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| author | wes <wes@FreeBSD.org> | 1999-05-24 23:30:14 +0000 |
|---|---|---|
| committer | wes <wes@FreeBSD.org> | 1999-05-24 23:30:14 +0000 |
| commit | 07cfb42e12b672d06d6f6b256112061344b20304 (patch) | |
| tree | 607d3a9b4cc9f00a09d231ffbf524da18ad082a0 /lib/libc/stdlib/rand.3 | |
| parent | ebabc28d791103599fd2ff7fa2a35ac1667ca242 (diff) | |
| download | FreeBSD-src-07cfb42e12b672d06d6f6b256112061344b20304.zip FreeBSD-src-07cfb42e12b672d06d6f6b256112061344b20304.tar.gz | |
Added Posix rand_r function.
Diffstat (limited to 'lib/libc/stdlib/rand.3')
| -rw-r--r-- | lib/libc/stdlib/rand.3 | 26 |
1 files changed, 22 insertions, 4 deletions
diff --git a/lib/libc/stdlib/rand.3 b/lib/libc/stdlib/rand.3 index f2e3742..2aadd6c 100644 --- a/lib/libc/stdlib/rand.3 +++ b/lib/libc/stdlib/rand.3 @@ -35,12 +35,13 @@ .\" .\" @(#)rand.3 8.1 (Berkeley) 6/4/93 .\" -.Dd June 4, 1993 +.Dd May 25, 1999 .Dt RAND 3 .Os .Sh NAME .Nm rand , -.Nm srand +.Nm srand , +.Nm rand_r .Nd bad random number generator .Sh SYNOPSIS .Fd #include <stdlib.h> @@ -48,6 +49,8 @@ .Fn srand "unsigned seed" .Ft int .Fn rand void +.Ft int +.Fn rand_r "unsigned *ctx" .Sh DESCRIPTION .Bf -symbolic These interfaces are obsoleted by random(3). @@ -63,15 +66,26 @@ of 0 to .Pp The .Fn srand -function sets its argument as the seed for a new sequence of +function sets its argument +.Fa seed +as the seed for a new sequence of pseudo-random numbers to be returned by .Fn rand . These sequences are repeatable by calling .Fn srand with the same seed value. .Pp -If no seed value is provided, the functions are automatically +If no +.Fa seed +value is provided, the functions are automatically seeded with a value of 1. +.Pp +.Fn rand_r +provides the same functionality as +.Fn rand . +A pointer to the context value +.Fa ctx +must be supplied by the caller. .Sh SEE ALSO .Xr random 3 .Sh STANDARDS @@ -82,3 +96,7 @@ and functions conform to .St -ansiC . +.Pp +The +.Fn rand_r +function is as proposed in the POSIX.4a Draft #6 document. |
