<P>FLTK supports multithreaded application using a locking mechanism based on "pthreads". We do not provide a threading interface as part of the library. However a simple example how threads can be implemented for all supported platforms can be found in <tt>test/threads.h</tt> and <tt>test/threads.cxx</tt>.
<P>To use the locking mechanism, FLTK must be compiled with <tt>--enable-threads</tt> set during the <tt>configure</tt> process. IDE-based versions of FLTK are automatically compiled with locking enabled if possible.
<P>In <TT>main()</TT>, call <ahref="Fl.html#Fl.lock"><TT>Fl::lock()</TT></A> before <AHREF="Fl.html#Fl.run"><TT>Fl::run()</TT></A> or <AHREF="Fl.html#Fl.wait"><TT>Fl::wait()</TT></A> to start the runtime multithreading support for your program. All callbacks and derived functions like <tt>handle()</tt> and <tt>draw()</tt> will now be properly locked:</P>
<p>These messages can be read by the main thread using <AHREF="Fl.html#Fl.thread_message"><TT>Fl::thread_message()</TT></A> or by registering a message callback with <AHREF="Fl.html#Fl.set_awake_cb"><TT>Fl::set_awake_cb()</TT></A>:</p>
<li>The <tt>make_current()</tt> method may or may not work well for regular windows, but should always work for <tt>Fl_GL_Window</tt>s to allow for high speed rendering on graphics cards with multiple pipelines</li>
