| # Gaudi Framework, version v21r8 |

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# RndmGen Class Reference

Random Generator definition. More...

`#include <RndmGen.h>`

Inheritance diagram for RndmGen:

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Collaboration diagram for RndmGen:

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List of all members.

## Public Member Functions
virtual StatusCode | initialize (const IRndmGen::Param &par)
| IRndmGen implementation.
virtual StatusCode | finalize ()
| Initialize the generator.
virtual const InterfaceID & | type () const
| Random number generator type.
virtual long | ID () const
| Random number generator ID.
virtual const IRndmGen::Param * | parameters () const
| Access to random number generator parameters.
virtual double | shoot () const
| Single shot returning single random number according to specified distribution.
virtual StatusCode | shootArray (std::vector< double > &array, long howmany, long start) const
| Multiple shots returning vector with random number according to specified distribution.
## Protected Member Functions
| RndmGen (IInterface *engine)
| Standard Constructor.
virtual | ~RndmGen ()
| Standard Destructor.
## Protected Attributes
IRndmGen::Param * | m_params
| Generation parameters.
IRndmEngine * | m_engine
| Hosting service: Access must always be possible.

## Detailed Description

Random Generator definition.

Description: Definition of a interface for a generic random number generators.

Dependencies:

- Generic Service interface: Gaudi/Interfaces/IInterface.h

History :

        +---------+----------------------------------------------+--------+
        |    Date |                 Comment                      | Who    |
        +---------+----------------------------------------------+--------+
        | 21/11/99| Initial version.                             | MF     |
        +---------+----------------------------------------------+--------+

Author: M.Frank Version: 1.0

Definition at line 39 of file RndmGen.h.

## Constructor & Destructor Documentation

RndmGen::RndmGen | ( | IInterface * | engine | ) | `[protected]`

Standard Constructor.

Definition at line 22 of file RndmGen.cpp.

    00022                                    : m_params(0), m_engine(0)   {
    00023   if ( 0 != engine )  {
    00024     engine->queryInterface(IRndmEngine::interfaceID(), pp_cast<void>(&m_engine)).ignore();
    00025   }
    00026 }

RndmGen::~RndmGen | ( |  | ) | `[protected, virtual]`

Standard Destructor.

Definition at line 29 of file RndmGen.cpp.

    00029                     {
    00030   if ( m_engine ) m_engine->release();
    00031   m_engine = 0;
    00032   if ( m_params ) delete m_params;
    00033   m_params = 0;
    00034 }

## Member Function Documentation

StatusCode RndmGen::initialize | ( | const IRndmGen::Param & | par | ) | `[virtual]`

IRndmGen implementation.

Initialize the generator.

Initialize the generator

Implements IRndmGen.

Reimplemented in HepRndm::Generator< TYPE >, and HepRndm::Generator< Rndm::DefinedPdf >.

Definition at line 37 of file RndmGen.cpp.

    00037                                                          {
    00038   m_params = par.clone();
    00039   return (0==m_engine) ? StatusCode::FAILURE : StatusCode::SUCCESS;
    00040 }

StatusCode RndmGen::finalize | ( | void |  | ) | `[virtual]`

Initialize the generator.

Initialize the RndmGen.

Implements IRndmGen.

Reimplemented in HepRndm::Generator< Rndm::DefinedPdf >.

Definition at line 43 of file RndmGen.cpp.

    00043                                {
    00044   return StatusCode::SUCCESS;
    00045 }

virtual const InterfaceID& RndmGen::type | ( |  | ) | const`[inline, virtual]`

Random number generator type.

Implements IRndmGen.

Definition at line 60 of file RndmGen.h.

    00060                                              {
    00061     return (m_params != 0) ? m_params->type() : IID_IRndmFlat;
    00062   }

virtual long RndmGen::ID | ( |  | ) | const`[inline, virtual]`

Random number generator ID.

Implements IRndmGen.

Definition at line 64 of file RndmGen.h.

    00064                              {
    00065     return long(this);
    00066   }

virtual const IRndmGen::Param* RndmGen::parameters | ( |  | ) | const`[inline, virtual]`

Access to random number generator parameters.

Implements IRndmGen.

Definition at line 68 of file RndmGen.h.

    00068                                                      {
    00069     return m_params;
    00070   }

double RndmGen::shoot | ( |  | ) | const`[virtual]`

Single shot returning single random number according to specified distribution.

Implements IRndmGen.

Reimplemented in HepRndm::Generator< TYPE >, HepRndm::Generator< Rndm::DefinedPdf >, HepRndm::Generator< TYPE >, HepRndm::Generator< TYPE >, HepRndm::Generator< TYPE >, HepRndm::Generator< TYPE >, HepRndm::Generator< TYPE >, HepRndm::Generator< TYPE >, HepRndm::Generator< TYPE >, HepRndm::Generator< TYPE >, HepRndm::Generator< TYPE >, HepRndm::Generator< TYPE >, HepRndm::Generator< TYPE >, HepRndm::Generator< TYPE >, and HepRndm::Generator< TYPE >.

Definition at line 48 of file RndmGen.cpp.

    00048                               {
    00049   return DBL_MAX;
    00050 }

StatusCode RndmGen::shootArray | ( | std::vector< double > & | array,
|  | long | howmany,
|  | long | start |
| ) |  |  | const`[virtual]`

Multiple shots returning vector with random number according to specified distribution.

Parameters:

  | array | Array containing random numbers
  | howmany | fill 'howmany' random numbers into array
  | start | ... starting at position start

Implements IRndmGen.

Definition at line 53 of file RndmGen.cpp.

    00053                                                                                         {
    00054   if ( 0 != m_engine )    {
    00055     long cnt = start;
    00056     array.resize(start+howmany);
    00057     for ( long i = start, num = start+howmany; i < num; i++ )     {
    00058       array[cnt++] = shoot();
    00059     }
    00060     return StatusCode::SUCCESS;
    00061   }
    00062   return StatusCode::FAILURE;
    00063 }

## Member Data Documentation

IRndmGen::Param* RndmGen::m_params`[protected]`

Generation parameters.

Definition at line 43 of file RndmGen.h.

IRndmEngine* RndmGen::m_engine`[protected]`

Hosting service: Access must always be possible.

Definition at line 45 of file RndmGen.h.

The documentation for this class was generated from the following files:

- /afs/cern.ch/sw/Gaudi/releases/GAUDI/GAUDI_v21r8/GaudiSvc/src/RndmGenSvc/RndmGen.h
- /afs/cern.ch/sw/Gaudi/releases/GAUDI/GAUDI_v21r8/GaudiSvc/src/RndmGenSvc/RndmGen.cpp