Gabriele Cosmo
279 lines
9.8 KiB
C++
279 lines
9.8 KiB
C++
//
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// ********************************************************************
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// * DISCLAIMER *
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// * *
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// * The following disclaimer summarizes all the specific disclaimers *
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// * of contributors to this software. The specific disclaimers,which *
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// * govern, are listed with their locations in: *
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// * http://cern.ch/geant4/license *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. *
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// * *
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// * This code implementation is the intellectual property of the *
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// * GEANT4 collaboration. *
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// * By copying, distributing or modifying the Program (or any work *
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// * based on the Program) you indicate your acceptance of this *
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// * statement, and all its terms. *
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// ********************************************************************
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//
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// $Id: ParMarshaledObj.hh,v 1.1 2002/03/05 15:21:58 gcosmo Exp $
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// GEANT4 tag $Name: geant4-05-02-patch-01 $
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//
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// --------------------------------------------------------------------
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// Parallel Library for Geant4
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//
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// Gene Cooperman <gene@ccs.neu.edu>, 2001
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// --------------------------------------------------------------------
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#ifndef ParMarshaledObj_h
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#define ParMarshaledObj_h 1
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#include <stdlib.h>
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#include <string.h>
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#include <iostream>
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// Geant4 types; Which of these is the official one? G4types.hh or globals.hh
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// G4types.hh included from G4ios.hh
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#include "G4Event.hh"
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#include "globals.hh"
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// A MarshaledObj is conceptually a
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// dynamically resizable buffer, size, and cursor.
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// Data structure of buffer: <field1, field2, ...>
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// Note that buffer has no internal construct to determine size of buffer
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// It is the responsibility of the user to know types of field1, ...
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// There are two types of MarshaledObj, depending on whether
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// IsUnmarshaling() is true or false.
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// I use malloc/free because I can also use realloc to extend the buffer.
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class MarshaledObj {
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private:
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// Make sure all marshaled objects are word aligned.
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static const int WORD_SIZE = sizeof(long);
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static inline int ROUND_UP( int x )
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{ return (((x)+(WORD_SIZE-1)) / WORD_SIZE) * WORD_SIZE; }
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public:
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inline MarshaledObj(int total_size)
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:extent(ROUND_UP(total_size)),size(0)
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{ if (extent > 0)
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buffer = (char *)malloc(extent);
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else
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buffer = NULL;
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cursor = buffer + size;
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}
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inline MarshaledObj()
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:extent(128),size(0)
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{ buffer = (char *)malloc(extent);
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cursor = buffer + size;
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}
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// this is for an arbitrary buffer; we specify the size explicitly
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// if buf_len == 0, then we'll be unmarshaling
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inline MarshaledObj(void *buf, int buf_len = 0)
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:extent(ROUND_UP(buf_len+sizeof(int))),
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size(ROUND_UP(buf_len+sizeof(buf_len)))
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{ if ( buf_len <= 0 ) {
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extent = size = 0; // IMPLIES: IsUnmarshaling() => true
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buffer = (char *)buf;
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cursor = buffer;
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} else {
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buffer = (char *)malloc(extent);
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*(int *)buffer = buf_len;
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memcpy( buffer+sizeof(int), (char *)buf, extent );
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cursor = buffer + size;
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}
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}
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inline ~MarshaledObj()
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{ if ( ! IsUnmarshaling() )
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free(buffer);
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}
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inline bool IsUnmarshaling() { return (extent <= 0); }
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private:
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// Don't use copy constructor
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const MarshaledObj& operator=(const MarshaledObj& right);
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protected:
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char *buffer; /* First entry is size of buffer */
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private:
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int extent; /* extent is number of bytes allocated, extent >= size */
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int size; /* Initially, buffer has entry for size */
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char *cursor;
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inline void ResizeBuffer( size_t new_size )
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{ int displacement = cursor - buffer;
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extent = new_size;
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buffer = (char *)realloc( buffer, extent );
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cursor = buffer + displacement;
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}
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public:
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inline int BufferSize()
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{ return cursor - buffer; }
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inline void *GetBuffer() {
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return buffer;
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}
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// inline void SetNewBuffer(void *buf) {
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// free(buffer);
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// buffer = (char *)buf;
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// size = 0; /* unknown size */
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// cursor = buffer;
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// }
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#define MarshalDefinition(TYPE) \
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inline void Marshal(TYPE a##TYPE) { \
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if (IsUnmarshaling()) \
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throw "Tried to marshal in object marked isUnmarshaling = true"; \
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size += ROUND_UP(sizeof(a##TYPE)); \
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while ( size > extent ) \
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ResizeBuffer( 2 * extent ); \
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*(TYPE *)cursor = a##TYPE; \
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cursor = buffer + size; \
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} \
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inline void Unmarshal(TYPE & a##TYPE) { \
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a##TYPE = *(TYPE *)cursor; \
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cursor += ROUND_UP(sizeof(a##TYPE)); \
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} \
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inline TYPE UnmarshalAs##TYPE() { \
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TYPE a##TYPE = *(TYPE *)cursor; \
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cursor += ROUND_UP(sizeof(a##TYPE)); \
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return a##TYPE; \
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}
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// This works for any inline objects (no embedded pointers)
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MarshalDefinition(G4int)
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MarshalDefinition(G4double)
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MarshalDefinition(G4ThreeVector)
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// MarshalDefinition(int)
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// MarshalDefinition(double)
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// These cannot follow the pattern, since the data is not inline.
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inline void MarshalG4String(G4String& aG4String) {
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if (IsUnmarshaling())
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throw "Tried to marshal in object marked isUnmarshaling = true";
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size += ROUND_UP( aG4String.length() + 1 ); // 1 for final NULL char
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while ( size > extent )
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ResizeBuffer( 2 * extent );
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strcpy( (char *)cursor, aG4String );
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cursor = buffer + size;
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}
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inline void Marshal(G4String& aG4String)
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{ MarshalG4String( aG4String ); }
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inline void Unmarshal(G4String& aG4String) {
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aG4String = (char *)cursor;
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cursor += ROUND_UP( aG4String.length() + 1 ); // 1 for final NULL char
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}
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// INEFFICIENT? (copies return value)
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inline G4String UnmarshalAsG4String() {
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G4String aG4String = (char *)cursor;
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cursor += ROUND_UP( aG4String.length() + 1 ); // 1 for final NULL char
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return aG4String;
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}
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// USAGE: MarshalObjPtr( &aG4obj, sizeof(aG4obj) );
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// USAGE: MarshaledObj tmp;
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// G4Obj *aObjPtr = tmp.UnmarshalObjPtr();
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// ...
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// delete aObjPtr;
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inline void MarshalObjPtr(const void * aObjPtr, int obj_size)
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{
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if (IsUnmarshaling())
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throw "Tried to marshal in object marked isUnmarshaling = true";
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size += ROUND_UP( obj_size + sizeof(int) );
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while ( size > extent )
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ResizeBuffer( 2 * extent );
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*(int *)cursor = obj_size;
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memcpy( cursor+sizeof(int), aObjPtr, obj_size );
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cursor = buffer + size;
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}
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inline void Marshal(const void * aObjPtr, int obj_size)
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{ MarshalObjPtr(aObjPtr,obj_size); }
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inline void Unmarshal(void * & aObjPtr)
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{
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int obj_size = *(int *)cursor;
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aObjPtr = malloc( obj_size );
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memcpy( aObjPtr, cursor+sizeof(int), obj_size );
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cursor += ROUND_UP( obj_size + sizeof(int) );
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}
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inline void * UnmarshalAsObjPtr()
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{
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void *aObjPtr;
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Unmarshal(aObjPtr);
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return aObjPtr;
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}
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inline void * UnmarshalAsSharedObjPtr()
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{
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int obj_size = *(int *)cursor;
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void *aObjPtr;
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aObjPtr = cursor+sizeof(int);
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cursor += ROUND_UP( obj_size + sizeof(int) );
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return aObjPtr;
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}
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// UnmarshalAsSharedObjPtr: return value points into buffer of curr. obj.
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inline void MarshalMarshaledObj(MarshaledObj& aMarshaledObj) {
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if (IsUnmarshaling())
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throw "Tried to marshal in object marked isUnmarshaling = true";
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MarshalObjPtr( aMarshaledObj.GetBuffer(), aMarshaledObj.BufferSize() );
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}
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// INEFFICIENT? (copies return value)
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inline MarshaledObj UnmarshalAsMarshaledObj() {
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MarshaledObj aMarshaledObj( ((char *)cursor)+sizeof(int), *(int *)cursor );
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cursor += ROUND_UP( aMarshaledObj.BufferSize()+sizeof(int) );
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return aMarshaledObj;
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}
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};
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class MarshaledHCofThisEvent : public MarshaledObj
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{
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public:
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inline MarshaledHCofThisEvent(int size) : MarshaledObj(size) { }
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// Trivial constructor. MarshaledHCofThisEvent(0) creates nothing.
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MarshaledHCofThisEvent();
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// Constructor copies hits from HCE of master in this marshaled object
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MarshaledHCofThisEvent(G4Event *anEvent);
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// Constructor copies hits from HCE of anEvent in this marshaled object
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inline MarshaledHCofThisEvent(void *buf)
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: MarshaledObj(buf) // Object will be set for IsUnmarshaling
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{ }
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void UnmarshalSlaveHCofThisEvent();
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// Unmarshal copies hits from slave in HCE of master
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// We inherit destructor of ParMarshaledObj
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// It does so by calling UnmarshalSlaveHitsCollection for dispatching
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void UnmarshalSlaveHitsCollection(G4String & HCname, G4String & SDname);
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void MarshalHitsCollection(G4VHitsCollection * aBaseHC, G4String HCname);
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// To be defined in ParExN02MarshaledHits.cc or other
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// application-specific file.
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private:
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// Don't use copy constructor
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const MarshaledHCofThisEvent& operator=(const MarshaledHCofThisEvent& right);
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void MarshalHitsCollection(const G4Event *anEvent);
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};
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/*
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main() {
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MarshaledObj tmp = MarshaledObj();
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tmp.Marshal(5);
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tmp.Marshal(5.3);
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tmp.Marshal(7);
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MarshaledObj tmp2;
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tmp2.MarshalMarshaledObj(tmp);
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cout << tmp2.UnmarshalAsG4int() << "\n";
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cout << tmp2.UnmarshalAsG4double() << "\n";
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cout << tmp2.UnmarshalAsG4int() << "\n";
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}
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*/
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#endif
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