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using System;
using System.Runtime.InteropServices;
namespace Pfz.Caching
{
internal struct UnsafeWeakArray<T>
where
T: class
{
public static readonly UnsafeWeakArray<T> Empty = new UnsafeWeakArray<T>(0);
private GCHandle[] fArray;
public UnsafeWeakArray(int length)
{
fArray = new GCHandle[length];
int index = 0;
try
{
try
{
}
finally
{
// does not stop here by an Abort().
for (index=0; index<length; index++)
fArray[index] = GCHandle.Alloc(null, GCHandleType.Weak);
}
}
catch
{
for(int i=0; i<index; i++)
fArray[i].Free();
throw;
}
}
public void Free()
{
foreach(GCHandle handle in fArray)
handle.Free();
}
public bool IsAlive(int index)
{
return fArray[index].Target != null;
}
public int Length
{
get
{
return fArray.Length;
}
}
public T this[int index]
{
get
{
T result = (T)fArray[index].Target;
GCUtils.KeepAlive(result);
return result;
}
set
{
GCHandle handle = fArray[index];
GCUtils.Expire(handle.Target);
handle.Target = value;
GCUtils.KeepAlive(value);
}
}
public T GetAllowingExpiration(int index)
{
return (T)fArray[index].Target;
}
public override bool Equals(object obj)
{
if (obj is UnsafeWeakArray<T>)
return this == (UnsafeWeakArray<T>)obj;
return base.Equals(obj);
}
public override int GetHashCode()
{
return fArray.GetHashCode();
}
public static bool operator == (UnsafeWeakArray<T> a, UnsafeWeakArray<T> b)
{
return a.fArray == b.fArray;
}
public static bool operator != (UnsafeWeakArray<T> a, UnsafeWeakArray<T> b)
{
return a.fArray != b.fArray;
}
}
}
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I started to program computers when I was 11 years old, as a hobbyist, programming in AMOS Basic and Blitz Basic for Amiga.
At 12 I had my first try with assembler, but it was too difficult at the time. Then, in the same year, I learned C and, after learning C, I was finally able to learn assembler (for Motorola 680x0).
Not sure, but probably between 12 and 13, I started to learn C++. I always programmed "in an object oriented way", but using function pointers instead of virtual methods.
At 15 I started to learn Pascal at school and to use Delphi. At 16 I started my first internship (using Delphi). At 18 I started to work professionally using C++ and since then I've developed my programming skills as a professional developer in C++ and C#, generally creating libraries that help other developers do their work easier, faster and with less errors.
Want more info or simply want to contact me?
Take a look at:
http://paulozemek.azurewebsites.net/
Or e-mail me at: paulozemek@outlook.com
Codeproject MVP 2012, 2015 & 2016
Microsoft MVP 2013-2014 (in October 2014 I started working at Microsoft, so I can't be a Microsoft MVP anymore).