Consolidate the non-canonical epoch timers, like cpuid and Win32's

QueryPerformanceCounter, into an entropy source hres_timer. Its
results, if any, do not count as contributing entropy to the poll.

Convert the other (monotonic/fixed epoch) timers to a single function
get_nanoseconds_clock(), living in time.h, which statically chooses
the 'best' timer type (clock_gettime, gettimeofday, std::clock, in
that order depending on what is available). Add feature test macros
for clock_gettime and gettimeofday.

Remove the Timer class and timer.h. Remove the Timer& argument to the
algorithm benchmark function.

1 files changed, 27 insertions, 0 deletions

diff --git a/src/entropy/hres_timer/hres_timer.h b/src/entropy/hres_timer/hres_timer.h
new file mode 100644
index 000000000..8dfbfc2d7
--- /dev/null
+++ b/src/entropy/hres_timer/hres_timer.h
@@ -0,0 +1,27 @@
+/*
+* High Resolution Timestamp Entropy Source
+* (C) 1999-2009 Jack Lloyd
+*
+* Distributed under the terms of the Botan license
+*/
+
+#ifndef BOTAN_ENTROPY_SRC_HRES_TIMER_H__
+#define BOTAN_ENTROPY_SRC_HRES_TIMER_H__
+
+#include <botan/entropy_src.h>
+
+namespace Botan {
+
+/*
+* High Resolution Timestamp Source
+*/
+class BOTAN_DLL High_Resolution_Timestamp : public EntropySource
+   {
+   public:
+      std::string name() const { return "High Resolution Timestamp"; }
+      void poll(Entropy_Accumulator& accum);
+   };
+
+}
+
+#endif