PageRenderTime 45ms CodeModel.GetById 23ms RepoModel.GetById 1ms app.codeStats 0ms

/gecko_api/include/nsWeakReference.h

http://firefox-mac-pdf.googlecode.com/
C Header | 96 lines | 37 code | 16 blank | 43 comment | 1 complexity | 20f27c786fd31e5d7999c77e7ea88098 MD5 | raw file
  1. /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
  2. *
  3. * ***** BEGIN LICENSE BLOCK *****
  4. * Version: MPL 1.1/GPL 2.0/LGPL 2.1
  5. *
  6. * The contents of this file are subject to the Mozilla Public License Version
  7. * 1.1 (the "License"); you may not use this file except in compliance with
  8. * the License. You may obtain a copy of the License at
  9. * http://www.mozilla.org/MPL/
  10. *
  11. * Software distributed under the License is distributed on an "AS IS" basis,
  12. * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  13. * for the specific language governing rights and limitations under the
  14. * License.
  15. *
  16. * The Original Code is the Mozilla browser.
  17. *
  18. * The Initial Developer of the Original Code is
  19. * Netscape Communications, Inc.
  20. * Portions created by the Initial Developer are Copyright (C) 1999
  21. * the Initial Developer. All Rights Reserved.
  22. *
  23. * Contributor(s):
  24. * Scott Collins <scc@netscape.com>
  25. *
  26. * Alternatively, the contents of this file may be used under the terms of
  27. * either of the GNU General Public License Version 2 or later (the "GPL"),
  28. * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
  29. * in which case the provisions of the GPL or the LGPL are applicable instead
  30. * of those above. If you wish to allow use of your version of this file only
  31. * under the terms of either the GPL or the LGPL, and not to allow others to
  32. * use your version of this file under the terms of the MPL, indicate your
  33. * decision by deleting the provisions above and replace them with the notice
  34. * and other provisions required by the GPL or the LGPL. If you do not delete
  35. * the provisions above, a recipient may use your version of this file under
  36. * the terms of any one of the MPL, the GPL or the LGPL.
  37. *
  38. * ***** END LICENSE BLOCK ***** */
  39. #ifndef nsWeakReference_h__
  40. #define nsWeakReference_h__
  41. // nsWeakReference.h
  42. #include "nsIWeakReference.h"
  43. #include "nsIWeakReferenceUtils.h"
  44. class nsWeakReference;
  45. // Set IMETHOD_VISIBILITY to empty so that the class-level NS_COM declaration
  46. // controls member method visibility.
  47. #undef IMETHOD_VISIBILITY
  48. #define IMETHOD_VISIBILITY NS_COM_GLUE
  49. class NS_COM_GLUE nsSupportsWeakReference : public nsISupportsWeakReference
  50. {
  51. public:
  52. nsSupportsWeakReference()
  53. : mProxy(0)
  54. {
  55. // nothing else to do here
  56. }
  57. NS_DECL_NSISUPPORTSWEAKREFERENCE
  58. protected:
  59. inline ~nsSupportsWeakReference();
  60. private:
  61. friend class nsWeakReference;
  62. void
  63. NoticeProxyDestruction()
  64. // ...called (only) by an |nsWeakReference| from _its_ dtor.
  65. {
  66. mProxy = 0;
  67. }
  68. nsWeakReference* mProxy;
  69. protected:
  70. void ClearWeakReferences();
  71. PRBool HasWeakReferences() const {return mProxy != 0;}
  72. };
  73. #undef IMETHOD_VISIBILITY
  74. #define IMETHOD_VISIBILITY NS_VISIBILITY_HIDDEN
  75. inline
  76. nsSupportsWeakReference::~nsSupportsWeakReference()
  77. {
  78. ClearWeakReferences();
  79. }
  80. #endif