The term "reentrant" refers to a programming technique in which a subroutine can safely be called repeatedly without the risk of corrupting data. This is accomplished by saving the state of the program before calling the subroutine, and then restoring the state after the subroutine has been executed.
Reentrant code is often used in programs that must be thread-safe, as it ensures that each thread has its own private copy of the data that it is working with.
What does reentrant mean in programming?
The term "reentrant" is used to describe code that can be safely executed concurrently by multiple threads. This is in contrast to code that is not reentrant, which can only be safely executed by a single thread at a time.
Reentrant code is typically written in a way that avoids using global variables or other shared data structures. Instead, each thread has its own private data that it uses while executing the code. This ensures that the code is thread-safe, meaning that it will produce the same results regardless of the order in which the threads execute it.
Reentrant code is also often written in a way that allows it to be interrupted and resumed safely. This is important in real-time systems, where an unpredictable event (such as an external hardware interrupt) can cause a thread to be preempted unexpectedly.
Overall, reentrant code is designed to be safe and reliable in the presence of concurrent execution and interrupts. What is a reentrant in geography? A reentrant in geography is a place where two or more rivers come together.
What is the difference between reentrant and non-reentrant functions?
Reentrant functions are functions that can be interrupted by other functions without corrupting the state of the first function. Non-reentrant functions are functions that cannot be interrupted by other functions without corrupting the state of the first function.
What is reentrant function example?
A reentrant function is a function that can safely be called from within a signal handler. A function is reentrant if it does not modify any global or static data that could be modified by another thread of execution, and if it does not call any other non-reentrant functions.
One example of a reentrant function is the strtok() function in the C standard library, which is used for tokenizing strings. This function is safe to call from within a signal handler because it modifies only local data structures and does not call any other non-reentrant functions. What is a reentrant call? A reentrant call is a function call that does not interfere with the execution of other functions in the program. This means that the function can be called multiple times without affecting the execution of other functions.