Strictly atomic operations

[Matt Rippa]

Greetings,

In VxWorks 5.5 we use taskLock()/taskUnlock() to stop the possibility of
preemption for a critical region of code. This doesn't stop interrupts as
described here: http://www.vxdev.com/docs/vx55man/vxworks/ref/taskLib.
html#taskLock

What would be the recommended approach in rtems? Using semaphores would not
prevent a higher priority thread from preempting me.

Thank you,
-Matt
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