I am developing a gem, which is currently pure Ruby, but I have also been developing a faster C variant for one of the features. The feature is usable, but sometimes slow, in pure Ruby. The slownes...

I came across this code. typedef __mpz_struct MP_INT; typedef __mpz_struct mpz_t[1]; Here the struct __mpz_struct is a struct that is typedefed to an array of single element. I understand that t...

I'd like to organize the C source code like this: + / | |___ + ext | | | |___ + native_extension | | | |___ + lib | | | | | |___ (Source files are kept in here - may contain sub-folders) | | | |__...

I am looking for a function which can get me all the keys from hash or I can loop through the hash to retrieve single key at a time. Currently I am hardcoding key VALUE option = rb_hash_aref(op...

How does one handle Ruby 2.0.0 keyword arguments from a C extension? Background def example(name: 'Bob' hat_color: 'red') puts "#{name} has a #{hat_color} hat!" end example #=> "Bob has a re...

I'm trying to write a C extension to ruby that'll generate a class. I'm looking on how to define some default arguments to a class. For example, if I have this class decleration in ruby: class MyC...

I want to call ruby code from my own C code. In case an exception gets raised, I have to rb_protect the ruby code I call. rb_protect looks like this: VALUE rb_protect(VALUE (* proc) (VALUE), VALUE...

I've recently updated to Mountain Lion and re-installed Ruby, but when I try to run a test Rails app, I get an error message that says that "Rails is not currently installed" on my system. I do wha...

I am working on a C extension for ruby, but I need to include headers from the IOBluetooth framework, specifically: #import <IOBluetooth/objc/IOBluetoothDeviceInquiry.h> #import <IOBlueto...

I am trying to build a Ruby C Extensions that uses libcurl. So far I have built it sucessfully on Os X. However I am much less experienced developing in Windows and am not exactly sure how to go ab...

I have problems creating a ruby extension to export a C++ library I wrote to ruby under OSX. This simple example: #include <boost/regex.hpp> extern "C" void Init_bayeux() { boost::regex e...

I'm currently experimenting with creating my own gem in Ruby. The gem requires some static resources (say an icon in ICO format). Where do I put such resources within my gem directory tree and how ...

I'm writing a gem, that includes a C extension. Usually when I write a gem, I follow a process of TDD, where I'll write a failing spec and then work on the code until it passes, etc etc... With my...

Im writing a Ruby extension and Im using the function Data_wrap_struct. In order to participate in Ruby's mark-and-sweep garbage collection process, I need to define a routine to free my structure...

I'm writing a Ruby 1.9 C extension and I want to do the following in ruby: notifier = Notifier.new notifier.on 'click' do puts "clicked!" end Now the problem with this is that on the C method, ...

So, recently I had the unfortunate need to make a C extension for Ruby (because of performance). Since I was having problems with understanding VALUE (and still do), so I looked into the Ruby sourc...

I want to return several values from a C function, and IMHO, a hash is a good option. I first used rb_intern('A_KEY') to create the keys, but the extension crashed. Now, I am using rb_str_new2, but...

I'm writing a C extension, providing an interface between Ruby and an asynchronous I/O library. When running the tests over my code, I frequently get errors including (but not limited to): [BUG] c...

In ruby, begin # ... rescue # ... end won't catch exceptions that aren't subclasses of StandardError. In C, rb_rescue(x, Qnil, y, Qnil); VALUE x(void) { /* ... */ return Qnil; } VALUE y(void...

I'm writing a ruby extension that defines a class. If I use Data_Wrap_Struct() to implement my callback for rb_define_alloc_func(), do I need to manually mark and free the instance variables? Or is...