[SCM] Hurd branch, master, updated. v0.5-51-ge971ab1

[Justus Winter]

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- Log -----------------------------------------------------------------
commit e971ab1a229d1ef1d5c1e5e1ff52ec597c55270e
Author: Justus Winter <address@hidden>
Date:   Mon Nov 11 20:53:07 2013 +0100

    libports: implement lockless management of threads
    
    ports_manage_port_operations_multithread uses two values, totalthreads
    and nreqthreads, to manage the threads it creates.  Previously a lock
    was used to synchronize the access to them. Use atomic operations
    instead.
    
    * libports/manage-multithread.c (ports_manage_port_operations_multithread):
      Use atomic operations instead of a lock to synchronize the access to
      totalthreads and nreqthreads.

-----------------------------------------------------------------------

Summary of changes:
 libports/manage-multithread.c |   53 ++++++++++++++---------------------------
 1 files changed, 18 insertions(+), 35 deletions(-)


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