[Bug nptl/14300] New: Add pid_t pthread_gettid_np(pthread_t *thr).

[Bug nptl/14300] New: Add pid_t pthread_gettid_np(pthread_t *thr).

[nmiell at gmail dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=14300

             Bug #: 14300
           Summary: Add pid_t pthread_gettid_np(pthread_t *thr).
           Product: glibc
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: nptl
        AssignedTo: unassigned@sourceware.org
        ReportedBy: nmiell@gmail.com
                CC: drepper.fsp@gmail.com
    Classification: Unclassified


fcntl(fd, F_SETOWN_EX, &((struct f_owner_ex) {F_OWNER_TID, tid})) needs some
way of getting a thread's TID, and manually calling the gettid() syscall
yourself is ugly.

There should probably be a way of converting a TID to a pthread_t, too.

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[Bug nptl/14300] Add pid_t pthread_gettid_np(pthread_t *thr).

[bugdal at aerifal dot cx]

http://sourceware.org/bugzilla/show_bug.cgi?id=14300

Rich Felker <bugdal at aerifal dot cx> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |bugdal at aerifal dot cx

--- Comment #1 from Rich Felker <bugdal at aerifal dot cx> 2012-06-27 13:02:46 UTC ---
Converting a TID to a pthread_t is highly non-trivial; there's no direct
mapping possible. The best way I can think of is using one of the
pthread-implementation-reserved signals to signal the TID and request it to
call pthread_self and pass back the result.

Another option that would remove the need for the difficult-to-provide
interface just for the sake of having an inverse function would be to forget
pthread_gettid_np and just expose gettid (if it's not already exposed). I would
say best practices would have a thread arranging for its own receipt of signals
rather than having other threads set it up...

Anyway, shouldn't this report/request be marked as "enhancement" importance
rather than "normal" or even "minor"? It doesn't seem like a bug.

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[Bug nptl/14300] Add pid_t pthread_gettid_np(pthread_t *thr).

[neleai at seznam dot cz]

https://sourceware.org/bugzilla/show_bug.cgi?id=14300

Ondrej Bilka <neleai at seznam dot cz> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |neleai at seznam dot cz
           Severity|normal                      |enhancement

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[Bug nptl/14300] Add pid_t pthread_gettid_np(pthread_t *thr).

[neleai at seznam dot cz]

https://sourceware.org/bugzilla/show_bug.cgi?id=14300

Ondrej Bilka <neleai at seznam dot cz> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |DUPLICATE

--- Comment #2 from Ondrej Bilka <neleai at seznam dot cz> ---
Duplicate

*** This bug has been marked as a duplicate of bug 6399 ***

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[Bug nptl/14300] Add pid_t pthread_gettid_np(pthread_t *thr).

[fweimer at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=14300

Florian Weimer <fweimer at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
              Flags|                            |security-

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[Bug nptl/14300] Add pid_t pthread_gettid_np(pthread_t *thr).

[fweimer at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=14300

Florian Weimer <fweimer at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           See Also|                            |https://sourceware.org/bugz
                   |                            |illa/show_bug.cgi?id=27880

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[Bug nptl/14300] Add pid_t pthread_gettid_np(pthread_t *thr).

[fweimer at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=14300

Florian Weimer <fweimer at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |fweimer at redhat dot com

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