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Questions - data-race

Could reading & writing int which is declared with volatile and stored on a aligned address be garanteed to be atomic?

Here the related code snippet: #include <functional> #include <thread> #include <iostream> #include <chrono> #include <atomic> #ifdef NO_STUCK_WITH_OPTIMIZATION using T...
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John

c++

data-race

Votes: 0

Answers: 0

Why the code snippet gets stuck when optimization is enabled?

There are three question about the code snippet below. When the macro(i.e. NO_STUCK_WITH_OPTIMIZATION ) is not enabled, why this code snippet gets stuck when the optimization is enabled(i.e. -O1, -O2...
test-img

John

c++

c++11

data-race

Votes: 0

Answers: 1

Latest Answer

You have a multi-threaded program. One thread does is_run = 0;. The other thread does while(1==is_run). Although you guarantee, with a sleep (matter for another question), that the write is done befor...
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Jeffrey

Data race about map::operator[]

Is there any potential problem in this code snippet? #include <mutex> #include <map> #include <vector> #include <thread> constexpr int FOO_NUM = 5; int main() { std::map<i...
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John

c++

c++11

stl

mutex

data-race

Votes: 0

Answers: 2

Latest Answer

operator[] of associative and unordered containers is not specified to be safe from data races if called without synchronization in multiple threads. See [container.requirements.dataraces]/1. Therefor...
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user17732522

Mutex vs RWMutex and data races?

I'm pretty new in Go and need the answers to some of dilemmas while implementing small HTTP notifier than runs concurrently, sending message to the configured HTTP endpoint. For that purpose, I use t...
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aldm

go

concurrency

mutex

locks

data-race

Votes: 0

Answers: 0

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