> -----Original Message----- > From: Clemens Ladisch [mailto:clem...@ladisch.de] > Sent: Wednesday, January 29, 2014 2:31 AM > To: Network Nut > Cc: linux-kernel@vger.kernel.org > Subject: RE: WaitForMultipleObjects/etc. In Kernel > > Network Nut wrote: > >I was looking at POSIX because it allows naming of the primitives. > > Linux uses two orthogonal mechanisms for synchronization primitives and for > naming/sharing. > > >I need to epoll_wait on inter-process {mutex, event, semaphore}. > > Use eventfd. > > >I need to reference inter-process {mutex, event, semaphore}, each > >identified by string, if feasible. > > Send the fd through a Unix domain socket.
Hi Again, I was thinking that, rather than as for specifics, I should present my general problem, and ask how long-time Linux experts would solve it. I have a master process M, that executes continually, from the birth to death of user-session. I have many (distinct) processes that will be launched, and these processes, P1, P2, ...Pn, expect to see that M is executing. These processes: 1. expect to have access to a shared-memory section that already exists because M created it 2. expect to use a semaphore that already exists because M created it 3. expect to use a mutex that exists because M created it P1, P2, ...Pn all know the path of image on disk of M. They are also permitted to maintain a fixed string that can be used to "get at" the mutex and semaphore. How would P1, P2, ...Pn get at the semaphore that M created? Please note that M cannot have any prior knowledge at all of P1, P2, ...Pn. P1...etc. must initiate communication with M. [I don't want to misuse/abuse linux-kernel with my personal questions, so if there is a more appropriate group, please let me know.] Regards, -Net -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
