[MacRuby-devel] [MacRuby] #479: Need GCD wrapper for Process Sources

[MacRuby]

#479: Need GCD wrapper for Process Sources
----------------------------------------+-----------------------------------
 Reporter:  ernest.prabhakar@…          |       Owner:  lsansonetti@…        
     Type:  defect                      |      Status:  new                  
 Priority:  blocker                     |   Milestone:  MacRuby 0.5          
Component:  MacRuby                     |    Keywords:                       
----------------------------------------+-----------------------------------
 We should wrap DISPATCH_SOURCE_TYPE_PROC

 http://developer.apple.com/mac/library/documentation/Darwin/Reference/ManPages/man3/dispatch_source_create.3.html

 proc_src = Dispatch::Source.for_process(queue, Process::Status, mask,
 &block)

 I think the only tricky part is defining a good set of constants for the
 mask:

             DISPATCH_PROC_EXIT    The process has exited and is available
 to wait(2).
             DISPATCH_PROC_FORK    The process has created one or more
 child processes.
             DISPATCH_PROC_EXEC    The process has become another
 executable image via a call to execve(2)
                                    or posix_spawn(2).
             DISPATCH_PROC_REAP    The process status has been collected by
 its parent process via wait(2).
             DISPATCH_PROC_SIGNAL  A signal was delivered to the process.

 So they can be easily extracted from the data passed to the handler:

      The data returned by dispatch_source_get_data() indicates which of
 the events in the mask were observed.

 For example, it may be worthwhile to create a
 Dispatch::Source::ProcessEvent class which is passed both as the original
 mask and as the data returned to the handler.

-- 
Ticket URL: <http://www.macruby.org/trac/ticket/479>
MacRuby <http://macruby.org/>