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<?php |
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class Snidel_SharedMemory |
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{ |
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/** @int **/ |
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private $pid; |
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/** @int **/ |
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private $key; |
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/** @int **/ |
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private $segmentId; |
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/** |
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* @param int $pid |
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*/ |
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public function __construct($pid) |
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{ |
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$this->pid = $pid; |
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$this->key = $this->generateKey($pid); |
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} |
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/** |
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* create or open shared memory block |
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* |
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* @param int $length |
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* @throws RuntimeException |
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*/ |
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public function open($length = 0) |
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{ |
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$flags = ($length === 0) ? 'a' : 'n'; |
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$mode = ($length === 0) ? 0 : 0666; |
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$this->segmentId = shmop_open($this->key, $flags, $mode, $length); |
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if ($this->segmentId === false) { |
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throw new RuntimeException('could not open shared memory'); |
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} |
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} |
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/** |
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* write data into shared memory block |
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* |
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* @param string $data |
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* @throws RuntimeException |
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*/ |
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public function write($data) |
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{ |
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$writtenSize = shmop_write($this->segmentId, $data, 0); |
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if ($writtenSize === false) { |
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$this->delete(); |
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$this->close(); |
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throw new RuntimeException('could not write the data to shared memory'); |
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} |
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} |
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/** |
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* read data from shared memory block |
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* |
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* @return string |
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* @throws RuntimeException |
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*/ |
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public function read() |
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{ |
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$data = shmop_read($this->segmentId, 0, shmop_size($this->segmentId)); |
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if ($data === false) { |
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throw new RuntimeException('could not read the data to shared memory'); |
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} |
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return $data; |
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} |
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/** |
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* delete shared memory block |
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* |
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* @throws RuntimeException |
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*/ |
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public function delete() |
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{ |
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if (!shmop_delete($this->segmentId)) { |
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throw new RuntimeException('could not delete the data to shared memory'); |
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} |
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} |
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/** |
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* cloase shared memory block |
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* |
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* @param bool $removeTmpFile |
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*/ |
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public function close($removeTmpFile = false) |
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{ |
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shmop_close($this->segmentId); |
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if ($removeTmpFile) { |
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unlink('/tmp/' . sha1($this->pid)); |
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} |
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} |
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/** |
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* generate IPC key |
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* |
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* @return int |
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*/ |
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View Code Duplication |
private function generateKey($pid) |
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{ |
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$pathname = '/tmp/' . sha1($pid); |
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if (!file_exists($pathname)) { |
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touch($pathname); |
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} |
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return ftok($pathname, 'S'); |
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} |
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} |
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|
ackintosh /
snidel
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You can fix this by adding a namespace to your class:
When choosing a vendor namespace, try to pick something that is not too generic to avoid conflicts with other libraries.