VLC  4.0.0-dev
Functions
vlc_rand.h File Reference
Include dependency graph for vlc_rand.h:

Go to the source code of this file.

Functions

VLC_EXPORT void vlc_rand_bytes (void *buf, size_t len)
 
VLC_EXPORT double vlc_drand48 (void)
 PRNG uniformly distributed between 0.0 and 1.0 with 48-bits precision. More...
 
VLC_EXPORT long vlc_lrand48 (void)
 PRNG uniformly distributed between 0 and 2^32 - 1. More...
 
VLC_EXPORT long vlc_mrand48 (void)
 PRNG uniformly distributed between -2^32 and 2^32 - 1. More...
 

Detailed Description

This file defined random number generator function in vlc

Function Documentation

◆ vlc_drand48()

VLC_EXPORT double vlc_drand48 ( void  )

PRNG uniformly distributed between 0.0 and 1.0 with 48-bits precision.

Note
Contrary to POSIX drand48(), this function is thread-safe.
Warning
Series generated by this function are not reproducible. Use erand48() if you need reproducible series.
Returns
a double value within [0.0, 1.0] inclusive

References erand48(), init_rand48(), rand48, vlc_mutex_lock(), and vlc_mutex_unlock().

◆ vlc_lrand48()

VLC_EXPORT long vlc_lrand48 ( void  )

PRNG uniformly distributed between 0 and 2^32 - 1.

Note
Contrary to POSIX lrand48(), this function is thread-safe.
Warning
Series generated by this function are not reproducible. Use nrand48() if you need reproducible series.
Returns
an integral value within [0.0, 2^32-1] inclusive

References init_rand48(), nrand48(), rand48, vlc_mutex_lock(), and vlc_mutex_unlock().

◆ vlc_mrand48()

VLC_EXPORT long vlc_mrand48 ( void  )

PRNG uniformly distributed between -2^32 and 2^32 - 1.

Note
Contrary to POSIX mrand48(), this function is thread-safe.
Warning
Series generated by this function are not reproducible. Use jrand48() if you need reproducible series.
Returns
an integral value within [-2^32, 2^32-1] inclusive

References init_rand48(), jrand48(), rand48, vlc_mutex_lock(), and vlc_mutex_unlock().

Referenced by httpd_StreamCallBack().

◆ vlc_rand_bytes()

VLC_EXPORT void vlc_rand_bytes ( void *  buf,
size_t  len 
)