X-Git-Url: https://unix4lyfe.org/gitweb/darkstat-debian/blobdiff_plain/53d9d497ad0dcb0c37efb23a5468762355db6512..HEAD:/now.c

diff --git a/now.c b/now.c
index f0751a8..b1a43cb 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.
  *
@@ -17,57 +17,58 @@
  */
 #include "err.h"
 #include "now.h"
+#include "str.h"
 
 #include <assert.h>
 #include <string.h>
 #include <time.h>
 
-#ifdef __MACH__
+#if defined(__MACH__) && !defined(__gnu_hurd__)
 /* Fake up clock_gettime() on OS X. */
-# include <sys/time.h>
-# include <inttypes.h>
-# include <mach/mach.h>
-# include <mach/mach_time.h>
-
-typedef int clockid_t;
-#define CLOCK_REALTIME 0
-#define CLOCK_MONOTONIC 1
-
-static uint64_t mono_first = 0;
-
-int clock_gettime(clockid_t clk_id, struct timespec *tp) {
-   if (clk_id == CLOCK_REALTIME) {
-      struct timeval tv;
-      gettimeofday(&tv, NULL);
-      tp->tv_sec = tv.tv_sec;
-      tp->tv_nsec = tv.tv_usec * 1000;
-      return 0;
-   }
-   if (clk_id == CLOCK_MONOTONIC) {
-      uint64_t t = mach_absolute_time();
-      mach_timebase_info_data_t timebase;
-      mach_timebase_info(&timebase);
-      if (!mono_first) {
-         mono_first = t;
+#  include <sys/time.h>
+#  include <inttypes.h>
+#  include <mach/mach.h>
+#  include <mach/mach_time.h>
+
+   typedef int clockid_t;
+#  define CLOCK_REALTIME 0
+#  define CLOCK_MONOTONIC 1
+
+   static uint64_t mono_first = 0;
+
+   int clock_gettime(clockid_t clk_id, struct timespec *tp) {
+      if (clk_id == CLOCK_REALTIME) {
+         struct timeval tv;
+         gettimeofday(&tv, NULL);
+         tp->tv_sec = tv.tv_sec;
+         tp->tv_nsec = tv.tv_usec * 1000;
+         return 0;
+      }
+      if (clk_id == CLOCK_MONOTONIC) {
+         uint64_t t = mach_absolute_time();
+         mach_timebase_info_data_t timebase;
+         mach_timebase_info(&timebase);
+         if (!mono_first) {
+            mono_first = t;
+         }
+         uint64_t tdiff = (t - mono_first) * timebase.numer / timebase.denom;
+         tp->tv_sec = tdiff / 1000000000;
+         tp->tv_nsec = tdiff % 1000000000;
+         return 0;
       }
-      uint64_t tdiff = (t - mono_first) * timebase.numer / timebase.denom;
-      tp->tv_sec = tdiff / 1000000000;
-      tp->tv_nsec = tdiff % 1000000000;
-      return 0;
+      return -1;
    }
-   return -1;
-}
 #endif  /* __MACH__ */
 
 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));
 }
@@ -113,14 +120,14 @@ void now_update(void) {
    all_clocks_update();
 }
 
-long mono_to_real(const long t) {
+time_t mono_to_real(const int64_t t) {
    assert(now_initialized);
-   return t - clock_mono.tv_sec + clock_real.tv_sec;
+   return (time_t)(t - (int64_t)clock_mono.tv_sec + (int64_t)clock_real.tv_sec);
 }
 
-long real_to_mono(const long t) {
+int64_t real_to_mono(const time_t t) {
    assert(now_initialized);
-   return t - clock_real.tv_sec + clock_mono.tv_sec;
+   return (int64_t)(t - clock_real.tv_sec + clock_mono.tv_sec);
 }
 
 void timer_start(struct timespec *t) {
@@ -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: */