/usr/include/wvstreams/xplc/IObject.h is in libwvstreams-dev 4.6.1-5.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 | /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* XPLC - Cross-Platform Lightweight Components
* Copyright (C) 2000-2003, Pierre Phaneuf
* Copyright (C) 2002, Net Integration Technologies, Inc.
* Copyright (C) 2002, Stéphane Lajoie
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*/
#ifndef __XPLC_IOBJECT_H__
#define __XPLC_IOBJECT_H__
#if defined(__GNUC__) && __GNUC__ > 3
# pragma GCC system_header
#endif
/** \file
*
* This file contains the %XPLC foundation interface.
*/
#include <xplc/uuid.h>
#ifndef UNSTABLE
/**
* Used to mark an interface as unstable. Add an UNSTABLE_INTERFACE
* declaration to your object if you don't want people to use your
* interface without knowing the interface might change from
* underneath them. They will then have to \#define UNSTABLE if they
* want their program to compile.
*/
#define UNSTABLE_INTERFACE static bool UNSTABLE_INTERFACE = true;
#else
#define UNSTABLE_INTERFACE
#endif
class IWeakRef;
/** \interface IObject IObject.h xplc/IObject.h
*
* The basic interface which is included by all other %XPLC interfaces
* and objects. It provides a standard method to say you're using an
* object, to say you're done, and to retrieve other %XPLC interfaces
* from the object.
*
* Usually you will not implement these functions yourself; use
* the IMPLEMENT_IOBJECT macro instead.
*
* \sa IMPLEMENT_IOBJECT, mutate(), get(), xplc_ptr, XPLC
*/
class IObject {
UNSTABLE_INTERFACE
public:
/**
* Indicate you are using this object. This increases the reference
* count of the object by one. Usually, when the reference count
* reaches zero, the object is freed automatically.
*
* This called a "strong reference", because they will prevent the
* object from being destroyed. They should thus be used carefully,
* as they control the lifetime of the object. For example, you do
* not need to call addRef() on object passed as parameters, unless
* you intend on keeping them.
*
* addRef() is often called automatically for you in %XPLC, but
* you'll have to call release() by hand sometimes unless you use
* xplc_ptr.
*/
virtual unsigned int addRef() = 0;
/**
* Indicate that you are finished using this object. This decreases
* the reference count of the object by one. Usually, when the
* reference count reaches zero, the object is freed automatically.
*
* You will usually need to manually release() any object given to
* you by any other %XPLC function, unless you give the object to
* someone else who will call release.
*
* If you use xplc_ptr, it will do this for you.
*/
virtual unsigned int release() = 0;
/**
* Returns the requested %XPLC interface. Will return NULL if the
* interface is not supported. The returned interface has been
* addRef()ed, so you will need to release() it when done. Note
* that the interface returned may be a pointer to the same object
* or a different one - that's none of your business. Asking for the
* IObject interface should always return the same pointer for a
* given logical object, so this can be used for comparison by
* identity.
*
* You should probably use the convenient mutate() and get()
* functions instead of this, or use an xplc_ptr, which mutates the
* object for you.
*/
virtual IObject* getInterface(const UUID&) = 0;
/**
* Return a weak reference to this object. A weak reference points
* at the object, but does not control the lifetime of the object.
* An object can thus still be deleted while someone holds a weak
* reference. You will still need to release() the weak reference
* when you are done with it.
*
* \sa IWeakRef
*/
virtual IWeakRef* getWeakRef() = 0;
};
/// IObject's IID
DEFINE_IID(IObject, {0x8ca76e98, 0xb653, 0x43d7,
{0xb0, 0x56, 0x8b, 0x9d, 0xde, 0x9a, 0xbe, 0x9d}});
#endif /* __XPLC_IOBJECT_H__ */
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