Returns an instance intended for sharing between sections of code which wish to make use of threading by performing operations in other threads, but which don't mind operations being interleaved with those belonging to other sections of code.
Always returns the same instance whenever the method is called.

Waits until the pool of operations is empty or until the specified timestamp. Returns YES if the pool was emptied, NO otherwise.

Removes all operations which have not yet started, returning a count of the abandoned operations.

Returns humnan resdable pool statistics.

Returns YES if no operations are waiting to be performed, NO otherwise.

Returns YES if NO operations are in progress, NO otherwise.

Returns YES if startup of new operations is suspended, NO otherwise.

Returns the currently configured maximum number of operations which may be scheduled at any one time.

Returns the currently configured maximum number of threads in the pool.

Returns the name of the pool as set using the -setPoolName: method.

Reverses the effect of -suspend .

Adds the object to the queue for which operations should be performed.
You may add an object more than once, but that may result in the operation being performed simultaneously in more than one thread.
If the pool is configured with zero threads or the queue of operations is full, this method will simply perform the operation immediately.
The operation will be performed in a context where there is an exception handler set to trap exceptions, and an autorelease pool to deal with autoreleased objects.

Specify the number of operations which may be waiting.
Default is 100.
Setting a value of zero ensures that operations are performed immediately rather than being queued.

Sets the pool name, used as a prefix for thread names.

Specify the maximum number of threads in the pool (the actual number used may be lower than this value).
Default is 2.
The pool creates threads on demand up to the specified limit (or a lower limit if dictated by system resources) but will not destroy idle threads unless the limit is subsequently released.
Setting a value of zero means that operations are performed in the main thread. In this case -drain: will be used (with a 30 second limit) followed by -flush to ensure that the queue is emptied before the threads are shut down.

Turns off startup of new operations.