[Lazarus] Some questions about thread timing and syncrhonization

[Michael Schnell]

  On 07/12/2010 04:26 PM, Frank Church wrote:
> The code is running in a TProcess executing command prompt programs 
> rather than from an API, 
You mean it's a no-GUI project ?
In fact, at the moment, Lazarus lacks a Application Template and Widget 
Type for programs that need TTimer (and similar things) but are supposed 
to run in a (Linux) system that does not provide a GUI API, Here using 
Threads can be a work-around.

Do you in fact want to run your program on a system that does not 
provide a GUI API ? Otherwise you can just do a normal (GUI enabled) 
application and hide the main form.
> My preferred approach is that even if the thread is suspended during 
> the Synchronize period, it should remain suspended until a timer 
> running in the main thread kicks it of again. I think testing the 
> thread's *while not terminated* loop to see if it is time yet is an 
> inefficent use of resources.
Of course you are right that "busy spinning" always is a bad idea. As 
said, a suspended thread needs to be woken by another thread. In most 
cases there are better synchronizing options than using "suspend". 
(TEvent, TCriticalSection, ...)

-Michael
(BTW.;: Do not top-post. This makes the Forum Thread hard to read.)
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