For a class hierarchy like: struct base { int i = 1; }; struct derived final : public base { int j = 2; void f() { i = 2; } }; // more derivations from base I’d like a way to create an instance of derived but using an existing base instance. For example: ..
Category : allocation
Could anyone tell me please how can I find out size of an allocation that went wrong (in my case it is a bad allocation). I’m working with Windows application (exe file). Thank you. Source: Windows..
This is a question about static memory in C and C++ environments. Put simply I am interested to know what kinds of (static) memory allocation consume stack space. There are two things that initially come to mind: double x; If I understand correctly, this does not consume stack space. It will be compiled to something ..
I have: class image { public: linked_list<int, int> UnLabeledList; explicit image(int Segments) {//some code} }; Where the C’tor of linked list is: linked_list() { total_nodes = 0; first = new node<S, T>{}; //Dummy first->height = NOT_INIT; last = first; } How can I detect if this line fails? linked_list<int, int> UnLabeledList; it’s outside any function ..
I wrote: class image { public: linked_list<int, int> UnLabeledList; int *SegArray = nullptr; int Total_Segments = 0; explicit image(int Segments) : SegArray(new int[Segments]) { Total_Segments = Segments; for (int i = 0; i < Segments; ++i) { if (!UnLabeledList.push_back(i, NOT_INIT)) { // allocation failed for one node (Doesn’t throw any exception) ~UnLabeledList(); delete[] SegArray; throw; ..
I am trying to implement my own linked list, and had confusion with few things. Here is part of my current implementation: /** Copy Constructor – Uninitialized Object**/ linked_list(const linked_list &l_list) { total_nodes = 0; first = new node<S, T>{}; //Dummy first->height = NOT_INIT; //For debugging last = first; node<S, T> *tmp = l_list.first->right_node; while ..
The below code is using a handler that provides a custom allocator. The allocator is provided with an instance of BucketPool that can allocate different sizes, but the sizes of the allocations that can be made needs to be specified at compile time. So to use BucketPool I would just specify some arbitrary template parameter, ..
I am trying to learn how to use boost::asio together with custom allocators. In the below example I scheduele a timer to be fired on a strand, and the handler is allocated using a custom allocator. For this I have used this example:. But even if I specify a custom allocator there is a call ..
I am porting some code from a POSIX-based runtime which implements resizable memory segments. The POSIX code uses mmap to map the segment (the maximum size the segment can grow to) and mprotect to shrink or grow the usable portion of the segment. I need to be able to replicate this on Windows. It seems ..
// c++ class inheritance #include<iostream> using namespace std; class A { public: int x; }; class B: public A { }; int main() { B b; b.x=5; cout<<b.x<<endl; return 0; } Does a Derived Class allocate memory for the inherited variable, or it just gets access to it from the Base Class?? Source: Windows Questions ..
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