Semaphore

Inherits: Reference < Object

A synchronization semaphore.

Description

A synchronization semaphore which can be used to synchronize multiple Threads. Initialized to zero on creation. Be careful to avoid deadlocks. For a binary version, see Mutex.

Tutorials

• Using multiple threads

Methods

Method Descriptions

• Error post ( )

Lowers the Semaphore, allowing one more thread in. Returns @GlobalScope.OK on success, @GlobalScope.ERR_BUSY otherwise.

• Error wait ( )

Tries to wait for the Semaphore, if its value is zero, blocks until non-zero. Returns @GlobalScope.OK on success, @GlobalScope.ERR_BUSY otherwise.