On Wed, 2011-12-21 at 22:48 +0200, raz ben yehuda wrote: > Vxworks is the use case. And there are plenty of companies with > vxWorks software and in i believe they will migrate sooner or later to > PreemptRT. My current company uses old wrapper software that implements > vxWorks semaphores as system V semaphores. vxWorks semaphores have a priority > feature which is widely used. > I will probably change it some time in the future to posix semaphores , but posix > semaphores are implemented in glibc with futexes and atomic ops and i rather > mess with kernel and not glibc. funny , but true. glibc is harder. Semaphores are a fscking trainwreck for real-time programming. Don't use them, full stop. If you do, you're doing it wrong, it's really that simple. Use PI mutexes, which are already fully supported in glibc, no extra patching needed. Full NAK for any and all priority fudging for any semaphore implementation. -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
