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/*
* Copyright (c) 1999-2000 Sendmail, Inc. and its suppliers.
* All rights reserved.
*
* By using this file, you agree to the terms and conditions set
* forth in the LICENSE file which can be found at the top level of
* the sendmail distribution.
*
* Contributed by Exactis.com, Inc.
*
*/
#ifndef lint
static char id[] = "@(#)$Id: shmticklib.c,v 8.6 2000/02/26 01:32:27 gshapiro Exp $";
#endif /* ! lint */
#if _FFR_SHM_STATUS
# if SFIO
# include <sfio/stdio.h>
# else /* !SFIO */
# include <stdio.h>
# endif /* SFIO */
# include <sys/types.h>
# include <sys/ipc.h>
# include <sys/shm.h>
# include "statusd_shm.h"
/*
** SHMTICK -- increment a shared memory variable
**
** Parameters:
** inc_me -- identity of shared memory segment
** what -- which variable to increment
**
** Returns:
** none
*/
void
shmtick(inc_me, what)
int inc_me;
int what;
{
static int shmid = -1;
static STATUSD_SHM *sp = (STATUSD_SHM *)-1;
static unsigned int cookie = 0;
if (shmid < 0)
{
int size = sizeof(STATUSD_SHM);
shmid = shmget(STATUSD_SHM_KEY, size, 0);
if (shmid < 0)
return;
}
if ((unsigned long *)sp == (unsigned long *)-1)
{
sp = (STATUSD_SHM *)shmat(shmid, NULL, 0);
if ((unsigned long *)sp == (unsigned long *)-1)
return;
}
if (sp->magic != STATUSD_MAGIC)
{
/*
** possible race condition, wait for
** statusd to initialize.
*/
return;
}
if (what >= STATUSD_LONGS)
what = STATUSD_LONGS - 1;
if (inc_me >= STATUSD_LONGS)
inc_me = STATUSD_LONGS - 1;
if (sp->ul[STATUSD_COOKIE] != cookie)
{
cookie = sp->ul[STATUSD_COOKIE];
++(sp->ul[inc_me]);
}
++(sp->ul[what]);
}
#endif /* _FFR_SHM_STATUS */
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