Malloc() Struct with NSString Inside?
Post: #1
I'm creating a Text based struct
typedef struct theText {
NSString *text;
GLint a,b;
}textBase;
textBase *objText;
objText = malloc(sizeof(textBase));
will there be any problem's with doing this considering NSObject's have there own method for Allocating & Freeing memory?
typedef struct theText {
NSString *text;
GLint a,b;
}textBase;
textBase *objText;
objText = malloc(sizeof(textBase));
will there be any problem's with doing this considering NSObject's have there own method for Allocating & Freeing memory?
Post: #2Graphic Ace Wrote:I'm creating a Text based struct
typedef struct theText {
NSString *text;
GLint a,b;
}textBase;
textBase *objText;
objText = malloc(sizeof(textBase));
will there be any problem's with doing this considering NSObject's have there own method for Allocating & Freeing memory?
In textBase, text is a pointer to an NSString. The allocated memory will be the size of a memory address, plus two GLints. So, to malloc it is quite right. However, when you call free, it will not release text.
I would suggest a simple solution:
Code:
static inline
textBase* createTextBaseRef() {
return (textBase*)malloc(sizeof(textBase));
}
static inline
void freeTextBase(textBase* ref) {
[ref->text free];
free(ref);
}(forgive my rusty pointer arithmetic - I've been using Ruby lately for work, and so I'm a little out of practice).
Post: #4FreakSoftware Wrote:Don't ever call ->free on an NSObject
Thanks. Obviously what I was trying to say (and failed miserably) was:
Code:
static inline
textBase* createTextBaseRef() {
return (textBase*)malloc(sizeof(textBase));
}
static inline
void freeTextBase(textBase* ref) {
[ref->text release];
free(ref);
}As Seth said, if you call free on an NSObject, you're in for some trouble. If you have to use free, then you probably aren't using the retain-release paradigm correctly anyways and so should spend some time with the memory management guide.
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