nsiinterfacerequestor.h

gaca源码

/*
 * DO NOT EDIT.  THIS FILE IS GENERATED FROM nsIInterfaceRequestor.idl
 */

#ifndef __gen_nsIInterfaceRequestor_h__
#define __gen_nsIInterfaceRequestor_h__


#ifndef __gen_nsISupports_h__
#include "nsISupports.h"
#endif

/* For IDL files that don't want to include root IDL files. */
#ifndef NS_NO_VTABLE
#define NS_NO_VTABLE
#endif

/* starting interface:    nsIInterfaceRequestor */
#define NS_IINTERFACEREQUESTOR_IID_STR "033a1470-8b2a-11d3-af88-00a024ffc08c"

#define NS_IINTERFACEREQUESTOR_IID \
  {0x033a1470, 0x8b2a, 0x11d3, \
    { 0xaf, 0x88, 0x00, 0xa0, 0x24, 0xff, 0xc0, 0x8c }}

/**
 * The nsIInterfaceRequestor interface defines a generic interface for 
 * requesting interfaces that a given object might provide access to.
 * This is very similar to QueryInterface found in nsISupports.  
 * The main difference is that interfaces returned from GetInterface()
 * are not required to provide a way back to the object implementing this 
 * interface.  The semantics of QI() dictate that given an interface A that 
 * you QI() on to get to interface B, you must be able to QI on B to get back 
 * to A.  This interface however allows you to obtain an interface C from A 
 * that may or most likely will not have the ability to get back to A. 
 *
 * @status FROZEN
 */
class NS_NO_VTABLE nsIInterfaceRequestor : public nsISupports {
 public: 

  NS_DEFINE_STATIC_IID_ACCESSOR(NS_IINTERFACEREQUESTOR_IID)

  /**
    * Retrieves the specified interface pointer.
    *
    * @param uuid The IID of the interface being requested.
    * @param result [out] The interface pointer to be filled in if
    *               the interface is accessible.
    * @return NS_OK - interface was successfully returned.
    *         NS_NOINTERFACE - interface not accessible.
    *         NS_ERROR* - method failure.
    */
  /* void getInterface (in nsIIDRef uuid, [iid_is (uuid), retval] out nsQIResult result); */
  NS_IMETHOD GetInterface(const nsIID & uuid, void * *result) = 0;

};

/* Use this macro when declaring classes that implement this interface. */
#define NS_DECL_NSIINTERFACEREQUESTOR \
  NS_IMETHOD GetInterface(const nsIID & uuid, void * *result); 

/* Use this macro to declare functions that forward the behavior of this interface to another object. */
#define NS_FORWARD_NSIINTERFACEREQUESTOR(_to) \
  NS_IMETHOD GetInterface(const nsIID & uuid, void * *result) { return _to GetInterface(uuid, result); } 

/* Use this macro to declare functions that forward the behavior of this interface to another object in a safe way. */
#define NS_FORWARD_SAFE_NSIINTERFACEREQUESTOR(_to) \
  NS_IMETHOD GetInterface(const nsIID & uuid, void * *result) { return !_to ? NS_ERROR_NULL_POINTER : _to->GetInterface(uuid, result); } 

#if 0
/* Use the code below as a template for the implementation class for this interface. */

/* Header file */
class nsInterfaceRequestor : public nsIInterfaceRequestor
{
public:
  NS_DECL_ISUPPORTS
  NS_DECL_NSIINTERFACEREQUESTOR

  nsInterfaceRequestor();
  virtual ~nsInterfaceRequestor();
  /* additional members */
};

/* Implementation file */
NS_IMPL_ISUPPORTS1(nsInterfaceRequestor, nsIInterfaceRequestor)

nsInterfaceRequestor::nsInterfaceRequestor()
{
  /* member initializers and constructor code */
}

nsInterfaceRequestor::~nsInterfaceRequestor()
{
  /* destructor code */
}

/* void getInterface (in nsIIDRef uuid, [iid_is (uuid), retval] out nsQIResult result); */
NS_IMETHODIMP nsInterfaceRequestor::GetInterface(const nsIID & uuid, void * *result)
{
    return NS_ERROR_NOT_IMPLEMENTED;
}

/* End of implementation class template. */
#endif


#endif /* __gen_nsIInterfaceRequestor_h__ */