* William A. Rowe, Jr.: > Are modern pthread mutexes sufficiently reliable this decade?
glibc and the Linux kernel have bugs in this area, but the basic functionality is there. One problem could be that a switch might not be backwards-compatible from an application point of view. 32-bit and 64-bit applications would not be able to use the same mutex. Upgrading glibc could become more complicated if the shared mutex isn't recreated on boot, but persisted in the file system. Berkeley DB has this problem with process-shared condition variables, but the same problem applies to mutexes as well: <https://bugzilla.redhat.com/show_bug.cgi?id=1394862> POSIX requires that the mutex is reinitialized after the last process detaches from a file mapping (perhaps due to a system reboot), so this is not a conformance issue, strictly speaking.
