SyncSharedMemory::__construct
(PECL sync >= 1.1.0)
SyncSharedMemory::__construct — Constructs a new SyncSharedMemory object
Description
public SyncSharedMemory::__construct ( string $name , integer $size )Constructs a named shared memory object.
Parameters
name
The name of the shared memory object.
Note: If the name already exists, it must be able to be opened by the current user that the process is running as or an exception will be thrown with a meaningless error message.
size
The size, in bytes, of shared memory to reserve.
Note: The amount of memory cannot be resized later. Request sufficient storage up front.
Return Values
The new SyncSharedMemory object. An exception is thrown if the shared memory object cannot be created or opened.
Examples
Example #1 SyncSharedMemory::__construct() example
<?php
//?You?will?probably?need?to?protect?shared?memory?with?other?synchronization?objects.
//?Shared?memory?goes?away?when?the?last?reference?to?it?disappears.
$mem?=?new?SyncSharedMemory("AppReportName",?1024);
if?($mem->first())
{
????//?Do?first?time?initialization?work?here.
}
$result?=?$mem->write(json_encode(array("name"?=>?"my_report.txt")));
?>See Also
- SyncSharedMemory::first() - Check to see if the object is the first instance system-wide of named shared memory
- SyncSharedMemory::size() - Returns the size of the named shared memory
- SyncSharedMemory::write() - Copy data to named shared memory
- SyncSharedMemory::read() - Copy data from named shared memory
← SyncSharedMemory
SyncSharedMemory::first →
? 1997–2017 The PHP Documentation GroupLicensed under the Creative Commons Attribution License v3.0 or later.
本文档系腾讯云开发者社区成员共同维护，如有问题请联系 cloudcommunity@tencent.com
