Import Geant4 0.0.0 source tree

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+// This code implementation is the intellectual property of
+// the RD44 GEANT4 collaboration.
+//
+// By copying, distributing or modifying the Program (or any work
+// based on the Program) you indicate your acceptance of this statement,
+// and all its terms.
+//
+// $Id: G4BlockingList.hh,v 2.1 1998/07/12 02:58:14 urbi Exp $
+// GEANT4 tag $Name: geant4-00 $
+//
+// class G4BlockingList
+//
+// A utility class responsible for (efficiently) maintaining a List 
+// of blocked volume numbers, with rapid `reset' operations.
+//
+// Member functions:
+// 
+// G4BlockingList(G4int maxDefault=511,G4int stride=512)
+// 
+// 	Create empty blocking List of default size and `stride' resize
+//      count.
+//
+// ~G4BlockingList()
+//
+// Reset()
+//
+//	Efficiently `Reset' the blocking List, so that no volumes
+//      are blocked
+//      [Advance tag no and only fully clear List if tag max reached]
+//
+// FullyReset()
+//
+//      Clear the blocking List and reset tag value [slow]
+//
+// Enlarge(G4int nv)
+//
+//      Enlarges blocking List is current size < nv, in units of stride
+//      Clears the new part of the List
+//
+// G4int Length()
+//     
+//      Returns the current length of the List. Note a length of 16
+//      means volumes of indices between 0 & 15 inclusive may be blocked
+// 
+// void BlockVolume(G4int v)
+//
+// 	Block the volume number v. Requires: 0<=v<Length()
+//
+// G4bool IsBlocked(G4int v)
+//
+//      Return true if the volume number v is blocked, else false
+//      Requires: 0<=v<Length()
+//
+// Notes:
+//
+// Implemented via a ValVector of ints: a tag value is used to set
+// the indices of blocked volumes. On reset the current tag value is
+// increases, so that the ValVector must only be zeroed when the
+// numerical range of the tag is used.
+//
+// History:
+//
+// 24.7.96 P.Kent Separated from G4Navigator
+
+#ifndef G4BLOCKINGLIST_HH
+#define G4BLOCKINGLIST_HH
+
+#include "globals.hh"
+#include <rw/tvvector.h>
+
+const G4int kBlockingListMaxDefault = 500; // Block up to 511 daughters
+				           // initially
+const G4int kBlockingListStride = 128;
+const G4int kBlockTagNoMax = 2147483647;   // 2^31-1 maximum tag no may reach
+
+class G4BlockingList
+{
+public:
+	G4BlockingList(G4int maxDefault=kBlockingListMaxDefault,
+                       G4int stride=kBlockingListStride);
+	~G4BlockingList();
+	void Reset();
+	void FullyReset();
+	void Enlarge(const G4int nv);
+	G4int Length() const;
+	void BlockVolume(const G4int v);
+	G4bool IsBlocked(const G4int v) const;
+
+private:
+// Current blocked volume tag no.
+	G4int fBlockTagNo,fStride;		
+// Blocked volumes: Elements with indices
+// corresponding to blocked volume set to fBlockTagNo
+    	RWTValVector<G4int> fBlockingList; 
+	
+};
+
+#include "G4BlockingList.icc"
+
+#endif