Re: [avr-gcc-list] generic queue library for AVR GCC?

[Bjarne Laursen]

Bruce D. Lightner wrote:

> How about this...
>
>     #include <avr/io.h>
>     #include <avr/interrupt.h>
>     #include <inttypes.h>
>     #define begin_critical_section()  SREG; cli()
>     #define end_critical_section(val) SREG = val
>     ....
>     {
>         unsigned char sreg = begin_critical_section();
>         sm_qin = sm_qout = 0;   // reset queue pointers
>         end_critical_section(sreg);
>     }
>
> This gets you the same, optimally efficient AVR code.

but be careful
this will not work:

       unsigned char cr;
       if (bSomeFlag) cr = begin_critical_section();
       sm_qin = sm_qout = 0;   // reset queue pointers
       if (bSomeFlag) end_critical_section(cr);

cli() will get executed even if bSomeFlag is 0.
maybe an inline function will do the job.

-Bjarne