Semaphore

Inherits: Reference < Object A synchronization semaphore.

Description

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 ( ) Semaphore, allowing one more thread in. Note: This method internals’ can’t possibly fail, but an error code is returned for backwards compatibility, which will always be @GlobalScope.OK.

• Error try_wait ( ) wait, but won’t block, so if the value is zero, fails immediately and returns @GlobalScope.ERR_BUSY. If non-zero, it returns @GlobalScope.OK to report success.

• Error wait ( ) Semaphore, if its value is zero, blocks until non-zero. Note: This method internals’ can’t possibly fail, but an error code is returned for backwards compatibility, which will always be @GlobalScope.OK.