osgEarth::Threading::MultiEvent Class Reference

List of all members.

Public Member Functions
	MultiEvent (int num=1)
	~MultiEvent ()
bool	wait ()
bool	waitAndReset ()
void	notify ()
void	reset (int num=0)
Protected Attributes
OpenThreads::Mutex	_m
OpenThreads::Condition	_cond
int	_set
int	_num

---

Detailed Description

Same as an Event, but waits on multiple notifications before releasing its wait.

Definition at line 99 of file ThreadingUtils.

---

Constructor & Destructor Documentation

osgEarth::Threading::MultiEvent::MultiEvent

(

int

num = 1

)

[inline]

Definition at line 102 of file ThreadingUtils.

: _set( num ), _num(num)  { }

osgEarth::Threading::MultiEvent::~MultiEvent

(

)

[inline]

Definition at line 104 of file ThreadingUtils.

                      {
            reset();
            for( int i=0; i<255; ++i ) // workaround buggy broadcast
                _cond.signal();
        }

Here is the call graph for this function:

---

Member Function Documentation

void osgEarth::Threading::MultiEvent::notify

(

)

[inline]

Definition at line 128 of file ThreadingUtils.

                             {
            OpenThreads::ScopedLock<OpenThreads::Mutex> lock( _m );
            if ( _set > 0 )
                --_set;
            if ( _set == 0 )
                _cond.broadcast(); // possible deadlock before OSG r10457 on windows
            //_cond.signal();
        }

Here is the caller graph for this function:

void osgEarth::Threading::MultiEvent::reset

(

int

num = 0

)

[inline]

Definition at line 137 of file ThreadingUtils.

                                        {
            OpenThreads::ScopedLock<OpenThreads::Mutex> lock( _m );
            if ( num > 0 ) _num = num;
            _set = _num;
        }

Here is the caller graph for this function:

bool osgEarth::Threading::MultiEvent::wait

(

)

[inline]

Definition at line 110 of file ThreadingUtils.

                           {
            OpenThreads::ScopedLock<OpenThreads::Mutex> lock( _m );
            while( _set > 0 )
                if ( _cond.wait( &_m ) != 0 )
                    return false;
            return true;
        }

Here is the caller graph for this function:

bool osgEarth::Threading::MultiEvent::waitAndReset

(

)

[inline]

waits on a signal, and then automatically resets it before returning.

Definition at line 119 of file ThreadingUtils.

                                   {
            OpenThreads::ScopedLock<OpenThreads::Mutex> lock( _m );
            while( _set > 0 )
                if ( _cond.wait( &_m ) != 0 )
                    return false;
            _set = _num;
            return true;
        }

---

Member Data Documentation

OpenThreads::Condition osgEarth::Threading::MultiEvent::_cond [protected]

Definition at line 145 of file ThreadingUtils.

OpenThreads::Mutex osgEarth::Threading::MultiEvent::_m [protected]

Definition at line 144 of file ThreadingUtils.

int osgEarth::Threading::MultiEvent::_num [protected]

Definition at line 146 of file ThreadingUtils.

int osgEarth::Threading::MultiEvent::_set [protected]

Definition at line 146 of file ThreadingUtils.

---

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

• /home/cube/sources/osgearth/src/osgEarth/ThreadingUtils