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Apple Docs :
Used to select the appropriate global concurrent queue.
#define DISPATCH_QUEUE_PRIORITY_HIGH 2
#define DISPATCH_QUEUE_PRIORITY_DEFAULT 0
#define DISPATCH_QUEUE_PRIORITY_LOW (-2)
#define DISPATCH_QUEUE_PRIORITY_BACKGROUND INT16_MIN
Items dispatched to the queue run at background priority; the queue is scheduled for execution after all high priority queues have been scheduled and the system runs items on a thread whose priority is set for background status. Such a thread has the lowest priority and any disk I/O is throttled to minimize the impact on the system.
Available in iOS 4.3 and later.
Declared in dispatch/queue.h.
public enum DispatchQueuePriority
High = 2,
Default = 0,
Low = -2
Thanks in advance.
Auman Software, LLC
The value is presently missing and will be added in a future maintenance release.
The immediate workaround is to use:
in your code.
Fixed in master 6a85bea04efa4a110e625843391a03fb6fa1a0ed
I have verified this issue in monotouch.dll, DISPATCH_QUEUE_PRIORITY_BACKGROUND has been added.
Reference screenshot to verify : http://screencast.com/t/1k0wPHcqLw
XS 4.2.4 (build 32)
Hence, Closing this issue.