Is STL queue Thread Safe?

[Sriram Rajagopalan]

Hi,

Are STL queues thread safe in the scenario below:

I have 2 threads, one pushing to the rear end of the STL queue.. then
posting a semaphore- The other thread waits for the semaphore and would
access the front of the queue. The semaphore is initialized to 0.

Is there a possiblity of race condition in the above scenario?

Thanks,
Sriram.

 

[John Harrison]

Hi,

Are STL queues thread safe in the scenario below:

I have 2 threads, one pushing to the rear end of the STL queue.. then
posting a semaphore- The other thread waits for the semaphore and would
access the front of the queue. The semaphore is initialized to 0.

Is there a possiblity of race condition in the above scenario?

Thanks,
Sriram.

C++ standard makes no mentions of threads at all. So whether your STL is
thread safe depends entirely on the implementation. Consult your
documentation.

john

 

[Stephan Br?nnimann]

Hi,

Are STL queues thread safe in the scenario below:

I have 2 threads, one pushing to the rear end of the STL queue.. then
posting a semaphore- The other thread waits for the semaphore and would
access the front of the queue. The semaphore is initialized to 0.

Please be more specific:
What are you using as semaphore?

Is there a possiblity of race condition in the above scenario?

Thanks,
Sriram.

C++ does not deal with threads, currently there are many on-going
discussions in c.l.c++.m.
By this nothing of the STL is thread-safe.

If you properly control the access to the queue with a semaphore
then yes, it is thread safe.

regards,
Stephan Brönnimann
(e-mail address removed)
Open source rating and billing engine for communication networks.