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.
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18 views
Why am I getting garbage characters in my output for Test 1 and Test3 occasionally? [migrated]
I am having problems with my Test cases writing garbage to my result variable, and I am pretty new to C, so I am having trouble determining what is causing it. Thanks
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0answers
17 views
Pass file lines to struct arrays [closed]
I'm trying to pass the elements of every file line into struct arrays. My program worked just fine before I implemented the while loop(I know less tasks), but now it crashes right away. Do I need to ...
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0answers
74 views
Custom checked_ptr (like std::shared_ptr) for projects without STL
I have written a class to encapsulate pointers for a platform, where the STL is not available. The idea is to have something similar to std::shared_ptr.
However, I ...
3
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0answers
42 views
A way to automatically reorder struct fields by their sizes in descending order
Using constexpr and preprocessor magic it is possible to cook a struct which have a minimal size between all possible sizes, keeping all the data members properly ...
3
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1answer
72 views
Simple C++ object pool
I am studying Computer Science and just for the sake of practise I thought of implementing an Object Pool.
This is my first implementation, it is simple and works correctly, but I would love any ...
2
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1answer
98 views
Writing order and move assignment when following the Rule of Five
I am a C++ newbie, and trying to figure out what the best practices are for writing the "Big Five" member functions, as prescribed by C++11's unofficial "Rule of Five".
My class with a raw pointer is:...
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0answers
63 views
18
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4answers
3k views
Implementing realloc in C
I have an assignment to implement realloc in C, This's my code please review it.
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6
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1answer
42 views
Locating the largest Collatz Sequence with memoization
Inspired by this question I wrote a memoized form of the collatz sequence calculator.
The idea was to cache the sequence lengths for as many sequences as possible, from 0 to some value. I managed to (...
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2answers
282 views
C++ String class
I made a string class to be used as a replacement for std::string. It has all the find functions (find, ...
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2answers
63 views
Definition of power functions
I needed to write a simple function that could raise a value x to the n'th power. I found out I could write this function in 2 ...
2
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1answer
36 views
Gem to interact with a third party API
I am writing a gem for users to interact with a third party api. I want users to have easy and natural access to objects and properties delivered by the JSON payload.
The collection of entities ...
11
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5answers
936 views
Zero-initializing large dynamically allocated arrays of double
Arrays of double can be zero-initialized with the { 0 } initializer, which works even on systems that have a binary ...
2
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2answers
76 views
Rule of five and move semantics for a string class
I have been learning about the rule of five and I tried to implement an example myself. It all works exactly as I'd expect, but I was wondering if I've missed any obvious issues or easier/faster ways ...
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2answers
81 views
Massive file sorting algorithm
I was trying to sort a massive file of successive chars in C. I did some research and found a few file sorting algorithms that look the same. Their main idea is to read an amount of data to memory, ...
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1answer
42 views
Using shared_ptr as class member [closed]
I have already got the answer for my previous question, and I decided to use std::vector<int> instead of int *. I have ...
1
vote
1answer
60 views
Template binary heap with lambda function comparator C++
This heap will be used for A* search pathfinding in my 2D isometric game engine. It uses lambda functions (instead of std::less or ...
6
votes
1answer
51 views
Counting sort implementation in C
I've just implemented counting sort in C and would like to hear your opinions on it. As I'm usually being rather picky when rating other people's code, please go ahead and be picky, too -- I will try ...
4
votes
1answer
56 views
Pool allocator in C
This is an allocator that is used in replace of malloc if you do a lot of rapid, but small allocations on the heap. I wrote this for reducing system calls to improve performance. It works, but I've ...
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votes
2answers
108 views
Memory issues when copying JPEG into bmp
I am trying as a part of a bigger job to merge parts of several JPEGs into one huge BMP which will be processed further.
As a start, I tried to just copy a few JPEGs each to his own BMP file. In ...
2
votes
1answer
53 views
Simple class to mimic a dynamic array
for my c++ class I was asked to write a class with the following characteristics:
Implement a vector replacement that operates only on integers (you don't need to use templates like the normal STL)...
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1answer
57 views
Templated double ended queue (deque) move semantics edge cases C++
My original deque implementation and efficiency question lacked move semantics. After ratchet freak provided an example of how to define them I decided to try adding them to my deque. The unit test + ...
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1answer
93 views
Template double ended queue (deque) implementation using dynamic allocation C++
I have written my own deque class to get a better grasp of C++ pointers and memory management. The following code is part of a larger 2D isometric game I am developing. It compiles and runs fine using ...
6
votes
1answer
104 views
Reference Counting in C99
(I created a GitHub repository; there are few improvements as suggested by other users in the comments)
As we know, C99 has no garbage collector. To address the problem of manually deallocate objects ...
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2answers
124 views
Perlin Noise Generator
I'm porting a 2-D Terrain Generator from Python to C++ as Python is too slow due to the number of features that have been added.
I'm new to C++ and would like to know of any criticisms that you can ...
3
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0answers
20 views
Extending Array to make a stack that bubbles unused objects up and active object down
Array.prototype.fastStack
To combat GC and its impact on animation I created Array.fastStack that adds to the array prototype.
It's a sort of stack that bubbles ...
2
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1answer
47 views
Dynamic Array Bags
For one of my assignments, we were asked to create a data structure similar to Bags using dynamic arrays where the order would be important - which I was able to do successfully, that is, the code ...
3
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1answer
51 views
Basic memory pool, alignment, thread safety
Mainly for practicing purposes, I'm trying to implement a simple, yet efficient memory pool. It's basically a linked list that is able to grow, with fixed sized members. Each node has a flag if it's ...
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1answer
42 views
Simple but (hopefully) safe C nodes for data structures
Nodes will be for simply linked lists, circular lists, maybe later on extending them to work with graphs. I'm trying to be as defensive as possible, will this leak memory? It runs perfectly I'm just ...
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0answers
145 views
A vector-like polymorphic container to store objects from a type hierarchy in contiguous memory
Normally, in order to have a polymorphic collection, we store pointers to a base class:
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1answer
48 views
Memory allocation tracking using anonymous lambda wrapper
I had this idea to exploit anonymous lambdas that are immediately executed that wrap around an allocation function to track those allocations in a statically created Stats object.
This is the code I ...
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1answer
98 views
Ensure that ICommand implementation properly uses weak references
I am building an implementation of System.Windows.Input.ICommand that is like the commonly used RelayCommand, but doesn't keep a ...
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0answers
26 views
Helper class for accessing blobs and mmap memory - follow up
This class was inspired from Microsoft's array_view.
It intended to use with mmap-ed memory for easily check bounds and so on.
I probably will need to throw exceptions, but this is not my usual way ...
2
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1answer
44 views
Helper class for accessing blobs and mmap memory
This class was inspired from Microsoft's array_view.
It intended to use with mmap-ed memory for easily check bounds and so on.
...
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2answers
69 views
Code for calculating number of trailing zeroes after factorial
While trying my hands at the beginner codechef problem I came across this . So basically doing that problem with Dynamic programming is an overkill but why not try that and get some DP practice.
Nice,...
6
votes
2answers
72 views
ObservingCache - scheduled task executor that returns a result
I wrote a utility class called ObservingCache, which receives a task in the form of Supplier<T> and an interval, computes the task every [interval] millis and ...
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2answers
68 views
A dynamic memory resource with alignment support
Although C11 introduced aligned_alloc( alignment, size ), there is no support for aligned reallocation (AFAIK). The ...
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2answers
91 views
Simple program to read memory usage by PID in Linux
I just learn a little bit about C Programming and try to create a modular program so I created simple program to read memory usage by pid(s) in Linux.
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1answer
273 views
Brute-force password cracker
I am trying to write a program to find a zip file's password. I know the password consists of only lower-case letters and it's length does not exceed 6 characters. I wanted to check the passwords of ...
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1answer
34 views
Split a file into individually allocated lines
This is part of a larger project that is to run on POSIX systems. My concerns with it are the lack of comments, best practices with the filesystem, and naming things. Of course all feedback is great.
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0answers
35 views
Round-tripping from LinkedHashMaps to Clojure collections
I'm trying to implement round-tripping from LinkedHashMaps to Clojure collections. The implementation below works for smaller collections, but larger collections raise ...
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3answers
248 views
Structure to ByteArray Extension
I have a need to turn various structures into byte arrays to be sent over serial port to another machine. I created generic extensions to turn any structure into a byte array and from a byte array ...
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2answers
2k views
Taking arbitrary length input in C
Instead of having to use something like char buf[100500] and hope that no possible user input could be longer than 100500 bytes, I decided to make the following ...
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0answers
53 views
cross-platform stdlib-only aligned allocator in C++14
I'm writing a program which uses OpenCL, and the OpenCL types are mostly over-aligned. Sometimes when using stl containers with these types, I'd get segfaults, so I tried to write my own aligned ...
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2answers
87 views
NamedPoint class using unique_ptr for members
After reading this old article from 2001 I have tried to implement the class from it using unique_pointer.
An author's claim is that C++ is not appropriate for ...
4
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1answer
153 views
New malloc implementation
I've written a new malloc implementation similar to dlmalloc and was hoping for feedback on it.
The goals for this library are:
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1answer
68 views
Serial communuication application of 24*7 having memory issue
I am having a serial port communication application using 3 serial ports DMX (m_port,m_port1,m_port2) which will run 24 *7 , so i just need to ensure memory usage doesn't go above limit with using(), ...
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5answers
501 views
Custom list to avoid out of memory exceptions
The following class is a helper to avoid OutOfMemoryException exceptions being thrown when the list is to large so that it is added onto the large objects heap. To ...
11
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0answers
173 views
Aligning your heterogenous uninitialized memory to make the processor happy
After learning more about memory alignment and how it can impact processor data access, I tried to find something in the standard that offers proper memory alignment inside blocks of raw memory that ...
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0answers
92 views
Low performance of HTTP request using Haskell wreq
The program makes HTTP requests (checks video stream status) and calls an external program.
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