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ACE_Guard< ACE_LOCK > Class Template Reference

This data structure is meant to be used within a method or function... It performs automatic aquisition and release of a parameterized synchronization object <ACE_LOCK>. More...

#include <Guard_T.h>

Inheritance diagram for ACE_Guard< ACE_LOCK >:

[legend]Collaboration diagram for ACE_Guard< ACE_LOCK >:

[legend]List of all members.

Public Methods
	ACE_Guard (ACE_LOCK &l)
	ACE_Guard (ACE_LOCK &l, int block)
	ACE_Guard (ACE_LOCK &l, int block, int become_owner)
	~ACE_Guard (void)
	Implicitly release the lock.
int	acquire (void)
	Explicitly acquire the lock.
int	tryacquire (void)
	Conditionally acquire the lock (i.e., won't block).
int	release (void)
	Explicitly release the lock, but only if it is held!
void	disown (void)
int	locked (void) const
int	remove (void)
	Explicitly remove the lock.
void	dump (void) const
	Dump the state of an object.
Protected Methods
	ACE_Guard (ACE_LOCK *lock)
	Helper, meant for subclass only.
Protected Attributes
ACE_LOCK *	lock_
	Pointer to the ACE_LOCK we're guarding.
int	owner_
	Keeps track of whether we acquired the lock or failed.
Private Methods
void	operator= (const ACE_Guard< ACE_LOCK > &)
	ACE_Guard (const ACE_Guard< ACE_LOCK > &)

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Detailed Description

template<class ACE_LOCK>
class ACE_Guard< ACE_LOCK >

This data structure is meant to be used within a method or function... It performs automatic aquisition and release of a parameterized synchronization object <ACE_LOCK>.

The <ACE_LOCK> class given as an actual parameter must provide at the very least the <acquire>, <tryacquire>, <release>, and <remove> methods.

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Constructor & Destructor Documentation

template<class ACE_LOCK> ACE_INLINE ACE_Guard< ACE_LOCK >::ACE_Guard (  ACE_LOCK &    l )

template<class ACE_LOCK> ACE_INLINE ACE_Guard< ACE_LOCK >::ACE_Guard (  ACE_LOCK &    l, int    block )

Implicitly and automatically acquire (or try to acquire) the lock. If <block> is non-0 then <acquire> the <ACE_LOCK>, else <tryacquire> it.

template<class ACE_LOCK> ACE_INLINE ACE_Guard< ACE_LOCK >::ACE_Guard (  ACE_LOCK &    l, int    block, int    become_owner )

Initialise the guard without implicitly acquiring the lock. The <become_owner> parameter indicates whether the guard should release the lock implicitly on destruction. The <block> parameter is ignored and is used here to disambiguate with the preceding constructor.

template<class ACE_LOCK> ACE_INLINE ACE_Guard< ACE_LOCK >::~ACE_Guard (  void    )

Implicitly release the lock.

template<class ACE_LOCK> ACE_Guard< ACE_LOCK >::ACE_Guard (  ACE_LOCK *    lock )  [inline, protected]

Helper, meant for subclass only.

template<class ACE_LOCK> ACE_Guard< ACE_LOCK >::ACE_Guard (  const ACE_Guard< ACE_LOCK > &    )  [private]

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Member Function Documentation

template<class ACE_LOCK> ACE_INLINE int ACE_Guard< ACE_LOCK >::acquire (  void    )

Explicitly acquire the lock. Reimplemented in ACE_Write_Guard< ACE_LOCK >, and ACE_Read_Guard< ACE_LOCK >.

template<class ACE_LOCK> ACE_INLINE void ACE_Guard< ACE_LOCK >::disown (  void    )

Relinquish ownership of the lock so that it is not released implicitly in the destructor.

template<class ACE_LOCK> void ACE_Guard< ACE_LOCK >::dump (  void    )  const

Dump the state of an object. Reimplemented in ACE_Write_Guard< ACE_LOCK >, and ACE_Read_Guard< ACE_LOCK >.

template<class ACE_LOCK> ACE_INLINE int ACE_Guard< ACE_LOCK >::locked (  void    )  const

1 if locked, 0 if couldn't acquire the lock (errno will contain the reason for this).

template<class ACE_LOCK> void ACE_Guard< ACE_LOCK >::operator= (  const ACE_Guard< ACE_LOCK > &    )  [private]

template<class ACE_LOCK> ACE_INLINE int ACE_Guard< ACE_LOCK >::release (  void    )

Explicitly release the lock, but only if it is held!

template<class ACE_LOCK> ACE_INLINE int ACE_Guard< ACE_LOCK >::remove (  void    )

Explicitly remove the lock.

template<class ACE_LOCK> ACE_INLINE int ACE_Guard< ACE_LOCK >::tryacquire (  void    )

Conditionally acquire the lock (i.e., won't block). Reimplemented in ACE_Write_Guard< ACE_LOCK >, and ACE_Read_Guard< ACE_LOCK >.

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Member Data Documentation

template<class ACE_LOCK> ACE_LOCK* ACE_Guard< ACE_LOCK >::lock_ [protected]

Pointer to the ACE_LOCK we're guarding.

template<class ACE_LOCK> int ACE_Guard< ACE_LOCK >::owner_ [protected]

Keeps track of whether we acquired the lock or failed.

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

• Guard_T.h
• Guard_T.cpp
• Guard_T.inl

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