In this case is the messages are sent in both directions. However it is very 
"simple" messages and no message queue is needed. To use LEAP mailbox would be 
"overkill"

/Lennart

> -----Original Message-----
> From: Hans Feldt
> Sent: den 20 juni 2013 13:46
> To: Lennart Lund
> Cc: [email protected]; [email protected]
> Subject: Re: [devel] [PATCH 0 of 7] Review request: logsv: Fix hanging main
> thread when file i/o don't return
> 
> Why isn't the same design pattern used as in all other services in opensaf - a
> LEAP mailbox for *message passing* between threads?
> 
> Thanks,
> Hans
> 
> On 06/18/2013 02:54 PM, Lennart Lund wrote:
> > Summary: logsv: Fix hanging main thread when file i/o don't return
> > Review request for Trac Ticket(s): #9 Peer Reviewer(s): Madhurika
> > Koppula, (Anders Widell, Hans Feldt) Pull request to: NA Affected
> > branch(es): devel (4.4) Development branch: <<IF ANY GIVE THE REPO
> > URL>>
> >
> > --------------------------------
> > Impacted area       Impact y/n
> > --------------------------------
> >   Docs                    n
> >   Build system            n
> >   RPM/packaging           n
> >   Configuration files     n
> >   Startup scripts         n
> >   SAF services            y
> >   OpenSAF services        n
> >   Core libraries          n
> >   Samples                 n
> >   Tests                   n
> >   Other                   n
> >
> >
> > Comments (indicate scope for each "y" above):
> > ---------------------------------------------
> > All file operations are handled in a separate thread. Functions doing
> > operations on file system are changed so that this operations are done
> > by a "handler" that is running in a separate thread. If a file
> > operation "hangs" it will be timed out and an error is reported back to the
> main thread.
> >
> > NOTE:
> > In order to simplify retesting and troubleshooting some test traces
> > and test code (tagged with LLDTEST) is not yet removed. This will be
> removed or changed to "correct"
> > TRACEs and LOGs before pushing.
> >
> > changeset 2296ad137a4f783c3efc69adf8db7261697aa327
> > Author:     Lennart Lund <[email protected]>
> > Date:       Tue, 18 Jun 2013 12:35:03 +0200
> >
> >     logsv: Fix hanging main thread when file i/o don't return. Part 1
> >
> >     Generic thread handling:
> >     - Generic thread handling
> >     - Test handlers and two "real" handlers implemented
> >
> > changeset a6c505373ce8925fe2b8bf100c864b27d7f14b72
> > Author:     Lennart Lund <[email protected]>
> > Date:       Tue, 18 Jun 2013 12:35:52 +0200
> >
> >     logsv: Fix hanging main thread when file i/o don't return. Part 2
> >
> >     More functions converted to use threaded file handling.
> >     - get_number_of_log_files_hdl()
> >     - Cleaning up init handling
> >
> > changeset e7119938da9f307f20aab9894934be08a122941f
> > Author:     Lennart Lund <[email protected]>
> > Date:       Tue, 18 Jun 2013 12:39:00 +0200
> >
> >     logsv: Fix hanging main thread when file i/o don't return. Part 3
> >
> >     More functions converted to use threaded file handling.
> >     - write log record function
> >
> > changeset 0574270ab6bf3a65548a8d23ec2989e9f26d67aa
> > Author:     Lennart Lund <[email protected]>
> > Date:       Tue, 18 Jun 2013 12:45:34 +0200
> >
> >     logsv: Fix hanging main thread when file i/o don't return. Part 4
> >
> >     More functions converted to use threaded file handling.
> >     - create_config_file_hdl
> >
> > changeset b989e158e38afa8fc231f40d0a32262611a334d2
> > Author:     Lennart Lund <[email protected]>
> > Date:       Tue, 18 Jun 2013 12:45:49 +0200
> >
> >     logsv: Fix hanging main thread when file i/o don't return. Part 5
> >
> >     More functions converted to use threaded file handling.
> >     - lgs_file_rename_hfop(..)
> >
> > changeset aa83514345401e13c648d7d78940fc3b50f05636
> > Author:     Lennart Lund <[email protected]>
> > Date:       Tue, 18 Jun 2013 12:45:50 +0200
> >
> >     logsv: Fix hanging main thread when file i/o don't return. Part 6
> >
> >     More functions converted to use threaded file handling:
> >     - check_path_exists_hdl(..)
> >     - This is the first inc for error handling updates.
> >
> > changeset 54b294afdfdc79c3fda2ef925939fc82633ce6ab
> > Author:     Lennart Lund <[email protected]>
> > Date:       Tue, 18 Jun 2013 12:45:50 +0200
> >
> >     logsv: Fix hanging main thread when file i/o don't return. Part 7
> >
> >     - Handling of object implementer rejects
> >     - Invalidate stream fd if errno EBADF when writing log record
> >     - Fix Error handling for too long path (> PATH_MAX)
> >     - Rename function that got temporary names during devel
> >     - Functions that uses a handler in file thread has got extension _h
> >
> >
> > Added Files:
> > ------------
> >   README_LOGENH
> >   osaf/services/saf/logsv/lgs/lgs_file.c
> >   osaf/services/saf/logsv/lgs/lgs_file.h
> >   osaf/services/saf/logsv/lgs/lgs_filehdl.c
> >   osaf/services/saf/logsv/lgs/lgs_filehdl.h
> >
> >
> > Complete diffstat:
> > ------------------
> >   osaf/services/saf/logsv/lgs/Makefile.am   |    8 +-
> >   osaf/services/saf/logsv/lgs/lgs.h         |    3 +-
> >   osaf/services/saf/logsv/lgs/lgs_amf.c     |   10 +-
> >   osaf/services/saf/logsv/lgs/lgs_cb.h      |    2 +
> >   osaf/services/saf/logsv/lgs/lgs_evt.c     |   30 +++---
> >   osaf/services/saf/logsv/lgs/lgs_evt.h     |    4 +
> >   osaf/services/saf/logsv/lgs/lgs_file.c    |  421
> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> +++++++++++++++++++++++++++++++++++
> >   osaf/services/saf/logsv/lgs/lgs_file.h    |  121
> ++++++++++++++++++++++++++
> >   osaf/services/saf/logsv/lgs/lgs_filehdl.c |  377
> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> +++++++++++++++++++++++++
> >   osaf/services/saf/logsv/lgs/lgs_filehdl.h |   30 ++++++
> >   osaf/services/saf/logsv/lgs/lgs_imm.c     |   87 +++++++++++-------
> >   osaf/services/saf/logsv/lgs/lgs_main.c    |   14 ++-
> >   osaf/services/saf/logsv/lgs/lgs_mbcsv.c   |   16 +-
> >   osaf/services/saf/logsv/lgs/lgs_stream.c  |  338
> ++++++++++++++++++++++++++++++++++++++++++++++++++--------------
> ----------
> >   osaf/services/saf/logsv/lgs/lgs_stream.h  |   27 +++--
> >   osaf/services/saf/logsv/lgs/lgs_util.c    |  105 ++++++++++++++++++++--
> >   osaf/services/saf/logsv/lgs/lgs_util.h    |   15 ++-
> >   17 files changed, 1401 insertions(+), 207 deletions(-)
> >
> >
> > Testing Commands:
> > -----------------
> > logtest can be used to run a regression test.
> >
> >
> > Testing, Expected Results:
> > --------------------------
> > All tests shall pass.
> > If the file handler thread is "hanging" then
> > - tests that writes log records will fail
> > - IMM configuration of log related objects that requires
> >    access to file system will fail
> >
> >
> > Conditions of Submission:
> > -------------------------
> > Ack by Madhurika Koppula
> >
> >
> > Arch      Built     Started    Linux distro
> > -------------------------------------------
> > mips        n          n
> > mips64      n          n
> > x86         n          n
> > x86_64      n          n
> > powerpc     n          n
> > powerpc64   n          n
> >
> >
> > Reviewer Checklist:
> > -------------------
> > [Submitters: make sure that your review doesn't trigger any
> > checkmarks!]
> >
> >
> > Your checkin has not passed review because (see checked entries):
> >
> > ___ Your RR template is generally incomplete; it has too many blank entries
> >      that need proper data filled in.
> >
> > ___ You have failed to nominate the proper persons for review and push.
> >
> > ___ Your patches do not have proper short+long header
> >
> > ___ You have grammar/spelling in your header that is unacceptable.
> >
> > ___ You have exceeded a sensible line length in your
> headers/comments/text.
> >
> > ___ You have failed to put in a proper Trac Ticket # into your commits.
> >
> > ___ You have incorrectly put/left internal data in your comments/files
> >      (i.e. internal bug tracking tool IDs, product names etc)
> >
> > ___ You have not given any evidence of testing beyond basic build tests.
> >      Demonstrate some level of runtime or other sanity testing.
> >
> > ___ You have ^M present in some of your files. These have to be removed.
> >
> > ___ You have needlessly changed whitespace or added whitespace crimes
> >      like trailing spaces, or spaces before tabs.
> >
> > ___ You have mixed real technical changes with whitespace and other
> >      cosmetic code cleanup changes. These have to be separate commits.
> >
> > ___ You need to refactor your submission into logical chunks; there is
> >      too much content into a single commit.
> >
> > ___ You have extraneous garbage in your review (merge commits etc)
> >
> > ___ You have giant attachments which should never have been sent;
> >      Instead you should place your content in a public tree to be pulled.
> >
> > ___ You have too many commits attached to an e-mail; resend as threaded
> >      commits, or place in a public tree for a pull.
> >
> > ___ You have resent this content multiple times without a clear indication
> >      of what has changed between each re-send.
> >
> > ___ You have failed to adequately and individually address all of the
> >      comments and change requests that were proposed in the initial review.
> >
> > ___ You have a misconfigured ~/.hgrc file (i.e. username, email etc)
> >
> > ___ Your computer have a badly configured date and time; confusing the
> >      the threaded patch review.
> >
> > ___ Your changes affect IPC mechanism, and you don't present any results
> >      for in-service upgradability test.
> >
> > ___ Your changes affect user manual and documentation, your patch series
> >      do not contain the patch that updates the Doxygen manual.
> >
> >
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