Questions tagged [alloc]
207 questions
2
votes
4 answers
iPhone Autoreleasepool and allocations
I've been reading about autoreleasepool but there is a point which is a bit unclear to me. I have some functionality using threads that required seperate memory managment using autoreleasepool.
In the following example is correct
-(void)…
teo
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2
votes
1 answer
c++ class library dynamic runtime allocation
Suppose I' have an interface class
class foo_if_t {
};
, a first library libfoo_orig.so with class foo_t which inherits from foo_if_t and has the following code:
#include "foo_if.h"
class foo_t : public foo_if_t{
private:
int res;
public:
…
Riccardo Manfrin
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2
votes
1 answer
Calling singleton object initiated from nib
I have an object which is initiated in my nib file. I want it to be a singleton but also accessible from code through [myClass sharedInstance];. Right now I have this:
static myClass *singleton = nil;
@implementation myClass
+ (myClass…
Jane
- 51
- 5
2
votes
1 answer
memory error in node JS (node::smalloc::Alloc)
I'm new to node Js, I've build a really simple server that send me back a zip file I request. It's all working but after some request a crash occur and i visualize this message on the terminal :
FATAL ERROR: node::smalloc::Alloc(v8::Handle, size_t,…
Alberto Scampini
- 798
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- 27
2
votes
1 answer
C, realloc that fails if the allocation cannot grow IN PLACE
Is there a way to grow an array in C, but only if the memory can be grown in place (That is, fail to grow if the pointer needs to be changed)?
Exodist
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2
votes
1 answer
When initialize a pointer?
Generally what I have to do? I should always initialize ptr?
char *ptr;
ptr = malloc (10);
OR
char *ptr = NULL ;
ptr = malloc (10);
And in a function?
void func(char **ptr)
{
*ptr = malloc(10);
}
int main()
{
char *ptr; /* OR char *ptr…
synth
- 65
- 5
2
votes
2 answers
Singleton Implementation. Blocking the alloc and init methods for external usage
I have a Class that I wish to implement as Singleton.
I wish that the only way an Instance of this class may be created / accessed is via:
+(MYClass*)sharedInstance
method. alloc and init are called within the method implementation (of course).
Is…
Ohad Regev
- 5,641
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2
votes
2 answers
Are objects in Objective-C ever created on the stack?
As far as I understand, in C++ you can create objects on the stack:
SomeClass object = SomeClass();
or on the heap:
SomeClass *object = new SomeClass();
In Objective-C you always seem to create objects on the heap, as [SomeClass alloc] returns a…
Jawap
- 2,463
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2
votes
1 answer
What is the purpose of LIFO memory allocation with an array in c?
#define ALLOCSIZE 10000 /* size of available space */
static char allocbuf[ALLOCSIZE]; /* storage for alloc */
static char *allocp = allocbuf; /* next free position */
char *alloc(int n) /* return pointer to n characters */
{
if…
occamsrazor
- 105
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2
votes
1 answer
Why Class produces warning and Class not, when using with alloc, init
I have two pices of code:
for(Class tmpClass in config->ctxStorageClasses){
id stor = [[[tmpClass alloc] init] autorelease];
}
and
for(Class tmpClass in config->ctxStorageClasses){
id…
The Tosters
- 417
- 3
- 15
2
votes
1 answer
Allocating memory in Erlang C NIF
Why would one use
void *enif_alloc_resource(ErlNifResourceType* type, unsigned size)
as opposed to
void *enif_alloc(size_t size)
when trying to allocate memory from an Erlang C NIF?
Reference does not specify much as to…
BAR
- 15,909
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2
votes
0 answers
I get an EXC_BAD_ACCESS when creating UIManagedDocument
I am creating UIManagedDocument and I don't know why I get the error saying:
Thread 1: EXC_BAD_ACCES code=1 address=0xdeadbeef
The only thing in my code is the creation of this UIManagedDocument. This function is called in viewDidLoad:
-…
Martin Verdejo
- 1,229
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2
votes
2 answers
unsigned char alloc and free issue
I'm confused about one strange thing....I have an unsigned char array.... I allocate it using calloc and record some bytes data in it... but when I free this unsigned char and allocate it again, I see that it reserves the same address in memory…
Garnik
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2
votes
1 answer
Under ARC, is there any difference between [[X alloc] initWith..] and [X xWith…]?
Take for example NSMutableArray:
NSMutableArray* a1 = [[NSMutableArray alloc] initWithCapacity:10];
NSMutableArray* a2 = [NSMutableArray arrayWithCapacity:10];
Under manual reference counting, the second line returned an autoreleased object. Now…
CodeSmile
- 64,284
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2
votes
2 answers
Objective C typedef Enum memory management
Do I have to take care of memory when I deal with the enum ?
This is where I declared my enum type. It is in another .h file
This is where I attempt to declare variable
After that Do I have o do something like that
// This is where I declared my…
ahmet yalaza
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