Hi Borut,
2007/11/6, Borut Razem <[EMAIL PROTECTED]>:
>
> #define SAVE_TASK_CTX(stack_low, stack_high) \
> do { \
> /* Disable global interrupt. */ \
> _asm \
> bcf INTCON, 6, 0 \
> _endasm; \
> _asm \
> movff STATUS, PREINC1 \
> _endasm; \
> _asm \
> movff WREG, PREINC1 \
> _endasm; \
> /* Store the necessary registers to the stack. */ \
> ...
> } while (0)
>
>
> so that the following cases work correctly:
>
> if (...)
> SAVE_TASK_CTX(stack_low, stack_high);
>
>
> if (...)
> SAVE_TASK_CTX(stack_low, stack_high);
> else
> ...
>
Yes. I saw this tips at kernelnewbies.org some years ago. I'm
wondering because the original code works, see the pro_man.c from
PICos18:
if (kernelState & USER)
SAVE_TASK_CTX(stack_low, stack_high);
SCHEDULE;
Very strange!
Cheers,
> Borut
>
Alan
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