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<?php |
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declare(strict_types=1); |
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namespace Yiisoft\Queue\Cli; |
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class SignalLoop implements LoopInterface |
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{ |
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use SoftLimitTrait; |
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/** |
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* @psalm-suppress UndefinedConstant |
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* @psalm-suppress MissingClassConstType |
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*/ |
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protected const SIGNALS_EXIT = [SIGHUP, SIGINT, SIGTERM]; |
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/** |
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* @psalm-suppress UndefinedConstant |
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* @psalm-suppress MissingClassConstType |
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*/ |
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protected const SIGNALS_SUSPEND = [SIGTSTP]; |
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/** |
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* @psalm-suppress UndefinedConstant |
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* @psalm-suppress MissingClassConstType |
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*/ |
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protected const SIGNALS_RESUME = [SIGCONT]; |
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protected bool $pause = false; |
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protected bool $exit = false; |
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/** |
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* @param int $memorySoftLimit Soft RAM limit in bytes. The loop won't let you continue to execute the program if |
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* soft limit is reached. Zero means no limit. |
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*/ |
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public function __construct(protected int $memorySoftLimit = 0) |
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{ |
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foreach (self::SIGNALS_EXIT as $signal) { |
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pcntl_signal($signal, fn () => $this->exit = true); |
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} |
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foreach (self::SIGNALS_SUSPEND as $signal) { |
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pcntl_signal($signal, fn () => $this->pause = true); |
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} |
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foreach (self::SIGNALS_RESUME as $signal) { |
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pcntl_signal($signal, fn () => $this->pause = false); |
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} |
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} |
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/** |
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* Checks signals state. |
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* |
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* {@inheritdoc} |
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*/ |
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1 |
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public function canContinue(): bool |
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{ |
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1 |
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if ($this->memoryLimitReached()) { |
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return false; |
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} |
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return $this->dispatchSignals(); |
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} |
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protected function dispatchSignals(): bool |
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{ |
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pcntl_signal_dispatch(); |
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// Wait for resume signal until loop is suspended |
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1 |
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while ($this->pause && !$this->exit) { |
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usleep(10000); |
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pcntl_signal_dispatch(); |
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} |
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return !$this->exit; |
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} |
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protected function getMemoryLimit(): int |
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{ |
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return $this->memorySoftLimit; |
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} |
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} |
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yiisoft /
queue
