X-Git-Url: https://unix4lyfe.org/gitweb/darkstat-debian/blobdiff_plain/85d7d6e7b81dff84df8ddc87815ce77b8d82bc07..3c6b3682c70be84db86e70c191016913a9836c31:/now.c

diff --git a/now.c b/now.c
index f0751a8..95ab2a2 100644
--- a/now.c
+++ b/now.c
@@ -1,5 +1,5 @@
 /* darkstat 3
- * copyright (c) 2012 Emil Mikulic.
+ * copyright (c) 2012-2014 Emil Mikulic.
  *
  * now.c: a cache of the current time.
  *
@@ -17,12 +17,13 @@
  */
 #include "err.h"
 #include "now.h"
+#include "str.h"
 
 #include <assert.h>
 #include <string.h>
 #include <time.h>
 
-#ifdef __MACH__
+#ifdef __APPLE__
 /* Fake up clock_gettime() on OS X. */
 # include <sys/time.h>
 # include <inttypes.h>
@@ -62,12 +63,12 @@ int clock_gettime(clockid_t clk_id, struct timespec *tp) {
 static struct timespec clock_real, clock_mono;
 static int now_initialized = 0;
 
-long now_real(void) {
+time_t now_real(void) {
    assert(now_initialized);
    return clock_real.tv_sec;
 }
 
-long now_mono(void) {
+time_t now_mono(void) {
    assert(now_initialized);
    return clock_mono.tv_sec;
 }
@@ -80,6 +81,17 @@ static int before(const struct timespec *a, const struct timespec *b) {
    return 0;
 }
 
+static void warn_backwards(const char *name,
+                           const struct timespec * const t0,
+                           const struct timespec * const t1) {
+   verbosef("%s clock went backwards from %lld.%09lld to %lld.%09lld",
+            name,
+            (lld)t0->tv_sec,
+            (lld)t0->tv_nsec,
+            (lld)t1->tv_sec,
+            (lld)t1->tv_nsec);
+}
+
 static void clock_update(const clockid_t clk_id,
                          struct timespec *dest,
                          const char *name) {
@@ -87,12 +99,7 @@ static void clock_update(const clockid_t clk_id,
 
    clock_gettime(clk_id, &t);
    if (now_initialized && before(&t, dest)) {
-      verbosef("%s clock went backwards from %ld.%09ld to %ld.%09ld",
-               name,
-               (long)dest->tv_sec,
-               (long)dest->tv_nsec,
-               (long)t.tv_sec,
-               (long)t.tv_nsec);
+      warn_backwards(name, &t, dest);
    }
    memcpy(dest, &t, sizeof(t));
 }
@@ -113,12 +120,12 @@ void now_update(void) {
    all_clocks_update();
 }
 
-long mono_to_real(const long t) {
+time_t mono_to_real(const time_t t) {
    assert(now_initialized);
    return t - clock_mono.tv_sec + clock_real.tv_sec;
 }
 
-long real_to_mono(const long t) {
+time_t real_to_mono(const time_t t) {
    assert(now_initialized);
    return t - clock_real.tv_sec + clock_mono.tv_sec;
 }
@@ -133,20 +140,24 @@ static int64_t ts_diff(const struct timespec * const a,
           a->tv_nsec - b->tv_nsec;
 }
 
-void timer_stop(const struct timespec * const t,
+void timer_stop(const struct timespec * const t0,
                 const int64_t nsec,
                 const char *warning) {
-   struct timespec t2;
+   struct timespec t1;
    int64_t diff;
 
-   clock_gettime(CLOCK_MONOTONIC, &t2);
-   diff = ts_diff(&t2, t);
-   assert(diff > 0);
-   if (diff > nsec)
+   clock_gettime(CLOCK_MONOTONIC, &t1);
+   if (before(&t1, t0)) {
+      warn_backwards("monotonic timer", t0, &t1);
+      return;
+   }
+   diff = ts_diff(&t1, t0);
+   if (diff > nsec) {
       warnx("%s (took %lld nsec, over threshold of %lld nsec)",
             warning,
-            (long long)diff,
-            (long long)nsec);
+            (lld)diff,
+            (lld)nsec);
+   }
 }
 
 /* vim:set ts=3 sw=3 tw=80 et: */