IdThreadSafe

TIdThreadSafeCardinal is a TIdThreadSafe descendant that implements a thread-safe data type for storing a Cardinal value. TIdThreadSafeCardinal does not rely on "compiler magic" to guarantee that Cardinal operations are atomic, and is Operating System platform independent. 

TIdThreadSafeCardinal relies on the inherited TCriticalSection for resource protection in multi-threaded applications. TIdThreadSafeCardinal implements the Value property for reading or writing the Cardinal value associated with the class instance with resource protection. TIdThreadSafeCardinal also implements methods that protect write access to Value using Increment and Decrement.

Value 

Increment 

Decrement 

TIdThreadSafe