TAO_Perfect_Hash_OpTable Class Reference

Helper class for use of perfect hashing operation lookup strategy. More...

#include <Operation_Table_Perfect_Hash.h>

Inheritance diagram for TAO_Perfect_Hash_OpTable:

[legend]Collaboration diagram for TAO_Perfect_Hash_OpTable:

[legend]List of all members.

Public Member Functions
virtual	~TAO_Perfect_Hash_OpTable (void)
	Do nothing destrctor.
virtual int	find (const char *opname, TAO_Skeleton &skelfunc, const unsigned int length=0)
	See the documentation in the base class for details.
virtual int	find (const char *opname, TAO_Collocated_Skeleton &skelfunc, TAO::Collocation_Strategy s, const unsigned int length=0)
virtual int	bind (const char *opname, const TAO::Operation_Skeletons skel_ptr)
Private Member Functions
virtual unsigned int	hash (const char *str, unsigned int len)=0
virtual const TAO_operation_db_entry *	lookup (const char *str, unsigned int len)=0

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Detailed Description

Helper class for use of perfect hashing operation lookup strategy.

This class declares pure virtual methods called 'lookup ()' and 'hash ()' which will be generated by the GPERF program. These methods are used by 'bind ()' and 'find ()' methods. Subclasses will define the lookup and hash functions.

Definition at line 40 of file Operation_Table_Perfect_Hash.h.

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Constructor & Destructor Documentation

TAO_BEGIN_VERSIONED_NAMESPACE_DECL TAO_Perfect_Hash_OpTable::~TAO_Perfect_Hash_OpTable

(

void

)

[virtual]

Do nothing destrctor.

Definition at line 35 of file Operation_Table_Perfect_Hash.cpp.

{
}

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Member Function Documentation

int TAO_Perfect_Hash_OpTable::bind	(	const char *	opname,
		const TAO::Operation_Skeletons	skel_ptr
	)			[virtual]

Associate the skeleton skel_ptr with an operation named opname. Returns -1 on failure, 0 on success, 1 on duplicate.

Implements TAO_Operation_Table.

Definition at line 97 of file Operation_Table_Perfect_Hash.cpp.

{
  return 0;
}

int TAO_Perfect_Hash_OpTable::find	(	const char *	opname,
		TAO_Collocated_Skeleton &	skelfunc,
		TAO::Collocation_Strategy	s,
		const unsigned int	length = 0
	)			[virtual]

Uses opname to look up the collocated skeleton function and pass it back in skelfunc. Returns non-negative integer on success, or -1 on failure.

Implements TAO_Operation_Table.

Definition at line 65 of file Operation_Table_Perfect_Hash.cpp.

References ACE_ERROR_RETURN, ACE_FUNCTION_TIMEPROBE, ACE_TEXT(), ACE_TEXT_CHAR_TO_TCHAR, TAO_operation_db_entry::direct_skel_ptr, LM_ERROR, lookup(), and TAO::TAO_CS_DIRECT_STRATEGY.

{
  ACE_FUNCTION_TIMEPROBE (TAO_PERFECT_HASH_OPTABLE_FIND_START);

  TAO_operation_db_entry const * const entry = lookup (opname,
                                                       length);
  if (entry == 0)
    {
      skelfunc = 0; // insure that somebody can't call a wrong function!
      ACE_ERROR_RETURN ((LM_ERROR,
                         ACE_TEXT ("TAO_Perfect_Hash_OpTable:find for ")
                         ACE_TEXT ("operation '%s' (length=%d) failed\n"),
                         ACE_TEXT_CHAR_TO_TCHAR (opname ? opname : "<null string>"), length),
                        -1);
    }

  switch (st)
    {
    case TAO::TAO_CS_DIRECT_STRATEGY:
      skelfunc = entry->direct_skel_ptr;
      break;
    default:
      return -1;
    }

  return 0;
}

int TAO_Perfect_Hash_OpTable::find	(	const char *	opname,
		TAO_Skeleton &	skelfunc,
		const unsigned int	length = 0
	)			[virtual]

See the documentation in the base class for details.

Implements TAO_Operation_Table.

Definition at line 40 of file Operation_Table_Perfect_Hash.cpp.

References ACE_ERROR_RETURN, ACE_FUNCTION_TIMEPROBE, ACE_TEXT(), ACE_TEXT_CHAR_TO_TCHAR, LM_ERROR, lookup(), and TAO_operation_db_entry::skel_ptr.

{
  ACE_FUNCTION_TIMEPROBE (TAO_PERFECT_HASH_OPTABLE_FIND_START);

  TAO_operation_db_entry const * const entry = lookup (opname,
                                                       length);
  if (entry == 0)
    {
      skelfunc = 0; // insure that somebody can't call a wrong function!
      ACE_ERROR_RETURN ((LM_ERROR,
                         ACE_TEXT ("TAO_Perfect_Hash_OpTable:find for ")
                         ACE_TEXT ("operation '%s' (length=%d) failed\n"),
                         ACE_TEXT_CHAR_TO_TCHAR (opname ? opname : "<null string>"), length),
                        -1);
    }

  // Valid entry. Figure out the skel_ptr.
  skelfunc = entry->skel_ptr;

  return 0;
}

virtual unsigned int TAO_Perfect_Hash_OpTable::hash	(	const char *	str,
		unsigned int	len
	)			[private, pure virtual]

Implemented in TAO_CORBA_Policy_Perfect_Hash_OpTable.

virtual const TAO_operation_db_entry* TAO_Perfect_Hash_OpTable::lookup	(	const char *	str,
		unsigned int	len
	)			[private, pure virtual]

Implemented in TAO_CORBA_Policy_Perfect_Hash_OpTable.

Referenced by find().

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

• Operation_Table_Perfect_Hash.h
• Operation_Table_Perfect_Hash.cpp

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