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- Active Object
- Decouples method execution from method invocation that reside in their own thread of control. The goal is to introduce concurrency, by using asynchronous method invocation and a scheduler for handling requests.
- Only execute an action on an object when the object is in a particular state.
- Binding properties
- Combining multiple observers to force properties in different objects to be synchronized or coordinated in some way.
- Block chain
- Decentralized way to store data and agree on ways of processing it in a Merkle tree, optionally using Digital signature for any individual contributions.
- Double-checked locking
- Reduce the overhead of acquiring a lock by first testing the locking criterion (the 'lock hint') in an unsafe manner; only if that succeeds does the actual locking logic proceed.
- Can be unsafe when implemented in some language/hardware combinations. It can therefore sometimes be considered an anti-pattern.
- Event-based asynchronous
- Addresses problems with the asynchronous pattern that occur in multithreaded programs.
- Guarded suspension
- Manages operations that require both a lock to be acquired and a precondition to be satisfied before the operation can be executed.
- Join-pattern provides a way to write concurrent, parallel and distributed programs by message passing. Compared to the use of threads and locks, this is a high-level programming model.
- One thread puts a "lock" on a resource, preventing other threads from accessing or modifying it.
- Messaging design pattern (MDP)
- Allows the interchange of information (i.e. messages) between components and applications.
- Monitor object
- An object whose methods are subject to mutual exclusion, thus preventing multiple objects from erroneously trying to use it at the same time.
- A reactor object provides an asynchronous interface to resources that must be handled synchronously.
- Read-write lock
- Allows concurrent read access to an object, but requires exclusive access for write operations.
- Explicitly control when threads may execute single-threaded code.
- Thread pool
- A number of threads are created to perform a number of tasks, which are usually organized in a queue. Typically, there are many more tasks than threads. Can be considered a special case of the object pool pattern.
- Thread-specific storage
- Static or "global" memory local to a thread.