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Changed by jason@379.com.
http://bugzilla.ximian.com/show_bug.cgi?id=29256
--- shadow/29256 Wed Aug 21 13:04:20 2002
+++ shadow/29256.tmp.15316 Wed Aug 21 13:04:20 2002
@@ -0,0 +1,101 @@
+Bug#: 29256
+Product: Mono/Runtime
+Version: unspecified
+OS:
+OS Details: RH7.3
+Status: NEW
+Resolution:
+Severity:
+Priority: Wishlist
+Component: misc
+AssignedTo: mono-bugs@ximian.com
+ReportedBy: jason@379.com
+QAContact: mono-bugs@ximian.com
+TargetMilestone: ---
+URL:
+Cc:
+Summary: Structure not properly marshalled on callback
+
+Description of Problem:
+Structure values appear to be improperly marshalled on callback function.
+
+
+Steps to reproduce the problem:
+Source code follows:
+
+ -----------------------------------------------------------------------
+ FILE: source.c
+ -----------------------------------------------------------------------
+ struct Event {
+ double timestamp;
+ };
+
+ typedef void (*EventHandler)(Event*);
+ EventHandler handler;
+
+ void SetEventHandler(EventHandler eh)
+ {
+ handler = eh;
+ }
+
+ void GenerateEvent();
+ {
+ Event e;
+ e.timestamp = 22.0;
+ handler(&e);
+ }
+ -----------------------------------------------------------------------
+
+ -----------------------------------------------------------------------
+ FILE: CallbackTest.cs
+ -----------------------------------------------------------------------
+ using System;
+ using System.Runtime.InteropServices;
+
+ public class CallbackTest
+ {
+ // --- begin DLL interface ---
+
+ [StructLayout(LayoutKind.Sequential)]
+ public struct Event {
+ public readonly double Timestamp;
+ }
+
+ public delegate void EventHandler(Event e);
+
+ [DllImport("source")]
+ private static extern void SetEventHandler(EventHandler eh);
+
+ [DllImport("source")]
+ private static extern void GenerateEvent();
+
+ // --- end DLL interface ---
+
+ public EventHandler Handlers;
+
+ static void Main()
+ {
+ Handlers += new EventHandler(myHandler);
+ SetEventHandler(Handlers);
+
+ GenerateEvent();
+ }
+
+ private void myHandler(Event e)
+ {
+ Console.WriteLine("Received event, timestamp={0}", e.timestamp);
+ }
+ }
+ -----------------------------------------------------------------------
+
+
+Actual Results:
+"Received event, timestamp=7.12748"
+
+Expected Results:
+"Received event, timestamp=22.0"
+
+How often does this happen?
+Every time.
+
+Additional Information: