imoduleallocator-allocatememory-method.md

title	IModuleAllocator::AllocateMemory Method
ms.date	10/07/2016
description	With IModuleAllocator, the AllocateMemory method allocates a specified amount of memory that is specified by the cbAllocation parameter.
ms.assetid	0d96c164-62ed-4ee5-89ad-77961d929411

IModuleAllocator::AllocateMemory Method

Allocates a specified amount of memory.

Syntax

virtual VOID* AllocateMemory(  
   IN DWORD cbAllocation  
) = 0;  

Parameters

cbAllocation
[IN] The number of bytes to allocate.

Return Value

A pointer to VOID.

Remarks

The AllocateMemory method allocates an amount of memory that is specified by the cbAllocation parameter. This memory is allocated within the request memory pool, which is faster than allocating memory on the heap.

Example

The following code example demonstrates how to use the AllocateMemory method to create an HTTP module that allocates a 1-KB buffer. The example then copies a string into the buffer and returns the response to a Web client.

[!code-cppIModuleAllocatorAllocateMemory#1]

Your module must export the RegisterModule function. You can export this function by creating a module definition (.def) file for your project, or you can compile the module by using the /EXPORT:RegisterModule switch. For more information, see Walkthrough: Creating a Request-Level HTTP Module By Using Native Code.

You can optionally compile the code by using the __stdcall (/Gz) calling convention instead of explicitly declaring the calling convention for each function.

Requirements

Type	Description
Client	- IIS 7.0 on [!INCLUDEwinvista] - IIS 7.5 on Windows 7 - IIS 8.0 on Windows 8 - IIS 10.0 on Windows 10
Server	- IIS 7.0 on [!INCLUDEwinsrv2008] - IIS 7.5 on Windows Server 2008 R2 - IIS 8.0 on Windows Server 2012 - IIS 8.5 on Windows Server 2012 R2 - IIS 10.0 on Windows Server 2016
Product	- IIS 7.0, IIS 7.5, IIS 8.0, IIS 8.5, IIS 10.0 - [!INCLUDEiisexp75], [!INCLUDEiisexp80], [!INCLUDEiisexp100]
Header	Httpserv.h

See Also

IModuleAllocator Interface