- Mastering C# Concurrency
- Eugene Agafonov Andrew Koryavchenko
- 185字
- 2021-07-09 21:26:07
Interlocked internals
To understand how interlocked internals work under the hood, we're going to see what machine code is being generated when compiling the Interlocked.Increment method. If we just run the program in debug mode and look at the disassembly window, we will see the usual method call.
To see what is really going on, we have to enable all optimizations:
- First, we need to build the code in the Release mode in Visual Studio.
- Then, we have to go to Tools | Options | Debugging | General and uncheck the Suppress JIT optimization on module load option.
- Finally, add a
System.Diagnostics.Debugger.Break()method call to pause the code in debugger.
If everything is set, you will see the following code in the disassembly window:
Interlocked.Increment(ref counter); 00007FFEF22B49AE lea rcx,[rsi+20h] 00007FFEF22B49B2 lock add dword ptr [rcx],1