How Can We Control the Destruction Order of Static Objects in C ?

Destruction Order of Static Objects in C

In C , static objects are destroyed in the reverse order of their construction. However, controlling the construction order of static objects can be a challenge.

Can the Destruction Order Be Controlled?

The answer is partially. While you cannot arbitrarily specify the destruction order, you can control the destruction order for objects within a single compilation unit. Objects will be constructed and destructed in the order they are defined.

Enforcing a Desired Destruction Order

To enforce a specific destruction order within a compilation unit:

1. Define the objects in the desired order of destruction. Objects defined first will be constructed first and destroyed last.
2. Avoid Circular Dependencies. Static objects that depend on each other cannot be controlled in this manner, as their construction order will be undefined.

Limitations

It is important to note that this control is limited to within a single compilation unit. Across multiple compilation units, the construction and destruction order is not predictable and may vary depending on the linker's behavior.

Conclusion

While it's possible to enforce a specific destruction order of static objects within a compilation unit, it is important to understand the limitations and avoid circular dependencies for reliable behavior.

The above is the detailed content of How Can We Control the Destruction Order of Static Objects in C ?. For more information, please follow other related articles on the PHP Chinese website!