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Questions - race-condition

Ending a loop on time expiration

I have a long computation in a loop, which I need to end prematurely if allowed compute time expires (and return a partially computed result). I plan to do it via SIGALARM handler and a timer: // Alar...
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user2052436

c++

c++17

signals

atomic

race-condition

Votes: 0

Answers: 2

Latest Answer

If you aren't using multiple threads, you don't need an atomic operation. Just set the global variable expired = true in the signal handler. EDIT: as @Frank demonstrated below, the compiler might opti...
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user16978892

Is it safe to update counter from inside one of Promise.all promises in Node.js?

Node.js uses threads from worker pool to perform I/O operations. If I need to count the number of characters in many files concurrently (using Promise.all), is it safe to update the totalNumberOfChars...
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hitchhiker

javascript

node.js

concurrency

race-condition

Votes: 0

Answers: 1

Latest Answer

This is safe, because what's inside this function: pathsToFiles.map(async (path) => { const chars = await readFileAsync(path); totalNumberOfChars += chars.length; }) is executed synchronou...
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David Gabrielyan

Rails first_or_initialize with condition on initialize

I try to make a first_or_initialize with condition on the initialize, Here what I have : def find_or_initialize_user(name) User.where(company: company).first_or_initialize(company: company, name: ...
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TheGame

ruby-on-rails

race-condition

Votes: 0

Answers: 1

Latest Answer

I believe the following should work: User.joins(:company).where('companies.can_add_user').first_or_initialize(company: company, name: name) The first part of that should translate to roughly the foll...
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Matt

Golang - race condition using go-routine

I tried to use the race flag to my program and issue found :( The func is the following func (g *WaitingErrorGroup) Start(run func() (bool, error)) { g.g.Start(func() { requeue, err := run...
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JME

go

race-condition

Votes: 0

Answers: 2

Latest Answer

The problem appears because you trying to manipulate not synchronized shared memory (g.err in your case) from different goroutines. You have two different approaches to handle concurrent code in go: ...
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Danil Perestoronin

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