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79 lines
1.5 KiB
C
79 lines
1.5 KiB
C
/*
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* Copyright (c) 1999-2000 Proofpoint, Inc. and its suppliers.
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* All rights reserved.
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*
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* By using this file, you agree to the terms and conditions set
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* forth in the LICENSE file which can be found at the top level of
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* the sendmail distribution.
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*
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* Contributed by Exactis.com, Inc.
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*
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*/
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#include <sm/gen.h>
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SM_RCSID("@(#)$Id: shmticklib.c,v 8.15 2013-11-22 20:51:56 ca Exp $")
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#if _FFR_SHM_STATUS
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# include <sys/types.h>
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# include <sys/ipc.h>
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# include <sys/shm.h>
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# include "statusd_shm.h"
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/*
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** SHMTICK -- increment a shared memory variable
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**
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** Parameters:
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** inc_me -- identity of shared memory segment
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** what -- which variable to increment
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**
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** Returns:
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** none
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*/
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void
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shmtick(inc_me, what)
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int inc_me;
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int what;
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{
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static int shmid = -1;
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static STATUSD_SHM *sp = (STATUSD_SHM *)-1;
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static unsigned int cookie = 0;
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if (shmid < 0)
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{
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int size = sizeof(STATUSD_SHM);
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shmid = shmget(STATUSD_SHM_KEY, size, 0);
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if (shmid < 0)
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return;
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}
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if ((unsigned long *) sp == (unsigned long *)-1)
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{
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sp = (STATUSD_SHM *) shmat(shmid, NULL, 0);
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if ((unsigned long *) sp == (unsigned long *) -1)
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return;
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}
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if (sp->magic != STATUSD_MAGIC)
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{
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/*
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** possible race condition, wait for
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** statusd to initialize.
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*/
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return;
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}
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if (what >= STATUSD_LONGS)
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what = STATUSD_LONGS - 1;
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if (inc_me >= STATUSD_LONGS)
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inc_me = STATUSD_LONGS - 1;
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if (sp->ul[STATUSD_COOKIE] != cookie)
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{
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cookie = sp->ul[STATUSD_COOKIE];
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++(sp->ul[inc_me]);
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}
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++(sp->ul[what]);
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}
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#endif /* _FFR_SHM_STATUS */
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