cpputil | Miscellaneous utility code for c projects
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kandi X-RAY | cpputil Summary
Miscellaneous utility code for c++ projects.
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QUESTION
I'm writing a simple program that consists of three threads. Each thread is passed in an object Foo
and no matter which thread calls which function, the output for the program will always be "firstsecondthird"
. I use semaphore and I'm writing the test code for my implementation. Sometimes, my test case passed but sometimes the test case failed:
ANSWER
Answered 2019-Oct-17 at 18:13I take a further look at code and realize that there is a subtle bug in my test code: I pass Foo
object (e.g., foo
) by copy when create each new thread. However, I really want to have multiple threads sharing the same Foo
object across multiple threads. Thus, I add std::ref
to the foo
:
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