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This page lists the spare knowledge we have on the official CTR API.

Synchronization Primitives

These are to be considered in extension to the system calls outlined in Multi-threading.

Critical Section (light-weight mutex)

Similar to a mutex, but faster and no priority inheritance. Therefore problems such as priority inversion may occur.


Creates an object


Locks out threads from accessing a critical section.


Unlocks and allows for access to a critical section.

Light Semaphore

API unknown.

Light Event

API unknown.