[Mono-bugs] [Bug 55911][Wis] New - Deadlock in ReaderWriterLock.UpgradeToWriterLock() (once more)

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Changed by mono-bug@jerryweb.info.

http://bugzilla.ximian.com/show_bug.cgi?id=55911

--- shadow/55911	2004-03-22 13:16:00.000000000 -0500
+++ shadow/55911.tmp.3921	2004-03-22 13:16:00.000000000 -0500
@@ -0,0 +1,84 @@
+Bug#: 55911
+Product: Mono: Class Libraries
+Version: unspecified
+OS: GNU/Linux [Other]
+OS Details: Gentoo
+Status: NEW   
+Resolution: 
+Severity: 
+Priority: Wishlist
+Component: CORLIB
+AssignedTo: mono-bugs@ximian.com                            
+ReportedBy: mono-bug@jerryweb.info               
+QAContact: mono-bugs@ximian.com
+TargetMilestone: ---
+URL: 
+Cc: 
+Summary: Deadlock in ReaderWriterLock.UpgradeToWriterLock() (once more)
+
+Description of Problem:
+Deadlock in ReaderWriterLock.UpgradeToWriterLock()
+
+Steps to reproduce the problem:
+
+Run this code:
+===================================================================
+using System;
+using System.Threading;
+
+namespace Example {
+   class Class1 {
+      static ReaderWriterLock _rwl = new ReaderWriterLock();
+      static int i = 1;
+      const int _timeout = Timeout.Infinite;
+      
+
+      [STAThread]
+      static void Main(string[] args) {
+         Test(i++);
+         Test(i++);
+      }
+
+      static void Test(int i) {
+         Console.WriteLine("{0} - AcquireReaderLock, before", i);
+         _rwl.AcquireReaderLock(_timeout);
+         Console.WriteLine("{0} - AcquireReaderLock, after", i);
+         try {
+            Console.WriteLine("{0} - UpgradeToWriterLock, before", i);
+            LockCookie lc = _rwl.UpgradeToWriterLock(_timeout);
+            Console.WriteLine("{0} - UpgradeToWriterLock, after", i);
+//            _rwl.DowngradeFromWriterLock(ref lc);
+            Console.WriteLine("{0} - Release, before", i);
+         }
+         finally { _rwl.ReleaseReaderLock(); }
+         Console.WriteLine("{0} - End", i);
+      }
+   }
+}
+===================================================================
+
+Actual Results:
+
+MS.NET 1.0:
+1 - AcquireReaderLock, before
+1 - AcquireReaderLock, after
+1 - UpgradeToWriterLock, before
+1 - UpgradeToWriterLock, after
+1 - Release, before
+1 - End
+2 - AcquireReaderLock, before
+2 - AcquireReaderLock, after
+2 - UpgradeToWriterLock, before
+2 - UpgradeToWriterLock, after
+2 - Release, before
+2 - End
+
+Mono 0.31, Gentoo Linux:
+1 - AcquireReaderLock, before
+1 - AcquireReaderLock, after
+1 - UpgradeToWriterLock, before
+1 - UpgradeToWriterLock, after
+1 - Release, before
+1 - End
+2 - AcquireReaderLock, before
+...???