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SyncSharedMemory::__construct

Contents

(PECL sync >= 1.1.0)

SyncSharedMemory::__construct — Constructs a new SyncSharedMemory object

Description

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

Constructs a named shared memory object.

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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.

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Return Values

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

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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")));
?>

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See Also

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Document created the 30/01/2003, last modified the 26/10/2018
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