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<?php |
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/** |
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* Process Library |
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* @author Tao <[email protected]> |
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*/ |
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namespace Slince\Process\SystemV; |
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class SharedMemory |
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{ |
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use IpcKeyTrait; |
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/** |
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* The resource that be generated after call "shm_attach" |
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* @var resource |
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*/ |
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protected $shmId; |
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/** |
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* The size of the shared memory |
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* @var int |
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*/ |
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protected $size; |
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public function __construct($pathname = __FILE__, $size = null, $permission = 0666) |
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{ |
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if (!is_null($size)) { |
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$this->size = static::humanReadableToBytes($size); |
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} else { |
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$this->size = (int)ini_get('sysvshm.init_mem') ?: 10000; |
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} |
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$ipcKey = $this->generateIpcKey($pathname); |
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$this->shmId = shm_attach($ipcKey, $this->size, $permission); |
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} |
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/** |
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* Gets a value from the shared memory |
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* @param $key |
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* @return mixed |
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*/ |
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public function get($key) |
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{ |
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return shm_get_var($this->shmId, $this->generateShmKey($key)); |
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} |
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/** |
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* Persists data in the shared memory |
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* @param string $key |
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* @param mixed $value |
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* @return bool |
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*/ |
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public function set($key, $value) |
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{ |
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return shm_put_var($this->shmId, $this->generateShmKey($key), $value); |
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} |
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/** |
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* Delete an item from the shared memory by its key |
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* @param string $key |
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* @return bool |
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*/ |
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public function delete($key) |
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{ |
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return shm_remove_var($this->shmId, $this->generateShmKey($key)); |
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} |
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/** |
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* Checks whether an item exists in the shared memory |
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* @param string $key |
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* @return bool |
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*/ |
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public function has($key) |
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{ |
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return shm_has_var($this->shmId, $this->generateShmKey($key)); |
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} |
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/** |
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* Deletes all items |
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*/ |
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public function clear() |
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{ |
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return shm_remove($this->shmId); |
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} |
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/** |
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* Checks whether the memory is enabled |
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* @return bool |
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*/ |
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public function isEnabled() |
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{ |
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return is_resource($this->shmId); |
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} |
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/** |
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* Disconnects from shared memory |
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*/ |
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public function close() |
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{ |
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is_resource($this->shmId) && shm_detach($this->shmId); |
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} |
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/** |
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* Removes all items and disconnects from shared memory |
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* @return void |
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*/ |
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public function destroy() |
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{ |
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if (is_resource($this->shmId)) { |
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shm_remove($this->shmId); |
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shm_detach($this->shmId); |
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} |
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} |
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/** |
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* Generate the variable key |
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* @param string $val |
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* @return string int |
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*/ |
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protected function generateShmKey($val) |
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{ |
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// enable all world langs and chars ! |
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return preg_replace("/[^0-9]/","",(preg_replace("/[^0-9]/","",md5($val))/35676248)/619876); |
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} |
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/** |
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* Convert human readable file size (e.g. "10K" or "3M") into bytes |
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* @link https://github.com/brandonsavage/Upload/blob/master/src/Upload/File.php#L446 |
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* @param string $input |
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* @return int |
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*/ |
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public static function humanReadableToBytes($input) |
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{ |
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$number = (int)$input; |
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$units = array( |
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'b' => 1, |
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'k' => 1024, |
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'm' => 1048576, |
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'g' => 1073741824 |
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); |
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$unit = strtolower(substr($input, -1)); |
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if (isset($units[$unit])) { |
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$number = $number * $units[$unit]; |
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} |
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return $number; |
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} |
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} |
slince /
process
