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gecko-dev/xpcom/base/nsISupportsObsolete.h

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/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is XPCOM.
*
* The Initial Developer of the Original Code is Netscape Communications Corp.
* Portions created by the Initial Developer are Copyright (C) 2001
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef nsISupportsObsolete_h__
#define nsISupportsObsolete_h__
#if defined(NS_MT_SUPPORTED)
#include "prcmon.h"
#endif /* NS_MT_SUPPORTED */
///////////////////////////////////////////////////////////////////////////////
#define NS_INIT_REFCNT() NS_INIT_ISUPPORTS()
#define NS_DECL_ISUPPORTS_EXPORTED \
public: \
NS_EXPORT NS_IMETHOD QueryInterface(REFNSIID aIID, \
void** aInstancePtr); \
NS_EXPORT NS_IMETHOD_(nsrefcnt) AddRef(void); \
NS_EXPORT NS_IMETHOD_(nsrefcnt) Release(void); \
protected: \
nsrefcnt mRefCnt; \
NS_DECL_OWNINGTHREAD \
public:
#ifdef NS_DEBUG
/*
* Adding this debug-only function as per bug #26803. If you are debugging
* and this function returns wrong refcounts, fix the objects |AddRef()| and
* |Release()| to do the right thing.
*
* Of course, this function is only available for debug builds.
*/
inline
nsrefcnt
NS_DebugGetRefCount( nsISupports* obj )
// Warning: don't apply this to an object whose refcount is
// |0| or not yet initialized ... it may be destroyed.
{
nsrefcnt ref_count = 0;
if ( obj )
{
// |AddRef()| and |Release()| are supposed to return
// the new refcount of the object
obj->AddRef();
ref_count = obj->Release();
// Can't use |NS_[ADDREF|RELEASE]| since (a) they _don't_ return
// the refcount, and (b) we don't want to log these guaranteed
// balanced calls.
NS_ASSERTION(ref_count,
"Oops! Calling |NS_DebugGetRefCount()| probably just "
"destroyed this object.");
}
return ref_count;
}
#endif // NS_DEBUG
/**
* Macro to free an array of pointers to nsISupports (or classes
* derived from it). A convenience wrapper around
* NS_FREE_XPCOM_POINTER_ARRAY.
*
* Note that if you know that none of your nsISupports pointers are
* going to be 0, you can gain a bit of speed by calling
* NS_FREE_XPCOM_POINTER_ARRAY directly and using NS_RELEASE as your
* free function.
*
* @param size Number of elements in the array. If not a constant, this
* should be a PRInt32. Note that this means this macro
* will not work if size >= 2^31.
* @param array The array to be freed.
*/
#define NS_FREE_XPCOM_ISUPPORTS_POINTER_ARRAY(size, array) \
NS_FREE_XPCOM_POINTER_ARRAY((size), (array), NS_IF_RELEASE)
///////////////////////////////////////////////////////////////////////////////
/* use these functions to associate get/set methods with a
C++ member variable
*/
#define NS_METHOD_GETTER(_method, _type, _member) \
_method(_type* aResult) \
{\
if (!aResult) return NS_ERROR_NULL_POINTER; \
*aResult = _member; \
return NS_OK; \
}
#define NS_METHOD_SETTER(_method, _type, _member) \
_method(_type aResult) \
{ \
_member = aResult; \
return NS_OK; \
}
/*
* special for strings to get/set char* strings
* using PL_strdup and PR_FREEIF
*/
#define NS_METHOD_GETTER_STR(_method,_member) \
_method(char* *aString)\
{\
if (!aString) return NS_ERROR_NULL_POINTER; \
*aString = PL_strdup(_member); \
return NS_OK; \
}
#define NS_METHOD_SETTER_STR(_method, _member) \
_method(const char *aString)\
{\
PR_FREEIF(_member);\
if (aString) _member = PL_strdup(aString); \
else _member = nsnull;\
return NS_OK; \
}
/* Getter/Setter macros.
Usage:
NS_IMPL_[CLASS_]GETTER[_<type>](method, [type,] member);
NS_IMPL_[CLASS_]SETTER[_<type>](method, [type,] member);
NS_IMPL_[CLASS_]GETSET[_<type>]([class, ]postfix, [type,] member);
where:
CLASS_ - implementation is inside a class definition
(otherwise the class name is needed)
Do NOT use in publicly exported header files, because
the implementation may be included many times over.
Instead, use the non-CLASS_ version.
_<type> - For more complex (STR, IFACE) data types
(otherwise the simple data type is needed)
method - name of the method, such as GetWidth or SetColor
type - simple data type if required
member - class member variable such as m_width or mColor
class - the class name, such as Window or MyObject
postfix - Method part after Get/Set such as "Width" for "GetWidth"
Example:
class Window {
public:
NS_IMPL_CLASS_GETSET(Width, int, m_width);
NS_IMPL_CLASS_GETTER_STR(GetColor, m_color);
NS_IMETHOD SetColor(char *color);
private:
int m_width; // read/write
char *m_color; // readonly
};
// defined outside of class
NS_IMPL_SETTER_STR(Window::GetColor, m_color);
Questions/Comments to alecf@netscape.com
*/
/*
* Getter/Setter implementation within a class definition
*/
/* simple data types */
#define NS_IMPL_CLASS_GETTER(_method, _type, _member) \
NS_IMETHOD NS_METHOD_GETTER(_method, _type, _member)
#define NS_IMPL_CLASS_SETTER(_method, _type, _member) \
NS_IMETHOD NS_METHOD_SETTER(_method, _type, _member)
#define NS_IMPL_CLASS_GETSET(_postfix, _type, _member) \
NS_IMPL_CLASS_GETTER(Get##_postfix, _type, _member) \
NS_IMPL_CLASS_SETTER(Set##_postfix, _type, _member)
/* strings */
#define NS_IMPL_CLASS_GETTER_STR(_method, _member) \
NS_IMETHOD NS_METHOD_GETTER_STR(_method, _member)
#define NS_IMPL_CLASS_SETTER_STR(_method, _member) \
NS_IMETHOD NS_METHOD_SETTER_STR(_method, _member)
#define NS_IMPL_CLASS_GETSET_STR(_postfix, _member) \
NS_IMPL_CLASS_GETTER_STR(Get##_postfix, _member) \
NS_IMPL_CLASS_SETTER_STR(Set##_postfix, _member)
/* Getter/Setter implementation outside of a class definition */
/* simple data types */
#define NS_IMPL_GETTER(_method, _type, _member) \
NS_IMETHODIMP NS_METHOD_GETTER(_method, _type, _member)
#define NS_IMPL_SETTER(_method, _type, _member) \
NS_IMETHODIMP NS_METHOD_SETTER(_method, _type, _member)
#define NS_IMPL_GETSET(_class, _postfix, _type, _member) \
NS_IMPL_GETTER(_class::Get##_postfix, _type, _member) \
NS_IMPL_SETTER(_class::Set##_postfix, _type, _member)
/* strings */
#define NS_IMPL_GETTER_STR(_method, _member) \
NS_IMETHODIMP NS_METHOD_GETTER_STR(_method, _member)
#define NS_IMPL_SETTER_STR(_method, _member) \
NS_IMETHODIMP NS_METHOD_SETTER_STR(_method, _member)
#define NS_IMPL_GETSET_STR(_class, _postfix, _member) \
NS_IMPL_GETTER_STR(_class::Get##_postfix, _member) \
NS_IMPL_SETTER_STR(_class::Set##_postfix, _member)
/**
* IID for the nsIsThreadsafe interface
* {88210890-47a6-11d2-bec3-00805f8a66dc}
*
* This interface is *only* used for debugging purposes to determine if
* a given component is threadsafe.
*/
#define NS_ISTHREADSAFE_IID \
{ 0x88210890, 0x47a6, 0x11d2, \
{0xbe, 0xc3, 0x00, 0x80, 0x5f, 0x8a, 0x66, 0xdc} }
#if defined(NS_MT_SUPPORTED)
#define NS_LOCK_INSTANCE() \
PR_CEnterMonitor((void*)this)
#define NS_UNLOCK_INSTANCE() \
PR_CExitMonitor((void*)this)
#else
#define NS_LOCK_INSTANCE()
#define NS_UNLOCK_INSTANCE()
#endif
/**
* This implements query interface with two assumptions: First, the
* class in question implements nsISupports and its own interface and
* nothing else. Second, the implementation of the class's primary
* inheritance chain leads to its own interface.
*
* @param _class The name of the class implementing the method
* @param _classiiddef The name of the #define symbol that defines the IID
* for the class (e.g. NS_ISUPPORTS_IID)
*/
#if defined(NS_DEBUG)
#define NS_VERIFY_THREADSAFE_INTERFACE(_iface) \
if (NULL != (_iface)) { \
nsISupports* tmp; \
static NS_DEFINE_IID(kIsThreadsafeIID, NS_ISTHREADSAFE_IID); \
NS_PRECONDITION((NS_OK == _iface->QueryInterface(kIsThreadsafeIID, \
(void**)&tmp)), \
"Interface is not threadsafe"); \
}
#else
#define NS_VERIFY_THREADSAFE_INTERFACE(_iface)
#endif
#define NS_IMPL_THREADSAFE_ISUPPORTS(_class,_classiiddef) \
NS_IMPL_THREADSAFE_ADDREF(_class) \
NS_IMPL_THREADSAFE_RELEASE(_class) \
NS_IMPL_THREADSAFE_QUERY_INTERFACE(_class,_classiiddef)
/*
The following macro is deprecated. We need to switch all instances
to |NS_IMPL_QUERY_INTERFACE1|, or |NS_IMPL_QUERY_INTERFACE0| depending
on how they were using it.
*/
#define NS_IMPL_QUERY_INTERFACE(_class,_classiiddef) \
NS_IMETHODIMP _class::QueryInterface(REFNSIID aIID, void** aInstancePtr) \
{ \
if (NULL == aInstancePtr) { \
return NS_ERROR_NULL_POINTER; \
} \
\
*aInstancePtr = NULL; \
\
static NS_DEFINE_IID(kClassIID, _classiiddef); \
if (aIID.Equals(kClassIID)) { \
*aInstancePtr = (void*) this; \
NS_ADDREF_THIS(); \
return NS_OK; \
} \
if (aIID.Equals(NS_GET_IID(nsISupports))) { \
*aInstancePtr = (void*) ((nsISupports*)this); \
NS_ADDREF_THIS(); \
return NS_OK; \
} \
return NS_NOINTERFACE; \
}
/**
* Convenience macro for implementing all nsISupports methods for
* a simple class.
* @param _class The name of the class implementing the method
* @param _classiiddef The name of the #define symbol that defines the IID
* for the class (e.g. NS_ISUPPORTS_IID)
*/
#define NS_IMPL_ISUPPORTS(_class,_classiiddef) \
NS_IMPL_ADDREF(_class) \
NS_IMPL_RELEASE(_class) \
NS_IMPL_QUERY_INTERFACE(_class,_classiiddef)
#define NS_IMPL_ISUPPORTS0(_class) \
NS_IMPL_ADDREF(_class) \
NS_IMPL_RELEASE(_class) \
NS_IMPL_QUERY_INTERFACE0(_class)
#define NS_IMPL_ISUPPORTS1(_class, _interface) \
NS_IMPL_ADDREF(_class) \
NS_IMPL_RELEASE(_class) \
NS_IMPL_QUERY_INTERFACE1(_class, _interface)
#define NS_IMPL_ISUPPORTS2(_class, _i1, _i2) \
NS_IMPL_ADDREF(_class) \
NS_IMPL_RELEASE(_class) \
NS_IMPL_QUERY_INTERFACE2(_class, _i1, _i2)
#define NS_IMPL_ISUPPORTS3(_class, _i1, _i2, _i3) \
NS_IMPL_ADDREF(_class) \
NS_IMPL_RELEASE(_class) \
NS_IMPL_QUERY_INTERFACE3(_class, _i1, _i2, _i3)
#define NS_IMPL_ISUPPORTS4(_class, _i1, _i2, _i3, _i4) \
NS_IMPL_ADDREF(_class) \
NS_IMPL_RELEASE(_class) \
NS_IMPL_QUERY_INTERFACE4(_class, _i1, _i2, _i3, _i4)
#define NS_IMPL_ISUPPORTS5(_class, _i1, _i2, _i3, _i4, _i5) \
NS_IMPL_ADDREF(_class) \
NS_IMPL_RELEASE(_class) \
NS_IMPL_QUERY_INTERFACE5(_class, _i1, _i2, _i3, _i4, _i5)
#define NS_IMPL_ISUPPORTS6(_class, _i1, _i2, _i3, _i4, _i5, _i6) \
NS_IMPL_ADDREF(_class) \
NS_IMPL_RELEASE(_class) \
NS_IMPL_QUERY_INTERFACE6(_class, _i1, _i2, _i3, _i4, _i5, _i6)
#define NS_IMPL_ISUPPORTS7(_class, _i1, _i2, _i3, _i4, _i5, _i6, _i7) \
NS_IMPL_ADDREF(_class) \
NS_IMPL_RELEASE(_class) \
NS_IMPL_QUERY_INTERFACE7(_class, _i1, _i2, _i3, _i4, _i5, _i6, _i7)
#define NS_IMPL_ISUPPORTS8(_class, _i1, _i2, _i3, _i4, _i5, _i6, _i7, _i8) \
NS_IMPL_ADDREF(_class) \
NS_IMPL_RELEASE(_class) \
NS_IMPL_QUERY_INTERFACE8(_class, _i1, _i2, _i3, _i4, _i5, _i6, _i7, _i8)
#define NS_IMPL_ISUPPORTS9(_class, _i1, _i2, _i3, _i4, _i5, _i6, _i7, _i8, \
_i9) \
NS_IMPL_ADDREF(_class) \
NS_IMPL_RELEASE(_class) \
NS_IMPL_QUERY_INTERFACE9(_class, _i1, _i2, _i3, _i4, _i5, _i6, _i7, _i8, _i9)
#define NS_IMPL_ISUPPORTS10(_class, _i1, _i2, _i3, _i4, _i5, _i6, _i7, _i8, \
_i9, _i10) \
NS_IMPL_ADDREF(_class) \
NS_IMPL_RELEASE(_class) \
NS_IMPL_QUERY_INTERFACE10(_class, _i1, _i2, _i3, _i4, _i5, _i6, _i7, _i8, \
_i9, _i10)
////////////////////////////////////////////////////////////////////////////////
#define NS_IMPL_QUERY_INTERFACE_INHERITED(Class, Super, i1) \
NS_IMPL_QUERY_INTERFACE_INHERITED1(Class, Super, i1)
// below should go into nsIMemoryUtils.h or something similar.
/**
* Macro to free all elements of an XPCOM array of a given size using
* freeFunc, then frees the array itself using nsMemory::Free().
*
* Note that this macro (and its wrappers) can be used to deallocate a
* partially- or completely-built array while unwinding an error
* condition inside the XPCOM routine that was going to return the
* array. For this to work on a partially-built array, your code
* needs to be building the array from index 0 upwards, and simply
* pass the number of elements that have already been built (and thus
* need to be freed) as |size|.
*
* Thanks to <alecf@netscape.com> for suggesting this form, which
* allows the macro to be used with NS_RELEASE / NS_RELEASE_IF in
* addition to nsMemory::Free.
*
* @param size Number of elements in the array. If not a constant, this
* should be a PRInt32. Note that this means this macro
* will not work if size >= 2^31.
* @param array The array to be freed.
* @param freeFunc The function or macro to be used to free it.
* For arrays of nsISupports (or any class derived
* from it), NS_IF_RELEASE (or NS_RELEASE) should be
* passed as freeFunc. For most (all?) other pointer
* types (including XPCOM strings and wstrings),
* nsMemory::Free should be used, since the
* shared-allocator (nsMemory) is what will have been
* used to allocate the memory.
*/
#define NS_FREE_XPCOM_POINTER_ARRAY(size, array, freeFunc) \
PR_BEGIN_MACRO \
PRInt32 iter_ = PRInt32(size); \
while (--iter_ >= 0) \
freeFunc((array)[iter_]); \
nsMemory::Free((array)); \
PR_END_MACRO
// convenience macros for commonly used calls. mmmmm. syntactic sugar.
/**
* Macro to free arrays of non-refcounted objects allocated by the
* shared allocator (nsMemory) such as strings and wstrings. A
* convenience wrapper around NS_FREE_XPCOM_POINTER_ARRAY.
*
* @param size Number of elements in the array. If not a constant, this
* should be a PRInt32. Note that this means this macro
* will not work if size >= 2^31.
* @param array The array to be freed.
*/
#define NS_FREE_XPCOM_ALLOCATED_POINTER_ARRAY(size, array) \
NS_FREE_XPCOM_POINTER_ARRAY((size), (array), nsMemory::Free)
/**
* Macro to free an array of pointers to nsISupports (or classes
* derived from it). A convenience wrapper around
* NS_FREE_XPCOM_POINTER_ARRAY.
*
* Note that if you know that none of your nsISupports pointers are
* going to be 0, you can gain a bit of speed by calling
* NS_FREE_XPCOM_POINTER_ARRAY directly and using NS_RELEASE as your
* free function.
*
* @param size Number of elements in the array. If not a constant, this
* should be a PRInt32. Note that this means this macro
* will not work if size >= 2^31.
* @param array The array to be freed.
*/
#define NS_FREE_XPCOM_ISUPPORTS_POINTER_ARRAY(size, array) \
NS_FREE_XPCOM_POINTER_ARRAY((size), (array), NS_IF_RELEASE)
#endif
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