Le mer 11/08/2004 Ã 10:50, Corinna Vinschen a Ãcrit : > On Aug 11 10:13, bertrand marquis wrote: > > Hello, > > > > i'm making a program using shared memory and as a consequence i need to > > use the cygserver. But when i close my program the ipcs give me this > > output: > > > > $ ipcs -ma > > Shared Memory: > > T ID KEY MODE OWNER GROUP CREATOR > > CGROUP NATTCH SEGSZ CPID LPID ATIME DTIME CTIME > > m 262144 0 --rw------- bma Kein bma > > [...] > > > > In fact all the shared memory i used is still there and is used by > > nobody (NNATCH 0). I thought that the cleanup thread of the cygserver > > was supposed to clean those but i have to remove them myself. Is this a > > normal behavior ? Is there something to configure in cygserver to clean > > those ? > > This is normal behaviour. SYSV IPC is designed to keep the IPC elements > intact even if no process is accessing them. If you want to get rid of > them, then you have to do this by using the appropriate IPC_RMID control > call: > > msgctl (msgid, IPC_RMID, NULL); > semctl (semid, 0, IPC_RMID); > shmctl (shmid, IPC_RMID, NULL); >
Thank you, i will try to find a way to call shmctl from the last thread running. > If you're creating an application which needs shared memory only on > runtime, which should disappear when the last application using it > exits, consider to use simple mmap calls. It's way easier than having > to run cygserver. > > > Corinna -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
