C++ Tips

m-categories meta__item">C++ Tips, Geek Speak, Rants

Today I discovered that C++ scoped static initialisation (function level) in Visual Studio is not done in a thread safe manner. It’s the kind of thing that I should have already known but I guess I assumed that since namespace level static initialisation was safe so was function level static initialisation. Unfortunately it’s not. If you read the MSDN documentation in a particular way you could decide that the docs say that it’s not; but it’s imprecise and unclear and I doubt that I did read the MSDN documentation anyway.

It seems that `isprint() is broken. The following program demonstrates the problem. In VS20013 it prints “test failed” in all previous versions of visual studio it prints “test passed”. From this reference: http://en.cppreference.com/w/cpp/string/byte/isprint it seems that VS2013 is broken. I’ve opened a Microsoft Connect issue for this. #include <ctype.h> #include <iostream> int main() { int c = 9; if (isprint(c)) { std::cout << "test failed" << std::endl; } else { std::cout << "test passed" << std::endl; } return 1; }

1/2 »