Viewing file:  CpuInfoFinder.php (2.38 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
<?php
/*
* This file is part of the Fidry CPUCounter Config package.
*
* (c) Théo FIDRY <theo.fidry@gmail.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
declare(strict_types=1);
namespace 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',
self::CPU_INFO_PATH,
PHP_EOL,
$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;
}
}
|