RE: Memory Management: Revamped Engine Example
RE: Memory Management: Revamped Engine Example
- Subject: RE: Memory Management: Revamped Engine Example
- From: Jordan Evans <email@hidden>
- Date: Sun, 1 Jan 2006 02:12:41 -0800 (PST)
1. I added a EnginePart Class and made each engine
part a subclass of the EnginePart Class.
2. I removed the superfluous pointer.
3. I added the NSMutableIndexSet.
Thanks Chris Hanson.
I have to get some more practice in, but I think the
NSIndexSet is going to be handy. Is there anything
else that could be done to straighten this thing up?
Source code attached.
#import <Foundation/Foundation.h>
//EngineParts Class
@interface EngineParts : NSObject{} @end
@implementation EngineParts @end
//Individual Sub-Classes of EngineParts Class
@interface CombustionChamber : EngineParts{} @end
@implementation CombustionChamber @end
@interface Compressor : EngineParts{} @end
@implementation Compressor @end
@interface FuelInjector : EngineParts{} @end
@implementation FuelInjector @end
@interface Shaft : EngineParts{} @end
@implementation Shaft @end
@interface Turbine : EngineParts{} @end
@implementation Turbine @end
@interface Engine : NSObject
{
NSMutableArray *enginePartsArray;
}
- (id)init;
- (void)maintenance:(NSMutableIndexSet*)badParts;
@end
@implementation Engine
- (id)init;
{
int i;
[super init];
enginePartsArray = [[NSMutableArray alloc] init];
[enginePartsArray addObject:[[CombustionChamber
alloc] init]];
[enginePartsArray addObject:[[Compressor alloc]
init]];
[enginePartsArray addObject:[[FuelInjector alloc]
init]];
[enginePartsArray addObject:[[FuelInjector alloc]
init]];
[enginePartsArray addObject:[[Shaft alloc] init]];
[enginePartsArray addObject:[[Turbine alloc] init]];
for( i=0; i<[enginePartsArray count]; i++ )
[[enginePartsArray objectAtIndex:i] release];
return self;
}
- (void)dealloc;
{
[enginePartsArray release];
[super dealloc];
}
- (void)maintenance:(NSMutableIndexSet*)badParts
{
int i, part, partCount;
id PartClass;
NSLog(@"Parts before maintenance:\n");
for(i=0; i<[enginePartsArray count]; i++)
NSLog(@"Part%i: %@", i, [[enginePartsArray
objectAtIndex:i] description]);
partCount = [badParts count];
for( i=0; i<partCount; i++ )
{
part = [badParts firstIndex];
PartClass = [[enginePartsArray objectAtIndex:part]
class];
[enginePartsArray replaceObjectAtIndex:[badParts
firstIndex] withObject:[[PartClass alloc] init]];
[[enginePartsArray objectAtIndex:part] release];
[badParts removeIndex:part];
}
NSLog(@"Parts after maintenance:\n");
for(i=0; i<[enginePartsArray count]; i++)
NSLog(@"Part%i: %@", i, [[enginePartsArray
objectAtIndex:i] description]);
printf("\n");
}
@end
int main (int argc, const char *argv[])
{
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc]
init];
Engine *myEngine = [[[Engine alloc] init]
autorelease];
NSMutableIndexSet *badPartsIndexSet1 =
[[NSMutableIndexSet alloc] init];
NSMutableIndexSet *badPartsIndexSet2 =
[[NSMutableIndexSet alloc] init];
[badPartsIndexSet1 addIndex:0];
[badPartsIndexSet1 addIndex:1];
[badPartsIndexSet2 addIndex:5];
[myEngine maintenance:badPartsIndexSet1];
[myEngine maintenance:badPartsIndexSet2];
[badPartsIndexSet1 release];
[badPartsIndexSet2 release];
[pool release];
return 0;
}
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MemoryEngine.m
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