IGlobalRSCAQueryProvider::GetOutputBuffer Method

Article
03/09/2018

Creates a new BYTE array.

Syntax

virtual HRESULT GetOutputBuffer(  
   DWORD cbBuffer,  
   OUT BYTE** ppbBuffer  
) = 0;

Parameters

cbBuffer
[IN] A DWORD that contains the number of bytes to allocate.

ppbBuffer
[OUT] A pointer to a BYTE array that contains the new buffer.

Return Value

An HRESULT. Possible values include, but are not limited to, those in the following table.

Value	Definition
S_OK	Indicates that the operation was successful.
E_OUTOFMEMORY	Indicates that heap memory is exhausted.

Remarks

CGlobalModule derived classes that register for GL_RSCA_QUERY events receive an IGlobalRscaQueryProvider pointer as a parameter on the CGlobalModule::OnGlobalRSCAQueryvirtual method. You can then retrieve a new BYTE array by calling the GetOutputBuffer method on the IGlobalRSCAQueryProvider pointer.

The GetOutputBuffer return value depends on implementation. You should use the following information as a guideline, but it may not be correct in all scenarios:

The IGlobalRSCAQueryProvider implementer declares a private BYTE pointer as a member variable called buffer; the implementer initializes buffer to NULL at construction. If buffer is not NULL when GetOutputBuffer is called, the LocalFree function is called on buffer. The LocalAlloc function is called to assign buffer to a new BYTE array of size cbBuffer on the heap. buffer is then returned in the dereferenced ppbBuffer parameter if GetOutputBuffer returns S_OK.

Important This method is part of the IIS 7 infrastructure and is not intended to be used directly from your code.

Notes for Implementers

IGlobalRSCAQueryProvider implementers are responsible for memory management with this data; therefore, IGlobalRSCAQueryProvider implementers that use dynamic memory allocation must release or call delete on the BYTE pointer when it is no longer needed.

Notes for Callers

IGlobalRSCAQueryProvider implementers are responsible for memory management with this data; therefore, IGlobalRSCAQueryProvider clients must not release or call delete on the returned BYTE pointer when this data is no longer needed.

Requirements

Type	Description
Client	- IIS 7.0 on Windows Vista - IIS 7.5 on Windows 7 - IIS 8.0 on Windows 8 - IIS 10.0 on Windows 10
Server	- IIS 7.0 on Windows Server 2008 - 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 Technical Preview
Product	- IIS 7.0, IIS 7.5, IIS 8.0, IIS 8.5, IIS 10.0 - IIS Express 7.5, IIS Express 8.0, IIS Express 10.0
Header	Httpserv.h

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