GoLang Swoole\Atomic::__construct

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PHP Swoole\Atomic::__construct

PHP original manual for Swoole\Atomic::__construct [ show | php.net ]


(PHP 5 >= 5.2.0, PHP 7, PECL swoole >= 1.9.0)

Swoole\Atomic::__constructConstruct a swoole atomic object.


public Swoole\Atomic::__construct ([ integer $value ] )

Swoole atomic object is a integer variable allows any processor to atomically test and modify. It is implemented based on CPU atomic instructions. The Swoole atomic variables have to defined before swoole_server->start.

Compare-and-swap (CAS) is an atomic instruction used in multithreading to achieve synchronization. It compares the content of a memory location with a given value and, only if they are the same, modifies the content of that memory location to a new given value.



The value of the atomic object.