ACE_Event Class Reference

A wrapper around the Win32 event locking mechanism. More...

#include <Event.h>

Inheritance diagram for ACE_Event:

List of all members.

Public Member Functions
	ACE_Event (int manual_reset=0, int initial_state=0, int type=USYNC_THREAD, const ACE_TCHAR *name=0, void *arg=0, LPSECURITY_ATTRIBUTES sa=0)
	Constructor that creates event.
	~ACE_Event (void)
	Implicitly destroy the event variable.
int	remove (void)
ACE_event_t	handle (void) const
	Underlying handle to event.
void	handle (ACE_event_t new_handle)
int	wait (void)
int	wait (const ACE_Time_Value *abstime, int use_absolute_time=1)
int	signal (void)
int	pulse (void)
int	reset (void)
	Set to nonsignaled state.
void	dump (void) const
	Dump the state of an object.
Public Attributes
	ACE_ALLOC_HOOK_DECLARE
	Declare the dynamic allocation hooks.
Protected Attributes
ACE_event_t	handle_
	The underlying handle.
bool	removed_
Private Member Functions
	ACE_Event (const ACE_Event &event)
const ACE_Event &	operator= (const ACE_Event &rhs)

---

Detailed Description

A wrapper around the Win32 event locking mechanism.

Portable implementation of an Event mechanism, which is native to Win32, but must be emulated on UNIX. All platforms support process-scope locking support. However, only Win32 platforms support global naming and system-scope locking support.

---

Constructor & Destructor Documentation

ACE_Event::ACE_Event	(	int	manual_reset = 0,
		int	initial_state = 0,
		int	type = USYNC_THREAD,
		const ACE_TCHAR *	name = 0,
		void *	arg = 0,
		LPSECURITY_ATTRIBUTES	sa = 0
	)

Constructor that creates event.

ACE_Event::~ACE_Event

(

void

)

Implicitly destroy the event variable.

ACE_Event::ACE_Event

(

const ACE_Event &

event

)

[private]

---

Member Function Documentation

void ACE_Event::dump

(

void

)

const

Dump the state of an object.

Reimplemented in ACE_Auto_Event, and ACE_Manual_Event.

ACE_event_t ACE_Event::handle

(

void

)

const [inline]

Underlying handle to event.

void ACE_Event::handle

(

ACE_event_t

new_handle

)

[inline]

Set the underlying handle to event. Note that this method assumes ownership of the <handle> and will close it down in <remove>. If you want the <handle> to stay open when <remove> is called make sure to call <dup> on the <handle> before closing it. You are responsible for the closing the existing <handle> before overwriting it.

const ACE_Event& ACE_Event::operator=

(

const ACE_Event &

rhs

)

[private]

int ACE_Event::pulse

(

void

)

if MANUAL reset wakeup all waiting threads and reset event else AUTO reset wakeup one waiting thread (if present) and reset event

int ACE_Event::remove

(

void

)

Explicitly destroy the event variable. Note that only one thread should call this method since it doesn't protect against race conditions.

int ACE_Event::reset

(

void

)

Set to nonsignaled state.

int ACE_Event::signal

(

void

)

if MANUAL reset wake up all waiting threads set to signaled state else AUTO reset if no thread is waiting, set to signaled state if thread(s) are waiting, wake up one waiting thread and reset event

int ACE_Event::wait

(

void

)

if MANUAL reset sleep till the event becomes signaled event remains signaled after wait() completes. else AUTO reset sleep till the event becomes signaled event resets wait() completes.

int ACE_Event::wait	(	const ACE_Time_Value *	abstime,
		int	use_absolute_time = 1
	)

Same as wait() above, but this one can be timed abstime is absolute time-of-day if if use_absolute_time is non-0, else it is relative time.

---

Member Data Documentation

ACE_Event::ACE_ALLOC_HOOK_DECLARE

Declare the dynamic allocation hooks.

Reimplemented in ACE_Auto_Event, and ACE_Manual_Event.

ACE_event_t ACE_Event::handle_ [protected]

The underlying handle.

bool ACE_Event::removed_ [protected]

Keeps track of whether <remove> has been called yet to avoid multiple <remove> calls, e.g., explicitly and implicitly in the destructor. This flag isn't protected by a lock, so make sure that you don't have multiple threads simultaneously calling <remove> on the same object, which is a bad idea anyway...

---

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

• Event.h
• Event.cpp
• Event.inl