[PD-dev] How to pass indeterminate args to a thread
B. Bogart
ben at ekran.org
Fri Feb 27 22:01:29 CET 2009
Thanks Claude!
I got lots of help from Matju on IRC so things are compiling.
I'm now getting a segfault when trying to access a member of the
structure in the thread function:
#0 0xf7d531cb in strlen () from /lib/i686/cmov/libc.so.6
#1 0xf7d1f648 in vfprintf () from /lib/i686/cmov/libc.so.6
#2 0xf7d43e04 in vsnprintf () from /lib/i686/cmov/libc.so.6
#3 0x080c68d6 in post (fmt=0xf7f7db5a "My symbol: %s")
at s_print.c:51
#4 0xf7f7d829 in mythread ()
from /home/bbogart/src/gphoto/src/pd-external/gphoto2.pd_linux
The way I'm trying to access the member is as follows:
post("My symbol: %s", ((struct floatArgStruct *)threadArgs)->s->s_name);
I've attached the full source.
All this typdef stuff is new to me, so I may have messed up something
obvious.
Thanks,
.b.
Claude Heiland-Allen wrote:
>> post("My symbol: %s", threadArgs.s->s_name); // line 92
>
> threadArgs is a pointer, '.' is only for structs/unions
>
> try '->' instead of '.' to both dereference pointer and access member
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