At 3:50 PM -0700 1999/07/13, Oliver King-Smith wrote:
>I have three questions about the Palm OS.
>
>1) If I am running in my own code and I am not calling any Palm OS API
>points (code is compiled C++ in this case) I have seen evidence of the Palm
>OS taking control for a part of a second. Is this true? Can the Palm OS
>take control while your code is running even if you are not making an API
>call.
Yes. The Palm OS uses a preemptive multitasking kernel.
>2) If the Palm OS can take control (and this is not unreasonable think to
>do) do I have any guarantees about the longest time the Palm OS code can
>take during one of these interrupts?
Nope. It's not a real-time OS.
>3) Assume 1 is true, if I turn off interrupts, does this prevent the Palm
>OS from taking control, and what are the adverse consequences of doing
>this? For example if I turn of interrupts for 250ms will that disturb the OS.
This will disturb the OS (so don't do it).
Regards,
Jim Schram
3Com/Palm Computing
Partner Engineering
