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                ## Channel `Swoole-1.9.0`新增了一個新的內存數據結構`Channel`,用于實現高性能的進程間通信,底層基于共享內存+`Mutex`互斥鎖實現,可實現用戶態的高性能內存隊列。 * `Channel`可用于多進程環境下,底層在讀取寫入時會自動加鎖,應用層不需要擔心數據同步問題 * 必須在父進程內創建才可以在子進程內使用 > `Channel`不受`PHP`的`memory_limit`控制 ## 使用示例: ~~~ $chan = new Swoole\Channel(1024 * 256); $n = 100000; $bytes = 0; if (pcntl_fork() > 0) { echo "Father\n"; for ($i = 0; $i < $n; $i++) { $data = str_repeat('A', rand(100, 200)); if ($chan->push($data) === false) { echo "channel full\n"; usleep(1000); $i--; continue; } $bytes += strlen($data); // echo "#$i\tpush ".strlen($data)." bytes\n"; } echo "total push bytes: $bytes\n"; var_dump($chan->stats()); } else { echo "Child\n"; for ($i = 0; $i < $n; $i++) { $data = $chan->pop(); if ($data === false) { echo "channel empty\n"; usleep(1000); $i--; continue; } $bytes += strlen($data); // echo "#$i\tpop " . strlen($data) . " bytes\n"; } echo "total pop bytes: $bytes\n"; var_dump($chan->stats()); } ~~~
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