The Tor Browser: xpcom/base/nsISupportsBase.h@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 /* This Source Code Form is subject to the terms of the Mozilla Public

     2  * License, v. 2.0. If a copy of the MPL was not distributed with this

     3  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     4 // IWYU pragma: private, include "nsISupports.h"

     6 #ifndef nsISupportsBase_h__

     7 #define nsISupportsBase_h__

     9 #ifndef nscore_h___

    10 #include "nscore.h"

    11 #endif

    13 #ifndef nsID_h__

    14 #include "nsID.h"

    15 #endif

    18 /*@{*/

    19 /**

    20  * IID for the nsISupports interface

    21  * {00000000-0000-0000-c000-000000000046}

    22  *

    23  * To maintain binary compatibility with COM's IUnknown, we define the IID

    24  * of nsISupports to be the same as that of COM's IUnknown.

    25  */

    26 #define NS_ISUPPORTS_IID                                                      \

    27   { 0x00000000, 0x0000, 0x0000,                                               \

    28     {0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x46} }

    30 /**

    31  * Basic component object model interface. Objects which implement

    32  * this interface support runtime interface discovery (QueryInterface)

    33  * and a reference counted memory model (AddRef/Release). This is

    34  * modelled after the win32 IUnknown API.

    35  */

    36 class NS_NO_VTABLE nsISupports {

    37 public:

    39   NS_DECLARE_STATIC_IID_ACCESSOR(NS_ISUPPORTS_IID)

    41   /**

    42    * @name Methods

    43    */

    45   //@{

    46   /**

    47    * A run time mechanism for interface discovery.

    48    * @param aIID [in] A requested interface IID

    49    * @param aInstancePtr [out] A pointer to an interface pointer to

    50    * receive the result.

    51    * @return <b>NS_OK</b> if the interface is supported by the associated

    52    * instance, <b>NS_NOINTERFACE</b> if it is not.

    53    *

    54    * aInstancePtr must not be null.

    55    */

    56   NS_IMETHOD QueryInterface(REFNSIID aIID, void** aInstancePtr) = 0;

    57   /**

    58    * Increases the reference count for this interface.

    59    * The associated instance will not be deleted unless

    60    * the reference count is returned to zero.

    61    *

    62    * @return The resulting reference count.

    63    */

    64   NS_IMETHOD_(MozExternalRefCountType) AddRef(void) = 0;

    66   /**

    67    * Decreases the reference count for this interface.

    68    * Generally, if the reference count returns to zero,

    69    * the associated instance is deleted.

    70    *

    71    * @return The resulting reference count.

    72    */

    73   NS_IMETHOD_(MozExternalRefCountType) Release(void) = 0;

    75   //@}

    76 };

    78 NS_DEFINE_STATIC_IID_ACCESSOR(nsISupports, NS_ISUPPORTS_IID)

    80 /*@}*/

    82 #endif

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