Hello, Has anybody used SmallObjectAllocator from Modern C++ Design by Andrei Alexandrescu in a big project? I want to implement this allocator but I need some opinions about it before using it in my project. I made some tests and it seems very fast, but the tests were made in a small test environment. I want to know how fast it is whe...
This is really starting to confuse the hell out of me. When do I use them, when don't I? For example I was reading a .cpp on linked lists whose class declaration was: struct CarPart { long PartNumber; char Partname[40]; double UnitPrice; CarPart *next; }; class ListOfParts { int size; public: CarPart *head; ...
Hi everyone there, can anybody tell me how to make file descriptors behave like atm nodes in /dev directory. Since i dnt have atm switch to test my program, i have to test with normal files, is there any method to make special type of file descriptors that behave like atm nodes. ...
I have a Visual Studio 2010 .NET 4 solution with C# projects and a C++/CLI project. I use Visual Studio's built in unit tests and code coverage. Other than the fact that Visual Studio 2010 coverage tool for C++/CLI projects seems to be much weaker than Visual Studio 2008 coverage tool, I get weird results. For example, I get uncovered...
I have checked in buid directory and have not found makefile there. How does Visual Studio 2008 buid the project? Does it use makefile? ...
Do I have to set up my gl context in a certain way to bind textures. I'm following a tutorial. I start by doing: #define checkImageWidth 64 #define checkImageHeight 64 static GLubyte checkImage[checkImageHeight][checkImageWidth][4]; static GLuint texName; void makeCheckImage(void) { int i, j, c; for (i = 0; i < checkImageHeig...
template<typename T> T* Push(T* ptr); template<typename T> T* Push(T& ref); template<typename T, typename T1> T* Push(T1&& ref); I have int i = 0; Push<int>(i); But the compiler calls it ambiguous. How is that ambiguous? The second function is clearly the preferred match since it's more specia...
I found this vector template class implementation, but it doesn't compile on XCode. Header file: // File: myvector.h #ifndef _myvector_h #define _myvector_h template <typename ElemType> class MyVector { public: MyVector(); ~MyVector(); int size(); void add(ElemType s); ElemType getAt(int index); private: ElemType *arr; int numUs...
Delete every 't'th (t>1) node of a single linked list. In the resultant linked list, again delete 't'th node. Repeat this till only t-1 nodes remains. For this i have come up with: Traverse until you reach 't'th node, delete all the nodes till the end. Is there any efficient way other than this?. Can any one please help me out. Thanks. ...
I want to learn how to draw shapes with wxWidgets. Where do I start? In case there are multiple ways, I prefer ease of use over cross-platform compatibility. I'm a Windows user. ...
I have found a very prejudicial fact about stl maps. For some reason I cant get objects being inserted in the map to get constructed/destructed only once. Example: struct MyObject{ MyObject(){ cout << "constructor" << endl; } ~MyObject(){ cout << "destructor" << endl; } }; int main() { std::map<int, ...
I have a TCP client connecting to my server which is sending raw data packets. How, using Boost.Asio, can I get the "whole" packet every time (asynchronously, of course)? Assume these packets can be any size up to the full size of my memory. Basically, I want to avoid creating a statically sized buffer. ...
I'm trying to generate textures like so: #define checkImageWidth 64 #define checkImageHeight 64 static GLubyte checkImage[checkImageHeight][checkImageWidth][4]; static GLubyte otherImage[checkImageHeight][checkImageWidth][4]; static GLuint texName[2]; void makeCheckImages(void) { int i, j, c; for (i = 0; i < checkImageHeight;...
Sorry if this question has been asked before. On my search through SO I didn't find one that asked what I wanted to know. Basically, when I have this: typedef struct node { int data; node *node; } *head; and do node *newItem = new node; I am under the impression that I am declaring and reserving space, but not defining, a p...
Greetings, I need to multiply two extremely long integer values stored in a text file (exported via GMP (MPIR, to be exact), so they can be any in any base). Now, I would usually just import these integers via the mpz_inp_str() function and perform the multiplication in RAM, however, these values are so long that I can't really load the...
I was reading that memcpy takes the number of bytes from a source location and adds it to a destination location. Does this mean that memcpy could possibly change datatype entirely ?? memcpy(DoubleOne, CharTwo, strlen(CharTwo)); considering that both values are empty still. ...
Greetings, my program exits with the code 3. No error messages, no exceptions, and the exit is not initiated by my code. The problem occurs when I am trying to read extremely long integer values from a text file (the text file is present and correctly opened, with successful prior reading). I am using very large amounts of memory (...
Just a general c++ curiosity: This code below shouldn't compile because it's impossible to know which to instantiate: temp(const int&) or temp(const string&) when calling func(temp) - this part i know. What i would like to know is if there is anything i can do to the line marked PASSINGLINE to get the compiler to deduce that i want ...
Hi! This was a question in our old C++ exam. This code is driving me crazy, could anyone explain what it does and - especially - why? int arr[3]={10,20,30}; int *arrp = new int; (*(arr+1)+=3)+=5; (arrp=&arr[0])++; std::cout<<*arrp; ...
Using c++ in visual studio 2008. How can I render d3d content as a directshow source filter. Matt ...