Hi, I'm trying to plug tcmalloc into a suite of software that we currently use at work. The software comprises of a lot of dll's. They all refer to a shared header file, so I can pragma link the library. However as none of the code refers to the symbol __tcmalloc the optimizer strips the dll. Now I don't want to have to edit 200 projec...
hi guys, i'm trying to pass a string from main to another function. this string is a name of text file that needs to be oepened. as far as i can see, i am passing the string alright, but when i try to use ifstream.open(textFileName), it doesn't quite work. but when i manually hardcode it as ifstream.open("foo.txt"), it works just fine. i...
I'm currently working through some exercises in a c++ book, which uses text based games as its teaching tool. The exercise I am stuck on involves getting the pc to select a word from a const array of words (strings), mixing the letters up and asking the player to guess the word. This was easy, but as a follow on the book asks to add the ...
I am getting to know boost::variant. I think this example should work. #include <boost/fusion/sequence.hpp> #include <boost/fusion/include/sequence.hpp> #include <boost/variant/variant.hpp> #include <string> #include <vector> #include <iostream> #include <boost/variant/get.hpp> boost::variant< bool,long,double,std::string, std::vector<...
While I have played with parts of Qt in the past I am thinking of putting some real effort into learning it but also wondering what the potential monetary payback might be down the road. So I have some general questions about Qt's future. What is Qt's place in the job market? Are there many, or do you sense a growing number of install...
Hello, I have following piece of code: It compiles without problems under gcc-3.4, gcc-4.3, intel compiler, but fails under MSVC9. MSVC tells "use of undefined type c_traits<C>, while compiling class template member function void foo<C>::go(void) with C=short. The point it the compiler tries to install unused member function of unuse...
Given 2 functions, which should be faster, if there is any difference at all? Assume that the input data is very large void iterate1(const char* pIn, int Size) { for ( int offset = 0; offset < Size; ++offset ) { doSomething( pIn[offset] ); } } vs void iterate2(const char* pIn, int Size) { const char* pEnd = pIn+Siz...
It compiles fine, but when it runs, it adds random high numbers to the list, as well as duplicates of existing numbers. I've had a couple of people look over this, and none of them can figure it out. void mergeSort(int list[], int length) { recMergeSort(list, 0, length - 1); } void recMergeSort(int list[], int first, int last) { ...
For some reason I get some warnings about "non dll-interface class" when building with a release configuration, but not debug. I've compared the release and debug configurations, and my ones with the MySQL++ example ones, however I cant see which setting is causing these warnings. 1>c:\sql\mysql 5.0\mysql++-3.0.9\lib\qparms.h(49) : war...
In C++ I have a reference to an object that wants to point back to its owner, but I can't set the pointer during the containing class' construction because its not done constructing. So I'm trying to do something like this: class A { public: A() : b(this) {} private: B b; }; class B { public: B(A* _a) : a(_a) ...
I'm using gcc 4.3.2. I have the following code (simplified): #include <cstdlib> template<int SIZE> class Buffer { public: explicit Buffer(const char *p = NULL) {} explicit Buffer(const Buffer &other); const char *c_str() const { return m_buffer; } private: char m_buffer[SIZE]; }; typedef Buffer<10> A; typedef Buffer...
Is boost::object_pool synchronized? ...
Suppose I have an object that has a member variable that is of some template type. So, in the declaration of the class, there would be something like this: // This is just the declaration of bar which is a member of some class. templatizedType<Foo> bar; Now, when I want to initialize bar why do I have to do // This is the initializa...
This is a question out of curiousity for java or c++, I wanted to ask if it is possible to turn any text input into some executable statements? For example say I have a text file with info like: "class: Abc, Param: 32" Now say in C++ or Java I want to read that file and do something like: new Abc(32); How would I do that? Its easy...
Hi, I'm trying really hard to made this work, but I'm having no luck. I'm sure there is a work around, but I haven't run across it yet. Alright, let's see if I can describe the problem and the needs simply enough: I have a RGB template class that can take typenames as one of its template parameters. It takes the typename and sends it...
Hi, In an .h file, I am declaring a global variable as: #pragma data_seg(".shared") #ifndef DEF_VARX #define DEF_VARX int VARX=0; #endif /*DEF_VARX*/ #pragma data_seg() #pragma comment(linker, "/SECTION:.shared,RWS") However if I include this file in multiple cpp files, when I try to compile, I get " error LNK2005: "int VARX" (?VARX@...
I am beginning to write a translator program which will translate a string of text found on a file using parallel arrays. The language to translate is pig Latin. I created a text file to use as a pig latin to English dictionary. I didn't want to use any two dimension arrays; I want to keep the arrays in one dimension. Basically I want to...
Hi I want to achieve to download a file in a separate thread and store that file, but I was not able to find an appropriate way to achieve this without evil delay (quite frequent download of small files, so signal+slots are too slow). What I want to achieve: (Pseudo Code) request file; wait for download finishing, timeout or error; save...
When I type this line of code: QString newPath = QFileDialog::GetOpenFileName(this, tr("Open Image"), path, tr("Image files (%1)").arg(formats.join(" "))); I typically format it like this: QString newPath = QFileDialog::GetOpenFileName(this, tr("Open Image"), ...
Hi, I try to declare a shared data segment in a DLL. I declare the area with: #pragma data_seg(".shared") int varx=0; #pragma data_seg() __declspec(allocate(".shared")) // I found this declspec suggestion in another forum #pragma comment (linker,"/section:.shared,RWS") Also I add SECTIONS .shared READ WRITE SHARED into the...