1 files changed, 129 insertions, 0 deletions
diff --git a/libglusterfs/src/timespec.c b/libglusterfs/src/timespec.c
new file mode 100644
index 00000000000..96cef5c6f07
--- /dev/null
+++ b/libglusterfs/src/timespec.c
@@ -0,0 +1,129 @@
+/*
+  Copyright (c) 2013 Red Hat, Inc. <http://www.redhat.com>
+  This file is part of GlusterFS.
+
+  This file is licensed to you under your choice of the GNU Lesser
+  General Public License, version 3 or any later version (LGPLv3 or
+  later), or the GNU General Public License, version 2 (GPLv2), in all
+  cases as published by the Free Software Foundation.
+*/
+
+#include <stdio.h>
+#include <inttypes.h>
+#include <time.h>
+#include <sys/time.h>
+#include <string.h>
+
+#if defined GF_DARWIN_HOST_OS
+#include <mach/mach_time.h>
+static mach_timebase_info_data_t gf_timebase;
+#endif
+
+#include "glusterfs/timespec.h"
+#include "glusterfs/libglusterfs-messages.h"
+#include "glusterfs/common-utils.h"
+
+void
+timespec_now(struct timespec *ts)
+{
+#if defined GF_LINUX_HOST_OS || defined GF_SOLARIS_HOST_OS ||                  \
+    defined GF_BSD_HOST_OS
+    if (0 == clock_gettime(CLOCK_MONOTONIC, ts)) {
+        /* All good */
+        return;
+    }
+
+    /* Fall back, but there is hope in gettimeofday() syscall */
+    struct timeval tv;
+    if (0 == gettimeofday(&tv, NULL)) {
+        /* Again, all good */
+        TIMEVAL_TO_TIMESPEC(&tv, ts);
+        return;
+    }
+
+    /* If control hits here, there is surely a problem,
+       mainly because, as per man page too, these syscalls
+       shouldn't fail. Best way is to ABORT, because it is
+       not right */
+    GF_ABORT("gettimeofday() failed!!");
+
+#elif defined GF_DARWIN_HOST_OS
+    uint64_t time = mach_absolute_time();
+    static double scaling = 0.0;
+
+    if (mach_timebase_info(&gf_timebase) != KERN_SUCCESS) {
+        gf_timebase.numer = 1;
+        gf_timebase.denom = 1;
+    }
+    if (gf_timebase.denom == 0) {
+        gf_timebase.numer = 1;
+        gf_timebase.denom = 1;
+    }
+
+    scaling = (double)gf_timebase.numer / (double)gf_timebase.denom;
+    time *= scaling;
+
+    ts->tv_sec = (time * NANO);
+    ts->tv_nsec = (time - (ts->tv_sec * GIGA));
+
+#endif /* Platform verification */
+}
+
+void
+timespec_now_realtime(struct timespec *ts)
+{
+#if defined GF_LINUX_HOST_OS || defined GF_SOLARIS_HOST_OS ||                  \
+    defined GF_BSD_HOST_OS
+    if (0 == clock_gettime(CLOCK_REALTIME, ts)) {
+        return;
+    }
+#endif
+
+    /* Fall back to gettimeofday()*/
+    struct timeval tv = {
+        0,
+    };
+    if (0 == gettimeofday(&tv, NULL)) {
+        TIMEVAL_TO_TIMESPEC(&tv, ts);
+        return;
+    }
+
+    return;
+}
+
+void
+timespec_adjust_delta(struct timespec *ts, struct timespec delta)
+{
+    ts->tv_nsec = ((ts->tv_nsec + delta.tv_nsec) % 1000000000);
+    ts->tv_sec += ((ts->tv_nsec + delta.tv_nsec) / 1000000000);
+    ts->tv_sec += delta.tv_sec;
+}
+
+void
+timespec_sub(const struct timespec *begin, const struct timespec *end,
+             struct timespec *res)
+{
+    if (end->tv_nsec < begin->tv_nsec) {
+        res->tv_sec = end->tv_sec - begin->tv_sec - 1;
+        res->tv_nsec = end->tv_nsec + 1000000000 - begin->tv_nsec;
+    } else {
+        res->tv_sec = end->tv_sec - begin->tv_sec;
+        res->tv_nsec = end->tv_nsec - begin->tv_nsec;
+    }
+}
+
+int
+timespec_cmp(const struct timespec *lhs_ts, const struct timespec *rhs_ts)
+{
+    if (lhs_ts->tv_sec < rhs_ts->tv_sec) {
+        return -1;
+    } else if (lhs_ts->tv_sec > rhs_ts->tv_sec) {
+        return 1;
+    } else if (lhs_ts->tv_nsec < rhs_ts->tv_nsec) {
+        return -1;
+    } else if (lhs_ts->tv_nsec > rhs_ts->tv_nsec) {
+        return 1;
+    }
+
+    return 0;
+}