D-Bus 1.13.18

dbus-hash.h
1 /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
2 /* dbus-hash.h Generic hash table utility (internal to D-Bus implementation)
3 *
4 * Copyright (C) 2002 Red Hat, Inc.
5 *
6 * Licensed under the Academic Free License version 2.1
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 *
22 */
23
24 #ifndef DBUS_HASH_H
25 #define DBUS_HASH_H
26
27 #ifdef HAVE_STDINT_H
28 #include <stdint.h>
29 #endif
30
31 #ifdef HAVE_INTTYPES_H
32 #include <inttypes.h>
33 #endif
34
35 #include <dbus/dbus-memory.h>
36 #include <dbus/dbus-types.h>
37 #include <dbus/dbus-sysdeps.h>
38
39 DBUS_BEGIN_DECLS
40
49 struct DBusHashIter
50 {
51 void *dummy1;
52 void *dummy2;
53 void *dummy3;
54 void *dummy4;
55 int dummy5;
56 int dummy6;
57 };
58
59 typedef struct DBusHashTable DBusHashTable;
60 typedef struct DBusHashIter DBusHashIter;
61
62 /* Allowing an arbitrary function as with GLib
63 * would be nicer for a public API, but for
64 * an internal API this saves typing, we can add
65 * more whenever we feel like it.
66 */
67 typedef enum
68 {
69 DBUS_HASH_STRING,
70 DBUS_HASH_INT,
71 DBUS_HASH_UINTPTR
72 } DBusHashType;
73
74 DBUS_PRIVATE_EXPORT
75 DBusHashTable* _dbus_hash_table_new (DBusHashType type,
76 DBusFreeFunction key_free_function,
77 DBusFreeFunction value_free_function);
78 DBUS_PRIVATE_EXPORT
79 DBusHashTable* _dbus_hash_table_ref (DBusHashTable *table);
80 DBUS_PRIVATE_EXPORT
81 void _dbus_hash_table_unref (DBusHashTable *table);
82 void _dbus_hash_table_remove_all (DBusHashTable *table);
83 DBUS_PRIVATE_EXPORT
84 void _dbus_hash_iter_init (DBusHashTable *table,
85 DBusHashIter *iter);
86 DBUS_PRIVATE_EXPORT
87 dbus_bool_t _dbus_hash_iter_next (DBusHashIter *iter);
88 DBUS_PRIVATE_EXPORT
89 void _dbus_hash_iter_remove_entry (DBusHashIter *iter);
90 DBUS_PRIVATE_EXPORT
91 void* _dbus_hash_iter_get_value (DBusHashIter *iter);
92 DBUS_PRIVATE_EXPORT
93 void _dbus_hash_iter_set_value (DBusHashIter *iter,
94 void *value);
95 DBUS_PRIVATE_EXPORT
96 int _dbus_hash_iter_get_int_key (DBusHashIter *iter);
97 DBUS_PRIVATE_EXPORT
98 const char* _dbus_hash_iter_get_string_key (DBusHashIter *iter);
99 DBUS_PRIVATE_EXPORT
100 uintptr_t _dbus_hash_iter_get_uintptr_key (DBusHashIter *iter);
101 DBUS_PRIVATE_EXPORT
102 dbus_bool_t _dbus_hash_iter_lookup (DBusHashTable *table,
103 void *key,
104 dbus_bool_t create_if_not_found,
105 DBusHashIter *iter);
106 DBUS_PRIVATE_EXPORT
107 void* _dbus_hash_table_lookup_string (DBusHashTable *table,
108 const char *key);
109 DBUS_PRIVATE_EXPORT
110 void* _dbus_hash_table_lookup_int (DBusHashTable *table,
111 int key);
112 DBUS_PRIVATE_EXPORT
113 void* _dbus_hash_table_lookup_uintptr (DBusHashTable *table,
114 uintptr_t key);
115 DBUS_PRIVATE_EXPORT
116 dbus_bool_t _dbus_hash_table_remove_string (DBusHashTable *table,
117 const char *key);
118 DBUS_PRIVATE_EXPORT
119 dbus_bool_t _dbus_hash_table_remove_int (DBusHashTable *table,
120 int key);
121 DBUS_PRIVATE_EXPORT
122 dbus_bool_t _dbus_hash_table_remove_uintptr (DBusHashTable *table,
123 uintptr_t key);
124 DBUS_PRIVATE_EXPORT
125 dbus_bool_t _dbus_hash_table_insert_string (DBusHashTable *table,
126 char *key,
127 void *value);
128 DBUS_PRIVATE_EXPORT
129 dbus_bool_t _dbus_hash_table_insert_int (DBusHashTable *table,
130 int key,
131 void *value);
132 DBUS_PRIVATE_EXPORT
133 dbus_bool_t _dbus_hash_table_insert_uintptr (DBusHashTable *table,
134 uintptr_t key,
135 void *value);
136 DBUS_PRIVATE_EXPORT
137 int _dbus_hash_table_get_n_entries (DBusHashTable *table);
138
139 DBUS_PRIVATE_EXPORT
140 char ** _dbus_hash_table_to_array (DBusHashTable *table,
141 char delimiter);
142 DBUS_PRIVATE_EXPORT
143 dbus_bool_t _dbus_hash_table_from_array (DBusHashTable *table,
144 char **array,
145 char delimiter);
146
147 /* Preallocation */
148
150 typedef struct DBusPreallocatedHash DBusPreallocatedHash;
151
152 DBUS_PRIVATE_EXPORT
153 DBusPreallocatedHash *_dbus_hash_table_preallocate_entry (DBusHashTable *table);
154 DBUS_PRIVATE_EXPORT
155 void _dbus_hash_table_free_preallocated_entry (DBusHashTable *table,
156 DBusPreallocatedHash *preallocated);
157 DBUS_PRIVATE_EXPORT
158 void _dbus_hash_table_insert_string_preallocated (DBusHashTable *table,
159 DBusPreallocatedHash *preallocated,
160 char *key,
161 void *value);
162
163 #ifdef DBUS_WIN
164 # define DBUS_HASH_POLLABLE DBUS_HASH_UINTPTR
165 #else
166 # define DBUS_HASH_POLLABLE DBUS_HASH_INT
167 #endif
168
169 static inline DBusPollable
170 _dbus_hash_iter_get_pollable_key (DBusHashIter *iter)
171 {
172 #ifdef DBUS_WIN
173 DBusSocket s;
174
175 s.sock = _dbus_hash_iter_get_uintptr_key (iter);
176 return s;
177 #else
178 return _dbus_hash_iter_get_int_key (iter);
179 #endif
180 }
181
182 static inline void *
183 _dbus_hash_table_lookup_pollable (DBusHashTable *table,
184 DBusPollable key)
185 {
186 #ifdef DBUS_WIN
187 return _dbus_hash_table_lookup_uintptr (table, key.sock);
188 #else
189 return _dbus_hash_table_lookup_int (table, key);
190 #endif
191 }
192
193 static inline dbus_bool_t
194 _dbus_hash_table_remove_pollable (DBusHashTable *table,
195 DBusPollable key)
196 {
197 #ifdef DBUS_WIN
198 return _dbus_hash_table_remove_uintptr (table, key.sock);
199 #else
200 return _dbus_hash_table_remove_int (table, key);
201 #endif
202 }
203
204 static inline dbus_bool_t
205 _dbus_hash_table_insert_pollable (DBusHashTable *table,
206 DBusPollable key,
207 void *value)
208 {
209 #ifdef DBUS_WIN
210 return _dbus_hash_table_insert_uintptr (table, key.sock, value);
211 #else
212 return _dbus_hash_table_insert_int (table, key, value);
213 #endif
214 }
215
216 static inline void
217 _dbus_clear_hash_table (DBusHashTable **table_p)
218 {
219 _dbus_clear_pointer_impl (DBusHashTable, table_p, _dbus_hash_table_unref);
220 }
221
224 DBUS_END_DECLS
225
226 #endif /* DBUS_HASH_H */
_dbus_hash_table_get_n_entries
int _dbus_hash_table_get_n_entries(DBusHashTable *table)
Gets the number of hash entries in a hash table.
Definition: dbus-hash.c:1460
DBusHashIter::dummy5
int dummy5
Do not use.
Definition: dbus-hash.h:55
_dbus_hash_table_insert_uintptr
dbus_bool_t _dbus_hash_table_insert_uintptr(DBusHashTable *table, uintptr_t key, void *value)
Creates a hash entry with the given key and value.
Definition: dbus-hash.c:1352
_dbus_hash_table_to_array
char ** _dbus_hash_table_to_array(DBusHashTable *table, char delimiter)
Creates a string array from a hash table.
Definition: dbus-hash.c:1543
_dbus_hash_table_unref
void _dbus_hash_table_unref(DBusHashTable *table)
Decrements the reference count for a hash table, freeing the hash table if the count reaches zero.
Definition: dbus-hash.c:367
_dbus_hash_table_remove_int
dbus_bool_t _dbus_hash_table_remove_int(DBusHashTable *table, int key)
Removes the hash entry for the given key.
Definition: dbus-hash.c:1214
_dbus_hash_table_lookup_string
void * _dbus_hash_table_lookup_string(DBusHashTable *table, const char *key)
Looks up the value for a given string in a hash table of type DBUS_HASH_STRING.
Definition: dbus-hash.c:1112
_dbus_hash_table_lookup_int
void * _dbus_hash_table_lookup_int(DBusHashTable *table, int key)
Looks up the value for a given integer in a hash table of type DBUS_HASH_INT.
Definition: dbus-hash.c:1137
DBUS_HASH_INT
@ DBUS_HASH_INT
Hash keys are integers.
Definition: dbus-hash.h:70
_dbus_hash_table_free_preallocated_entry
void _dbus_hash_table_free_preallocated_entry(DBusHashTable *table, DBusPreallocatedHash *preallocated)
Frees an opaque DBusPreallocatedHash that was not used in order to insert into the hash table.
Definition: dbus-hash.c:1402
DBusFreeFunction
void(* DBusFreeFunction)(void *memory)
Definition: dbus-memory.h:63
_dbus_hash_iter_get_uintptr_key
uintptr_t _dbus_hash_iter_get_uintptr_key(DBusHashIter *iter)
Gets the key for the current entry.
Definition: dbus-hash.c:684
_dbus_hash_table_preallocate_entry
DBusPreallocatedHash * _dbus_hash_table_preallocate_entry(DBusHashTable *table)
Preallocate an opaque data blob that allows us to insert into the hash table at a later time without ...
Definition: dbus-hash.c:1385
DBUS_END_DECLS
#define DBUS_END_DECLS
_dbus_hash_iter_remove_entry
void _dbus_hash_iter_remove_entry(DBusHashIter *iter)
Removes the current entry from the hash table.
Definition: dbus-hash.c:598
_dbus_hash_table_new
DBusHashTable * _dbus_hash_table_new(DBusHashType type, DBusFreeFunction key_free_function, DBusFreeFunction value_free_function)
Constructs a new hash table.
Definition: dbus-hash.c:291
DBusHashIter::dummy4
void * dummy4
Do not use.
Definition: dbus-hash.h:54
DBusHashIter
Hash iterator object.
Definition: dbus-hash.h:50
DBUS_HASH_STRING
@ DBUS_HASH_STRING
Hash keys are strings.
Definition: dbus-hash.h:69
_dbus_hash_iter_set_value
void _dbus_hash_iter_set_value(DBusHashIter *iter, void *value)
Sets the value of the current entry.
Definition: dbus-hash.c:642
DBUS_BEGIN_DECLS
#define DBUS_BEGIN_DECLS
DBusHashIter::dummy6
int dummy6
Do not use.
Definition: dbus-hash.h:56
_dbus_hash_iter_next
dbus_bool_t _dbus_hash_iter_next(DBusHashIter *iter)
Move the hash iterator forward one step, to the next hash entry.
Definition: dbus-hash.c:549
DBusHashType
DBusHashType
Definition: dbus-hash.h:68
_dbus_hash_table_insert_int
dbus_bool_t _dbus_hash_table_insert_int(DBusHashTable *table, int key, void *value)
Creates a hash entry with the given key and value.
Definition: dbus-hash.c:1311
_dbus_hash_iter_lookup
dbus_bool_t _dbus_hash_iter_lookup(DBusHashTable *table, void *key, dbus_bool_t create_if_not_found, DBusHashIter *iter)
A low-level but efficient interface for manipulating the hash table.
Definition: dbus-hash.c:747
_dbus_hash_iter_get_string_key
const char * _dbus_hash_iter_get_string_key(DBusHashIter *iter)
Gets the key for the current entry.
Definition: dbus-hash.c:702
DBusSocket
Socket interface.
Definition: dbus-sysdeps.h:181
_dbus_hash_iter_get_int_key
int _dbus_hash_iter_get_int_key(DBusHashIter *iter)
Gets the key for the current entry.
Definition: dbus-hash.c:665
_dbus_hash_table_remove_all
void _dbus_hash_table_remove_all(DBusHashTable *table)
Removed all entries from a hash table.
Definition: dbus-hash.c:424
_dbus_hash_table_lookup_uintptr
void * _dbus_hash_table_lookup_uintptr(DBusHashTable *table, uintptr_t key)
Looks up the value for a given integer in a hash table of type DBUS_HASH_UINTPTR.
Definition: dbus-hash.c:1162
DBUS_HASH_UINTPTR
@ DBUS_HASH_UINTPTR
Hash keys are integer capable to hold a pointer.
Definition: dbus-hash.h:71
DBusHashIter::dummy3
void * dummy3
Do not use.
Definition: dbus-hash.h:53
DBusHashTable
Internals of DBusHashTable.
Definition: dbus-hash.c:174
_dbus_hash_table_from_array
dbus_bool_t _dbus_hash_table_from_array(DBusHashTable *table, char **array, char delimiter)
Imports a string array into a hash table The hash table needs to be initialized with string keys,...
Definition: dbus-hash.c:1478
_dbus_hash_iter_get_value
void * _dbus_hash_iter_get_value(DBusHashIter *iter)
Gets the value of the current entry.
Definition: dbus-hash.c:619
_dbus_hash_table_remove_uintptr
dbus_bool_t _dbus_hash_table_remove_uintptr(DBusHashTable *table, uintptr_t key)
Removes the hash entry for the given key.
Definition: dbus-hash.c:1242
_dbus_hash_table_insert_string_preallocated
void _dbus_hash_table_insert_string_preallocated(DBusHashTable *table, DBusPreallocatedHash *preallocated, char *key, void *value)
Inserts a string-keyed entry into the hash table, using a preallocated data block from _dbus_hash_tab...
Definition: dbus-hash.c:1429
_dbus_hash_table_ref
DBusHashTable * _dbus_hash_table_ref(DBusHashTable *table)
Increments the reference count for a hash table.
Definition: dbus-hash.c:353
DBusPreallocatedHash
struct DBusPreallocatedHash DBusPreallocatedHash
A preallocated hash entry.
Definition: dbus-hash.h:150
_dbus_hash_iter_init
void _dbus_hash_iter_init(DBusHashTable *table, DBusHashIter *iter)
Initializes a hash table iterator.
Definition: dbus-hash.c:523
_dbus_hash_table_insert_string
dbus_bool_t _dbus_hash_table_insert_string(DBusHashTable *table, char *key, void *value)
Creates a hash entry with the given key and value.
Definition: dbus-hash.c:1277
DBusHashIter::dummy1
void * dummy1
Do not use.
Definition: dbus-hash.h:51
DBusHashIter::dummy2
void * dummy2
Do not use.
Definition: dbus-hash.h:52
_dbus_hash_table_remove_string
dbus_bool_t _dbus_hash_table_remove_string(DBusHashTable *table, const char *key)
Removes the hash entry for the given key.
Definition: dbus-hash.c:1186
dbus_bool_t
dbus_uint32_t dbus_bool_t
Definition: dbus-types.h:35