[Bug librt/28799] New: [Feature request] Enhanced timer_create()/timer_delete(), for MS Windows parity

["ulatekh at yahoo dot com" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=28799

            Bug ID: 28799
           Summary: [Feature request] Enhanced
                    timer_create()/timer_delete(), for MS Windows parity
           Product: glibc
           Version: unspecified
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: librt
          Assignee: unassigned at sourceware dot org
          Reporter: ulatekh at yahoo dot com
  Target Milestone: ---

I’m in the middle of porting a very large legacy code base from MS Windows to
Linux.
One outpoint I've run into is in timer_delete(); there's no way to determine
when no more callbacks are forthcoming.
This makes it impossible to clean up safely after deleting a timer, especially
if the value passed in struct sigevent's sigev_value.sival_ptr is dynamically
allocated, e.g. a C++ object.
The MS Windows API call DeleteTimerQueueTimer(), and even the ancient
timeSetEvent(), allow for notification that there will be no forthcoming timer
callbacks.
It pains me to see Linux not having an answer to anything MS Windows can do,
and the fix is easy (though it'll require an updated API, like
timer_create2()/timer_delete2() or something, if one chooses to follow ffmpeg's
convention when APIs are updated.)

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