<?xml version="1.0" encoding="UTF-8" ?> <class name="Mutex" inherits="Reference" version="4.0"> <brief_description> A synchronization mutex (mutual exclusion). </brief_description> <description> A synchronization mutex (mutual exclusion). This is used to synchronize multiple [Thread]s, and is equivalent to a binary [Semaphore]. It guarantees that only one thread can ever acquire the lock at a time. A mutex can be used to protect a critical section; however, be careful to avoid deadlocks. </description> <tutorials> <link title="Using multiple threads">https://docs.godotengine.org/en/latest/tutorials/threads/using_multiple_threads.html</link> </tutorials> <methods> <method name="lock"> <return type="void"> </return> <description> Locks this [Mutex], blocks until it is unlocked by the current owner. </description> </method> <method name="try_lock"> <return type="int" enum="Error"> </return> <description> Tries locking this [Mutex], but does not block. Returns [constant OK] on success, [constant ERR_BUSY] otherwise. </description> </method> <method name="unlock"> <return type="void"> </return> <description> Unlocks this [Mutex], leaving it to other threads. </description> </method> </methods> <constants> </constants> </class>