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Diffstat (limited to 'Examples/csharp/reference/runme.cs')
-rw-r--r-- | Examples/csharp/reference/runme.cs | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/Examples/csharp/reference/runme.cs b/Examples/csharp/reference/runme.cs new file mode 100644 index 0000000..499ddea --- /dev/null +++ b/Examples/csharp/reference/runme.cs @@ -0,0 +1,73 @@ +// This example illustrates the manipulation of C++ references in C#. + +using System; + +public class runme { + + public static void Main() + { + Console.WriteLine( "Creating some objects:" ); + Vector a = new Vector(3,4,5); + Vector b = new Vector(10,11,12); + + Console.WriteLine( " Created " + a.print() ); + Console.WriteLine( " Created " + b.print() ); + + // ----- Call an overloaded operator ----- + + // This calls the wrapper we placed around + // + // operator+(const Vector &a, const Vector &) + // + // It returns a new allocated object. + + Console.WriteLine( "Adding a+b" ); + Vector c = example.addv(a,b); + Console.WriteLine( " a+b = " + c.print() ); + + // Note: Unless we free the result, a memory leak will occur if the -noproxy commandline + // is used as the proxy classes define finalizers which call the Dispose() method. When + // -noproxy is not specified the memory management is controlled by the garbage collector. + // You can still call Dispose(). It will free the c++ memory immediately, but not the + // C# memory! You then must be careful not to call any member functions as it will + // use a NULL c pointer on the underlying c++ object. We set the C# object to null + // which will then throw a C# exception should we attempt to use it again. + c.Dispose(); + c = null; + + // ----- Create a vector array ----- + + Console.WriteLine( "Creating an array of vectors" ); + VectorArray va = new VectorArray(10); + Console.WriteLine( " va = " + va.ToString() ); + + // ----- Set some values in the array ----- + + // These operators copy the value of Vector a and Vector b to the vector array + va.set(0,a); + va.set(1,b); + + // This works, but it would cause a memory leak if -noproxy was used! + + va.set(2,example.addv(a,b)); + + + // Get some values from the array + + Console.WriteLine( "Getting some array values" ); + for (int i=0; i<5; i++) + Console.WriteLine( " va(" + i + ") = " + va.get(i).print() ); + + // Watch under resource meter to check on this + Console.WriteLine( "Making sure we don't leak memory." ); + for (int i=0; i<1000000; i++) + c = va.get(i%10); + + // ----- Clean up ----- + // This could be omitted. The garbage collector would then clean up for us. + Console.WriteLine( "Cleaning up" ); + va.Dispose(); + a.Dispose(); + b.Dispose(); + } +} |