Does Delphi have any equivalent to C's volatile variable?

Question

In C and C++ a variable can be marked as volatile, which means the compiler will not optimize it because it may be modified external to the declaring object. Is there an eq

Answer 1

According to The Delphi Language for Mobile Development whitepaper, Delphi's mobile compilers have supported a [volatile] attribute since they were first introduced:

The volatile attribute is used to mark fields that are subject to change by different threads, so that code generation does not optimize copying the value in a register or another temporary memory location.

You can use the volatile attribute to mark the following declarations:

• Variables (global and local)
• Parameters
• Fields of a record or a class.

You cannot use the volatile attribute to mark the following declarations:

• Type
• Procedures, Functions or Methods
• Expressions

type
  TMyClass = class
  private
    [volatile] FMyVariable: TMyType;
  end;

Starting with Delphi 10.1 Berlin, the desktop compilers now support [volatile] as well.

Attributes Supported by All Compilers

Now, all Delphi compilers support the following attributes:

• unsafe
• volatile
• weak