On 3/9/06, Archie Cobbs <[EMAIL PROTECTED]> wrote: > Weldon Washburn wrote: > > I can now run the below multithread Hello.java on JCHEVM using Apache > > Harmony Class Library. The output toggles between clumps of "Hello > > World" and clumps of "*" as WindowsXP schedules the two application > > threads. This is behavior I would expect. I use System.out.write() > > because System.out.println() does not work yet. A summary follows: > > Wow! Impressive achievment & very cool. > > > Mods to JCHEVM to get it to work > > 1) > > I was not able to find the _JC_LIB_ENTRY that is intended for > > read/writing files. I gave up and "borrowed" > > JCNI_java_lang_VMThread_nativeSetPriority(). Instead of actually > > changing thread priority, it now does a "fprintf(stdout, "%s", > > &priority); fflush(stdout);" Perhaps you can tell me what native > > method I should be using. > > Classpath supplies its own native methods for file I/O. That is, > you can implement file I/O normally using normal native methods. > This is not something the VM needs to be directly involved with. > So the "fix" would be for classlib to implement this itself.
I suspected this. But I could not figure out how to add a new entry into _JC_LIB_ENTRY. I tried but got a bunch of misc error messages so I gave up. If you give me some hints on how to add enties to _JC_LIB_ENTRY, I will take a second stab at it. > > There's no reason you couldn't write a gnu.classpath.Pointer > class if you wanted to. There's no copyright on the package > name :-) I just now wrote an Apache Harmony version of java.lang.Pointer and java.lang.Pointer32. It works fine. I put it in the Harmony/modules/kernel/src/main/java/java/lang directory. It can be move to another place and "re-packaged" once we figure out where it should go. > > By the way jchevm's Thread.setPriority() doesn't work because > I don't know how to implement it using POSIX. > > > 2) > > I commented out some stuff in bootstrap.c that was dragging in > > specific gnu classpath *.class files like "Lgnu/classpath/Pointer;" > > We should discuss the best solution for this item. > > This is use as part of the NIO implementation for "direct" buffers. > A Pointer object simply contains an int or long that holds a void *. > > > One last item. I don't know which SVN repository to place this work > > in. Any suggestions? > > You could create a branch of classlib in the "sandbox". Tim Ellison, Geir Magnusson, I could create a ClassLib branch in the sandbox and call it "kernel_path". It would only contain the generic files needed to glue a GNU ready JVM to Harmony Class Lib. Thoughts? > > Cheers, > -Archie > > __________________________________________________________________________ > Archie Cobbs * CTO, Awarix * http://www.awarix.com > -- Weldon Washburn Intel Middleware Products Division
