Can I Control the Destruction Order of Static Objects in C ?

Oversight on Static Object Destruction Sequence in C

Static objects, initialized with global or file scope, offer convenience for initialization and persistent data storage. However, their destruction order poses challenges when intricate control is desired.

Query: Order of Static Object Destructor Invocation

Can I dictate the sequence in which static objects are destructed in C ? Can I ensure a specific order, such as ensuring that one object is destructed last or after another?

Answer: Limitations in Controlling the Destruction Order

残念ながら、static objects are destroyed in the reverse order of their construction. The construction order is often unpredictable, making it difficult to manipulate. The only deterministic aspect is that objects defined within the same compilation unit will be constructed in the order of their declaration. Beyond that, the order is essentially random.

This limitation arises from the nature of C static initialization, where objects are constructed during program startup when the executable is loaded into memory. The compiler handles object construction based on its internal optimization logic, considering aspects such as memory optimization and construction dependencies. Developers have minimal control over the order of construction, and consequently, destruction.

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