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iOS 16 is the sixteenth major release of Apple's iOS mobile operating system for the iPhone. It is the successor of iOS 15 , and was announced at the company's Worldwide Developers Conference (WWDC) on June 6, 2022, alongside iPadOS 16 , [ 3 ] and released on September 12, 2022.
Metal has been available since June 2, 2014 on iOS devices powered by Apple A7 or later, [10] and since June 8, 2015 on Macs (2012 models or later) running OS X El Capitan. [11] On June 5, 2017, at WWDC, Apple announced the second version of Metal, to be supported by macOS High Sierra, iOS 11 and tvOS 11. Metal 2 is not a separate API from ...
iOS 16 / iPadOS 16 – Sydney; iOS 17 / iPadOS 17 – Dawn; iOS 18 / iPadOS 18 – Crystal; Mac OS X / OS X / macOS. The internal codenames of Mac OS X 10.0 through ...
To enter a critical section, a thread must obtain a semaphore, which it releases on leaving the section. Other threads are prevented from entering the critical section at the same time as the original thread, but are free to gain control of the CPU and execute other code, including other critical sections that are protected by different semaphores.
In computer science, a semaphore is a variable or abstract data type used to control access to a common resource by multiple threads and avoid critical section problems in a concurrent system such as a multitasking operating system. Semaphores are a type of synchronization primitive. A trivial semaphore is a plain variable that is changed (for ...
In computing, a futex (short for "fast userspace mutex") is a kernel system call that programmers can use to implement basic locking, or as a building block for higher-level locking abstractions such as semaphores and POSIX mutexes or condition variables. A futex consists of a kernel-space wait queue that is attached to an atomic integer in ...
In computer science, an event (also called event semaphore) is a type of synchronization mechanism that is used to indicate to waiting processes when a particular condition has become true. An event is an abstract data type with a boolean state and the following operations:
Semaphore (lit. ' apparatus for signalling '; from Ancient Greek σῆμα (sêma) 'mark, sign, token' and Greek -φόρος (-phóros) 'bearer, carrier') [1] is the use of an apparatus to create a visual signal transmitted over distance. [2] [3] A semaphore can be performed with devices including: fire, lights, flags, sunlight, and moving arms.