<?xml version="1.0" encoding="UTF-8" ?> <class name="Semaphore" inherits="Reference" category="Core" version="3.1"> <brief_description> A synchronization Semaphore. </brief_description> <description> A synchronization Semaphore. Element used to synchronize multiple [Thread]s. Initialized to zero on creation. Be careful to avoid deadlocks. For a binary version, see [Mutex]. </description> <tutorials> </tutorials> <demos> </demos> <methods> <method name="post"> <return type="int" enum="Error"> </return> <description> Lowers the [code]Semaphore[/code], allowing one more thread in. Returns [code]OK[/code] on success, [code]ERR_BUSY[/code] otherwise. </description> </method> <method name="wait"> <return type="int" enum="Error"> </return> <description> Tries to wait for the [code]Semaphore[/code], if its value is zero, blocks until non-zero. Returns [code]OK[/code] on success, [code]ERR_BUSY[/code] otherwise. </description> </method> </methods> <constants> </constants> </class>