From the course: Complete Guide to Parallel and Concurrent Programming with C++

Unlock this course with a free trial

Join today to access over 24,900 courses taught by industry experts.

Latch: C++ demo

Latch: C++ demo - C++ Tutorial

From the course: Complete Guide to Parallel and Concurrent Programming with C++

Start my 1-month free trial Buy for my team

Latch: C++ demo

“

- [Instructor] In addition to barriers to control the order of execution, there's another related synchronization mechanism called a latch. This allows one or more threads to wait until a set of operations being performed in other threads to complete. The latch is initialized with a given count value, which threads can use in two ways. Threads can either wait at a latch until the count value reaches zero. Much like how threads can wait at a barrier. Or they can decrement the count value by calling the latch's countdown function. So, the key difference between a latch and a barrier is that the barrier releases when a certain number of threads waiting on it has been reached. Whereas the latch releases after the countdown function gets called enough times to reduce the count value to zero. For this demonstration, we'll modify the previous example code that used a barrier to now use a latch instead. First, we'll change the include statement on line 6 to include the latch header file from…

Contents