Exemplo n.º 1
0
void
AcpiDsDeleteResultIfNotUsed (
    ACPI_PARSE_OBJECT       *Op,
    ACPI_OPERAND_OBJECT     *ResultObj,
    ACPI_WALK_STATE         *WalkState)
{
    ACPI_OPERAND_OBJECT     *ObjDesc;
    ACPI_STATUS             Status;


    ACPI_FUNCTION_TRACE_PTR (DsDeleteResultIfNotUsed, ResultObj);


    if (!Op)
    {
        ACPI_ERROR ((AE_INFO, "Null Op"));
        return_VOID;
    }

    if (!ResultObj)
    {
        return_VOID;
    }

    if (!AcpiDsIsResultUsed (Op, WalkState))
    {
        /* Must pop the result stack (ObjDesc should be equal to ResultObj) */

        Status = AcpiDsResultPop (&ObjDesc, WalkState);
        if (ACPI_SUCCESS (Status))
        {
            AcpiUtRemoveReference (ResultObj);
        }
    }

    return_VOID;
}
Exemplo n.º 2
0
ACPI_STATUS
AcpiPsNextParseState (
    ACPI_WALK_STATE         *WalkState,
    ACPI_PARSE_OBJECT       *Op,
    ACPI_STATUS             CallbackStatus)
{
    ACPI_PARSE_STATE        *ParserState = &WalkState->ParserState;
    ACPI_STATUS             Status = AE_CTRL_PENDING;


    ACPI_FUNCTION_TRACE_PTR (PsNextParseState, Op);


    switch (CallbackStatus)
    {
    case AE_CTRL_TERMINATE:
        /*
         * A control method was terminated via a RETURN statement.
         * The walk of this method is complete.
         */
        ParserState->Aml = ParserState->AmlEnd;
        Status = AE_CTRL_TERMINATE;
        break;

    case AE_CTRL_BREAK:

        ParserState->Aml = WalkState->AmlLastWhile;
        WalkState->ControlState->Common.Value = FALSE;
        Status = AE_CTRL_BREAK;
        break;

    case AE_CTRL_CONTINUE:

        ParserState->Aml = WalkState->AmlLastWhile;
        Status = AE_CTRL_CONTINUE;
        break;

    case AE_CTRL_PENDING:

        ParserState->Aml = WalkState->AmlLastWhile;
        break;

#if 0
    case AE_CTRL_SKIP:

        ParserState->Aml = ParserState->Scope->ParseScope.PkgEnd;
        Status = AE_OK;
        break;
#endif

    case AE_CTRL_TRUE:
        /*
         * Predicate of an IF was true, and we are at the matching ELSE.
         * Just close out this package
         */
        ParserState->Aml = AcpiPsGetNextPackageEnd (ParserState);
        Status = AE_CTRL_PENDING;
        break;

    case AE_CTRL_FALSE:
        /*
         * Either an IF/WHILE Predicate was false or we encountered a BREAK
         * opcode. In both cases, we do not execute the rest of the
         * package;  We simply close out the parent (finishing the walk of
         * this branch of the tree) and continue execution at the parent
         * level.
         */
        ParserState->Aml = ParserState->Scope->ParseScope.PkgEnd;

        /* In the case of a BREAK, just force a predicate (if any) to FALSE */

        WalkState->ControlState->Common.Value = FALSE;
        Status = AE_CTRL_END;
        break;

    case AE_CTRL_TRANSFER:

        /* A method call (invocation) -- transfer control */

        Status = AE_CTRL_TRANSFER;
        WalkState->PrevOp = Op;
        WalkState->MethodCallOp = Op;
        WalkState->MethodCallNode = (Op->Common.Value.Arg)->Common.Node;

        /* Will return value (if any) be used by the caller? */

        WalkState->ReturnUsed = AcpiDsIsResultUsed (Op, WalkState);
        break;

    default:

        Status = CallbackStatus;
        if ((CallbackStatus & AE_CODE_MASK) == AE_CODE_CONTROL)
        {
            Status = AE_OK;
        }
        break;
    }

    return_ACPI_STATUS (Status);
}
Exemplo n.º 3
0
static ACPI_STATUS
AcpiPsNextParseState (
    ACPI_WALK_STATE         *WalkState,
    ACPI_PARSE_OBJECT       *Op,
    ACPI_STATUS             CallbackStatus)
{
    ACPI_PARSE_STATE        *ParserState = WalkState->ParserState;
    ACPI_STATUS             Status = AE_CTRL_PENDING;
    UINT8                   *Start;
    UINT32                  PackageLength;


    FUNCTION_TRACE_PTR ("PsNextParseState", Op);


    switch (CallbackStatus)
    {
    case AE_CTRL_TERMINATE:

        /*
         * A control method was terminated via a RETURN statement.
         * The walk of this method is complete.
         */
        ParserState->Aml = ParserState->AmlEnd;
        Status = AE_CTRL_TERMINATE;
        break;


    case AE_CTRL_PENDING:

        /*
         * Predicate of a WHILE was true and the loop just completed an
         * execution.  Go back to the start of the loop and reevaluate the
         * predicate.
         */

        /* TBD: How to handle a break within a while. */
        /* This code attempts it */

        ParserState->Aml = WalkState->AmlLastWhile;
        break;


    case AE_CTRL_TRUE:
        /*
         * Predicate of an IF was true, and we are at the matching ELSE.
         * Just close out this package
         *
         * Note: ParserState->Aml is modified by the package length procedure
         * TBD: [Investigate] perhaps it shouldn't, too much trouble
         */
        Start = ParserState->Aml;
        PackageLength = AcpiPsGetNextPackageLength (ParserState);
        ParserState->Aml = Start + PackageLength;
        break;


    case AE_CTRL_FALSE:

        /*
         * Either an IF/WHILE Predicate was false or we encountered a BREAK
         * opcode.  In both cases, we do not execute the rest of the
         * package;  We simply close out the parent (finishing the walk of
         * this branch of the tree) and continue execution at the parent
         * level.
         */
        ParserState->Aml = ParserState->Scope->ParseScope.PkgEnd;

        /* In the case of a BREAK, just force a predicate (if any) to FALSE */

        WalkState->ControlState->Common.Value = FALSE;
        Status = AE_CTRL_END;
        break;


    case AE_CTRL_TRANSFER:

        /*
         * A method call (invocation) -- transfer control
         */
        Status = AE_CTRL_TRANSFER;
        WalkState->PrevOp = Op;
        WalkState->MethodCallOp = Op;
        WalkState->MethodCallNode = (Op->Value.Arg)->Node;

        /* Will return value (if any) be used by the caller? */

        WalkState->ReturnUsed = AcpiDsIsResultUsed (Op, WalkState);
        break;


    default:
        Status = CallbackStatus;
        if ((CallbackStatus & AE_CODE_MASK) == AE_CODE_CONTROL)
        {
            Status = AE_OK;
        }
        break;
    }

    return_ACPI_STATUS (Status);
}