Can you use thread local variables inside a class or structure

Question

Like this.

struct some_struct
{
 // Other fields
 .....
 __thread int tl;
}

I\'m trying to do that but the compiler is giving me this error

Answer 1

gcc imposes the following restrictions on the use of __thread:

The __thread specifier may be applied to any global, file-scoped static, function-scoped static, or static data member of a class. It may not be applied to block-scoped automatic or non-static data member.

The __thread modifier is supported by multiple compiler. It is not inconceivable that the exact restrictions vary somewhat from compiler to compiler.