faf6d4dc93
The earlier attempt at protecting these functions from
already freed memory worked just fine until the memory
was, in fact, reused by the OS. At that point, the ref
count would most likely fail an existing a test for 0.
So this commit will take control of the 'info' pointer
and force it to NULL when a reference count reaches 0.
Plus, since it makes little sense returning an address
that a caller already has, henceforth we will return a
reference count out of the 'ref' and 'unref functions.
Reference(s):
commit 74beff80ff
Signed-off-by: Jim Warner <james.warner@comcast.net>
92 lines
2.8 KiB
C
92 lines
2.8 KiB
C
/*
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* libprocps - Library to read proc filesystem
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef PROC_READ_STAT_H
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#define PROC_READ_STAT_H
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#include <proc/procps.h>
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__BEGIN_DECLS
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enum procps_cpu_item {
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PROCPS_CPU_USER,
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PROCPS_CPU_NICE,
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PROCPS_CPU_SYSTEM,
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PROCPS_CPU_IDLE,
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PROCPS_CPU_IOWAIT,
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PROCPS_CPU_IRQ,
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PROCPS_CPU_SIRQ,
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PROCPS_CPU_STOLEN,
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PROCPS_CPU_GUEST,
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PROCPS_CPU_GNICE
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};
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enum procps_stat_item {
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PROCPS_STAT_INTR,
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PROCPS_STAT_CTXT,
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PROCPS_STAT_BTIME,
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PROCPS_STAT_PROCS,
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PROCPS_STAT_PROCS_BLK,
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PROCPS_STAT_PROCS_RUN
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};
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typedef unsigned long long jiff;
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struct procps_cpu_result {
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enum procps_cpu_item item;
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jiff result;
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struct procps_cpu_result *next;
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};
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struct procps_jiffs {
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jiff user, nice, system, idle, iowait, irq, sirq, stolen, guest, gnice;
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};
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struct procps_jiffs_hist {
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struct procps_jiffs new;
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struct procps_jiffs old;
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int id;
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};
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struct procps_sys_result {
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enum procps_stat_item item;
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int result;
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struct procps_sys_result *next;
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};
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struct procps_statinfo;
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int procps_stat_new (struct procps_statinfo **info);
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int procps_stat_read (struct procps_statinfo *info, const int cpu_only);
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int procps_stat_read_jiffs (struct procps_statinfo *info);
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int procps_stat_ref (struct procps_statinfo *info);
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int procps_stat_unref (struct procps_statinfo **info);
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jiff procps_stat_get_cpu (struct procps_statinfo *info, enum procps_cpu_item item);
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int procps_stat_get_cpu_chain (struct procps_statinfo *info, struct procps_cpu_result *item);
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int procps_stat_get_jiffs (struct procps_statinfo *info, struct procps_jiffs *item, int which);
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int procps_stat_get_jiffs_all (struct procps_statinfo *info, struct procps_jiffs *item, int numitems);
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int procps_stat_get_jiffs_hist (struct procps_statinfo *info, struct procps_jiffs_hist *item, int which);
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int procps_stat_get_jiffs_hist_all (struct procps_statinfo *info, struct procps_jiffs_hist *item, int numitems);
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unsigned int procps_stat_get_sys (struct procps_statinfo *info, enum procps_stat_item item);
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int procps_stat_get_sys_chain (struct procps_statinfo *info, struct procps_sys_result *item);
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__END_DECLS
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#endif
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