Changed 'tick' variables to 64 bit

- This fixes an issue with timers that stop working after about 24-49
  days when the tick overflows (note that this may happen much earlier
  than that, and at hard to predict times, on some systems)
- Updated the RDTSC help message in the configure script to also warn
  users about issues with SpeedStep enabled systems.
- On Windows, tick() still has a resolution of 10~15ms (or even as low
  as 100ms on some systems). A TODO comment (thanks, Ai4rei) was added
  for a follow-up patch, as I want this one to be as small as possible)
- Note: on Windows versions earlier than 6.x (Vista, Server 2008), the
  tick overflow issue is NOT fixed, since they don't support the
  function used to retrieve a 64 bit tick. This isn't a big issue, since
  those platforms are already - or going soon to be - out of their
  extended support period, and it's already advisable to upgrade, for
  other reasons. If you're the unfortunate user of such a system, it is
  recommended that you reboot your machine at least once every 49 days
  for Hercules to work reliably.
- Note: To clear some doubts, since I've already been asked, this has
  absolutely NOTHING to do with 32/64 bit CPUs or OSes. It's all about
  a variable's size, not the size of registers of your CPU, and your
  32bit CPU will be able to handle this just fine.

Signed-off-by: Haru <haru@dotalux.com>

1 files changed, 10 insertions, 4 deletions

diff --git a/configure b/configure
index abba75ea1..919d6f883 100755
--- a/configure
+++ b/configure
@@ -1,5 +1,5 @@
 #! /bin/sh
-# From configure.in d26927e.
+# From configure.in c4af60e.
 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.69.
 #
@@ -1333,9 +1333,15 @@ Optional Features:
                           in conjunction with XEN or Other Virtualization
                           mechanisms) Note: Please ensure that you've disabled
                           dynamic CPU-Frequencys, such as power saving
-                          options. (On the most modern Dedicated Servers
-                          cpufreq is preconfigured, see your distribution's
-                          manual how to disable it)
+                          options. (On most modern Dedicated Servers cpufreq
+                          is preconfigured, see your distribution's manual how
+                          to disable it). Furthermore, If your CPU has
+                          built-in CPU-Frequency scaling features (such as
+                          Intel's SpeedStep(R)), do not enable this option.
+                          Recent CPUs (Intel Core or newer) guarantee a fixed
+                          increment rate for their TSC, so it should be safe
+                          to use, but please doublecheck the documentation of
+                          both your CPU and OS before enabling this option.
   --enable-profiler=ARG   Profilers: no, gprof (disabled by default)
   --disable-64bit         Enforce 32bit output on x86_64 systems.
   --enable-lto            Enables or Disables Linktime Code Optimization (LTO