer =
            ACPI_ALLOCATE_ZEROED ((ACPI_SIZE)
                ExternalObject->String.Length + 1);
 
        if (!InternalObject->String.Pointer)
        {
            goto ErrorExit;
        }
 
        memcpy (InternalObject->String.Pointer,
            ExternalObject->String.Pointer,
            ExternalObject->String.Length);
 
        InternalObject->String.Length = ExternalObject->String.Length;
        break;
 
    case ACPI_TYPE_BUFFER:
 
        InternalObject->Buffer.Pointer =
            ACPI_ALLOCATE_ZEROED (ExternalObject->Buffer.Length);
        if (!InternalObject->Buffer.Pointer)
        {
            goto ErrorExit;
        }
 
        memcpy (InternalObject->Buffer.Pointer,
            ExternalObject->Buffer.Pointer,
            ExternalObject->Buffer.Length);
 
        InternalObject->Buffer.Length = ExternalObject->Buffer.Length;
 
        /* Mark buffer data valid */
 
        InternalObject->Buffer.Flags |= AOPOBJ_DATA_VALID;
        break;
 
    case ACPI_TYPE_INTEGER:
 
        InternalObject->Integer.Value = ExternalObject->Integer.Value;
        break;
 
    case ACPI_TYPE_LOCAL_REFERENCE:
 
        /* An incoming reference is defined to be a namespace node */
 
        InternalObject->Reference.Class = ACPI_REFCLASS_REFOF;
        InternalObject->Reference.Object = ExternalObject->Reference.Handle;
        break;
 
    default:
 
        /* Other types can't get here */
 
        break;
    }
 
    *RetInternalObject = InternalObject;
    return_ACPI_STATUS (AE_OK);
 
 
ErrorExit:
    AcpiUtRemoveReference (InternalObject);
    return_ACPI_STATUS (AE_NO_MEMORY);
}

Referenced by AcpiUtCopyEobjectToIobject().

AcpiUtCopyIelementToEelement()

static ACPI_STATUS AcpiUtCopyIelementToEelement ( UINT8  ObjectType, ACPI_OPERAND_OBJECT *  SourceObject, ACPI_GENERIC_STATE *  State, void *  Context  )

static

Definition at line 262 of file utcopy.c.

{
    ACPI_STATUS             Status = AE_OK;
    ACPI_PKG_INFO           *Info = (ACPI_PKG_INFO *) Context;
    ACPI_SIZE               ObjectSpace;
    UINT32                  ThisIndex;
    ACPI_OBJECT             *TargetObject;
 
 
    ACPI_FUNCTION_ENTRY ();
 
 
    ThisIndex = State->Pkg.Index;
    TargetObject = (ACPI_OBJECT *) &((ACPI_OBJECT *)
        (State->Pkg.DestObject))->Package.Elements[ThisIndex];
 
    switch (ObjectType)
    {
    case ACPI_COPY_TYPE_SIMPLE:
        /*
         * This is a simple or null object
         */
        Status = AcpiUtCopyIsimpleToEsimple (SourceObject,
            TargetObject, Info->FreeSpace, &ObjectSpace);
        if (ACPI_FAILURE (Status))
        {
            return (Status);
        }
        break;
 
    case ACPI_COPY_TYPE_PACKAGE:
        /*
         * Build the package object
         */
        TargetObject->Type = ACPI_TYPE_PACKAGE;
        TargetObject->Package.Count = SourceObject->Package.Count;
        TargetObject->Package.Elements =
            ACPI_CAST_PTR (ACPI_OBJECT, Info->FreeSpace);
 
        /*
         * Pass the new package object back to the package walk routine
         */
        State->Pkg.ThisTargetObj = TargetObject;
 
        /*
         * Save space for the array of objects (Package elements)
         * update the buffer length counter
         */
        ObjectSpace = ACPI_ROUND_UP_TO_NATIVE_WORD (
            (ACPI_SIZE) TargetObject->Package.Count *
            sizeof (ACPI_OBJECT));
        break;
 
    default:
 
        return (AE_BAD_PARAMETER);
    }
 
    Info->FreeSpace += ObjectSpace;
    Info->Length += ObjectSpace;
    return (Status);
}

Referenced by AcpiUtCopyIpackageToEpackage().

AcpiUtCopyIelementToIelement()

static ACPI_STATUS AcpiUtCopyIelementToIelement ( UINT8  ObjectType, ACPI_OPERAND_OBJECT *  SourceObject, ACPI_GENERIC_STATE *  State, void *  Context  )

static

Definition at line 873 of file utcopy.c.

{
    ACPI_STATUS             Status = AE_OK;
    UINT32                  ThisIndex;
    ACPI_OPERAND_OBJECT     **ThisTargetPtr;
    ACPI_OPERAND_OBJECT     *TargetObject;
 
 
    ACPI_FUNCTION_ENTRY ();
 
 
    ThisIndex = State->Pkg.Index;
    ThisTargetPtr = (ACPI_OPERAND_OBJECT **)
        &State->Pkg.DestObject->Package.Elements[ThisIndex];
 
    switch (ObjectType)
    {
    case ACPI_COPY_TYPE_SIMPLE:
 
        /* A null source object indicates a (legal) null package element */
 
        if (SourceObject)
        {
            /*
             * This is a simple object, just copy it
             */
            TargetObject = AcpiUtCreateInternalObject (
                SourceObject->Common.Type);
            if (!TargetObject)
            {
                return (AE_NO_MEMORY);
            }
 
            Status = AcpiUtCopySimpleObject (SourceObject, TargetObject);
            if (ACPI_FAILURE (Status))
            {
                goto ErrorExit;
            }
 
            *ThisTargetPtr = TargetObject;
        }
        else
        {
            /* Pass through a null element */
 
            *ThisTargetPtr = NULL;
        }
        break;
 
    case ACPI_COPY_TYPE_PACKAGE:
        /*
         * This object is a package - go down another nesting level
         * Create and build the package object
         */
        TargetObject = AcpiUtCreatePackageObject (
            SourceObject->Package.Count);
        if (!TargetObject)
        {
            return (AE_NO_MEMORY);
        }
 
        TargetObject->Common.Flags = SourceObject->Common.Flags;
 
        /* Pass the new package object back to the package walk routine */
 
        State->Pkg.ThisTargetObj = TargetObject;
 
        /* Store the object pointer in the parent package object */
 
        *ThisTargetPtr = TargetObject;
        break;
 
    default:
 
        return (AE_BAD_PARAMETER);
    }
 
    return (Status);
 
ErrorExit:
    AcpiUtRemoveReference (TargetObject);
    return (Status);
}

Referenced by AcpiUtCopyIpackageToIpackage().

AcpiUtCopyIobjectToEobject()

ACPI_STATUS AcpiUtCopyIobjectToEobject	(	ACPI_OPERAND_OBJECT *	InternalObject,
		ACPI_BUFFER *	RetBuffer
	)

Definition at line 414 of file utcopy.c.

{
    ACPI_STATUS             Status;
 
 
    ACPI_FUNCTION_TRACE (UtCopyIobjectToEobject);
 
 
    if (InternalObject->Common.Type == ACPI_TYPE_PACKAGE)
    {
        /*
         * Package object:  Copy all subobjects (including
         * nested packages)
         */
        Status = AcpiUtCopyIpackageToEpackage (InternalObject,
            RetBuffer->Pointer, &RetBuffer->Length);
    }
    else
    {
        /*
         * Build a simple object (no nested objects)
         */
        Status = AcpiUtCopyIsimpleToEsimple (InternalObject,
            ACPI_CAST_PTR (ACPI_OBJECT, RetBuffer->Pointer),
            ACPI_ADD_PTR (UINT8, RetBuffer->Pointer,
                ACPI_ROUND_UP_TO_NATIVE_WORD (sizeof (ACPI_OBJECT))),
            &RetBuffer->Length);
        /*
         * build simple does not include the object size in the length
         * so we add it in here
         */
        RetBuffer->Length += sizeof (ACPI_OBJECT);
    }
 
    return_ACPI_STATUS (Status);
}

Referenced by AcpiEvaluateObject().

AcpiUtCopyIobjectToIobject()

ACPI_STATUS AcpiUtCopyIobjectToIobject	(	ACPI_OPERAND_OBJECT *	SourceDesc,
		ACPI_OPERAND_OBJECT **	DestDesc,
		ACPI_WALK_STATE *	WalkState
	)

Definition at line 1037 of file utcopy.c.

{
    ACPI_STATUS             Status = AE_OK;
 
 
    ACPI_FUNCTION_TRACE (UtCopyIobjectToIobject);
 
 
    /* Create the top level object */
 
    *DestDesc = AcpiUtCreateInternalObject (SourceDesc->Common.Type);
    if (!*DestDesc)
    {
        return_ACPI_STATUS (AE_NO_MEMORY);
    }
 
    /* Copy the object and possible subobjects */
 
    if (SourceDesc->Common.Type == ACPI_TYPE_PACKAGE)
    {
        Status = AcpiUtCopyIpackageToIpackage (
            SourceDesc, *DestDesc, WalkState);
    }
    else
    {
        Status = AcpiUtCopySimpleObject (SourceDesc, *DestDesc);
    }
 
    /* Delete the allocated object if copy failed */
 
    if (ACPI_FAILURE (Status))
    {
        AcpiUtRemoveReference (*DestDesc);
    }
 
    return_ACPI_STATUS (Status);
}

Referenced by AcpiDsEvaluateNamePath(), AcpiDsStoreObjectToLocal(), AcpiExOpcode_1A_1T_1R(), AcpiExStoreDirectToNode(), AcpiExStoreObjectToIndex(), and AcpiExStoreObjectToObject().

AcpiUtCopyIpackageToEpackage()

static ACPI_STATUS AcpiUtCopyIpackageToEpackage ( ACPI_OPERAND_OBJECT *  InternalObject, UINT8 *  Buffer, ACPI_SIZE *  SpaceUsed  )

static

Definition at line 350 of file utcopy.c.

{
    ACPI_OBJECT             *ExternalObject;
    ACPI_STATUS             Status;
    ACPI_PKG_INFO           Info;
 
 
    ACPI_FUNCTION_TRACE (UtCopyIpackageToEpackage);
 
 
    /*
     * First package at head of the buffer
     */
    ExternalObject = ACPI_CAST_PTR (ACPI_OBJECT, Buffer);
 
    /*
     * Free space begins right after the first package
     */
    Info.Length = ACPI_ROUND_UP_TO_NATIVE_WORD (sizeof (ACPI_OBJECT));
    Info.FreeSpace = Buffer +
        ACPI_ROUND_UP_TO_NATIVE_WORD (sizeof (ACPI_OBJECT));
    Info.ObjectSpace = 0;
    Info.NumPackages = 1;
 
    ExternalObject->Type = InternalObject->Common.Type;
    ExternalObject->Package.Count = InternalObject->Package.Count;
    ExternalObject->Package.Elements =
        ACPI_CAST_PTR (ACPI_OBJECT, Info.FreeSpace);
 
    /*
     * Leave room for an array of ACPI_OBJECTS in the buffer
     * and move the free space past it
     */
    Info.Length += (ACPI_SIZE) ExternalObject->Package.Count *
        ACPI_ROUND_UP_TO_NATIVE_WORD (sizeof (ACPI_OBJECT));
    Info.FreeSpace += ExternalObject->Package.Count *
        ACPI_ROUND_UP_TO_NATIVE_WORD (sizeof (ACPI_OBJECT));
 
    Status = AcpiUtWalkPackageTree (InternalObject, ExternalObject,
        AcpiUtCopyIelementToEelement, &Info);
 
    *SpaceUsed = Info.Length;
    return_ACPI_STATUS (Status);
}

Referenced by AcpiUtCopyIobjectToEobject().

AcpiUtCopyIpackageToIpackage()

static ACPI_STATUS AcpiUtCopyIpackageToIpackage ( ACPI_OPERAND_OBJECT *  SourceObj, ACPI_OPERAND_OBJECT *  DestObj, ACPI_WALK_STATE *  WalkState  )

static

Definition at line 978 of file utcopy.c.

{
    ACPI_STATUS             Status = AE_OK;
 
 
    ACPI_FUNCTION_TRACE (UtCopyIpackageToIpackage);
 
 
    DestObj->Common.Type = SourceObj->Common.Type;
    DestObj->Common.Flags = SourceObj->Common.Flags;
    DestObj->Package.Count = SourceObj->Package.Count;
 
    /*
     * Create the object array and walk the source package tree
     */
    DestObj->Package.Elements = ACPI_ALLOCATE_ZEROED (
        ((ACPI_SIZE) SourceObj->Package.Count + 1) *
        sizeof (void *));
    if (!DestObj->Package.Elements)
    {
        ACPI_ERROR ((AE_INFO, "Package allocation failure"));
        return_ACPI_STATUS (AE_NO_MEMORY);
    }
 
    /*
     * Copy the package element-by-element by walking the package "tree".
     * This handles nested packages of arbitrary depth.
     */
    Status = AcpiUtWalkPackageTree (SourceObj, DestObj,
        AcpiUtCopyIelementToIelement, WalkState);
    if (ACPI_FAILURE (Status))
    {
        /* On failure, delete the destination package object */
 
        AcpiUtRemoveReference (DestObj);
    }
 
    return_ACPI_STATUS (Status);
}

Referenced by AcpiUtCopyIobjectToIobject().

AcpiUtCopyIsimpleToEsimple()

static ACPI_STATUS AcpiUtCopyIsimpleToEsimple ( ACPI_OPERAND_OBJECT *  InternalObject, ACPI_OBJECT *  ExternalObject, UINT8 *  DataSpace, ACPI_SIZE *  BufferSpaceUsed  )

static

Definition at line 124 of file utcopy.c.

{
    ACPI_STATUS             Status = AE_OK;
 
 
    ACPI_FUNCTION_TRACE (UtCopyIsimpleToEsimple);
 
 
    *BufferSpaceUsed = 0;
 
    /*
     * Check for NULL object case (could be an uninitialized
     * package element)
     */
    if (!InternalObject)
    {
        return_ACPI_STATUS (AE_OK);
    }
 
    /* Always clear the external object */
 
    memset (ExternalObject, 0, sizeof (ACPI_OBJECT));
 
    /*
     * In general, the external object will be the same type as
     * the internal object
     */
    ExternalObject->Type = InternalObject->Common.Type;
 
    /* However, only a limited number of external types are supported */
 
    switch (InternalObject->Common.Type)
    {
    case ACPI_TYPE_STRING:
 
        ExternalObject->String.Pointer = (char *) DataSpace;
        ExternalObject->String.Length  = InternalObject->String.Length;
        *BufferSpaceUsed = ACPI_ROUND_UP_TO_NATIVE_WORD (
            (ACPI_SIZE) InternalObject->String.Length + 1);
 
        memcpy ((void *) DataSpace,
            (void *) InternalObject->String.Pointer,
            (ACPI_SIZE) InternalObject->String.Length + 1);
        break;
 
    case ACPI_TYPE_BUFFER:
 
        ExternalObject->Buffer.Pointer = DataSpace;
        ExternalObject->Buffer.Length  = InternalObject->Buffer.Length;
        *BufferSpaceUsed = ACPI_ROUND_UP_TO_NATIVE_WORD (
            InternalObject->String.Length);
 
        memcpy ((void *) DataSpace,
            (void *) InternalObject->Buffer.Pointer,
            InternalObject->Buffer.Length);
        break;
 
    case ACPI_TYPE_INTEGER:
 
        ExternalObject->Integer.Value = InternalObject->Integer.Value;
        break;
 
    case ACPI_TYPE_LOCAL_REFERENCE:
 
        /* This is an object reference. */
 
        switch (InternalObject->Reference.Class)
        {
        case ACPI_REFCLASS_NAME:
            /*
             * For namepath, return the object handle ("reference")
             * We are referring to the namespace node
             */
            ExternalObject->Reference.Handle =
                InternalObject->Reference.Node;
            ExternalObject->Reference.ActualType =
                AcpiNsGetType (InternalObject->Reference.Node);
            break;
 
        default:
 
            /* All other reference types are unsupported */
 
            return_ACPI_STATUS (AE_TYPE);
        }
        break;
 
    case ACPI_TYPE_PROCESSOR:
 
        ExternalObject->Processor.ProcId =
            InternalObject->Processor.ProcId;
        ExternalObject->Processor.PblkAddress =
            InternalObject->Processor.Address;
        ExternalObject->Processor.PblkLength =
            InternalObject->Processor.Length;
        break;
 
    case ACPI_TYPE_POWER:
 
        ExternalObject->PowerResource.SystemLevel =
            InternalObject->PowerResource.SystemLevel;
 
        ExternalObject->PowerResource.ResourceOrder =
            InternalObject->PowerResource.ResourceOrder;
        break;
 
    default:
        /*
         * There is no corresponding external object type
         */
        ACPI_ERROR ((AE_INFO,
            "Unsupported object type, cannot convert to external object: %s",
            AcpiUtGetTypeName (InternalObject->Common.Type)));
 
        return_ACPI_STATUS (AE_SUPPORT);
    }
 
    return_ACPI_STATUS (Status);
}

Referenced by AcpiUtCopyIelementToEelement(), and AcpiUtCopyIobjectToEobject().

AcpiUtCopySimpleObject()

static ACPI_STATUS AcpiUtCopySimpleObject ( ACPI_OPERAND_OBJECT *  SourceDesc, ACPI_OPERAND_OBJECT *  DestDesc  )

static

Definition at line 713 of file utcopy.c.

{
    UINT16                  ReferenceCount;
    ACPI_OPERAND_OBJECT     *NextObject;
    ACPI_STATUS             Status;
    ACPI_SIZE               CopySize;
 
 
    /* Save fields from destination that we don't want to overwrite */
 
    ReferenceCount = DestDesc->Common.ReferenceCount;
    NextObject = DestDesc->Common.NextObject;
 
    /*
     * Copy the entire source object over the destination object.
     * Note: Source can be either an operand object or namespace node.
     */
    CopySize = sizeof (ACPI_OPERAND_OBJECT);
    if (ACPI_GET_DESCRIPTOR_TYPE (SourceDesc) == ACPI_DESC_TYPE_NAMED)
    {
        CopySize = sizeof (ACPI_NAMESPACE_NODE);
    }
 
    memcpy (ACPI_CAST_PTR (char, DestDesc),
        ACPI_CAST_PTR (char, SourceDesc), CopySize);
 
    /* Restore the saved fields */
 
    DestDesc->Common.ReferenceCount = ReferenceCount;
    DestDesc->Common.NextObject = NextObject;
 
    /* New object is not static, regardless of source */
 
    DestDesc->Common.Flags &= ~AOPOBJ_STATIC_POINTER;
 
    /* Handle the objects with extra data */
 
    switch (DestDesc->Common.Type)
    {
    case ACPI_TYPE_BUFFER:
        /*
         * Allocate and copy the actual buffer if and only if:
         * 1) There is a valid buffer pointer
         * 2) The buffer has a length > 0
         */
        if ((SourceDesc->Buffer.Pointer) &&
            (SourceDesc->Buffer.Length))
        {
            DestDesc->Buffer.Pointer =
                ACPI_ALLOCATE (SourceDesc->Buffer.Length);
            if (!DestDesc->Buffer.Pointer)
            {
                return (AE_NO_MEMORY);
            }
 
            /* Copy the actual buffer data */
 
            memcpy (DestDesc->Buffer.Pointer,
                SourceDesc->Buffer.Pointer, SourceDesc->Buffer.Length);
        }
        break;
 
    case ACPI_TYPE_STRING:
        /*
         * Allocate and copy the actual string if and only if:
         * 1) There is a valid string pointer
         * (Pointer to a NULL string is allowed)
         */
        if (SourceDesc->String.Pointer)
        {
            DestDesc->String.Pointer =
                ACPI_ALLOCATE ((ACPI_SIZE) SourceDesc->String.Length + 1);
            if (!DestDesc->String.Pointer)
            {
                return (AE_NO_MEMORY);
            }
 
            /* Copy the actual string data */
 
            memcpy (DestDesc->String.Pointer, SourceDesc->String.Pointer,
                (ACPI_SIZE) SourceDesc->String.Length + 1);
        }
        break;
 
    case ACPI_TYPE_LOCAL_REFERENCE:
        /*
         * We copied the reference object, so we now must add a reference
         * to the object pointed to by the reference
         *
         * DDBHandle reference (from Load/LoadTable) is a special reference,
         * it does not have a Reference.Object, so does not need to
         * increase the reference count
         */
        if (SourceDesc->Reference.Class == ACPI_REFCLASS_TABLE)
        {
            break;
        }
 
        AcpiUtAddReference (SourceDesc->Reference.Object);
        break;
 
    case ACPI_TYPE_REGION:
        /*
         * We copied the Region Handler, so we now must add a reference
         */
        if (DestDesc->Region.Handler)
        {
            AcpiUtAddReference (DestDesc->Region.Handler);
        }
        break;
 
    /*
     * For Mutex and Event objects, we cannot simply copy the underlying
     * OS object. We must create a new one.
     */
    case ACPI_TYPE_MUTEX:
 
        Status = AcpiOsCreateMutex (&DestDesc->Mutex.OsMutex);
        if (ACPI_FAILURE (Status))
        {
            return (Status);
        }
        break;
 
    case ACPI_TYPE_EVENT:
 
        Status = AcpiOsCreateSemaphore (ACPI_NO_UNIT_LIMIT, 0,
            &DestDesc->Event.OsSemaphore);
        if (ACPI_FAILURE (Status))
        {
            return (Status);
        }
        break;
 
    default:
 
        /* Nothing to do for other simple objects */
 
        break;
    }
 
    return (AE_OK);
}

Referenced by AcpiUtCopyIelementToIelement(), and AcpiUtCopyIobjectToIobject().