ReferenceCountedObject

NAME

SYNOPSIS

#include <reference_counted_object.h>

Inherits ReferenceCounter.  

Public Member Functions

virtual ~ReferenceCountedObject ()
 

Static Public Member Functions

static std::string get_info ()

static void print_info ()

static unsigned int n_objects ()
 

Protected Types

typedef std::map< std::string, std::pair< unsigned int, unsigned int > > Counts
 

Protected Member Functions

ReferenceCountedObject ()

void increment_constructor_count (const std::string &name)

void increment_destructor_count (const std::string &name)
 

Static Protected Attributes

static Counts _counts

static Threads::atomic< unsigned int > _n_objects

static Threads::spin_mutex _mutex
 

Detailed Description

template<typename T> class ReferenceCountedObject< T >

 class Foo : public ReferenceCountedObject<Foo>
 {
  public:

    Foo  () {}

    ~Foo () {}

    void bar ();
 
  private:
 };

If the library is configured with --disable-reference-counting or DEBUG is not defined then this class does nothing. All members are inlined and empty, so they should effectively disappear.

Author:

Benjamin S. Kirk, 2002-2007

Definition at line 68 of file reference_counted_object.h.  

Member Typedef Documentation

typedef std::map<std::string, std::pair<unsigned int, unsigned int> > ReferenceCounter::Counts [protected, inherited]Data structure to log the information. The log is identified by the class name.

Definition at line 105 of file reference_counter.h.  

Constructor & Destructor Documentation

template<typename T> ReferenceCountedObject< T >::ReferenceCountedObject () [inline, protected]Constructor. Protected so that you cannont instantiate a ReferenceCountedObject, only derive from it.

Definition at line 77 of file reference_counted_object.h.

  {
#if defined(LIBMESH_ENABLE_REFERENCE_COUNTING) && defined(DEBUG)
    
    increment_constructor_count(typeid(T).name());

#endif
  }

template<typename T> virtual ReferenceCountedObject< T >::~ReferenceCountedObject () [inline, virtual]Destructor.

Definition at line 91 of file reference_counted_object.h.

  {
#if defined(LIBMESH_ENABLE_REFERENCE_COUNTING) && defined(DEBUG)
    
    increment_destructor_count(typeid(T).name());

#endif
  }

Member Function Documentation

std::string ReferenceCounter::get_info () [static, inherited]Gets a string containing the reference information.

Definition at line 45 of file reference_counter.C.

References ReferenceCounter::_counts, and Quality::name().

Referenced by ReferenceCounter::print_info().

{
#if defined(LIBMESH_ENABLE_REFERENCE_COUNTING) && defined(DEBUG)

  std::ostringstream out;
  
  out << '
      << ' ---------------------------------------------------------------------------- 
      << '| Reference count information                                                |
      << ' ---------------------------------------------------------------------------- ;
  
  for (Counts::iterator it = _counts.begin();
       it != _counts.end(); ++it)
    {
      const std::string name(it->first);
      const unsigned int creations    = it->second.first;
      const unsigned int destructions = it->second.second;

      out << '| ' << name << ' reference count information:
          << '|  Creations:    ' << creations    << '
          << '|  Destructions: ' << destructions << ';
    }
  
  out << ' ---------------------------------------------------------------------------- ;

  return out.str();

#else

  return '';
  
#endif
}

void ReferenceCounter::increment_constructor_count (const std::string &name) [inline, protected, inherited]Increments the construction counter. Should be called in the constructor of any derived class that will be reference counted.

Definition at line 149 of file reference_counter.h.

References ReferenceCounter::_counts, Quality::name(), and Threads::spin_mtx.

Referenced by ReferenceCountedObject< Value >::ReferenceCountedObject().

{
  Threads::spin_mutex::scoped_lock lock(Threads::spin_mtx);
  std::pair<unsigned int, unsigned int>& p = _counts[name];

  p.first++;
}

void ReferenceCounter::increment_destructor_count (const std::string &name) [inline, protected, inherited]Increments the destruction counter. Should be called in the destructor of any derived class that will be reference counted.

Definition at line 167 of file reference_counter.h.

References ReferenceCounter::_counts, Quality::name(), and Threads::spin_mtx.

Referenced by ReferenceCountedObject< Value >::~ReferenceCountedObject().

{
  Threads::spin_mutex::scoped_lock lock(Threads::spin_mtx);
  std::pair<unsigned int, unsigned int>& p = _counts[name];

  p.second++;
}

static unsigned int ReferenceCounter::n_objects () [inline, static, inherited]Prints the number of outstanding (created, but not yet destroyed) objects.

Definition at line 76 of file reference_counter.h.

References ReferenceCounter::_n_objects.

Referenced by System::read_serialized_blocked_dof_objects(), and System::write_serialized_blocked_dof_objects().

  { return _n_objects; }

void ReferenceCounter::print_info () [static, inherited]Prints the reference information to std::cout.

Definition at line 83 of file reference_counter.C.

References ReferenceCounter::get_info().

{
#if defined(LIBMESH_ENABLE_REFERENCE_COUNTING) && defined(DEBUG)
  
  std::cout << ReferenceCounter::get_info();
  
#endif
}

Member Data Documentation

ReferenceCounter::Counts ReferenceCounter::_counts [static, protected, inherited]Actually holds the data.

Definition at line 110 of file reference_counter.h.

Referenced by ReferenceCounter::get_info(), ReferenceCounter::increment_constructor_count(), and ReferenceCounter::increment_destructor_count().  

Threads::spin_mutex ReferenceCounter::_mutex [static, protected, inherited]Mutual exclusion object to enable thread-safe reference counting.

Definition at line 123 of file reference_counter.h.  

Threads::atomic< unsigned int > ReferenceCounter::_n_objects [static, protected, inherited]The number of objects. Print the reference count information when the number returns to 0.

Definition at line 118 of file reference_counter.h.

Referenced by ReferenceCounter::n_objects(), ReferenceCounter::ReferenceCounter(), and ReferenceCounter::~ReferenceCounter().

Author

Generated automatically by Doxygen for libMesh from the source code.

Index

NAME

SYNOPSIS

Public Member Functions

Static Public Member Functions

Protected Types

Protected Member Functions

Static Protected Attributes

Detailed Description

template<typename T> class ReferenceCountedObject< T >

Member Typedef Documentation

typedef std::map<std::string, std::pair<unsigned int, unsigned int> > ReferenceCounter::Counts [protected, inherited]Data structure to log the information. The log is identified by the class name.

Constructor & Destructor Documentation

template<typename T> ReferenceCountedObject< T >::ReferenceCountedObject () [inline, protected]Constructor. Protected so that you cannont instantiate a ReferenceCountedObject, only derive from it.

template<typename T> virtual ReferenceCountedObject< T >::~ReferenceCountedObject () [inline, virtual]Destructor.

Member Function Documentation

std::string ReferenceCounter::get_info () [static, inherited]Gets a string containing the reference information.

void ReferenceCounter::increment_constructor_count (const std::string &name) [inline, protected, inherited]Increments the construction counter. Should be called in the constructor of any derived class that will be reference counted.

void ReferenceCounter::increment_destructor_count (const std::string &name) [inline, protected, inherited]Increments the destruction counter. Should be called in the destructor of any derived class that will be reference counted.

static unsigned int ReferenceCounter::n_objects () [inline, static, inherited]Prints the number of outstanding (created, but not yet destroyed) objects.

void ReferenceCounter::print_info () [static, inherited]Prints the reference information to std::cout.

Member Data Documentation

ReferenceCounter::Counts ReferenceCounter::_counts [static, protected, inherited]Actually holds the data.

Threads::spin_mutex ReferenceCounter::_mutex [static, protected, inherited]Mutual exclusion object to enable thread-safe reference counting.

Threads::atomic< unsigned int > ReferenceCounter::_n_objects [static, protected, inherited]The number of objects. Print the reference count information when the number returns to 0.

Author