BufferfstreamManager.cpp

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// BufferfstreamManager.cpp
//////////////////////////////////////////////////////////////////////
//          (c) Copyright 2002 Brown Deer Technology, LLC.
//                        All rights reserved.
//////////////////////////////////////////////////////////////////////

#ifdef USE_STD
#include <iostream>
using namespace std;
#else
#include <iostream.h>
#endif

#include "utility.h"
#include "BufferfstreamManager.h"

BufferfstreamManager* BufferfstreamManager::_ptinstance = 0;

bool* BufferfstreamManager::_freetable=new bool[BUFFERFSTREAMMANAGER_SIZEMAX];

int BufferfstreamManager::_begin = 1;

BufferfstreamManager* BufferfstreamManager::Instance()
{
   if ( _ptinstance == 0 ) _ptinstance = new BufferfstreamManager;
   return _ptinstance;
}

void BufferfstreamManager::clear()
{
   _begin = 1;
   _freetable[0] = false;
   for(int i = 1; i < BUFFERFSTREAMMANAGER_SIZEMAX; ++i) _freetable[i] = true;
}

int BufferfstreamManager::get_handle()
{
   int handle = _begin;
   while ( ( !_freetable[handle] ) 
     && ( handle++ < BUFFERFSTREAMMANAGER_SIZEMAX ) ) {}
   _freetable[handle] = false;
   _begin = handle;
   return handle;
}

void BufferfstreamManager::free_handle( int handle )
{
   _freetable[handle] = true;
   if ( handle < _begin ) _begin = handle;
}

BufferfstreamManager::BufferfstreamManager()
{
   _freetable[0] = false;
   for(int i = 1; i < BUFFERFSTREAMMANAGER_SIZEMAX; ++i) _freetable[i] = true;
}

BufferfstreamManager::BufferfstreamManager( const BufferfstreamManager& rhs )
{
   _begin = rhs._begin;
   for(int i = 0; i < BUFFERFSTREAMMANAGER_SIZEMAX; ++i) {
      _freetable[i] = rhs._freetable[i];
   }
}

BufferfstreamManager::~BufferfstreamManager()
{
   if ( _freetable != 0 ) { delete [] _freetable; _freetable = 0; }
   if ( _ptinstance != 0 ) { delete _ptinstance; _ptinstance = 0; }
}

BufferfstreamManager& BufferfstreamManager::operator = ( 
  const BufferfstreamManager& rhs
)
{
   _begin = rhs._begin;
   for(int i = 0; i < BUFFERFSTREAMMANAGER_SIZEMAX; ++i) {
      _freetable[i] = rhs._freetable[i];
   }
   return *this;
}

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