[PATCH][libstdc++-v3 parallel mode]

[Johannes Singler]

This patch improves handling the number of threads in parallel 
quicksort. Before, needless threads were created. This is a relict from 
switching to a more OpenMP compliant behavior.

Tested x86_64-unknown-linux-gnu: No regressions

Please approve for mainline and gcc-4_3-branch.

2008-05-06  Johannes Singler  <singler@ira.uka.de>

        * include/parallel/quicksort.h:
        (parallel_sort_qs_conquer) Explicitly request number of threads
        in the parallel clause.
        (parallel_sort_qs) Remove setting the number of threads globally.

Johannes
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