/**
* get value from the queue of channel
*
* @param bool $block if block when the queue is empty
* @return bool|string
*/
public function get($block = false)
{
if ($this->block != $block) {
$this->pipe->setBlock($block);
$this->block = $block;
}
$len = $this->pipe->read(4);
if ($len === false) {
throw new \RuntimeException("read pipe failed");
}
if (strlen($len) === 0) {
return null;
}
$len = unpack('N', $len);
if (empty($len) || !array_key_exists(1, $len) || empty($len[1])) {
throw new \RuntimeException("data protocol error");
}
$len = intval($len[1]);
$value = '';
while (true) {
$temp = $this->pipe->read($len);
if (strlen($temp) == $len) {
return $temp;
}
$value .= $temp;
$len -= strlen($temp);
if ($len == 0) {
return $value;
}
}
}
