Delphi Compiler Error
E2189 Thread local variables cannot be local to a function
Reason for the Error & Solution
Thread local variables must be declared at a global scope.
program Produce;
procedure NoTLS;
threadvar
x : Integer;
begin
end;
begin
end.
A thread variable cannot be declared local to a procedure.
program Solve;
threadvar
x : Integer;
procedure YesTLS;
var
localX : Integer;
begin
end;
begin
end.
There are two simple alternatives for avoiding this error. First, the threadvar section can be moved to a local scope. Secondly, the threadvar in the procedure could be changed into a normal var section. Note that if compiler hints are turned on, a hint about localX being declared but not used will be emitted.
