D-Bus 1.16.0

dbus-dataslot.h
1/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
2/* dbus-dataslot.h storing data on objects
3 *
4 * Copyright (C) 2003 Red Hat, Inc.
5 *
6 * SPDX-License-Identifier: AFL-2.1 OR GPL-2.0-or-later
7 *
8 * Licensed under the Academic Free License version 2.1
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 *
24 */
25#ifndef DBUS_DATASLOT_H
26#define DBUS_DATASLOT_H
27
28#include <dbus/dbus-internals.h>
29
30 DBUS_BEGIN_DECLS
31
32 typedef struct DBusDataSlotAllocator DBusDataSlotAllocator;
33 typedef struct DBusDataSlotList DBusDataSlotList;
34
36 typedef struct DBusDataSlot DBusDataSlot;
38 struct DBusDataSlot
39{
40 void *data;
41 DBusFreeFunction free_data_func;
42};
43
44 typedef struct DBusAllocatedSlot DBusAllocatedSlot;
45
48 struct DBusAllocatedSlot
49{
50 dbus_int32_t slot_id;
51 int refcount;
52};
53
57 struct DBusDataSlotAllocator
58{
59 DBusAllocatedSlot *allocated_slots;
60 int n_allocated_slots;
61 int n_used_slots;
62 DBusGlobalLock lock;
63};
64
65#define _DBUS_DATA_SLOT_ALLOCATOR_INIT(x) { NULL, 0, 0, x }
66
71 struct DBusDataSlotList
72{
73 DBusDataSlot *slots;
74 int n_slots;
75};
76
77 dbus_bool_t _dbus_data_slot_allocator_init (DBusDataSlotAllocator *allocator,
78 DBusGlobalLock lock);
79 dbus_bool_t _dbus_data_slot_allocator_alloc (DBusDataSlotAllocator *allocator,
80 int *slot_id_p);
81 void _dbus_data_slot_allocator_free (DBusDataSlotAllocator *allocator,
82 int *slot_id_p);
83 void _dbus_data_slot_list_init (DBusDataSlotList *list);
84 dbus_bool_t _dbus_data_slot_list_set (DBusDataSlotAllocator *allocator,
85 DBusDataSlotList *list,
86 int slot,
87 void *data,
88 DBusFreeFunction free_data_func,
89 DBusFreeFunction *old_free_func,
90 void **old_data);
91 void* _dbus_data_slot_list_get (DBusDataSlotAllocator *allocator,
92 DBusDataSlotList *list,
93 int slot);
94 void _dbus_data_slot_list_clear (DBusDataSlotList *list);
95 void _dbus_data_slot_list_free (DBusDataSlotList *list);
96
97
98 DBUS_END_DECLS
99
100#endif /* DBUS_DATASLOT_H */
_dbus_data_slot_allocator_free
void _dbus_data_slot_allocator_free(DBusDataSlotAllocator *allocator, int *slot_id_p)
Deallocates an ID previously allocated with _dbus_data_slot_allocator_alloc().
Definition dbus-dataslot.c:157
_dbus_data_slot_list_clear
void _dbus_data_slot_list_clear(DBusDataSlotList *list)
Frees all data slots contained in the list, calling application-provided free functions if they exist...
Definition dbus-dataslot.c:320
_dbus_data_slot_allocator_init
dbus_bool_t _dbus_data_slot_allocator_init(DBusDataSlotAllocator *allocator, DBusGlobalLock lock)
Initializes a data slot allocator object, used to assign integer IDs for data slots.
Definition dbus-dataslot.c:49
_dbus_data_slot_list_init
void _dbus_data_slot_list_init(DBusDataSlotList *list)
Initializes a slot list.
Definition dbus-dataslot.c:200
_dbus_data_slot_list_free
void _dbus_data_slot_list_free(DBusDataSlotList *list)
Frees the data slot list and all data slots contained in it, calling application-provided free functi...
Definition dbus-dataslot.c:343
_dbus_data_slot_list_get
void * _dbus_data_slot_list_get(DBusDataSlotAllocator *allocator, DBusDataSlotList *list, int slot)
Retrieves data previously set with _dbus_data_slot_list_set_data().
Definition dbus-dataslot.c:288
_dbus_data_slot_list_set
dbus_bool_t _dbus_data_slot_list_set(DBusDataSlotAllocator *allocator, DBusDataSlotList *list, int slot, void *data, DBusFreeFunction free_data_func, DBusFreeFunction *old_free_func, void **old_data)
Stores a pointer in the data slot list, along with an optional function to be used for freeing the da...
Definition dbus-dataslot.c:224
_dbus_data_slot_allocator_alloc
dbus_bool_t _dbus_data_slot_allocator_alloc(DBusDataSlotAllocator *allocator, int *slot_id_p)
Allocates an integer ID to be used for storing data in a DBusDataSlotList.
Definition dbus-dataslot.c:72
DBUS_BEGIN_DECLS
#define DBUS_BEGIN_DECLS
Macro used prior to declaring functions in the D-Bus header files.
Definition dbus-macros.h:36
DBUS_END_DECLS
#define DBUS_END_DECLS
Macro used after declaring functions in the D-Bus header files.
Definition dbus-macros.h:37
DBusFreeFunction
void(* DBusFreeFunction)(void *memory)
The type of a function which frees a block of memory.
Definition dbus-memory.h:65
dbus_int32_t
int dbus_int32_t
A 32-bit signed integer on all platforms.
Definition dbus-arch-deps.h:44
dbus_bool_t
dbus_uint32_t dbus_bool_t
A boolean, valid values are TRUE and FALSE.
Definition dbus-types.h:37
DBusAllocatedSlot
An allocated slot for storing data.
Definition dbus-dataslot.h:49
DBusAllocatedSlot::refcount
int refcount
Number of uses of the slot.
Definition dbus-dataslot.h:51
DBusAllocatedSlot::slot_id
dbus_int32_t slot_id
ID of this slot.
Definition dbus-dataslot.h:50
DBusDataSlotAllocator
An allocator that tracks a set of slot IDs.
Definition dbus-dataslot.h:58
DBusDataSlotAllocator::allocated_slots
DBusAllocatedSlot * allocated_slots
Allocated slots.
Definition dbus-dataslot.h:59
DBusDataSlotAllocator::n_allocated_slots
int n_allocated_slots
number of slots malloc'd
Definition dbus-dataslot.h:60
DBusDataSlotAllocator::lock
DBusGlobalLock lock
index of thread lock
Definition dbus-dataslot.h:62
DBusDataSlotAllocator::n_used_slots
int n_used_slots
number of slots used
Definition dbus-dataslot.h:61
DBusDataSlotList
Data structure that stores the actual user data set at a given slot.
Definition dbus-dataslot.h:72
DBusDataSlotList::n_slots
int n_slots
Slots we have storage for in data_slots.
Definition dbus-dataslot.h:74
DBusDataSlotList::slots
DBusDataSlot * slots
Data slots.
Definition dbus-dataslot.h:73
DBusDataSlot
DBusDataSlot is used to store application data on the connection.
Definition dbus-dataslot.h:39
DBusDataSlot::data
void * data
The application data.
Definition dbus-dataslot.h:40
DBusDataSlot::free_data_func
DBusFreeFunction free_data_func
Free the application data.
Definition dbus-dataslot.h:41