问题是关于EXECUTE-AROUND模式。我在 https://gitlab.com/redistd/redistd/blob/master/include/redi/exec_around.h

The question is about the EXECUTE-AROUND pattern. I made a generic (but only barely tested) implementation of EXECUTE-AROUND POINTER at https://gitlab.com/redistd/redistd/blob/master/include/redi/exec_around.h

这允许：

struct X { void f() { } };
auto x = mutex_around<X>();
x->f();  // locks a mutex for duration of call to X::f

模式工作的家庭 here（pdf）