Attention: Here be dragons

This is the latest (unstable) version of this documentation, which may document features not available in or compatible with released stable versions of Godot.

Checking the stable version of the documentation...

Mutex

Eredita: RefCounted < Object

Un Semaphore binario per la sincronizzazione di più Thread.

Descrizione

A synchronization mutex (mutual exclusion). This is used to synchronize multiple Threads, and is equivalent to a binary Semaphore. It guarantees that only one thread can access a critical section at a time.

This is a reentrant mutex, meaning that it can be locked multiple times by one thread, provided it also unlocks it as many times.

Warning: To ensure proper cleanup without crashes or deadlocks, the following conditions must be met:

When a Mutex's reference count reaches zero and it is therefore destroyed, no threads (including the one on which the destruction will happen) must have it locked.
When a Thread's reference count reaches zero and it is therefore destroyed, it must not have any mutex locked.

Tutorial

Metodi

void	lock()
bool	try_lock()
void	unlock()

Descrizioni dei metodi

void lock() 🔗

Blocca questo Mutex, blocca finché non viene sbloccato dal proprietario attuale.

Nota: Questa funzione restituisce senza bloccare se il thread ha già il possesso del mutex.

bool try_lock() 🔗

Tenta di bloccare questo Mutex, ma non blocca. Restituisce true in caso di successo, altrimenti false.

Nota: Questa funzione restituisce true se il thread ha già il possesso del mutex.

void unlock() 🔗

Unlocks this Mutex, leaving it to other threads.

Note: If a thread called lock() or try_lock() multiple times while already having ownership of the mutex, it must also call unlock() the same number of times in order to unlock it correctly.

Warning: Calling unlock() more times than lock() on a given thread, thus ending up trying to unlock a non-locked mutex, is wrong and may causes crashes or deadlocks.