I'm working on an Objective-C bridge for Pike, and I've got a problem as it relates to threads that I'd like to get some input on. My module wraps Objective-C objects within Pike objects and the other way around. The problem I'm running into is when I try to create threads in Objective-C. I create the thread successfully (using NSThread). The new thread is supposed to run some c code that eventually finds a Pike function to run, pushes its arguments onto the stack, then calls the function with those arguments. When running in Hilfe, everything seems to work fine until I call apply_svalue(). At that point, Pike dies:

.NSClass("NSThread")->detachNewThreadSelector_toTarget_withObject_

("run", dummythreadrunner(), .NSClass("NSString")->stringWithCString ("foo")); Whee! We're wrappin' an object, thread=-1610559648 PiObjCObject.methodSignatureForSelector: run (1) Result: 0

PiObjCObject.forwardInvocation: run

pushed args, thread=25755136 C stack overflow. src/modules/files/file.c:3913: Fd(0)->read (Public.ObjectiveC.dummythreadrunner()->run,"C stack overflow.\n") /usr/local/pike/7.6.86/lib/modules/Stdio.pmod/module.pmod:109: Stdio.File("stdin", "r", 777 /* fd=0 */)->read() /usr/local/pike/7.6.86/lib/modules/Stdio.pmod/Readline.pike:568: Stdio.Readline()->InputController()->run_blocking() /usr/local/pike/7.6.86/lib/modules/Stdio.pmod/Readline.pike:1603: Stdio.Readline()->edit("",UNDEFINED,UNDEFINED) /usr/local/pike/7.6.86/lib/modules/Tools.pmod/Hilfe.pmod:2258: Tools.Hilfe.StdinHilfe()->create(UNDEFINED) /usr/local/pike/7.6.86/lib/modules/Tools.pmod/Hilfe.pmod:0: Tools.Hilfe->StdinHilfe()

As you can see, the thread is created, and code is running in the new thread. I've not released the thread lock in my code (it bails out either way), and until assign_svalue is called, all of the other calls to internal c-pike functions work successfully (see forwardInvocation PiObjCObject.m in CVS). Any suggestions about how I can solve this problem?

source is available here:

http://buoy.riverweb.com:8080/viewrep/cvs/pike_modules/Public_ObjectiveC

Bill