/* Copyright (C) 1998-99 Martin Baulig

   This file is part of LibGTop 1.0.

   Contributed by Martin Baulig <martin@home-of-linux.org>, April 1998.

   LibGTop is free software; you can redistribute it and/or modify it

   under the terms of the GNU General Public License as published by

   the Free Software Foundation; either version 2 of the License,

   or (at your option) any later version.

   LibGTop is distributed in the hope that it will be useful, but WITHOUT

   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

   for more details.

   You should have received a copy of the GNU General Public License

   along with LibGTop; see the file COPYING. If not, write to the

   Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,

   Boston, MA 02110-1301, USA.

*/

#include <config.h>

#include <glibtop.h>

#include <glibtop/sem_limits.h>

#include <kvm.h>

#include <rctl.h>

#include <sys/sem.h>

static const struct nlist nlst[] = { {"glibtop_sem_limits"}, {NULL} };

#if GLIBTOP_SOLARIS_RELEASE < 51000

static const unsigned long _glibtop_sysdeps_sem_limits =

#if GLIBTOP_SOLARIS_RELEASE <= 50700

(1L << GLIBTOP_IPC_SEMMAP) +

#endif

(1L << GLIBTOP_IPC_SEMMNI) + (1L << GLIBTOP_IPC_SEMMNS) +

(1L << GLIBTOP_IPC_SEMMNU) + (1L << GLIBTOP_IPC_SEMMSL) +

(1L << GLIBTOP_IPC_SEMOPM) + (1L << GLIBTOP_IPC_SEMUME) +

(1L << GLIBTOP_IPC_SEMUSZ) + (1L << GLIBTOP_IPC_SEMVMX) +

(1L << GLIBTOP_IPC_SEMAEM);

#else

static const unsigned long _glibtop_sysdeps_sem_limits = 0;

#endif

/* Init function. */

void

_glibtop_init_sem_limits_p (glibtop *server)

{

#if GLIBTOP_SOLARIS_RELEASE < 51000

   	kvm_t *kd = server->machine->kd;

	if(kd && !kvm_nlist(kd, nlst))

		server->sysdeps.sem_limits = _glibtop_sysdeps_sem_limits;

	else

	   	server->sysdeps.sem_limits = 0;

#endif

}

/* Provides information about sysv sem limits. */

void

glibtop_get_sem_limits_p (glibtop *server, glibtop_sem_limits *buf)

{

#if GLIBTOP_SOLARIS_RELEASE < 51000

   	kvm_t *kd = server->machine->kd;

        glibtop_sem_limits sinfo;

	memset (buf, 0, sizeof (glibtop_sem_limits));

	if(!(server->sysdeps.sem_limits))

	   	return;

	if(kvm_read(kd, nlst[0].n_value, (void *)&sinfo,

                    sizeof(glibtop_sem_limits)) != sizeof(glibtop_sem_limits))

	   	return;

#if GLIBTOP_SOLARIS_RELEASE <= 50700

	/* This field don't exist anymore in Solaris 8.

	 * Thanks to Laszlo PETER <Laszlo.Peter@ireland.sun.com>. */

	buf->semmap = sinfo.semmap;

#endif

	buf->semmni = sinfo.semmni;

	buf->semmns = sinfo.semmns;

	buf->semmnu = sinfo.semmnu;

	buf->semmsl = sinfo.semmsl;

	buf->semopm = sinfo.semopm;

	buf->semume = sinfo.semume;

	buf->semusz = sinfo.semusz;

	buf->semvmx = sinfo.semvmx;

	buf->semaem = sinfo.semaem;

#endif

#if GLIBTOP_SOLARIS_RELEASE >= 51000

       rctlblk_t *rblk;

       if ((rblk = malloc(rctlblk_size())) == NULL)

               return;

       if (getrctl("process.max-sem-ops", NULL, rblk, RCTL_FIRST) == -1)

               return;

       else

               buf->semopm = rctlblk_get_value(rblk);

       if (getrctl("process.max-sem-nsems", NULL, rblk, RCTL_FIRST) == -1)

               return;

       else

               buf->semmsl = rctlblk_get_value(rblk);

       if (getrctl("project.max-sem-ids", NULL, rblk, RCTL_FIRST) == -1)

               return;

       else

               buf->semmni = rctlblk_get_value(rblk);

	/* there are only 3 fields, the remaining ones have been obsoleted in S10

	 and no longer have system-wide limits */

#endif

       buf->flags = _glibtop_sysdeps_sem_limits;

}