Hi Sapan,
The JNI code in $PTII/jni is obsolete, see the code in
$PTII/ptolemy/actor/lib/jni instead. I just marked the code
in $PTII/jni as deprecated.
The code uses gmake, the GNU make program. Under Windows, you must
install Cygwin, see
http://ptolemy.eecs.berkeley.edu/ptolemyII/ptIIlatest/cygwin.htm"and
then you may need to make a symbolic link from gmake to make by
starting up Cygwin bash and doing:
cd c:/cygwin/usr/bin
ln -s make.exe gmake.exe
If you don't have gmake in your path, you might see the message you saw
which occurs under Windows because the Windows, Java calls the Windows
CreateProcess function, which returns 2, which means that theexecutable,
in this case, gmake cannot be found.
It looks like we don't have good step by step instructions for creating
a custom C actor using the newer JNI code in ptolemy.actor.lib.jni.
Your best bet is to look at the Scale demo in
$PTII/ptolemy/actor/lib/jni/demo/Scale
and the demo that invokes the plotter at
$PTII/ptolemy/codegen/c/demo/Butterfly
Note that using JNI is somewhat tricky in that it requires knowledgen of
C and Java. Also, programs that use JNI are more likely to have hard
crashes because the C portion can do anything, including segfault.
_Christopher
Sapan AGARWAL wrote:
Hi All,
I was trying to create a custom actor in C using JNI Actor. I am currently using
Ptolemy6.0.2. I invoked vergil using "vergil -jni".But I do not see
JNI/Generate C Interface as per documentation. Also when I drag the JNICodeGenerator
actor and double click on it to generate the code, it gives me an error :
IOException: java.io.IOException: CreateProcess: gmake -C jni/testTrois -f
JnijnitestTroisIfnTest.mk error=2
Can anyone please let me know the reason for this and what is the correct
procedure to create custom actor in C using JNI ?
Thanks & Regards,
Sapan Agarwal
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Christopher Brooks (cxh at eecs berkeley edu) University of California
CHESS Executive Director US Mail: 337 Cory Hall
Programmer/Analyst CHESS/Ptolemy/Trust Berkeley, CA 94720-1774
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