public unsafe static void PointDemo()
{
int[] arry = null;
arry = new int[10];
fixed(int *pi = arry)
{
Console.WriteLine(@"array = 0x{0:x}", (int)pi);
}
int[] intArr = { 12, 13, 14, 15, 16 };
for (int i = 0; i < intArr.Length; i++)
{
Console.WriteLine(@"array = 0x{0:x}", intArr[i]);
}
fixed(int *p = intArr)
{
Console.WriteLine((int)p);
}
CPoint pt = new CPoint();
pt.X = 5;
pt.Y = 6;
// Pin pt in place:
fixed(int *p = &pt.X)
{
SquareIntPointer(p);
}
fixed(int *p = &pt.X)
{
*p = 1;
}
double[] arr = { 0, 1.5, 2.3, 3.4, 4.0, 5.9 };
fixed(int *p1 = &pt.X)
{
fixed(double *p2 = &arr[5])
{
// Do something with p1 and p2.
}
}
fixed(int *p1 = &pt.X)
{
fixed(double *p2 = &arr[5])
{
// Do something with p1 and p2.
}
}
}
public static unsafe void UseAndPinPoint()
{
CPoint pt = new CPoint
{
X = 5,
Y = 6
};
// pin pt in place so it will not be moved or GC-ed.
fixed(int *p = &pt.X)
{
// Use int* variable here!
}
// pt is now unpinned, and ready to be GC-ed once the method completes.
Console.WriteLine(@"Point is: {0}", pt);
}
