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## 9. critical Functions.

A special keyword may be associated with a function declaring it as 'critical'. SDCC will generate code to disable all interrupts upon entry to a critical function and enable them back before returning . Note that nesting critical functions may cause unpredictable results.

eg

    int foo () critical
    {
    ...
    ...
    }

The critical attribute maybe used with other attributes like reentrant.

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