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/**
STExecutionContext.m
Copyright (c) 2002 Free Software Foundation
This file is part of the StepTalk project.
*/
#import "STExecutionContext.h"
#import "STMethodContext.h"
#import "STStack.h"
#import <Foundation/NSDebug.h>
#import <Foundation/NSObject.h>
#import <Foundation/NSString.h>
static NSUInteger nextId = 1;
@interface STExecutionContext(STPrivateMethods)
- (NSUInteger)contextId;
@end
@implementation STExecutionContext
- initWithStackSize:(NSUInteger)stackSize
{
if ((self = [super init]) != nil)
{
stack = [[STStack alloc] initWithSize:stackSize];
contextId = nextId ++;
}
return self;
}
- (void)dealloc
{
RELEASE(stack);
[super dealloc];
}
- (NSUInteger)contextId
{
return contextId;
}
- (NSString *)description
{
NSMutableString *str;
str = [NSMutableString stringWithFormat:
@"%@ %lu (home %lu)",
[self className],
(unsigned long)contextId,
(unsigned long)[[self homeContext] contextId]];
return str;
}
- (void)invalidate
{
instructionPointer = NSNotFound;
}
- (BOOL)isValid
{
return (instructionPointer != NSNotFound);
}
- (NSUInteger)instructionPointer
{
return instructionPointer;
}
- (void)setInstructionPointer:(NSUInteger)value
{
instructionPointer = value;
}
- (STMethodContext *)homeContext
{
[self subclassResponsibility:_cmd];
return nil;
}
- (void)setHomeContext:(STMethodContext *)newContext
{
[self subclassResponsibility:_cmd];
}
- (STStack *)stack
{
return stack;
}
- (BOOL)isBlockContext;
{
[self subclassResponsibility:_cmd];
return NO;
}
- (id)temporaryAtIndex:(NSUInteger)index
{
[self subclassResponsibility:_cmd];
return nil;
}
- (void)setTemporary:anObject atIndex:(NSUInteger)index
{
[self subclassResponsibility:_cmd];
}
- (NSString *)referenceNameAtIndex:(NSUInteger)index
{
[self subclassResponsibility:_cmd];
return nil;
}
- (STBytecodes *)bytecodes
{
[self subclassResponsibility:_cmd];
return nil;
}
- (id)literalObjectAtIndex:(NSUInteger)index
{
[self subclassResponsibility:_cmd];
return nil;
}
- (id)receiver
{
[self subclassResponsibility:_cmd];
return nil;
}
@end
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