[fpc-pascal] Main thread wait and CheckSynchronize

[Brad Campbell]

Michael Van Canneyt wrote:
> 
> Hello,
> 
> I think that what you did is the only right solution. Synchronizing
> threads is tricky, and the default mechanism is meant for GUI apps where 
> the main thread is the GUI thread.
> 

I wish there was a way for a thread to asynchronously notify the main thread there is a 
Synchronize() pending. On Linux I can insert an fd() for a pipe into the gtk event loop and poke 
data into the pipe from the thread. It's incredibly efficient and saves all the waiting and polling. 
I've not worked out how to do this on OSX or Win32 yet though.

Brad
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