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ACE_Tokens Class Reference

Abstract representation of ACE tokens. More...

#include <Local_Tokens.h>

Inheritance diagram for ACE_Tokens:

[legend]Collaboration diagram for ACE_Tokens:

[legend]List of all members.

Public Types
typedef ACE_Unbounded_Stack< ACE_TPQ_Entry * >	OWNER_STACK
	Stack of owners.
enum	TOKEN_TYPES { MUTEX, RWLOCK }
Public Methods
	ACE_Tokens (void)
	Null constructor.
virtual	~ACE_Tokens (void)
	Destructor.
virtual int	acquire (ACE_TPQ_Entry *caller, int ignore_deadlock, int notify)=0
	No implementation.
virtual int	tryacquire (ACE_TPQ_Entry *caller)=0
	No implementation.
virtual int	renew (ACE_TPQ_Entry *caller, int requeue_position)=0
	No implementation.
virtual int	release (ACE_TPQ_Entry *caller)=0
	No implementation.
void	make_owner (ACE_TPQ_Entry *caller)
void	remove (ACE_TPQ_Entry *caller)
	Remove the caller from the waiter list.
virtual int	owners (OWNER_STACK &o, const ACE_TCHAR *id)=0
virtual int	is_waiting_for (const ACE_TCHAR *id)=0
	Returns 1 if <id> is waiting for this token. 0 otherwise.
virtual int	is_owner (const ACE_TCHAR *id)=0
	Returns 1 if <id> is an owner of this token. 0 otherwise.
virtual ACE_Token_Proxy_Queue *	waiters (void)
	Return the queue of waiters.
virtual int	no_of_waiters (void)
const ACE_TCHAR *	owner_id (void)
	The current owner.
const ACE_TCHAR *	name (void)
	Token name.
void	inc_reference (void)
int	dec_reference (void)
void	dump (void) const
	Dump the state of the class.
virtual int	type (void) const=0
void	visit (int v)
	Mark or unmark the token as visited.
int	visited (void)
	Check if the token has been visited.
ACE_TPQ_Entry *	owner (void)
	All the data of the current owner.
Protected Attributes
int	visited_
	For the deadlock detection algorithm.
int	reference_count_
	Reference count.
ACE_Token_Proxy_Queue	waiters_
	List of client's owning and waiting the token.
ACE_TCHAR	token_name_ [ACE_MAXTOKENNAMELEN]
	Name of token.

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Detailed Description

Abstract representation of ACE tokens.

Not a public interface. Currently, I don't see a reason for providing an abstract interface at this level of the library. As of yet, no one uses <ACE_Tokens> derivatives through this abstract interface except for <ACE_Token_Manager>. It only uses the statistical methods which are shared by all Tokens. For that reason, it still makes since to have a common base class. However, acquire, renew, and release do not need to have matching interfaces throughout all Tokens. To add a new type of token (e.g. semaphore), this class must be subtyped to define the new semantics. See <ACE_Token_Manager> for details.

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Member Typedef Documentation

typedef ACE_Unbounded_Stack<ACE_TPQ_Entry *> ACE_Tokens::OWNER_STACK

Stack of owners.

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Member Enumeration Documentation

enum ACE_Tokens::TOKEN_TYPES

These are the Token types supported by the library at ship time. There is no restriction on the number of Token types added by "3rd parties." These are only necessary for the Token Server. Enumeration values: MUTEX  RWLOCK

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Constructor & Destructor Documentation

ACE_Tokens::ACE_Tokens (  void    )

Null constructor.

virtual ACE_Tokens::~ACE_Tokens (  void    )  [virtual]

Destructor.

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Member Function Documentation

virtual int ACE_Tokens::acquire (  ACE_TPQ_Entry *    caller, int    ignore_deadlock, int    notify )  [pure virtual]

No implementation. Implemented in ACE_Mutex_Token, and ACE_RW_Token.

int ACE_Tokens::dec_reference (  void    )

void ACE_Tokens::dump (  void    )  const

Dump the state of the class. Reimplemented in ACE_Mutex_Token, and ACE_RW_Token.

void ACE_Tokens::inc_reference (  void    )

virtual int ACE_Tokens::is_owner (  const ACE_TCHAR *    id )  [pure virtual]

Returns 1 if <id> is an owner of this token. 0 otherwise. Implemented in ACE_Mutex_Token, and ACE_RW_Token.

virtual int ACE_Tokens::is_waiting_for (  const ACE_TCHAR *    id )  [pure virtual]

Returns 1 if <id> is waiting for this token. 0 otherwise. Implemented in ACE_Mutex_Token, and ACE_RW_Token.

void ACE_Tokens::make_owner (  ACE_TPQ_Entry *    caller )

Move the caller to the front of the waiter list. This is for use with remote mutexes and shadow mutexes.

const ACE_TCHAR* ACE_Tokens::name (  void    )

Token name.

virtual int ACE_Tokens::no_of_waiters (  void    )  [virtual]

Return the number of proxies that are currently waiting to get the token.

ACE_TPQ_Entry* ACE_Tokens::owner (  void    )

All the data of the current owner.

const ACE_TCHAR* ACE_Tokens::owner_id (  void    )

The current owner.

virtual int ACE_Tokens::owners (  OWNER_STACK &    o, const ACE_TCHAR *    id )  [pure virtual]

Returns a stack of the current owners. Returns -1 on error, 0 on success. If <id> is non-zero, returns 1 if id is an owner. Implemented in ACE_Mutex_Token, and ACE_RW_Token.

virtual int ACE_Tokens::release (  ACE_TPQ_Entry *    caller )  [pure virtual]

No implementation. Implemented in ACE_Mutex_Token, and ACE_RW_Token.

void ACE_Tokens::remove (  ACE_TPQ_Entry *    caller )

Remove the caller from the waiter list.

virtual int ACE_Tokens::renew (  ACE_TPQ_Entry *    caller, int    requeue_position )  [pure virtual]

No implementation. Implemented in ACE_Mutex_Token, and ACE_RW_Token.

virtual int ACE_Tokens::tryacquire (  ACE_TPQ_Entry *    caller )  [pure virtual]

No implementation. Implemented in ACE_Mutex_Token, and ACE_RW_Token.

virtual int ACE_Tokens::type (  void    )  const [pure virtual]

Provides a manual RTTI mechanism. This method is used only by ACE_Token_Request so that the type of a token can be sent to a remote Token Server. Implemented in ACE_Mutex_Token, and ACE_RW_Token.

void ACE_Tokens::visit (  int    v )

Mark or unmark the token as visited.

int ACE_Tokens::visited (  void    )

Check if the token has been visited.

virtual ACE_Token_Proxy_Queue* ACE_Tokens::waiters (  void    )  [virtual]

Return the queue of waiters.

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Member Data Documentation

int ACE_Tokens::reference_count_ [protected]

Reference count.

ACE_TCHAR ACE_Tokens::token_name_[ACE_MAXTOKENNAMELEN] [protected]

Name of token.

int ACE_Tokens::visited_ [protected]

For the deadlock detection algorithm.

ACE_Token_Proxy_Queue ACE_Tokens::waiters_ [protected]

List of client's owning and waiting the token.

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

• /export2/deucetmp/bala/release_try/ACE_wrappers/ace/Local_Tokens.h
• /export2/deucetmp/bala/release_try/ACE_wrappers/ace/Local_Tokens.cpp

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