WaitHandleWaitAll

WaitHandleWaitAll is a static method in the .NET Framework that blocks the calling thread until all signaled synchronization primitives in a specified array are signaled. It is part of the System.Threading namespace. This method is useful for scenarios where a thread needs to wait for the completion of multiple asynchronous operations before proceeding.

The method takes an array of WaitHandle objects as input. These WaitHandle objects can represent various synchronization primitives such as Mutex, Semaphore, AutoResetEvent, and ManualResetEvent. When WaitHandleWaitAll is called, the thread enters a waiting state. It remains in this state until every WaitHandle in the provided array has been signaled. A signaled WaitHandle indicates that the resource or event it represents is available or has occurred.

Once all WaitHandles in the array are signaled, the WaitHandleWaitAll method returns, and the calling thread resumes execution. This allows for efficient coordination of multiple concurrent tasks. If one of the WaitHandles is signaled before the others, the thread continues to wait until all remaining handles are also signaled. The method has an optional overload that accepts a timeout value, allowing the thread to stop waiting after a specified duration even if not all handles have been signaled. In such cases, the method returns false, indicating that the timeout occurred. If all handles are signaled before the timeout, it returns true. This method is a fundamental tool for managing concurrency and synchronization in multithreaded applications.