Martin Baulig
a5dd7e9063
It changes the return values of all sysdeps functions which were previosly returning void to int. This is the first step to implement better error handling in LibGTop. Martin 1999-10-24 Martin Baulig <martin@home-of-linux.org> * include/glibtop/*.h (glibtop_get_*, glibtop_init*): Changed the return value of all `glibtop_get_<feature>_* ()' and all `glibtop_init_<feature>_* ()' functions from void to int. * features.def: Reflect changes of the return values. * sysdeps/*/*.c: Reflect changes of the return values.
108 lines
3.0 KiB
C
108 lines
3.0 KiB
C
/* $Id$ */
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/* Copyright (C) 1998-99 Martin Baulig
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This file is part of LibGTop 1.0.
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Contributed by Martin Baulig <martin@home-of-linux.org>, April 1998.
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LibGTop is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License,
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or (at your option) any later version.
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LibGTop is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with LibGTop; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA.
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*/
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#include <glibtop.h>
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#include <glibtop/cpu.h>
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#include <glibtop_suid.h>
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static const unsigned long _glibtop_sysdeps_cpu =
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(1L << GLIBTOP_CPU_TOTAL) + (1L << GLIBTOP_CPU_USER) +
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(1L << GLIBTOP_CPU_NICE) + (1L << GLIBTOP_CPU_SYS) +
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(1L << GLIBTOP_CPU_IDLE) + (1L << GLIBTOP_CPU_FREQUENCY);
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/* Provides information about cpu usage. */
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int
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glibtop_get_cpu_p (glibtop *server, glibtop_cpu *buf)
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{
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long cp_time [CPUSTATES], mp_time [NCPU][CPUSTATES];
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int i;
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glibtop_init_p (server, (1L << GLIBTOP_SYSDEPS_CPU), 0);
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memset (buf, 0, sizeof (glibtop_cpu));
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/* !!! THE FOLLOWING CODE RUNS SGID KMEM - CHANGE WITH CAUTION !!! */
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glibtop_suid_enter (server);
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/* get the cp_time array */
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(void) _glibtop_getkval (server, _glibtop_nlist [X_CP_TIME].n_value,
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(int *) cp_time, sizeof (cp_time),
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_glibtop_nlist [X_CP_TIME].n_name);
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#ifdef MULTIPROCESSOR
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/* get the mp_time array as well */
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if (server->machine.ncpu > 1) {
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(void) _glibtop_getkval (server, _glibtop_nlist [X_MP_TIME].n_value,
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(int *) mp_time, sizeof (mp_time),
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_glibtop_nlist [X_MP_TIME].n_name);
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}
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#endif
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glibtop_suid_leave (server);
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/* !!! END OF SUID ROOT PART !!! */
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#ifdef MULTIPROCESSOR
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/* If we have multiple processors, we add the times for each of them
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* and set frequency to 100 times the number of the processors. */
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/* [FIXME]: I had no machine with more than one processor to test
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* this code !!! */
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if (server->machine.ncpu > 1) {
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for (i = 0; i < server->machine.ncpu; i++) {
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buf->user += mp_time [i][CP_USER];
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buf->nice += mp_time [i][CP_NICE];
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buf->sys += mp_time [i][CP_SYS];
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buf->idle += mp_time [i][CP_IDLE];
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buf->frequency += 100;
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}
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} else {
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buf->user = cp_time [CP_USER];
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buf->nice = cp_time [CP_NICE];
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buf->sys = cp_time [CP_SYS];
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buf->idle = cp_time [CP_IDLE];
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buf->frequency = 100;
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}
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#else
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buf->user = cp_time [CP_USER];
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buf->nice = cp_time [CP_NICE];
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buf->sys = cp_time [CP_SYS];
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buf->idle = cp_time [CP_IDLE];
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buf->frequency = 100;
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#endif
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/* Calculate total time. */
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buf->total = buf->user + buf->nice + buf->sys + buf->idle;
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/* Now we can set the flags. */
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buf->flags = _glibtop_sysdeps_cpu;
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}
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