RtlRandomEx - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers 
#ifndef _NTRTL_H

_Ret_range_(<=, MAXLONG)
NTSYSAPI
ULONG
NTAPI
RtlRandomEx(
    _Inout_ PULONG Seed
    );

#endif

View code on GitHub
// ntifs.h

NTSYSAPI ULONG RtlRandomEx(
  [in, out] PULONG Seed
);
View the official Windows Driver Kit DDI reference

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This function is documented in Windows Driver Kit.

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Windows Driver Kit DDI reference (nf-ntifs-rtlrandomex)

RtlRandomEx function

Description

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

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.

See also

RtlRandom

View the official Windows Driver Kit DDI reference

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