Boost: thread lock

1. Overview of boost locks:

The boost Library provides the mutex and lock classes. By combining them, you can easily build read/write locks and mutex locks.

 

2. mutex object class (two main types ):

1. boost: mutex (exclusive mutex class) --> There are lock and unlock methods

2. boost: shared_mutex (shared mutex class) --> There are lock And unlock methods And shared_lock And shared_unlock methods.

 

3. lock template class:

1. boost: unique_lock <T> (exclusive lock): T in unique_lock <T> can be any of the mutex classes. The lock and unlock methods are automatically called.

2. boost: shared_lock <T> (shared lock): The T in shared_lock <T> can only be shared_mutex class; The shared_lock and shared_unlock methods are automatically called.

 

4. Recursive mutex:

　　

Boost: mutex: scoped_lock

Boost: mutex io_mutex;

Void foo ()

{

{

Boost: mutex: scoped_lock lock (io_mutex); // lock

} // Unlock

}

 

5. Set lock timeout:

Boost: unique_lock <boost: timed_mutex> lk (io_mutex, std: chrono: milliseconds (3); // timeout for 3 seconds