[Pgpool-committers] pgpool - pgpool: Add POOL_SETMASK2 macro.

[User Y-asaba]

Log Message:
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Add POOL_SETMASK2 macro. POOL_SETMASK2 returns previous signal mask.

Error report functions(pool_error() etc.) save current signal mask and
set new signal mask(BlockSig). Then restore the signal mask before
returning.

Modified Files:
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    pgpool:
        pool_error.c (r1.4 -> r1.5)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgpool/pgpool/pool_error.c.diff?r1=1.4&r2=1.5)
        pool_signal.h (r1.2 -> r1.3)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgpool/pgpool/pool_signal.h.diff?r1=1.2&r2=1.3)