Semaphore¶
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¶
Methods¶
post ( ) |
|
wait ( ) |
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.