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<?php |
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namespace PHPDaemon\Utils; |
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use PHPDaemon\Core\Daemon; |
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/** |
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* ShmEntity |
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* @package PHPDaemon\Utils |
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* @author Vasily Zorin <[email protected]> |
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*/ |
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class ShmEntity { |
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use \PHPDaemon\Traits\ClassWatchdog; |
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use \PHPDaemon\Traits\StaticObjectWatchdog; |
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/** |
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* @var string Path |
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*/ |
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protected $path; |
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/** |
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* @var array Segments |
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*/ |
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protected $segments = []; |
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/** |
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* @var integer Segment size |
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*/ |
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protected $segsize = 1024; |
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/** |
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* @var string Name |
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*/ |
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protected $name; |
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/** |
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* @var integer Key |
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*/ |
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protected $key; |
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/** |
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* Constructor |
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* @param string $path Path |
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* @param integer $segsize Segment size |
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* @param string $name Name |
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* @param boolean $create Create |
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*/ |
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public function __construct($path, $segsize, $name, $create = false) { |
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$this->path = $path; |
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$this->segsize = $segsize; |
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$this->name = $name; |
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if ($create && !touch($this->path)) { |
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Daemon::log('Couldn\'t touch IPC file \'' . $this->path . '\'.'); |
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exit(0); |
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} |
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if (!is_file($this->path) || ($this->key = ftok($this->path, 't')) === false) { |
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Daemon::log('Couldn\'t ftok() IPC file \'' . $this->path . '\'.'); |
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exit(0); |
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} |
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if (!$this->open(0, $create) && $create) { |
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Daemon::log('Couldn\'t open IPC-' . $this->name . ' shared memory segment (key=' . $this->key . ', segsize=' . $this->segsize . ', uid=' . posix_getuid() . ', path = ' . $this->path . ').'); |
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exit(0); |
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} |
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} |
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/** |
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* Opens segment of shared memory |
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* @param integer $segno Segment number |
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* @param boolean $create Create |
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* @return integer Segment number |
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*/ |
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public function open($segno = 0, $create = false) { |
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if (isset($this->segments[$segno])) { |
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return $this->segments[$segno]; |
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} |
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$key = $this->key + $segno; |
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if (!$create) { |
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$shm = @shmop_open($key, 'w', 0, 0); |
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} |
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else { |
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$shm = @shmop_open($key, 'w', 0, 0); |
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if ($shm) { |
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shmop_delete($shm); |
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shmop_close($shm); |
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} |
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$shm = shmop_open($key, 'c', 0755, $this->segsize); |
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} |
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if (!$shm) { |
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return false; |
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} |
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$this->segments[$segno] = $shm; |
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return $shm; |
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} |
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/** |
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* Get open segments |
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* @return array |
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*/ |
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public function getSegments() { |
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return $this->segments; |
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} |
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/** |
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* Open all segments |
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* @return void |
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*/ |
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public function openall() { |
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do { |
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$r = $this->open(sizeof($this->segments)); |
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} while ($r); |
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} |
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/** |
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* Write to shared memory |
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* @param string $data Data |
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* @param integer $offset Offset |
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* @return boolean Success |
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*/ |
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public function write($data, $offset) { |
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$segno = floor($offset / $this->segsize); |
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if (!isset($this->segments[$segno])) { |
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if (!$this->open($segno, true)) { |
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return false; |
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} |
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} |
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$sOffset = $offset % $this->segsize; |
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$d = $this->segsize - ($sOffset +mb_orig_strlen$data)); |
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if ($d < 0) { |
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$this->write(mb_orig_substr($data, $d), ($segno+1) * $this->segsize); |
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$data = mb_orig_substr($data, 0, $d); |
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} |
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//Daemon::log('writing to #'.$offset.' (segno '.$segno.')'); |
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shmop_write($this->segments[$segno], $data, $sOffset); |
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return true; |
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} |
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/** |
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* Read from shared memory |
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141
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* @param integer $offset Offset |
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* @param integer $length Length |
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* @return string Data |
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*/ |
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public function read($offset, $length = 1) { |
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$ret = ''; |
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$segno = floor($offset / $this->segsize); |
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$sOffset = $offset % $this->segsize; |
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for (;;++$segno) { |
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if (!isset($this->segments[$segno])) { |
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if (!$this->open($segno)) { |
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goto ret; |
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} |
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} |
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$read = shmop_read($this->segments[$segno], $sOffset, min($length -mb_orig_strlen$ret), $this->segsize)); |
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//Daemon::log('read '.strlen($read).' from segno #'.$segno); |
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$ret .= $read; |
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if (strlen($ret) >= $length) { |
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goto ret; |
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} |
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$sOffset = 0; |
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} |
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ret: |
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if ($ret === '') { |
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return false; |
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} |
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return $ret; |
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} |
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/** |
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* Deletes all segments |
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* @return void |
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*/ |
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public function delete() { |
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foreach ($this->segments as $shm) { |
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shmop_delete($shm); |
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} |
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} |
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} |
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kakserpom /
phpdaemon
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