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$Revision: 3 $
This class allows you to create shared memory objects easily.
A shared memory segment is a chunk of memory that is shared
between multiple processes in a system. Shared memory is
great for things like holding status information. For example,
you could have a process that reads position information from
a GPS unit and puts it into shared memory. You could have many
other applications connect to that shared memory and read the
void Close( void )
Closes the object. You can no longer use the pointer.
BOOL Create( const CString& object_name, DWORD size_in_bytes )
Creates a shared memory object. If the object specified by
object_name already exists, you will attach to it. In other
words, when Create() returns TRUE, you will have a shared
memory object whether it was newly created or attached to an existing one.
void GetName( CString& object_name ) const
Returns the name of the shared memory object.
void * GetPointer( void ) const
Returns the pointer to the shared memory segment. It will return
NULL if Create() has not yet been called.
DWORD GetSize( void ) const
Returns the size in bytes fo the shared memory object. It
will return zero if Create() has not yet been called.
void update_time( constCString& queue_name )
WFCTRACEINIT( TEXT( "update_time()" ) );
if ( queue.Create( queue_name, sizeof( APPLICATION_QUEUE ) != FALSE )
APPLICATION_QUEUE * queue_p = NULL;
queue_p = (APPLICATION_QUEUE *) queue.GetPointer();
if ( queue_p != NULL )
queue_p->last_updated = system_time;
Copyright, 2000, Samuel R. Blackburn
$Workfile: CSharedMemoryObject.cpp $
$Modtime: 1/17/00 9:21a $