mirror of
git://sourceware.org/git/lvm2.git
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131 lines
2.6 KiB
C
131 lines
2.6 KiB
C
/*
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* Copyright (C) 2006 Rackable Systems All rights reserved.
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*
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* This file is part of LVM2.
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*
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* This copyrighted material is made available to anyone wishing to use,
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* modify, copy, or redistribute it subject to the terms and conditions
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* of the GNU Lesser General Public License v.2.1.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/*
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* Abstract out the time methods used so they can be adjusted later -
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* the results of these routines should stay in-core. This implementation
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* requires librt.
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*/
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#include "lib.h"
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#include <stdlib.h>
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#include "timestamp.h"
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/*
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* The realtime section uses clock_gettime with the CLOCK_MONOTONIC
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* parameter to prevent issues with time warps
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*/
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#ifdef HAVE_REALTIME
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#include <time.h>
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#include <bits/time.h>
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struct timestamp {
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struct timespec t;
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};
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struct timestamp *get_timestamp(void)
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{
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struct timestamp *ts = NULL;
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if (!(ts = dm_malloc(sizeof(*ts))))
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return_NULL;
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if (clock_gettime(CLOCK_MONOTONIC, &ts->t)) {
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log_sys_error("clock_gettime", "get_timestamp");
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return NULL;
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}
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return ts;
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}
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/* cmp_timestamp: Compare two timestamps
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*
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* Return: -1 if t1 is less than t2
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* 0 if t1 is equal to t2
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* 1 if t1 is greater than t2
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*/
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int cmp_timestamp(struct timestamp *t1, struct timestamp *t2)
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{
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if(t1->t.tv_sec < t2->t.tv_sec)
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return -1;
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if(t1->t.tv_sec > t2->t.tv_sec)
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return 1;
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if(t1->t.tv_nsec < t2->t.tv_nsec)
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return -1;
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if(t1->t.tv_nsec > t2->t.tv_nsec)
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return 1;
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return 0;
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}
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#else /* ! HAVE_REALTIME */
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/*
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* The !realtime section just uses gettimeofday and is therefore subject
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* to ntp-type time warps - not sure if should allow that.
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*/
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#include <sys/time.h>
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struct timestamp {
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struct timeval t;
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};
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struct timestamp *get_timestamp(void)
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{
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struct timestamp *ts = NULL;
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if (!(ts = dm_malloc(sizeof(*ts))))
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return_NULL;
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if (gettimeofday(&ts->t, NULL)) {
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log_sys_error("gettimeofday", "get_timestamp");
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return NULL;
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}
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return ts;
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}
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/* cmp_timestamp: Compare two timestamps
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*
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* Return: -1 if t1 is less than t2
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* 0 if t1 is equal to t2
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* 1 if t1 is greater than t2
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*/
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int cmp_timestamp(struct timestamp *t1, struct timestamp *t2)
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{
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if(t1->t.tv_sec < t2->t.tv_sec)
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return -1;
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if(t1->t.tv_sec > t2->t.tv_sec)
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return 1;
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if(t1->t.tv_usec < t2->t.tv_usec)
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return -1;
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if(t1->t.tv_usec > t2->t.tv_usec)
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return 1;
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return 0;
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}
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#endif /* HAVE_REALTIME */
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void destroy_timestamp(struct timestamp *t)
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{
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if (t)
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dm_free(t);
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}
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