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<?php
/**
*
* This file is part of the phpBB Forum Software package.
*
* @copyright (c) phpBB Limited <https://www.phpbb.com>
* @license GNU General Public License, version 2 (GPL-2.0)
*
* For full copyright and license information, please see
* the docs/CREDITS.txt file.
*
*/
class phpbb_lock_flock_test extends phpbb_test_case
{
public function test_lock()
{
$path = __DIR__ . '/../tmp/precious';
$lock = new \phpbb\lock\flock($path);
$ok = $lock->acquire();
$this->assertTrue($ok);
$lock->release();
}
public function test_consecutive_locking()
{
$path = __DIR__ . '/../tmp/precious';
$lock = new \phpbb\lock\flock($path);
$ok = $lock->acquire();
$this->assertTrue($ok);
$this->assertTrue($lock->owns_lock());
$lock->release();
$this->assertFalse($lock->owns_lock());
$ok = $lock->acquire();
$this->assertTrue($ok);
$this->assertTrue($lock->owns_lock());
$lock->release();
$this->assertFalse($lock->owns_lock());
$ok = $lock->acquire();
$this->assertTrue($ok);
$this->assertTrue($lock->owns_lock());
$lock->release();
$this->assertFalse($lock->owns_lock());
}
/* This hangs the process.
public function test_concurrent_locking_fail()
{
$path = __DIR__ . '/../tmp/precious';
$lock1 = new \phpbb\lock\flock($path);
$ok = $lock1->acquire();
$this->assertTrue($ok);
$lock2 = new \phpbb\lock\flock($path);
$ok = $lock2->acquire();
$this->assertFalse($ok);
$lock->release();
$ok = $lock2->acquire();
$this->assertTrue($ok);
}
*/
public function test_concurrent_locking()
{
if (!function_exists('pcntl_fork'))
{
$this->markTestSkipped('pcntl extension and pcntl_fork are required for this test');
}
$path = __DIR__ . '/../tmp/precious';
$pid = pcntl_fork();
if ($pid)
{
// parent
// wait 0.5 s, acquire the lock, note how long it took
sleep(1);
$lock = new \phpbb\lock\flock($path);
$start = microtime(true);
$ok = $lock->acquire();
$delta = microtime(true) - $start;
$this->assertTrue($ok);
$this->assertTrue($lock->owns_lock());
$this->assertGreaterThan(0.5, $delta, 'First lock acquired too soon');
$lock->release();
$this->assertFalse($lock->owns_lock());
// acquire again, this should be instantaneous
$start = microtime(true);
$ok = $lock->acquire();
$delta = microtime(true) - $start;
$this->assertTrue($ok);
$this->assertTrue($lock->owns_lock());
$this->assertLessThan(0.1, $delta, 'Second lock not acquired instantaneously');
// reap the child
$status = null;
pcntl_waitpid($pid, $status);
}
else
{
// child
// immediately acquire the lock and sleep for 2 s
$lock = new \phpbb\lock\flock($path);
$ok = $lock->acquire();
$this->assertTrue($ok);
$this->assertTrue($lock->owns_lock());
sleep(2);
$lock->release();
$this->assertFalse($lock->owns_lock());
// and go away silently
pcntl_exec('/usr/bin/env', array('true'));
}
}
}
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