Expand Minimize

RtlRandomEx routine

The RtlRandomEx routine returns a random number that was generated from a given seed value.

Syntax


ULONG RtlRandomEx(
  _Inout_  PULONG Seed
);

Parameters

Seed [in, out]

Unsigned long value from which to generate a random number.

Return value

RtlRandomEx returns a random number in the range [0..MAXLONG-1].

Remarks

RtlRandomEx returns values that are uniformly distributed over the range from zero to the maximum possible LONG value less 1 if it is called repeatedly with the same Seed.

The RtlRandomEx function is an improved version of the RtlRandom function. Compared with the RtlRandom function, RtlRandomEx is twice as fast and produces better random numbers since the period of the random numbers generated is comparatively higher.

Requirements

Version

Available in Microsoft Windows XP and later.

Header

Ntifs.h (include Ntifs.h or Fltkernel.h)

Library

Ntoskrnl.lib

IRQL

< DISPATCH_LEVEL

See also

RtlRandom

 

 

Send comments about this topic to Microsoft

Show:
© 2014 Microsoft