January 2010 - MacRuby-devel - lists.macosforge.org

[MacRuby] #479: Need GCD wrapper for Process Sources
by MacRuby 13 Jan '10

13 Jan '10

#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/ManPa… 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/>

1 4

[MacRuby] #483: Need GCD wrapper for File (Vnode) Sources
by MacRuby 13 Jan '10

13 Jan '10

#483: Need GCD wrapper for File (Vnode) Sources ----------------------------------------+----------------------------------- Reporter: ernest.prabhakar@… | Owner: lsansonetti@… Type: enhancement | Status: new Priority: blocker | Milestone: MacRuby 0.5 Component: MacRuby | Keywords: ----------------------------------------+----------------------------------- We should wrap DISPATCH_SOURCE_TYPE_VNODE http://developer.apple.com/mac/library/documentation/Darwin/Reference/ManPa… file_source = Dispatch::Source.for_file(queue, io, mask, &block) As with PROC, the key is coming up with the right "bitfield" class to represent the event types: o DISPATCH_VNODE_DELETE The referenced node was removed from the filesystem namespace via unlink(2). o DISPATCH_VNODE_WRITE A write to the referenced file occurred o DISPATCH_VNODE_EXTEND The referenced file was extended o DISPATCH_VNODE_ATTRIB The metadata attributes of the referenced node have changed o DISPATCH_VNODE_LINK The link count on the referenced node has changed o DISPATCH_VNODE_RENAME The referenced node was renamed o DISPATCH_VNODE_REVOKE Access to the referenced node was revoked via revoke(2) or the underlying fileystem was unmounted. e.g.,: Dispatch::Source::FileEvent.new(:delete, :write, :extend, :attrib, :link, :rename, :revoke) -- Ticket URL: <http://www.macruby.org/trac/ticket/483> MacRuby <http://macruby.org/>

1 2

Looking for feedback on a draft blog post: Optimising Table Views With MacRuby
by isaac kearse 13 Jan '10

13 Jan '10

Hey Guys, http://isaac.kearse.co.nz/draft/ Looking for any and all feedback: technical, writing, whatever... Cheers, Isaac

3 5

Cocoa Binding to NSArrayController
by steve ross 13 Jan '10

13 Jan '10

I wrote a simple controller that binds to an NSTableView. In the tableview, a column has an NSNumberFormatter (in IB), but the column is what's bound. It's bound to LightboxController.managedObjects:number. The managedObjects collection contains a collection of Lightbox objects, that have a number (Fixnum, when examined) and a title (string). The title displays fine, but the number always displays as 1. Changing the number field to a string and removing the NSNumberFormatter produces the correct display, but of course, the sort order is string ordering rather than numeric. Here is the code. Can anyone tell me what I'm missing here? https://gist.github.com/5d490492a814eccd26b2 Thx, Steve

3 6

NSAssert equivalent in MacRuby?
by Michael Johnston 12 Jan '10

12 Jan '10

Hi, Is there an equivalent of the NSAssert macro in MacRuby? Thanks, Michael Johnston lastobelus(a)mac.com

2 1

[MacRuby] #554: Please implement IO#read_nonblock and IO#write_nonblock
by MacRuby 12 Jan '10

12 Jan '10

#554: Please implement IO#read_nonblock and IO#write_nonblock ----------------------------------------+----------------------------------- Reporter: ernest.prabhakar@… | Owner: lsansonetti@… Type: defect | Status: new Priority: blocker | Milestone: MacRuby 0.5 Component: MacRuby | Keywords: ----------------------------------------+----------------------------------- http://ruby-doc.org/core/classes/IO.html#M002267 http://ruby-doc.org/core/classes/IO.html#M002268 These are extremely useful for doing non-blocking async IO via Dispatch::Source -- Ticket URL: <http://www.macruby.org/trac/ticket/554> MacRuby <http://macruby.org/>

1 1

Re: [MacRuby-devel] [MacRuby] #552: NSOperationQueue segfaults when more than one operation is being added
by MacRuby 12 Jan '10

12 Jan '10

#552: NSOperationQueue segfaults when more than one operation is being added -------------------------------------+-------------------------------------- Reporter: mattaimonetti@… | Owner: lsansonetti@… Type: defect | Status: new Priority: blocker | Milestone: MacRuby 0.5 Component: MacRuby | Keywords: -------------------------------------+-------------------------------------- Comment(by mattaimonetti@…): Thanks Ernie. However, I'm writing a section on some common Foundation classes and a chapter on concurrency programming with MacRuby so, even though GCD will be mentioned as the best option, I still need to cover the other existing solutions ;) -- Ticket URL: <http://www.macruby.org/trac/ticket/552#comment:3> MacRuby <http://macruby.org/>

1 0

Re: [MacRuby-devel] [MacRuby] #552: NSOperationQueue segfaults when more than one operation is being added
by MacRuby 12 Jan '10

12 Jan '10

#552: NSOperationQueue segfaults when more than one operation is being added -------------------------------------+-------------------------------------- Reporter: mattaimonetti@… | Owner: lsansonetti@… Type: defect | Status: new Priority: blocker | Milestone: MacRuby 0.5 Component: MacRuby | Keywords: -------------------------------------+-------------------------------------- Comment(by ernest.prabhakar@…): Not directly relevant to your question, but you can also use GCD directly via the Dispatch module. The basic Queue and Group functionality should be solid in the latest top-of-tree, which I think would address your needs. -- Ticket URL: <http://www.macruby.org/trac/ticket/552#comment:2> MacRuby <http://macruby.org/>

1 0

Re: [MacRuby-devel] [MacRuby] #552: NSOperationQueue segfaults when more than one operation is being added
by MacRuby 12 Jan '10

12 Jan '10

#552: NSOperationQueue segfaults when more than one operation is being added -------------------------------------+-------------------------------------- Reporter: mattaimonetti@… | Owner: lsansonetti@… Type: defect | Status: new Priority: blocker | Milestone: MacRuby 0.5 Component: MacRuby | Keywords: -------------------------------------+-------------------------------------- Comment(by mattaimonetti@…): I was able to add two operations as long as they are from 2 different subclasses: {{{ framework 'Foundation' class MyOperation < NSOperation attr_reader :name def initWithName(name) init @name = name self end def main puts "Hello #{name}" end end class OtherOperation < NSOperation attr_reader :name def initWithName(name) init @name = name self end def main puts "Hello #{name}" end end operation_heidi = MyOperation.alloc.initWithName('Heidi') operation_matt = OtherOperation.alloc.initWithName('Matt') queue = NSOperationQueue.alloc.init queue.addOperation operation_heidi queue.addOperation operation_matt # run the main loop for 2 seconds NSRunLoop.currentRunLoop.runUntilDate(NSDate.dateWithTimeIntervalSinceNow(2.0)) }}} -- Ticket URL: <http://www.macruby.org/trac/ticket/552#comment:1> MacRuby <http://macruby.org/>

1 0

[MacRuby] #531: make #[] and alias for #objectForKey
by MacRuby 11 Jan '10

11 Jan '10

#531: make #[] and alias for #objectForKey -------------------------------------+-------------------------------------- Reporter: mattaimonetti@… | Owner: martinlagardette@… Type: defect | Status: new Priority: blocker | Milestone: MacRuby 0.5 Component: MacRuby | Keywords: -------------------------------------+-------------------------------------- Quite often, Cocoa classes use the #objectForKey method, for instance: {{{ NSLocale.currentLocale.objectForKey(NSLocaleCalendar) }}} I think that it would a lot of the API calls would look better if they would follow the usual Ruby collection API: {{{ NSLocale.currentLocale[NSLocaleCalendar] }}} It's not much but it's a bit like other existing shortcuts: foo= and foo? for setFoo and isFoo. -- Ticket URL: <http://www.macruby.org/trac/ticket/531> MacRuby <http://macruby.org/>

1 6