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// Test02.cpp
#include "nsIDOMNode.h"
#include "nsCOMPtr.h"
#include "nsString.h"
NS_DEF_PTR(nsIDOMNode);
/*
This test file compares the generated code size of similar functions between raw
COM interface pointers (|AddRef|ing and |Release|ing by hand) and |nsCOMPtr|s.
Function size results were determined by examining dissassembly of the generated code.
mXXX is the size of the generated code on the Macintosh. wXXX is the size on Windows.
For these tests, all reasonable optimizations were enabled and exceptions were
disabled (just as we build for release).
The tests in this file explore more complicated functionality: assigning a pointer
to be reference counted into a [raw, nsCOMPtr] object using |QueryInterface|;
ensuring that it is |AddRef|ed and |Release|d appropriately; calling through the pointer
to a function supplied by the underlying COM interface. The tests in this file expand
on the tests in "Test01.cpp" by adding |QueryInterface|.
Windows:
raw01 52
nsCOMPtr 63
raw 66
nsCOMPtr* 68
Macintosh:
nsCOMPtr 120 (1.0000)
Raw01 128 (1.1429) i.e., 14.29% bigger than nsCOMPtr
Raw00 144 (1.2000)
*/
void // nsresult
Test02_Raw00( nsISupports* aDOMNode, nsString* aResult )
// m144, w66
{
// -- the following code is assumed, but is commented out so we compare only
// the relevent generated code
// if ( !aDOMNode )
// return NS_ERROR_NULL_POINTER;
nsIDOMNode* node = 0;
nsresult status = aDOMNode->QueryInterface(NS_GET_IID(nsIDOMNode), (void**)&node);
if ( NS_SUCCEEDED(status) )
{
node->GetNodeName(*aResult);
}
NS_IF_RELEASE(node);
// return status;
}
void // nsresult
Test02_Raw01( nsISupports* aDOMNode, nsString* aResult )
// m128, w52
{
// if ( !aDOMNode )
// return NS_ERROR_NULL_POINTER;
nsIDOMNode* node;
nsresult status = aDOMNode->QueryInterface(NS_GET_IID(nsIDOMNode), (void**)&node);
if ( NS_SUCCEEDED(status) )
{
node->GetNodeName(*aResult);
NS_RELEASE(node);
}
// return status;
}
void // nsresult
Test02_nsCOMPtr( nsISupports* aDOMNode, nsString* aResult )
// m120, w63/68
{
nsresult status;
nsCOMPtr<nsIDOMNode> node = do_QueryInterface(aDOMNode, &status);
if ( node )
node->GetNodeName(*aResult);
// return status;
}
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