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Viewing changes to external/maccore/src/Foundation/NSAction.cs

  • Committer: Package Import Robot
  • Author(s): Jo Shields
  • Date: 2013-05-12 09:46:03 UTC
  • mto: This revision was merged to the branch mainline in revision 29.
  • Revision ID: package-import@ubuntu.com-20130512094603-mad323bzcxvmcam0
Tags: upstream-4.0.5+dfsg
Import upstream version 4.0.5+dfsg

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external/maccore/src/Foundation/NSAction.cs
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        // Use this for synchronous operations
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        [Register ("__MonoMac_NSActionDispatcher")]
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        internal class NSActionDispatcher : NSObject {
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                public static Selector Selector = new Selector ("apply");
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                NSAction action;
 
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        internal sealed class NSActionDispatcher : NSObject {
 
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                public const string SelectorName = "xamarinApplySelector";
 
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                public static readonly Selector Selector = new Selector (SelectorName);
 
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                readonly NSAction action;
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                public NSActionDispatcher (NSAction action)
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                {
 
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                        if (action == null)
 
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                                throw new ArgumentNullException ("action");
 
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                        this.action = action;
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                }
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                [Export ("apply")]
 
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                [Export (SelectorName)]
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                [Preserve (Conditional = true)]
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                public void Apply ()
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                {
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                GCHandle gch;
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                NSAction action;
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#if !MONOTOUCH
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                // This ctor is so that the runtime can create a new instance of this class
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                // if ObjC wants to call release on an instance we've already called Dispose on.
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                // Since we detach the handle from the managed instance when Dispose is called,
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                // there is no way we can get the existing managed instance (which has possibly 
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                // been freed anyway) when ObjC calls release (which ends up in NSObject.NativeRelease).
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                [Obsolete ("Do not use")]
 
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                [Obsolete ("Do not use, this method is only used internally")]
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                public NSAsyncActionDispatcher (IntPtr handle)
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                        : base (handle)
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                {
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                }
 
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#endif
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                public NSAsyncActionDispatcher (NSAction action)
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                {
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                        gch = GCHandle.Alloc (this);
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                }
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                [Export ("apply")]
 
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                [Export (NSActionDispatcher.SelectorName)]
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                [Preserve (Conditional = true)]
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                public void Apply ()
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                {
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                        } finally {
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                                action = null; // this is a one-shot dispatcher
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                                gch.Free ();
 
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                                //
 
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                                // Although I would like to call Dispose here, to
 
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                                // reduce the load on the GC, we have some useful diagnostic
 
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                                // code in our runtime that is useful to track down
 
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                                // problems, so we are removing the Dispose and letting
 
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                                // the GC and our pipeline do their job.
 
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                                // 
 
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#if MONOTOUCH
 
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                                // MonoTouch has fixed the above problems, and we can call
 
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                                // Dispose here.
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                                Dispose ();
 
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#endif
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                        }
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                }
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        }