SyncSharedMemory::__construct

(PECL sync >= 1.1.0)

SyncSharedMemory::__construct — Constructs a new SyncSharedMemory object

説明

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

Constructs a named shared memory object.

パラメータ

name: The name of the shared memory object.

注意:
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.

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

戻り値

The new SyncSharedMemory object.

エラー / 例外

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

例

例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")));
?>

参考

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

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