Make Timer a pure virtual interface and add a new subclass ANSI_Clock_Timer

which uses the ANSI/ISO clock function (previously this had been the
Timer::clock default implementation).

1 files changed, 18 insertions, 10 deletions

diff --git a/src/timer/timer.h b/src/timer/timer.h
index 9aa95f261..dfa04ee3a 100644
--- a/src/timer/timer.h
+++ b/src/timer/timer.h
@@ -1,7 +1,7 @@
-/*************************************************
-* Timestamp Functions Header File                *
-* (C) 1999-2007 Jack Lloyd                       *
-*************************************************/
+/**
+* Timestamp Functions Header File
+* (C) 1999-2008 Jack Lloyd
+*/
 
 #ifndef BOTAN_TIMERS_H__
 #define BOTAN_TIMERS_H__
@@ -10,23 +10,31 @@
 
 namespace Botan {
 
-/*************************************************
-* Timer Interface                                *
-*************************************************/
+/**
+* Timer Interface
+*/
 class BOTAN_DLL Timer : public EntropySource
    {
    public:
-      virtual u64bit clock() const;
+      virtual u64bit clock() const = 0;
       u32bit slow_poll(byte[], u32bit);
       u32bit fast_poll(byte[], u32bit);
 
-      std::string name() const { return "ANSI clock"; }
-
       virtual ~Timer() {}
    protected:
       static u64bit combine_timers(u32bit, u32bit, u32bit);
    };
 
+/**
+* ANSI Clock Timer
+*/
+class BOTAN_DLL ANSI_Clock_Timer : public Timer
+   {
+   public:
+      std::string name() const { return "ANSI clock"; }
+      u64bit clock() const;
+   };
+
 }
 
 #endif