Please help me understand the following signature: err_type funcName(const Type& buffer) const; so for the first const, does that mean the contents of Type cannot change or that the reference cannot change? secondly, what does the second const mean? I don't really even have a hint. Thanks in advance, jbu ...
I've seen a couple programs running in Windows that could access the iPhone and iTouch with access to the photo library and music. What APIs are used for this kind of development? ...
I have a problem with boost shared_memory_object and mapped_region. I want to write a set of objects (structures) in the memory object. If the structure contains just a char, everything is ok; if I just add an int to the structure, then if I put too many objects (let's say 70, so much less than the limit of the block) I get a segmentatio...
How to deploy Qt+Boost Application on Mac OS X or Windows platform. I use Qt Creator + Qt 4.6 + MacOS 10.6 How to compile my application into release to run it on another computer w/o installed Qt libraries? ...
If the function pointer embedded in a boost::bind return object is NULL/nullptr/0, I need to take action other than calling it. How can I determine if the object contains a null function pointer? Addenda I don't believe I can use and compare boost::functions as the boost::bind return object is used with varying call signatures in a te...
I am trying to find dynamically and statically instantiated objects number. I am getting errors that variable myheap is not declared. #include<iostream.h> #include<stdlib.h> class A { public: static int x; //To count number of total objects. incremented in constructor static int myheap; //To count number of heap objects. Increm...
class test { private: class privateStruct { public: int m; privateStruct(int p){m=p;} }; }; void ff() { test::privateStruct ps(4); throw ps; //Does not work.. } void main() { try { ff(); } catch(...) { } } But the Following Code Works Why class test { private: ...
I have been trying to develop a peer to peer application that uses Micosoft's Peer to Peer Group library. Basing my work on the Creating a Group Chat Application acrticle on msdn. This works fine for local groups and will also work for global groups if I have a thrid party tunnel adapter installed such as the gogo6 client. However fro...
My IM application setup is like below: User Interface module (exe) Plugin module ( A polymorphic DLL that provides an abstract interface for different protocols to the UI module ) Several Protocol DLLs ( Shared library DLLs that implement the respective protocols, like Jabber, ICQ etc ) Now, I was asked to implement contact list cach...
May I know is there any C++ equivalent class, to Java java.util.concurrent.ArrayBlockingQueue http://download.java.net/jdk7/docs/api/java/util/concurrent/ArrayBlockingQueue.html ...
I have code that boils down to this: //Just a templated array class .. implementation doesn't matter template<int N> struct Array {}; //A simple Traits like class template<typename T> struct MyTraits {} //Specialization of the traits class template<int N> struct Foo< Array<N> > { static void monkey() {}; } int main() { Foo< Array...
hi , I've write a procedure which will store some data inside a structure and the I will pass the structure to other procedure like below slotUpdate(Datas); whereas I've defined the structure like : someNameSpace::stuData Datas; after passing the structure to slotUpdate again I'll pass it to another procedure but this time as a pa...
Hi, I have an application which uses C# front end and a C++ DLL as the backend. I am trying to pass an array from C# code to the C++ code in the DLL which changes the values in that array. But when I try to retrieve the values of the array from C# code after the call is made to the C++ DLL function, the changes are not being reflected. I...
What I need is actually a thread-safe queue structure, where multiple clients keep dumping data into the queue and one working thread keeps processing and popping the queue is there any well-established solution existing in STL or Boost? I now think about using Boost::threadpool to do this. Simply set the number of parallel threads to ...
I'd like some (freely reusable) C++ classes to represent states, events and Finite State Machines (FSM). Maybe each even has a unique ID and string name which can be used when debugging. Maybe each state has the same plus an OnEnter() and OnExit() function, etc and maybe each FSM has a collection of states, each of which accepts various...
hello, thanks for looking I've completed the FLTK chapter in Bjarne's new book but I'm trying to run a simple FLTK code and I'm getting this reference error error LNK2019: unresolved external symbol "public: __thiscall Fl_Widget::Fl_Widget(int,int,int,int,char const *)" (??0Fl_Widget@@QAE@HHHHPBD@Z) referenced in function "public: __thi...
Are there any libraries for inter-process communication (IPC) between a .NET application and a native C++ application? ...
Hi there. I have a small, simple program with menu and submenus. User choose from 1-9 and hits enter. I want the code to read ONLY numbers 1-9 removing "\n" from stdin. I've tried sth like this: #include <cstdio> #include <iostream> using std::cin; using std::cout; using std::endl; class cProgram { private: char W; public: ...
I'm trying to get the stack backtrace of a running process (PID and binary path are known) from another program. The program in question is written in C++ and compiled with g++ with gdb debugging symbols. I'm looking for a C or C++ library that works across Linux, HP-UX and Solaris that produces an output similar to the output of callin...
Dear all, I want to read from one file that has several kinds of data-types. I utilize ifstream (C++ language) but it can't read strings. In fact, I have written a code that has too many options and input parameters. Now, I want to read these parameters and (bool) options from an input file, then I can run my program by edition of inp...