Hi all, I've noticed some problems using shared memory with cygipc, which don't seem to be present in the mailing list archives. I'm running cygwin 1.3.9 with cygipc 1.11 on a W2K machine.
SYMPTOMS If you run multiple times a simple app that attaches a shared memory segment (with shmat), some attachments fail (shmat return -1, errno: invalid argument). TO REPRODUCE THIS BEHAVIOR: - open a cygwin bash shell - launch "ipctest.exe h" to create a shared memory segment - call "ipcs" to know the shmid of the segment you just created - then run "while true; do ipctest.exe h a <shmid>; done" You'll see that some of the attachments fail with "shmat : Invalid argument" Well, I'm not sure this is really a new bug, since I saw that shmat uses mmap and mmap is buggy, right ? Best Regards, Christophe LEITIENNE -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Bug reporting: http://cygwin.com/bugs.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
