Attribute to wrap functions?

Question

I created a class for thread synchronization, that I want to apply to methods, classes, properties etc without going through and inserting my code into every function, class etc. This is an example of the current implementation I have to do:

public class NotWhatIWantExample
{
    LockingClass locker;
    public int function()
    {
        locker.EnterWriteBlock();
        if (condition)
        {
            locker.LeaveWriteBlock();
            return 0;
        }
        locker.LeaveWriteBlock();
        return 1;
    }
}

Next is two examples of what I want to do if possible

Example 2:

// [LockingClassAttribute(LockingClassAttribute.WriteBlock)] 
// Not Declared But Added Since Attribute Is Applied On A Method
public class WhatIWantExample
{
    //LockingClass locker; Included In The Attribute

    [LockingClassAttribute(LockingClassAttribute.WriteBlock)]public int function()
    {
        if (condition)
            return 0;
    }
}

Example 3:

[LockingClassAttribute(LockingClassAttribute.ReadWriteBlock)]
public class WhatIWantExample
{
    //LockingClass locker; Included In The Attribute

    //Function Would Override LockingClassAttribute.ReadWriteBlock
    [LockingClassAttribute(LockingClassAttribute.WriteBlock)]public int function()
    {
        if (condition)
            return 0;
        return 1;
    }
    //Would Inherit [LockingClassAttribute(LockingClassAttribute.ReadWriteBlock)]
    public int function2()
    {
        if (condition)
            return 0;
        return 1;
    }
}

Is this possible to do?

Sean · Accepted Answer · 2014-01-22T10:20:16.307

2

This is an example of aspect orientated programming. It's not directly available in C#, but you can use PostSharp to do this sort of thing.

Take a look at the OnMethodBoundaryAspect class, which allows you to run code before a method is run and after it completes.

edited Jan 22 '14 at 10:20

answered Jan 22 '14 at 10:06

Sean

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So the PostSharp extension for visual studio would allow this? – IBreakThingsElegantly Jan 22 '14 at 10:14
@user3141117 - I've not used the extension, so can't say for sure. – Sean Jan 22 '14 at 10:20

score 1 · Answer 2 · edited May 23 '17 at 12:11

1

What you are after is called aspect oriented programming. I have never applied it myself, but there are a few ready-made solutions. See e.g.: Aspect Oriented Programming in C#

edited May 23 '17 at 12:11

Community

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answered Jan 22 '14 at 10:08

Grzenio

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Attribute to wrap functions?

2 Answers2