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Generate a pseudo-random nonnegative long integer in a thread-safe manner
#include <stdlib.h>
long nrand48( unsigned short xsubi[3] );
- xsubi
- An array that comprises the 48 bits of the initial value that you want
to use.
libc
Use the -l c option to
qcc
to link against this library.
This library is usually included automatically.
The nrand48() function uses a linear congruential algorithm and
48-bit integer arithmetic to generate a nonnegative long integer
uniformly distributed over the interval
[0, 231].
The xsubi array should contain the desired initial value; this
makes nrand48() thread-safe, and lets you start a sequence of
random numbers at any known value.
A pseudo-random long integer.
POSIX 1003.1 XSI
Safety: | |
Cancellation point |
No |
Interrupt handler |
No |
Signal handler |
No |
Thread |
Yes |
drand48(),
erand48(),
jrand48(),
lcong48(),
lrand48(),
mrand48(),
seed48(),
srand48()
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