[r7647]: sandbox / jlf / trunk / interpreter / classes / StackFrameClass.cpp  Maximize  Restore  History

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/*----------------------------------------------------------------------------*/
/* */
/* Copyright (c) 1995, 2004 IBM Corporation. All rights reserved. */
/* Copyright (c) 2005-2009 Rexx Language Association. All rights reserved. */
/* */
/* This program and the accompanying materials are made available under */
/* the terms of the Common Public License v1.0 which accompanies this */
/* distribution. A copy is also available at the following address: */
/* http://www.ibm.com/developerworks/oss/CPLv1.0.htm */
/* */
/* Redistribution and use in source and binary forms, with or */
/* without modification, are permitted provided that the following */
/* conditions are met: */
/* */
/* Redistributions of source code must retain the above copyright */
/* notice, this list of conditions and the following disclaimer. */
/* Redistributions in binary form must reproduce the above copyright */
/* notice, this list of conditions and the following disclaimer in */
/* the documentation and/or other materials provided with the distribution. */
/* */
/* Neither the name of Rexx Language Association nor the names */
/* of its 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. */
/* */
/*----------------------------------------------------------------------------*/
/******************************************************************************/
/* REXX Kernel */
/* */
/* Primitive Rexx execution context */
/* */
/******************************************************************************/
#include "RexxCore.h"
#include "StackFrameClass.hpp"
#include "ProtectedObject.hpp"
RexxClass *StackFrameClass::classInstance = OREF_NULL; // singleton class instance
/**
* Create initial bootstrap objects
*/
void StackFrameClass::createInstance()
{
CLASS_CREATE(StackFrame, "StackFrame", RexxClass);
}
/**
* Allocate a new StackFrame object
*
* @param size The size of the object.
*
* @return The newly allocated object.
*/
void *StackFrameClass::operator new(size_t size)
{
/* Get new object */
return new_object(size, T_StackFrame);
}
/**
* Allocate a new GC-protected StackFrame object
*
* @param size The size of the object.
* @param p The protected object
*
* @return The newly allocated object.
*/
void *StackFrameClass::operator new(size_t size, ProtectedObject &p)
{
/* Get new object */
p = new_object(size, T_StackFrame);
return p;
}
/**
* Constructor for a StackFrame object.
*
* @param a The activation we're attached to.
*/
StackFrameClass::StackFrameClass(const char *ty, RexxString *n, BaseExecutable *e, RexxObject *tg, RexxArray *a, RexxString *t, size_t l)
{
type = ty;
name = n;
executable = e;
target = tg;
arguments = a;
traceLine = t;
line = l;
}
/**
* The Rexx accessible class NEW method. This raises an
* error because StackFrame objects can only be created by the
* internal interpreter.
*
* @param args The NEW args
* @param argc The count of arguments
*
* @return Never returns.
*/
RexxObject *StackFrameClass::newRexx(RexxObject **args, size_t argc)
{
// we do not allow these to be allocated from Rexx code...
reportException(Error_Unsupported_new_method, ((RexxClass *)this)->getId());
return TheNilObject;
}
void StackFrameClass::live(size_t liveMark)
/******************************************************************************/
/* Function: Normal garbage collection live marking */
/******************************************************************************/
{
memory_mark(this->name);
memory_mark(this->executable);
memory_mark(this->traceLine);
memory_mark(this->arguments);
memory_mark(this->target);
memory_mark(this->objectVariables);
}
void StackFrameClass::liveGeneral(int reason)
/******************************************************************************/
/* Function: Generalized object marking */
/******************************************************************************/
{
memory_mark_general(this->name);
memory_mark_general(this->executable);
memory_mark_general(this->traceLine);
memory_mark_general(this->arguments);
memory_mark_general(this->target);
memory_mark_general(this->objectVariables);
}
void StackFrameClass::flatten(RexxEnvelope *envelope)
/******************************************************************************/
/* Function: Flatten an object */
/******************************************************************************/
{
setUpFlatten(StackFrameClass)
newThis->name = OREF_NULL; // this never should be getting flattened, so sever the connection
newThis->executable = OREF_NULL;
newThis->traceLine = OREF_NULL;
newThis->arguments = OREF_NULL;
newThis->target = OREF_NULL;
newThis->objectVariables = OREF_NULL;
cleanUpFlatten
}
/**
* Return the frame type used to invoke the executable
*
* @return The string name of the frame type.
*/
RexxString *StackFrameClass::getType()
{
return new_string(type);
}
/**
* Return the name used to invoke the executable
*
* @return The message or routine name (or program name, for a
* top-level invocation
*/
RexxString *StackFrameClass::getName()
{
return name;
}
/**
* Return a trace line for this stack frame
*
* @return The message or routine name (or program name, for a
* top-level invocation
*/
RexxString *StackFrameClass::getTraceLine()
{
return traceLine;
}
/**
* Return the stack frame current line position.
*
* @return The current line number of the context.
*/
RexxObject *StackFrameClass::getExecutable()
{
if (executable == OREF_NULL)
{
return TheNilObject;
}
return executable;
}
/**
* Return the execution context current line position.
*
* @return The current line number of the context.
*/
RexxObject *StackFrameClass::getLine()
{
if (line == SIZE_MAX)
{
return TheNilObject;
}
else
{
return new_integer(line);
}
}
/**
* Return an array of arguments to the current activation.
*
* @return An array of arguments. Returns an empty array if no
* arguments.
*/
RexxArray *StackFrameClass::getArguments()
{
if (arguments == OREF_NULL)
{
return new_array((size_t)0);
}
else
{
return arguments;
}
}
/**
* Get the source object associated with the stack frame.
*
* @return The Source object instance for the stack frame.
*/
RexxSource *StackFrameClass::getSourceObject()
{
if (executable == OREF_NULL)
{
return OREF_NULL;
}
return executable->getSourceObject();
}
/**
* Get the message target if this is a method call.
*
* @return The target object, or .nil if this stack frame is not for a method call.
*/
RexxObject *StackFrameClass::getTarget()
{
if (target == OREF_NULL)
{
return TheNilObject;
}
return target;
}