libgo/runtime/go-nanotime.c

   1 // Copyright 2009 The Go Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style
   3 // license that can be found in the LICENSE file.
   4
   5 // Return time in nanoseconds.  This is only used for computing runtime.
   6
   7 #include <sys/time.h>
   8
   9 #include "go-assert.h"
  10 #include "runtime.h"
  11
  12 int64
  13 runtime_nanotime (void)
  14 {
  15   int i;
  16   struct timeval tv;
  17
  18   i = gettimeofday (&tv, NULL);
  19   __go_assert (i == 0);
  20
  21   return (int64) tv.tv_sec * 1000000000 + (int64) tv.tv_usec * 1000;
  22 }