ACE_Handle_Set Class Reference

C++ wrapper facade for the socket fd_set abstraction. More...

#include <Handle_Set.h>

Public Types
enum	{ MAXSIZE = ACE_DEFAULT_SELECT_REACTOR_SIZE }

Public Member Functions
	ACE_Handle_Set (void)
	Constructor, initializes the bitmask to all 0s. More...
	ACE_Handle_Set (const fd_set &mask)
void	reset (void)
	Initialize the bitmask to all 0s and reset the associated fields. More...
int	is_set (ACE_HANDLE handle) const
void	set_bit (ACE_HANDLE handle)
void	clr_bit (ACE_HANDLE handle)
int	num_set (void) const
	Returns a count of the number of enabled bits. More...
ACE_HANDLE	max_set (void) const
	Returns the number of the large bit. More...
void	sync (ACE_HANDLE max)
	operator fd_set * ()
fd_set *	fdset (void)
void	dump (void) const
	Dump the state of an object. More...

Public Attributes
	ACE_ALLOC_HOOK_DECLARE
	Declare the dynamic allocation hooks. More...

Private Types
enum	{ WORDSIZE = NFDBITS, NBITS = 256 }

Private Member Functions
void	set_max (ACE_HANDLE max)

Static Private Member Functions
static int	count_bits (u_long n)

Private Attributes
int	size_
	Size of the set, i.e., a count of the number of enabled bits. More...
ACE_HANDLE	max_handle_
	Current max handle. More...
fd_set	mask_
	Bitmask. More...

Static Private Attributes
static const char	nbits_ [NBITS]

Friends
class	ACE_Handle_Set_Iterator

Detailed Description

C++ wrapper facade for the socket fd_set abstraction.

This abstraction is a very efficient wrapper facade over fd_set. In particular, no range checking is performed, so it's important not to set or clear bits that are outside the ACE_DEFAULT_SELECT_REACTOR_SIZE.

Member Enumeration Documentation

anonymous enum

Enumerator
MAXSIZE

anonymous enum

private

Enumerator
WORDSIZE
NBITS

Constructor & Destructor Documentation

ACE_Handle_Set::ACE_Handle_Set

(

void

)

Constructor, initializes the bitmask to all 0s.

ACE_Handle_Set::ACE_Handle_Set

(

const fd_set &

mask

)

Constructor, initializes the handle set from a given mask.

Member Function Documentation

void ACE_Handle_Set::clr_bit ( ACE_HANDLE  handle )

inline

Disables the handle. No range checking is performed so handle must be less than ACE_DEFAULT_SELECT_REACTOR_SIZE.

int ACE_Handle_Set::count_bits ( u_long  n )

staticprivate

Counts the number of bits enabled in N. Uses a table lookup to speed up the count.

void ACE_Handle_Set::dump

(

void

)

const

Dump the state of an object.

fd_set * ACE_Handle_Set::fdset ( void  )

inline

Returns a pointer to the underlying fd_set. Returns 0 if there are no handle bits set (<size_> == 0).

int ACE_Handle_Set::is_set ( ACE_HANDLE  handle ) const

inline

Checks whether handle is enabled. No range checking is performed so handle must be less than ACE_DEFAULT_SELECT_REACTOR_SIZE.

ACE_HANDLE ACE_Handle_Set::max_set ( void  ) const

inline

Returns the number of the large bit.

int ACE_Handle_Set::num_set ( void  ) const

inline

Returns a count of the number of enabled bits.

ACE_Handle_Set::operator fd_set * ( )

inline

Returns a pointer to the underlying fd_set. Returns 0 if there are no handle bits set (<size_> == 0).

void ACE_Handle_Set::reset ( void  )

inline

Initialize the bitmask to all 0s and reset the associated fields.

void ACE_Handle_Set::set_bit ( ACE_HANDLE  handle )

inline

Enables the handle. No range checking is performed so handle must be less than ACE_DEFAULT_SELECT_REACTOR_SIZE.

void ACE_Handle_Set::set_max ( ACE_HANDLE  max )

private

Resets the <max_handle_> after a clear of the original <max_handle_>.

void ACE_Handle_Set::sync

(

ACE_HANDLE

max

)

Rescan the underlying fd_set up to handle max to find the new <max_handle> (highest bit set) and <size> (how many bits set) values. This is useful for evaluating the changes after the handle set has been manipulated in some way other than member functions; for example, after <select> modifies the fd_set.

Friends And Related Function Documentation

friend class ACE_Handle_Set_Iterator

friend

Member Data Documentation

ACE_Handle_Set::ACE_ALLOC_HOOK_DECLARE

Declare the dynamic allocation hooks.

fd_set ACE_Handle_Set::mask_

private

Bitmask.

ACE_HANDLE ACE_Handle_Set::max_handle_

private

Current max handle.

const char ACE_Handle_Set::nbits_

staticprivate

Initial value:

=
{
  0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4,
  1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5,
  1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5,
  2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
  1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5,
  2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
  2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
  3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7,
  1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5,
  2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
  2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
  3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7,
  2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
  3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7,
  3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7,
  4, 5, 5, 6, 5, 6, 6, 7, 5, 6, 6, 7, 6, 7, 7, 8}

Table that maps bytes to counts of the enabled bits in each value from 0 to 255.

int ACE_Handle_Set::size_

private

Size of the set, i.e., a count of the number of enabled bits.

---

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

• Handle_Set.h
• Handle_Set.cpp
• Handle_Set.inl