Darwin OpenJDK 7 Binaries - Not Working With SWT

Mike Swingler swingler at apple.com
Sun Oct 12 08:21:06 PDT 2008


On Oct 11, 2008, at 6:14 PM, Michael Franz wrote:

> Hi,
>
> On Sun, Sep 7, 2008 at 9:22 PM, Landon Fuller <landonf at plausiblelabs.com 
> > wrote:
>
> On Sep 7, 2008, at 1:08 PM, Michael Franz wrote:
>
> I changed the startup to not pass the flag.  I was running this from  
> inside eclipse, but eclipse must somehow pass the option as it did  
> not show up in the command.
>
> There are two small patches from SoyLatte that need to be re- 
> implemented for OpenJDK, both of which you have run into:
>
> -XstartOnFirstThread:
>
>        Soylatte by starts a Cocoa runloop on the first thread, and  
> then run the JVM main() function again on a separate thread
>        Setting -XstartOnFirstThread has the same behavior on Mac OS  
> X, in that Java is started directly on the first thread.
>
> Reading through the code and finding a few bugs on primordial  
> threads and this blog entry[1] , I wonder if -XstartOnFirstThread is  
> really OS X specific (I assumed it was).
>
> I was also reading through the Cocoa reference I have, my  
> understanding is that it is possible to create a runloop on other  
> threads, not just the first thread.

You can create runloops on other threads, but their sources will be  
setup by you. Only the runloop on Thread 0 receives keyboard and mouse  
events, which is why -XstartOnFirstThread is necessary when user-space  
code wants to pump the event loop. Otherwise, Thread 0 needs to be  
parked until it's time for the AWT to startup, and start running the  
show.

Cheers,
Mike Swingler
Java Runtime Engineer
Apple Inc.
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