Questions tagged [memory-management]
Memory management is the act of managing computer memory by allocating portions of memory to programs as well as freeing memory so that it can be re-used.
635
questions
1
vote
1
answer
2k
views
Will this code get cleaned up by the garbage collector?
I have been working on a Backbone.js application, and I am starting to think I am making a huge mistake.
I never fully understand garbage collecting, and how exactly some closures prevent it. I just ...
- 294
3
votes
1
answer
2k
views
Java: Find the smallest integer not in the list - Memory Efficiency
This is a fairly popular interview question that I conceptually understand but have never really attempted to implement. In other similar implementations of this in Java I have seen they typically ...
- 188
5
votes
2
answers
8k
views
Min Heap implementation with Dijkstra's algorithm
I am implementing Dijkstra's Algorithm using Min Heap to speed up the code.
For a small number of nodes, the code is really running very fast. But for a large number of nodes, my code is throwing ...
- 429
1
vote
1
answer
1k
views
Free memory outside function
Is this going to leak memory or is it ok? Please also let me know if there is something else that I need to pay attention to.
...
Dev Bag
1
vote
1
answer
255
views
Variable sized type allocation
I have a type that receives serial data over a pipe:
struct Packet : Base { // Base is POD, too
int foo;
char data[];
};
In the context, where I instantiate <...
- 175
4
votes
1
answer
381
views
Is this a valid usage of structure assignment in C?
Q: Please comment on the usage of structures and structure assignment operations in C
I am working on converting a MATLAB program to C using BLAS and LAPACK for linear algebra support. The MATLAB ...
- 43
3
votes
2
answers
2k
views
Read until EOF and realloc as needed
This is a function that reads until EOF and reallocs as it goes.
...
- 31
3
votes
2
answers
3k
views
Tree Node class - deallocation in the destructor
Is my destructor correct? Does it properly deallocate the subtrees?
...
5
votes
1
answer
1k
views
Simple TCP client - memory issues
Does this snippet take too much memory? How can I let the connection opened with the function connectTo outside the forever loop?
...
- 153
2
votes
1
answer
326
views
Am I using my data source array correctly?
When I want to make some quick tests for my UITableViewControllers, I usually create an NSArray that holds some dummy data. I would like to know if I'm doing anything wrong here:
First in ...
- 155
3
votes
1
answer
3k
views
Space to allocate before sprintf
I just finished chasing a Heisenbug that was entirely my fault. I'd like to avoid it happening again.
I have a function which formats a date to a certain preset format. Turns out I was not allocating ...
- 806
5
votes
2
answers
930
views
Human (imperfect) array (card) shuffle written in C
I've got this humanoid_shuffle I wrote in Python. I've been wanting to learn C so as an exercise I ported it to C. As this is my first venture into C and even the ...
- 309
3
votes
1
answer
909
views
Memory leak in a scraper [closed]
This is a scraper written in CoffeeScript for NodeJS. It is run in an interval (set to 5 seconds here to dramtically show the leak). Somewhere this code leaks memory. I already tried nulling a few ...
- 139
7
votes
1
answer
707
views
Memory issues with Find Strings Problem on InterviewStreet
Here is the code I wrote for the problem at http://www.interviewstreet.com/recruit/challenges/solve/view/4e1491425cf10/4efa210eb70ac where we need to to print the substring at a particular index from ...
- 205
6
votes
1
answer
296
views
Is this a good algorithm for 2D collision, or will it allocate too much memory?
I have a Rectangle class, of which I have 5-6 vectors for each instance. The main vectors are the center and color of the object, while the secondary vectors represent more or less the north, south, ...
- 179
4
votes
3
answers
779
views
Simple, lightweight deterministic "garbage collection"
I am toying with a simple class to inherit from to manage my dynamic resources. I am fairly new to C++, so my "implementation" might be suboptimal. Suggestions how to improve functionality are welcome....
- 161
3
votes
1
answer
181
views
Am I managing my memory correctly?
I read that if an object is made using the init it must be released, but if it's something like this ...
- 361
6
votes
3
answers
835
views
App for allowing the user to type in chemistry formulas using a custom keyboard
Essentially, I am making an app that allows the user to type in chemistry formulas using a custom keyboard.
The keyboard will have several keys, for example, "Na", "H", and "O". Pressing them in ...
- 361
9
votes
1
answer
4k
views
Super simple templated memory pool in C++
I have a small program where I have a background thread that plays sound, so it needs to run really fast, but it also needs to do a small amount of memory management. I didn't want to use normal new ...
- 463
2
votes
1
answer
495
views
Runge-Kutta 2nd order of differential equations
Could I improve this somehow (not numerically, just C-wise)? Do I need to allocate the array since I am returning it and not just using it inside the function?
...
Smith Johnson
11
votes
3
answers
2k
views
Reusing strings read from I/O
I am working on an application that reads lots of data from the network and puts it in a grid. I noticed that I could save some memory by reusing existing strings instead of always using the new ...
- 213
4
votes
2
answers
213
views
Array initialization from text string
I have a block of text where several arrays are printed out, with a name and values:
VAL1=10 20 30 40 50
VAL2=4 8 15 16 23 42
I have a function that looks for the value name, and sets an array of ...
- 806
7
votes
1
answer
730
views
Double-Ended Queue - Have I over-engineered it again?
I'm working on an implementation of the Double-Ended Queue as a Doubly-Linked List (for personal enrichment), and I was wondering if anyone minded taking a look at my Constructor/Destructor and Empty ...
- 221
3
votes
1
answer
337
views
My program spikes from 100,000K mem to 1,000,000K mem in a matter of minutes in my program in VB.net [closed]
I've created a program that uses System.Graphics to render a simple (small) 2D scene to the screen. The problem is, for some reason, it starts to quickly ...
- 141
1
vote
2
answers
334
views
NSAutoreleasePool with Json Data
Just need to know if I'm doing something wrong in this code. my app seem work fast now with this code. I just want to if i really understant that
...
user627441
5
votes
1
answer
304
views
Overloading the new operator
This may be a naive question, but what are the dangers of the following code (allocate more memory in the new operator for the info struct)?
...
- 59
3
votes
1
answer
1k
views
Does this I/O operation caused a memory leak [closed]
My colleague did some code Optimise work.
Code below is from a public method of a public class (NOT STATIC CLASS OR METHOD)
code before:
...
- 187
3
votes
1
answer
2k
views
Memory leaks in lottery simulator
I'm primarily a C++/Java programmer, but I've recently started using Python at work and decided to write a Lottery Simulator at home. I wrote it to test out different combinations of lottery numbers ...
- 49
8
votes
2
answers
2k
views
BitTorrent peer protocol messages
I'm writing a BitTorrent client. Part of the protocol is an exchange of length-prefixed messages between peers. The forms of these messages are described in the official specification and also in the ...
2
votes
1
answer
603
views
Memory Question
Can this part of a view controller subclass be checked for memory leaks. I am not that good at finding leaks. I need this class to be able to be loaded many time over without it crashing due to memory ...
3
votes
0
answers
1k
views
Integrating SFML and Box2D lib, and a Mass Production Shape Factory [closed]
I've just written two new headers: one that integrates Box2D and SFML by a class called BodyRep which creates/ is a graphic representation of any body, and one that ...
- 297
8
votes
1
answer
568
views
Use of external memory or a custom allocator
I'm creating a class which uses a custom buffer. I want to offer the possibility to pass an external memory address (for higher interoperability between languages) or (for convenience) to specify a ...
- 300
4
votes
2
answers
3k
views
Allocating memory for a matrix with a single malloc
For an interview, I was asked to write code allocate memory for a rows*cols matrix, using a single malloc(). I want your comments about this code that I wrote:
<...
- 339
2
votes
2
answers
2k
views
Subclassing UIButton
I need to subclass UIButton, however the design of UIButton makes this really painful. This is because to create a button you ...
- 133