From mboxrd@z Thu Jan  1 00:00:00 1970
Content-Type: text/plain; charset=windows-1252; format=flowed; delsp=yes
Mime-Version: 1.0 (Apple Message framework v1075.2)
From: Daniel Lyons <fusion@storytotell.org>
In-Reply-To: <98e535534bd51792a5db3b7af4034fc6@quanstro.net>
Date: Thu,  3 Sep 2009 16:10:20 -0600
Content-Transfer-Encoding: quoted-printable
Message-Id: <626D9216-7A6B-447E-A490-E91D8863D0C8@storytotell.org>
References: <98e535534bd51792a5db3b7af4034fc6@quanstro.net>
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
Subject: Re: [9fans] "Blocks" in C
Topicbox-Message-UUID: 6346a438-ead5-11e9-9d60-3106f5b1d025


On Sep 3, 2009, at 10:02 AM, erik quanstrom wrote:

> in c, i don't see why such a bolt-on would be useful in
> c, especially since your concurrent fifo would be limited
> to one shared-memory node unless you're going to add a runtime
> compiler.


It's primarily an aesthetic benefit. =46rom =
http://arstechnica.com/apple/reviews/2009/08/mac-os-x-10-6.ars/13

- (IBAction)analyzeDocument:(NSButton *)sender
{
   NSDictionary *stats =3D [myDoc analyze];
   [myModel setDict:stats];
   [myStatsView setNeedsDisplay:YES];
   [stats release];
}

becomes

- (IBAction)analyzeDocument:(NSButton *)sender
{
   dispatch_async(dispatch_get_global_queue(0, 0), ^{
   NSDictionary *stats =3D [myDoc analyze];
   dispatch_async(dispatch_get_main_queue(), ^{
       [myModel setDict:stats];
       [myStatsView setNeedsDisplay:YES];
       [stats release];
     });
   });
}

Two more lines of code, and it will execute that block in another =20
thread without having to do much thinking about it.

=97
Daniel Lyons