Mutex

Inherits: Reference < Object

A synchronization mutex (mutual exclusion).

Description

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 ever acquire the lock at a time. A mutex can be used to protect a critical section; however, be careful to avoid deadlocks.

Methods

void

lock ( )

Error

try_lock ( )

void

unlock ( )

Method Descriptions

  • void lock ( )

Locks this Mutex, blocks until it is unlocked by the current owner.

Note: This function returns without blocking if the thread already has ownership of the mutex.


Tries locking this Mutex, but does not block. Returns @GlobalScope.OK on success, @GlobalScope.ERR_BUSY otherwise.

Note: This function returns @GlobalScope.OK if the thread already has ownership of the 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.