locking support for random() prng
authorRich Felker <dalias@aerifal.cx>
Wed, 29 Jun 2011 19:29:52 +0000 (15:29 -0400)
committerRich Felker <dalias@aerifal.cx>
Wed, 29 Jun 2011 19:29:52 +0000 (15:29 -0400)
these interfaces are required to be thread-safe even though they are
not state-free. the random number sequence is shared across all
threads.


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