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68 lines
2.0 KiB
PHP
68 lines
2.0 KiB
PHP
<?php
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/** @noinspection PhpUndefinedMethodInspection */
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/** @phan-file-suppress PhanUndeclaredClassCatch */
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/** @phan-file-suppress PhanUndeclaredClassMethod */
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/** @phan-file-suppress PhanUndeclaredMethod */
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declare(strict_types=1);
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namespace OpenTelemetry\Context;
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use function extension_loaded;
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use FFI;
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use const FILTER_VALIDATE_BOOLEAN;
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use function filter_var;
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use function is_string;
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use const PHP_VERSION_ID;
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use const PHP_ZTS;
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use function sprintf;
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use function trigger_error;
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/**
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* @internal
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*/
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final class ZendObserverFiber
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{
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public static function isEnabled(): bool
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{
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$enabled = $_SERVER['OTEL_PHP_FIBERS_ENABLED'] ?? false;
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return is_string($enabled)
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? filter_var($enabled, FILTER_VALIDATE_BOOLEAN)
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: (bool) $enabled;
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}
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public static function init(): bool
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{
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static $fibers;
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if ($fibers) {
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return true;
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}
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if (PHP_ZTS || PHP_VERSION_ID < 80100 || !extension_loaded('ffi')) {
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trigger_error('Context: Fiber context switching not supported, requires PHP >= 8.1, an NTS build, and the FFI extension');
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return false;
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}
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try {
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$fibers = FFI::scope('OTEL_ZEND_OBSERVER_FIBER');
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} catch (FFI\Exception $e) {
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try {
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$fibers = FFI::load(__DIR__ . '/fiber/zend_observer_fiber.h');
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} catch (FFI\Exception $e) {
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trigger_error(sprintf('Context: Fiber context switching not supported, %s', $e->getMessage()));
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return false;
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}
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}
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$fibers->zend_observer_fiber_init_register(static fn (int $initializing) => Context::storage()->fork($initializing)); //@phpstan-ignore-line
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$fibers->zend_observer_fiber_switch_register(static fn (int $from, int $to) => Context::storage()->switch($to)); //@phpstan-ignore-line
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$fibers->zend_observer_fiber_destroy_register(static fn (int $destroying) => Context::storage()->destroy($destroying)); //@phpstan-ignore-line
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return true;
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}
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}
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