That's a memory management library and doesn't appear to have anything to do with cross-process semaphores.
Rick On Fri, Dec 7, 2018 at 8:26 AM Enrico Sorichetti via Oorexx-devel < oorexx-devel@lists.sourceforge.net> wrote: > You might get some ideas by looking at how the Boehm GC does it > Enrico > > > > On 7 Dec 2018, at 14:15, Rick McGuire <object.r...@gmail.com> wrote: > > > > Ignoring for a moment the elephant in the corner of the Apple deprecated > (and non-functional) sem_* functions, the *ix versions of the semaphore > functions are really sort of broken. > > > > For the event semaphores, one of the functions is a reset, which uses > sem_init() to perform the reset. This probably doesn't work (or at least, > is not guaranteed to work) because the documentation states that using > sem_init() on an existing semaphore handle is undefined. > > > > The interpreter code uses the SysSemaphore class which implements all of > the desired behavior, but since it uses pthread, it only works for the > unnamed case. It would not be a huge effort to dual path named vs. unnamed, > but the sem_init() problems still exist for the named case. > > > > There are similar problems with the Mutex functions. These are > implemented using the same semaphore functions so a lot of the same issues > exist. Also, I'm not convinced that what is implemented here is a true > mutex function. Again, the classes implemented in SysSemaphore can be used > here, but only for the unnamed cases. I have not been able to find any > equivalent to windows named mutex semaphores in the linux world. > > > > In summary, fixing the unnamed versions of these would be a fairly > simple thing, fixing the named versions, I have no solutions. > > > > Rick > > > > > > _______________________________________________ > > Oorexx-devel mailing list > > Oorexx-devel@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/oorexx-devel > > > > _______________________________________________ > Oorexx-devel mailing list > Oorexx-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/oorexx-devel >
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