portability

Apperantly, GetThreadId is a Vista API. How can I get a thread's id on pre vista systems? Reed Copsey There are a few options: When you call CreateThread , you get the handle back. You can call GetCurrentThreadId to get the current thread's ID. You can use Thread32First / Thread32Next to enumerate threads. If you can somehow make the thread in question call GetCurrentThreadId and store it somewhere, you could read the result. If the thread in question enters an alertable wait state frequently, you could send it an APC with QueueUserAPC ; the APC handler can then call GetCurrentThreadId and

I need to generate a controlled sequence of pseudo-random numbers, given an initial integer parameter. For that I'm using the standard Java Random class, seeded by an integer parameter. I'd like to make sure that I will generate the same sequence across systems (Operating system, but also Java/JDK version), in the foreseeable future (and more!). In summary: Does Java ensure the reproducibility / portability of it's pseudo-random number generator across implementation and versions ? Note: I've asked the exact same question for Python . I since changed the implementation language to Java but for

How does one get the current user in a portable way? This seems like an FAQ but perlport doesn't speak about it, maybe because some odd systems don't have the concept of "user" to being with? However, let's stick to *nix and Windows. getpwuid($>) is not implemented on Windows. $ENV{USER} || $ENV{USERNAME} seems finicky. http://search.cpan.org didn't turn up much. getlogin : This implements the C library function of the same name, which on most systems returns the current login from /etc/utmp, if any. If null, use "getpwuid". $login = getlogin || getpwuid($<) || "Kilroy"; Do not consider

I'm developing an application for Android, and I'm thinking that it's functionality might be useful on other (Java-running) platforms (say a regular desktop app -- although I hope that the other platform(s) involved are immaterial to the question at hand). It's unlikely that the UI will be in any way portable (there's just too much of a difference between a good touch-capable, 4in screen UI, and a mouse-and-keyboard 19in screen UI), so I'm happy enough reimplementing that separately. However, the core "business logic" (ugh, horrid word) and model (data storage) classes could, in theory, be

This question already has an answer here: Consistent pseudo-random numbers across platforms 6 answers The title says it all, I am looking for something preferably stand-alone because I don't want to add more libraries. Performance should be good since I need it in a tight high-performance loop. I guess that will come at a cost of the degree of randomness. Any particular pseudo-random number generation algorithm will behave like this. The problem with rand is that it's not specified how it is implemented. Different implementations will behave in different ways and even have varying qualities.

C11 introduces the _Thread_local storage class specifier that can be used in combination with the static and extern storage class specifiers to declare a variable as thread local. The GNU C compiler suite implements a storage class specifier __thread with the same same semantics. Unfortunately I did not find any compiler (I tried gcc, clang and SUN studio) that actually implements the _Thread_local keywords. I currently use the following construct to declare a keyword thread_local : /* gcc doesn't know _Thread_local from C11 yet */ #ifdef __GNUC__ # define thread_local __thread #elif __STDC

I have recently discovered an annoying problem in some large program i am developing; i would like to understand how to fix it in a best way. I cut the code down to the following minimal example. #include <iostream> using std::cin; using std::cout; class MagicNumbers { public: static const int BIG = 100; static const int SMALL = 10; }; int main() { int choice; cout << "How much stuff do you want?\n"; cin >> choice; int stuff = (choice < 20) ? MagicNumbers::SMALL : MagicNumbers::BIG; // PROBLEM! cout << "You got " << stuff << "\n"; return 0; } I get link errors in gcc 4.1.2 when compiling with