[fpc-pascal] Synchronize(dummyproc) with Linux.

Sven Barth pascaldragon at googlemail.com
Thu May 2 13:51:16 CEST 2013

Am 02.05.2013 13:25, schrieb Fred van Stappen:
> > that is the slowest system (by a big margin) I have
> > available.
> Im very interested by the result.
> But i continue to think there is something strange with synchronize(). 
> In my logic, synchronize(dummyproc) must have NO effect on the parent 
> thread.
> And it have.
It seems that you didn't read what I wrote. Synchronize always blocks 
until the given method was executed by the main thread. So even if your 
method is empty there will be a delay until the mainthread processes the 
synchronized method. And the more busy the main thread is (e.g. updating 
the GUI) the more time it takes until it can process a synchronized 
message. Also multiple Synchronize events will be executed in multiple 
runs of CheckSynchronize runs, because the "queue" in pre-2.7.1 can only 
hold one element. In 2.7.1 the queue can hold multiple methods enqueue 
by Synchronize and Queue.

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