git: libthread_xu: add support for named POSIX semaphores.

[Joris Giovannangeli]

commit 1a09a5c7d3dc38e61fc28441d066b071ad659dc0
Author: Joris Giovannangeli <joris at giovannangeli.fr>
Date:   Wed Jun 4 15:48:38 2014 +0200

    libthread_xu: add support for named POSIX semaphores.
    
     * this implementation uses files as rendezvous and simply map files
       into the process address space. It means one page per semaphore.
    
     * by default, semaphores are created in /tmp/sem. If the
       LIBTHREAD_SEM_PREFIX environment variable is defined, its value is
       used as prefix.

Summary of changes:
 etc/mtree/BSD.var.dist            |   2 +
 lib/libpthread/sem_open.3         | 194 ++++++++++++++--
 lib/libthread_xu/thread/thr_sem.c | 463 ++++++++++++++++++++++++++++++++++++--
 share/man/man7/hier.7             |   4 +
 sys/sys/unistd.h                  |   2 +-
 5 files changed, 619 insertions(+), 46 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/1a09a5c7d3dc38e61fc28441d066b071ad659dc0


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