what is reentrancy of a subroutine? - EAS

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  1. In computing, a computer program or subroutine is called reentrant if multiple invocations can safely run concurrently on multiple processors, or on a single processor system, where a reentrant procedure can be interrupted in the middle of its execution and then safely be called again ("re-entered") before its previous invocations complete execution.

    Reentrancy (computing) - Wikipedia

    en.wikipedia.org/wiki/Reentrancy_(computing)
    en.wikipedia.org/wiki/Reentrancy_(computing)
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  2. 大家還會問
    What is reentrancy?Reentrancy is not the same thing as idempotence, in which the function may be called more than once yet generate exactly the same output as if it had only been called once. Generally speaking, a function produces output data based on some input data (though both are optional, in general). Shared data could be accessed by any function at any time.

    Reentrancy (computing) - Wikipedia

    en.wikipedia.org/wiki/Reentrancy_(computing)
    Can a reentrant subroutine be thread-safe?A reentrant subroutine can achieve thread-safety, but being reentrant alone might not be sufficient to be thread-safe in all situations. Conversely, thread-safe code does not necessarily have to be reentrant (see below for examples).

    Reentrancy (computing) - Wikipedia

    en.wikipedia.org/wiki/Reentrancy_(computing)
    What is a reentrant routine?In the embedded world a routine must satisfy the following conditions to be reentrant: It uses all shared variables in an atomic way, unless each is allocated to a specific instance of the function. It does not call non-reentrant functions. It does not use the hardware in a non-atomic way. Quite a mouthful!

    Introduction to Reentrancy - Embedded.com

    www.embedded.com/introduction-to-reentrancy/
    What are the conditions for a function to be called reentrant?The function has to satisfy certain conditions to be called as reentrant: 1. It may not use global and static data. Though there are no restrictions, but it is generally not advised. because the interrupt may change certain global values and resuming the course of action of the reentrant function with the new data may give undesired results.

    Reentrant Function - GeeksforGeeks

    www.geeksforgeeks.org/reentrant-function/
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  3. Reentrancy (computing) - Wikipedia

    https://en.wikipedia.org/wiki/Reentrancy_(computing)

    網頁Reentrancy is distinct from, but closely related to, thread-safety. A function can be thread-safe and still not reentrant. For example, a function could be wrapped all around with a mutex (which avoids problems in multithreading environments), but, if that function were …

  4. What is Reentrancy? - Reentrancy Smart Contract …

    https://moralis.io/what-is-reentrancy-reentrancy-smart-contract-example

    網頁By its definition, the word “reentrancy” means “the act of entering again (reentering)”. However, the word is almost exclusively used in computing. In that sense, software or …

  5. 15.2: Re-entrant Subroutines - McGill University

    https://www.cs.mcgill.ca/~cs573/fall2002/notes/lec273/lecture15/15_2.htm

    網頁Subroutines that only make use of the stack and the internal registers of the CPU will in effect be re-entrant This is because the mechanism used to implement multitasking for …

  6. reentrant subroutine | SpringerLink

    https://link.springer.com/referenceworkentry/10.1007/1-4020-0613-6_15788

    網頁A computer subroutine that (a) can be entered before a prior execution of the same subroutine is completed and (b) can execute correctly. Synonym reenterable subroutine . …

  7. Introduction to Reentrancy - Embedded.com

    https://www.embedded.com/introduction-to-reentrancy

    網頁Introduction to Reentrancy. March 15, 2001 Jack Ganssle. Advertisement. Virtually every embedded system uses interrupts; many support multitasking or multithreaded …

  8. Reentrancy in JavaScript - Stack Overflow

    https://stackoverflow.com/questions/34129978

    網頁In computing, a computer program or subroutine is called reentrant if it can be interrupted in the middle of its execution and then safely called again ("re-entered") before its previous …

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  9. b What is Reentrancy Ans A computer program or subroutine is …

    https://www.coursehero.com/file/p1q7pe5/b-What-is-Reentrancy-Ans-A-computer-program-or...

    網頁b What is Reentrancy Ans A computer program or subroutine is called reentrant if from CS MISC at Al-Balqa' Applied University This preview shows page 11 - 13 out of 31 …

  10. Reentrant Function - GeeksforGeeks

    https://www.geeksforgeeks.org/reentrant-function

    網頁Reentrancy is distinct from, but closely related to, thread-safety. A function can be thread-safe and still not reentrant. For example, a function could be wrapped all around with a …

  11. What are Subroutines? - tutorialspoint.com

    https://www.tutorialspoint.com/what-are-subroutines

    網頁Subroutines are programs that are used by other routines to accomplish a particular task. A subroutine can be called from any point within the main body of the micro-program. …

  12. Function (computer programming) - Wikipedia

    https://en.wikipedia.org/wiki/Function_(computer_programming)

    網頁In computer programming, a function or subroutine (when it doesn't return a value) is a sequence of program instructions that performs a specific task, packaged as a unit. This …



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