8 Apr
2012
8 Apr
'12
7:01 p.m.
Hi Mark,
In A, &pos refers to valid chunk of memory, thus
when
jack_transport_query operates on it, it has a valid piece of memory to
work with.
Got it, thanks!
In B, pos (IIRC) would be initialized to NULL as it is
in the file scope.
So when you call jack_transport_query, you have provided a pointer to
NULL, where any memory access will be invalid.
But then why does jack_transport_query not give any error when it is
passed a NULL pointer in the form of pos?
If I remove the line
frame = pos->frame;
from B, the code runs, state is set properly and jackd doesn't report problems.
Thanks for you help.