Hi all.
I want to know the difference between TOSH_SIGNAL and TOSH_INTERRUPT.
AFAIK, TOSH_SIGNAL can't be preempted by any other external interrupts!
On the other hand, TOSH_INTERRUPT can be preempted by other external
interrupts which have higher priority!
Is it right?
If so, the execution thread starting from TOSH_SIGNAL can't be preempted by
any other external interrupts? Or only TOSH_SIGNAL portion?
In other words,
TOSH_SIGNAL(X) {
signal A_MODULE.A_EVENT();
}
TOSH_SIGNAL(Y) {
signal B_MODULE.B_EVENT();
}
Assume that A_MODULE.A_EVENT() is called by TOSH_SIGNAL and is executing,
and at that time, TOSH_SIGNAL(Y) is fired.
1) TOSH_SIGNAL(Y) can't be fired.
2) TOSH_SIGNAL(Y) can be fired. And it preempts A_MODULE.A_EVENT().
Which is correct?
Best regards,
Man-Ki Yoon
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