<?xml version="1.0" encoding="UTF-8" ?> <class name="Semaphore" inherits="Reference" version="4.0"> <brief_description> A synchronization semaphore. </brief_description> <description> A synchronization semaphore which can be used to synchronize multiple [Thread]s. Initialized to zero on creation. Be careful to avoid deadlocks. For a binary version, see [Mutex]. </description> <tutorials> <link title="Using multiple threads">https://docs.godotengine.org/en/latest/tutorials/threads/using_multiple_threads.html</link> </tutorials> <methods> <method name="post"> <return type="void"> </return> <description> Lowers the [Semaphore], allowing one more thread in. </description> </method> <method name="try_wait"> <return type="int" enum="Error"> </return> <description> Like [method wait], but won't block, so if the value is zero, fails immediately and returns [constant ERR_BUSY]. If non-zero, it returns [constant OK] to report success. </description> </method> <method name="wait"> <return type="void"> </return> <description> Waits for the [Semaphore], if its value is zero, blocks until non-zero. </description> </method> </methods> <constants> </constants> </class>