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<?php
namespace Safe;
use Safe\Exceptions\ShmopException;
/**
* shmop_delete is used to delete a shared memory block.
*
* @param resource $shmid The shared memory block resource created by
* shmop_open
* @throws ShmopException
*
*/
function shmop_delete($shmid): void
{
error_clear_last();
$result = \shmop_delete($shmid);
if ($result === false) {
throw ShmopException::createFromPhpError();
}
}
/**
* shmop_read will read a string from shared memory block.
*
* @param resource $shmid The shared memory block identifier created by
* shmop_open
* @param int $start Offset from which to start reading
* @param int $count The number of bytes to read.
* 0 reads shmop_size($shmid) - $start bytes.
* @return string Returns the data.
* @throws ShmopException
*
*/
function shmop_read($shmid, int $start, int $count): string
{
error_clear_last();
$result = \shmop_read($shmid, $start, $count);
if ($result === false) {
throw ShmopException::createFromPhpError();
}
return $result;
}
/**
* shmop_write will write a string into shared memory block.
*
* @param resource $shmid The shared memory block identifier created by
* shmop_open
* @param string $data A string to write into shared memory block
* @param int $offset Specifies where to start writing data inside the shared memory
* segment.
* @return int The size of the written data.
* @throws ShmopException
*
*/
function shmop_write($shmid, string $data, int $offset): int
{
error_clear_last();
$result = \shmop_write($shmid, $data, $offset);
if ($result === false) {
throw ShmopException::createFromPhpError();
}
return $result;
}