27 Questions
What is the purpose of the 'IntegrCalc' class mentioned in the code snippet?
To calculate the integral of a function using multiple threads
What does the 'func' function in the code snippet calculate?
Absolute value of the sine function
Which of the following is NOT a member variable of the 'IntegrCalc' class?
divisions
What is the purpose of 'slotsAvail' and 'resAvail' semaphores in the 'IntegrCalc' class?
Controlling access to shared buffer slots
In the 'Slice' struct, what does the 'divisions' member represent?
The number of divisions in an integration interval
Which mutex in the 'IntegrCalc' class is responsible for ensuring exclusive access to the 'buffer'?
l2
'numProducts' semaphore in the 'IntegrCalc' class is used for what purpose?
Ensuring only a fixed number of threads can access shared resources
'result' pointer in the 'IntegrCalc' class is most likely used for what purpose?
Referencing the final results of function integration
'initClass' method in the 'IntegrCalc' class is primarily responsible for what action?
Initializing thread-specific variables and data structures
What is the main purpose of using semaphores in the producers–consumers problem?
Ensuring exclusive access to the shared buffer
Why should binary semaphores be avoided in the context of multiple producers and consumers?
They cannot accumulate multiple signals/increments
In the context of thread synchronization, what is a common issue associated with not properly using mutexes?
Race conditions in critical sections
How do counting semaphores contribute to solving the producers–consumers problem?
Allowing a specified number of threads to access the buffer
What characteristic of binary semaphores makes them less suitable for scenarios with multiple signals/increments?
Inability to accumulate signals
Why is it important to utilize semaphores in a synchronized system like the producers-consumers setup?
To manage access to shared resources
In the given code snippet, what does the 'slotsAvail' semaphore represent?
Number of empty buffer slots available
Which action does the 'resAvail' semaphore trigger in the 'Producer' class?
Indicate availability of resources
What is the purpose of the 'l1' and 'l2' semaphores in the code snippet?
Ensure mutual exclusion for buffer operations
Which operation is performed by the 'resAvail.acquire()' call in the 'Consumer' class?
Acquire an empty buffer slot
Considering the code snippet, what is the purpose of the 'in' and 'out' indices in the buffer?
Update buffer indices safely
'resCount' is mentioned but not protected by a mutex. What is a potential issue with this approach?
'resCount' may become corrupted by concurrent access
What is a common issue that can arise when using a semaphore for read-only access?
Resource leakage
Which type of semaphore is most suitable when a semaphore is used as a lock?
Binary
What limitation should be considered when using C++20's counting_semaphore over a general semaphore?
Cannot adjust value by more than 1
What is the primary role of a semaphore when used as a resource counter?
Counting available resources
In the context of semaphores, what problem can occur if read-only access is not properly managed?
Resource leakage
When implementing a semaphore as a lock, what would be a significant concern to address?
Priority inversion
Explore a C++ code snippet involving multithreading and partial sums calculation. Analyze the key changes made to the code to improve clarity and reduce errors, including the introduction of the PartialSumFunctor structure. Understand how threads are joined and partial sums are calculated.
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