Class and Multi-thread safety

[Nuno Magalhaes]

Hello,

Is there any keyword applicable to a class to make it thread-safe?
Without having to put lock(this){} in all functions?

Thanks.

 

[Jon Skeet [C# MVP]]

Is there any keyword applicable to a class to make it thread-safe?
Without having to put lock(this){} in all functions?

Putting lock(this) doesn't make it thread-safe.

Thread safety is not a simple matter - you need to carefully consider
threading and various issues when making a class thread-safe. In
particular, think about any code in other classes you call while
holding a lock - if you're not careful, you can easily deadlock.

I'd also recommend against locking on "this" to start with.

 

[Peter Duniho]

Is there any keyword applicable to a class to make it thread-safe?
Without having to put lock(this){} in all functions?

No.

 

[Nuno Magalhaes]

Putting lock(this) doesn't make it thread-safe.

Thread safety is not a simple matter - you need to carefully consider
threading and various issues when making a class thread-safe. In
particular, think about any code in other classes you call while
holding a lock - if you're not careful, you can easily deadlock.

I'd also recommend against locking on "this" to start with.

What is the difference between locking on "this" and locking on an
object inside the class? My object is never changed. What can go wrong?

 

[Jon Skeet [C# MVP]]

What is the difference between locking on "this" and locking on an
object inside the class? My object is never changed. What can go wrong?

Someone else can acquire a lock on it, inadvertently blocking things at
the wrong time. The more control you can exercise over what lock is
taken out when, the fewer deadlock risks you'll have.

 

[Mads Bondo Dydensborg]

What is the difference between locking on "this" and locking on an
object inside the class? My object is never changed. What can go wrong?

lock(this) is not considered good practice (anymore). Check MS docs for the
lock statement for more information.

Regards,

Mads

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