/usr/include/ace/Functor.h is in libace-dev 6.2.8+dfsg-1.
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//==========================================================================
/**
* @file Functor.h
*
* $Id: Functor.h 95761 2012-05-15 18:23:04Z johnnyw $
*
* Non-templatized classes and class template specializations for
* implementing function objects that are used in various places
* in ACE. There are currently two major categories of function
* objects in ACE: GoF Command Pattern objects, and STL-style
* functors for comparison of container elements. The command objects
* are invoked via an execute () method, while the STL-style functors are
* invoked via an operator() () method.
* Non-templatized classes for implementing the GoF Command Pattern,
* also known as functors or function objects.
*
*
* @author Chris Gill <cdgill@cs.wustl.edu>
* @author Based on Command Pattern implementations originally done by
* @author Carlos O'Ryan <coryan@cs.wustl.edu>
* @author Douglas C. Schmidt <schmidt@cs.wustl.edu>
* @author Sergio Flores-Gaitan <sergio@cs.wustl.edu>
* @author and on STL-style functor implementations originally done by
* @author Irfan Pyarali <irfan@cs.wustl.edu>
*/
//==========================================================================
#ifndef ACE_FUNCTOR_H
#define ACE_FUNCTOR_H
#include /**/ "ace/pre.h"
#include /**/ "ace/config-all.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#include /**/ "ace/ACE_export.h"
#include "ace/Basic_Types.h"
ACE_BEGIN_VERSIONED_NAMESPACE_DECL
//////////////////////////////////////////////////////////////
// GOF Command Pattern Classes and Template Specializations //
//////////////////////////////////////////////////////////////
/**
* @class ACE_Command_Base
*
* @brief Defines an abstract class that allows us to invoke commands
* without knowing anything about the implementation.
*
* This class declares an interface to execute a command
* independent of the effect of the command, or the objects used
* to implement it.
*/
class ACE_Export ACE_Command_Base
{
public:
// = Initialization and termination methods.
/// Default constructor.
ACE_Command_Base (void);
/// Virtual destructor.
virtual ~ACE_Command_Base (void);
/**
* Invokes the method encapsulated by the command, passing along the
* passed argument (if any). Users of classes derived from this
* class must ensure that the resulting invocation can tolerate a
* null void pointer being passed, or otherwise ensure that this
* will never occur.
*/
virtual int execute (void *arg = 0) = 0;
};
/**
* @class ACE_Noop_Command
*
* Implements a ACE_Command_Base with an empty execute() body.
*/
class ACE_Export ACE_Noop_Command
: public ACE_Command_Base
{
public:
/// Constructor
ACE_Noop_Command();
/// Implement the empty execute() member function
virtual int execute(void*);
};
////////////////////////////////////////////////////////////
// STL-style Functor Classes and Template Specializations //
////////////////////////////////////////////////////////////
// Forward declaration since we are going to specialize that template
// here. The template itself requires this file so every user of the
// template should also see the specialization.
template <class TYPE> class ACE_Hash;
template <class TYPE> class ACE_Equal_To;
template <class TYPE> class ACE_Less_Than;
/**
* @brief Function object for hashing a char
*/
template<>
class ACE_Export ACE_Hash<char>
{
public:
/// Simply returns t
unsigned long operator () (char t) const;
};
/**
* @brief Function object for hashing a signed char
*/
template<>
class ACE_Export ACE_Hash<signed char>
{
public:
/// Simply returns t
unsigned long operator () (signed char t) const;
};
/**
* @brief Function object for hashing an unsigned char
*/
template<>
class ACE_Export ACE_Hash<unsigned char>
{
public:
/// Simply returns t
unsigned long operator () (unsigned char t) const;
};
/**
* @brief Function object for hashing a short number
*/
template<>
class ACE_Export ACE_Hash<short>
{
public:
/// Simply returns t
unsigned long operator () (short t) const;
};
/**
* @brief Function object for hashing an unsigned short number
*/
template<>
class ACE_Export ACE_Hash<unsigned short>
{
public:
/// Simply returns t
unsigned long operator () (unsigned short t) const;
};
/**
* @brief Function object for hashing an int number
*/
template<>
class ACE_Export ACE_Hash<int>
{
public:
/// Simply returns t
unsigned long operator () (int t) const;
};
/**
* @brief Function object for hashing an unsigned int number
*/
template<>
class ACE_Export ACE_Hash<unsigned int>
{
public:
/// Simply returns t
unsigned long operator () (unsigned int t) const;
};
/**
* @brief Function object for hashing a long number
*/
template<>
class ACE_Export ACE_Hash<long>
{
public:
/// Simply returns t
unsigned long operator () (long t) const;
};
/**
* @brief Function object for hashing an unsigned long number
*/
template<>
class ACE_Export ACE_Hash<unsigned long>
{
public:
/// Simply returns t
unsigned long operator () (unsigned long t) const;
};
#if (ACE_SIZEOF_LONG < 8)
/**
* @brief Function object for hashing a signed 64-bit number
*/
template<>
class ACE_Export ACE_Hash<ACE_INT64>
{
public:
/// Simply returns t
unsigned long operator () (ACE_INT64 t) const;
};
#endif /* ACE_SIZEOF_LONG < 8 */
#if (ACE_SIZEOF_LONG < 8)
/**
* @brief Function object for hashing an unsigned 64-bit number
*/
template<>
class ACE_Export ACE_Hash<ACE_UINT64>
{
public:
/// Simply returns t
unsigned long operator () (const ACE_UINT64 &t) const;
};
#endif /* ACE_SIZEOF_LONG < 8 */
/**
* @brief Function object for hashing a const string
*/
template<>
class ACE_Export ACE_Hash<const char *>
{
public:
/// Calls ACE::hash_pjw
unsigned long operator () (const char *t) const;
};
/**
* @brief Function object for hashing a string
*/
template<>
class ACE_Export ACE_Hash<char *>
{
public:
/// Calls ACE::hash_pjw
unsigned long operator () (const char *t) const;
};
/**
* @brief Function object for hashing a void *
*/
template<>
class ACE_Export ACE_Hash<void *>
{
public:
unsigned long operator () (const void *) const;
};
/**
* @brief Function object for determining whether two const strings are equal.
*/
template<>
class ACE_Export ACE_Equal_To<const char *>
{
public:
/// Simply calls ACE_OS::strcmp
int operator () (const char *lhs,
const char *rhs) const;
};
/**
* @brief Function object for determining whether two non-const
* strings are equal.
*/
template<>
class ACE_Export ACE_Equal_To<char *>
{
public:
/// Simply calls ACE_OS::strcmp
int operator () (const char *lhs,
const char *rhs) const;
};
/**
* @brief Function object for determining whether two unsigned
* 16 bit ints are equal.
*/
template<>
class ACE_Export ACE_Equal_To<ACE_UINT16>
{
public:
/// Simply calls built-in operators
int operator () (const ACE_UINT16 lhs,
const ACE_UINT16 rhs) const;
};
/**
* @brief Function object for determining whether two
* 16 bit ints are equal.
*/
template<>
class ACE_Export ACE_Equal_To<ACE_INT16>
{
public:
/// Simply calls built-in operators
int operator () (const ACE_INT16 lhs,
const ACE_INT16 rhs) const;
};
/**
* @brief Function object for determining whether two unsigned
* 32 bit ints are equal.
*/
template<>
class ACE_Export ACE_Equal_To<ACE_UINT32>
{
public:
/// Simply calls built-in operators
int operator () (const ACE_UINT32 lhs,
const ACE_UINT32 rhs) const;
};
/**
* @brief Function object for determining whether two
* 32 bit ints are equal.
*/
template<>
class ACE_Export ACE_Equal_To<ACE_INT32>
{
public:
/// Simply calls built-in operators
int operator () (const ACE_INT32 lhs,
const ACE_INT32 rhs) const;
};
/**
* @brief Function object for determining whether two unsigned
* 64 bit ints are equal.
*/
template<>
class ACE_Export ACE_Equal_To<ACE_UINT64>
{
public:
/// Simply calls built-in operators
int operator () (const ACE_UINT64 lhs,
const ACE_UINT64 rhs) const;
};
/**
* @brief Function object for determining whether the first const string
* is less than the second const string.
*/
template<>
class ACE_Export ACE_Less_Than<const char *>
{
public:
/// Simply calls ACE_OS::strcmp
int operator () (const char *lhs,
const char *rhs) const;
};
/**
* @brief Function object for determining whether the first string
* is less than the second string.
*/
template<>
class ACE_Export ACE_Less_Than<char *>
{
public:
/// Simply calls ACE_OS::strcmp
int operator () (const char *lhs,
const char *rhs) const;
};
#if defined (ACE_HAS_WCHAR)
# if ! defined (ACE_LACKS_NATIVE_WCHAR_T)
/**
* @brief Function object for hashing a wchar_t
*/
template<>
class ACE_Export ACE_Hash<wchar_t>
{
public:
/// Simply returns t
unsigned long operator () (wchar_t t) const;
};
# endif /* ACE_LACKS_NATIVE_WCHAR_T */
/**
* @brief Function object for hashing a const string
*/
template<>
class ACE_Export ACE_Hash<const wchar_t *>
{
public:
/// Calls ACE::hash_pjw
unsigned long operator () (const wchar_t *t) const;
};
/**
* @brief Function object for hashing a string
*/
template<>
class ACE_Export ACE_Hash<wchar_t *>
{
public:
/// Calls ACE::hash_pjw
unsigned long operator () (const wchar_t *t) const;
};
/**
* @brief Function object for determining whether two const strings are equal.
*/
template<>
class ACE_Export ACE_Equal_To<const wchar_t *>
{
public:
/// Simply calls ACE_OS::strcmp
int operator () (const wchar_t *lhs,
const wchar_t *rhs) const;
};
/**
* @brief Function object for determining whether two non-const
* strings are equal.
*/
template<>
class ACE_Export ACE_Equal_To<wchar_t *>
{
public:
/// Simply calls ACE_OS::strcmp
int operator () (const wchar_t *lhs,
const wchar_t *rhs) const;
};
/**
* @brief Function object for determining whether the first const string
* is less than the second const string.
*/
template<>
class ACE_Export ACE_Less_Than<const wchar_t *>
{
public:
/// Simply calls ACE_OS::strcmp
int operator () (const wchar_t *lhs,
const wchar_t *rhs) const;
};
/**
* @brief Function object for determining whether the first string
* is less than the second string.
*/
template<>
class ACE_Export ACE_Less_Than<wchar_t *>
{
public:
/// Simply calls ACE_OS::strcmp
int operator () (const wchar_t *lhs,
const wchar_t *rhs) const;
};
#endif // ACE_HAS_WCHAR
ACE_END_VERSIONED_NAMESPACE_DECL
#if defined (__ACE_INLINE__)
#include "ace/Functor.inl"
#endif /* __ACE_INLINE__ */
#include /**/ "ace/post.h"
#endif /* ACE_FUNCTOR_H */
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