[Chicken-janitors] Re: #218: random not random

[Chicken Trac]

#218: random not random
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 Reporter:  zbigniew  |       Owner:       
     Type:  defect    |      Status:  new  
 Priority:  minor     |   Milestone:  4.6.0
Component:  unknown   |     Version:       
 Keywords:            |  
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Comment(by zbigniew):

 However, there's still a worse problem.  On Windows and Solaris, rand()
 returns a number between 0 and 32767.  This means that in N trials of
 (random 100000000), you can only ever get 32768 unique numbers.

 Furthermore Windows (XP) seems to exhibit the same problem as OS X where
 it returns the same initial random number for many seconds, and
 furthermore, the returned numbers are sequential!

 {{{ 960 960 ... 961 ... 964 964 964 964 964 964 964 965 965 965 ... }}}

 Unfortunately to fix this you start getting into OS-specific functions
 like rand_s() on Windows (needs XP or higher) and drand48(3) on Solaris.

-- 
Ticket URL: <http://www.irp.oist.jp/trac/chicken/ticket/218#comment:1>
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