PHP Manual
SyncSharedMemory
Constructs a new SyncSharedMemory object

SyncSharedMemory::__construct

(PECL sync >= 1.1.0)

SyncSharedMemory::__construct — Constructs a new SyncSharedMemory object

Описание

public SyncSharedMemory::__construct ( string $name , int $size )

Constructs a named shared memory object.

Список параметров

name: The name of the shared memory object.

Замечание:
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.

Замечание:
The amount of memory cannot be resized later. Request sufficient storage up front.

Возвращаемые значения

The new SyncSharedMemory object. An exception is thrown if the shared memory object cannot be created or opened.

Примеры

Пример #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")));
?>

Смотрите также

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