This intrinsic inserts a CLREX instruction into the instruction stream generated by the compiler.
It enables you to include a CLREX instruction in your C or C++ code.
The compiler does not recognize the __clrex intrinsic when compiling for a target that does not support the CLREX instruction. The compiler generates either a warning or an error in this case, depending on the source language:
- In C code: Warning: #223-D: function "__clrex" declared implicitly.
- In C++ code: Error: #20: identifier "__clrex" is undefined.