[Python-checkins] CVS: python/dist/src/Python ceval.c,2.195,2.196

[Guido van Rossum]

Update of /cvsroot/python/python/dist/src/Python
In directory slayer.i.sourceforge.net:/tmp/cvs-serv4141

Modified Files:
	ceval.c 
Log Message:
Charles Waldman's patch to reinitialize the interpreter lock after a
fork.  This solves the test_fork1 problem.  (ceval.c, signalmodule.c,
intrcheck.c)

SourceForge: [ Patch #101226 ] make threading fork-safe


Index: ceval.c
===================================================================
RCS file: /cvsroot/python/python/dist/src/Python/ceval.c,v
retrieving revision 2.195
retrieving revision 2.196
diff -C2 -r2.195 -r2.196
*** ceval.c	2000/08/24 20:11:31	2.195
--- ceval.c	2000/08/27 17:33:16	2.196
***************
*** 143,146 ****
--- 143,165 ----
  	PyThread_release_lock(interpreter_lock);
  }
+ 
+ /* This function is called from PyOS_AfterFork to ensure that newly
+    created child processes don't hold locks referring to threads which
+    are not running in the child process.  (This could also be done using
+    pthread_atfork mechanism, at least for the pthreads implementation.) */
+ 
+ void
+ PyEval_ReInitThreads(void)
+ {
+ 	if (!interpreter_lock)
+ 		return;
+ 	/*XXX Can't use PyThread_free_lock here because it does too
+ 	  much error-checking.  Doing this cleanly would require
+ 	  adding a new function to each thread_*.h.  Instead, just
+ 	  create a new lock and waste a little bit of memory */
+ 	interpreter_lock = PyThread_allocate_lock();
+ 	PyThread_acquire_lock(interpreter_lock, 1);
+ 	main_thread = PyThread_get_thread_ident();
+ }
  #endif