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uihashinit (9)

>> uihashinit (9) ( FreeBSD man: Ядро )

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NAME



uidinfo

 
uihashinit

 
uifind

 
uihold

 
uifree

 - functions for managing UID information

SYNOPSIS

   #include <sys/param.h>
   #include <sys/proc.h>
   #include <sys/resourcevar.h>
void uihashinit (void);
struct uidinfo * uifind (uid_t uid);
void uihold (struct uidinfo *uip);
void uifree (struct uidinfo *uip);

DESCRIPTION

The family of functions is used to manage Vt uidinfo structures. Each Vt uidinfo structure maintains per uid resource consumption counts, including the process count and socket buffer space usage.

The uihashinit ();
function initializes the Vt uidinfo hash table and its mutex. This function should only be called during system initialization.

The uifind ();
function looks up and returns the Vt uidinfo structure for Fa uid . If no Vt uidinfo structure exists for Fa uid , a new structure will be allocated and initialized. The hash mutex is acquired and released.

The uihold ();
function increases the reference count on Fa uip . Fa uip Ns 's lock is acquired and released.

The uifree ();
function decreases the reference count on Fa uip , and if the count reaches 0 Fa uip is freed. Fa uip Ns 's lock is acquired and release and the uidinfo hash mutex may be acquired and released.

RETURN VALUES

uifind ();
returns a pointer to an initialized Vt uidinfo structure, and should not fail.

AUTHORS

This manual page was written by An Chad David Aq davidc@acns.ab.ca .

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