RtlRandomEx function (ntifs.h)

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

Syntax

NTSYSAPI ULONG RtlRandomEx(
  [in, out] PULONG Seed
);

Parameters

[in, out] Seed

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

Requirement	Value
Minimum supported client	Windows XP
Target Platform	Universal
Header	ntifs.h (include Ntifs.h, Fltkernel.h)
Library	NtosKrnl.lib
DLL	NtosKrnl.exe
IRQL	< DISPATCH_LEVEL

See also

RtlRandom