­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ declare (strict_types=1); namespace RectorPrefix202411\Fidry\CpuCoreCounter\Finder; use function file_get_contents; use function is_file; use function sprintf; use function substr_count; use const PHP_EOL; /** * Find the number of CPU cores looking up at the cpuinfo file which is available * on Linux systems and Windows systems with a Linux sub-system. * * @see https://github.com/paratestphp/paratest/blob/c163539818fd96308ca8dc60f46088461e366ed4/src/Runners/PHPUnit/Options.php#L903-L909 * @see https://unix.stackexchange.com/questions/146051/number-of-processors-in-proc-cpuinfo */ final class CpuInfoFinder implements CpuCoreFinder { private const CPU_INFO_PATH = '/proc/cpuinfo'; public function diagnose() : string { if (!is_file(self::CPU_INFO_PATH)) { return sprintf('The file "%s" could not be found.', self::CPU_INFO_PATH); } $cpuInfo = file_get_contents(self::CPU_INFO_PATH); if (\false === $cpuInfo) { return sprintf('Could not get the content of the file "%s".', self::CPU_INFO_PATH); } return sprintf('Found the file "%s" with the content:%s%s%sWill return "%s".', self::CPU_INFO_PATH, PHP_EOL, $cpuInfo, PHP_EOL, self::countCpuCores($cpuInfo)); } /** * @return positive-int|null */ public function find() : ?int { $cpuInfo = self::getCpuInfo(); return null === $cpuInfo ? null : self::countCpuCores($cpuInfo); } public function toString() : string { return 'CpuInfoFinder'; } private static function getCpuInfo() : ?string { if (!@is_file(self::CPU_INFO_PATH)) { return null; } $cpuInfo = @file_get_contents(self::CPU_INFO_PATH); return \false === $cpuInfo ? null : $cpuInfo; } /** * @internal * * @return positive-int|null */ public static function countCpuCores(string $cpuInfo) : ?int { $processorCount = substr_count($cpuInfo, 'processor'); return $processorCount > 0 ? $processorCount : null; } }