How is the recursive mutex used in synchronization?
The recursive_mutex class is a synchronization primitive that can be used to protect shared data from being simultaneously accessed by multiple threads. recursive_mutex offers exclusive, recursive ownership semantics: A calling thread owns a recursive_mutex for a period of time that starts when it successfully calls either lock or try_lock.
Which is the best mutex for C + +?
Unlike some other popular languages, C++ tries to provide bare-bones implementations (such as std::mutex) that do their fundamental job as fast as possible. If you need to use the more featured object (like std::recursive_mutex) at a small cost of overhead, it is also available.
What are the bits of a simple mutex?
In general, a simple mutex is a 32 bits key with bits 0-30 containing owner’s thread id and bit 31 a flag saying if the mutex has waiters or not. It has a lock method which is a CAS atomic race to claim the mutex with a syscall in case of failure. The details are not important here.
How does the mutex function work in Java?
If the current thread has not already registered itself to the threads that might access this mutex, this function creates a mutex for that thread. If some other thread has locked this mutex for write access, this function will block until the writing thread releases the object.
How to create a mutex for a changing map?
Simply create a handle to the changing map mutex. The object should not be copyable. This private member function is called when you call LockRead () or LockWrite () to lock the object. If the current thread has not already registered itself to the threads that might access this mutex, this function creates a mutex for that thread.
Can a mutex be used for reading or writing?
My aim was to create something that could act as a read/write locking mechanism. Any thread can lock it for reading, but only one thread can lock it for writing. Until the writing thread releases it, all other threads wait. A writing thread does not acquire the mutex until any other thread has released. I could use Slim Reader/Writer locks, but:
https://www.youtube.com/watch?v=yCYU2k77E4A