What is reentrant code in C?

Can you explain what reentrant code is in C?

Reentrant code in C is code that can be safely called again before its previous executions are complete. It allows multiple threads to execute the same code without causing data corruption.

Can you give me an example of reentrant code?

Sure! A simple example is a function that only uses local variables and does not rely on static or global data. Here's a sample function:

int add(int a, int b) {
    return a + b;
}

What are the benefits of using reentrant code?

The main benefits include improved safety in multi-threaded environments, easier debugging, and better modularity.

Are there any drawbacks to reentrant code?

Yes, reentrant code can sometimes be less efficient due to the overhead of using local variables and may require more careful design.