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Generate a pseudo-random double in a thread-safe manner
#include <stdlib.h>
double erand48( unsigned short int 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 erand48() function uses a linear congruential algorithm and
48-bit integer arithmetic to generate a nonnegative double
uniformly distributed over the interval [0.0, 1.0].
It's a thread-safe version of
drand48().
The xsubi array should contain the desired initial value; this
makes erand48() thread-safe, and lets you start a sequence of
random numbers at any known value.
A pseudo-random double.
POSIX 1003.1 XSI
Safety: | |
Cancellation point |
No |
Interrupt handler |
No |
Signal handler |
No |
Thread |
Yes |
drand48(),
jrand48(),
lcong48(),
lrand48(),
mrand48(),
nrand48(),
seed48(),
srand48()
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