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
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
|
/* EINA - EFL data type library
* Copyright (C) 2002-2008 Carsten Haitzler,
* Jorge Luis Zapata Muga,
* Cedric Bail,
* Gustavo Sverzut Barbieri
* Tom Hacohen
*
* 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, see <http://www.gnu.org/licenses/>.
*/
/**
* @page tutorial_binshare_page Binary Share Tutorial
*
* Should call eina_binshare_init() before usage and eina_binshare_shutdown() after.
* to be written...
*
*/
#include "eina_share_common.h"
#include "eina_unicode.h"
#include "eina_private.h"
#include "eina_binshare.h"
/* The actual share */
static Eina_Share *binshare_share;
static const char EINA_MAGIC_BINSHARE_NODE_STR[] = "Eina Binshare Node";
/*============================================================================*
* Global *
*============================================================================*/
/**
* @internal
* @brief Initialize the share_common module.
*
* @return #EINA_TRUE on success, #EINA_FALSE on failure.
*
* This function sets up the share_common module of Eina. It is called by
* eina_init().
*
* @see eina_init()
*/
EAPI Eina_Bool eina_binshare_init(void)
{
return eina_share_common_init(&binshare_share,
EINA_MAGIC_BINSHARE_NODE,
EINA_MAGIC_BINSHARE_NODE_STR);
}
/**
* @internal
* @brief Shut down the share_common module.
*
* @return #EINA_TRUE on success, #EINA_FALSE on failure.
*
* This function shuts down the share_common module set up by
* eina_share_common_init(). It is called by eina_shutdown().
*
* @see eina_shutdown()
*/
EAPI Eina_Bool eina_binshare_shutdown(void)
{
Eina_Bool ret;
ret = eina_share_common_shutdown(&binshare_share);
return ret;
}
/*============================================================================*
* API *
*============================================================================*/
/**
* @addtogroup Eina_Binshare_Group Binary Share
*
* These functions allow you to store one copy of an object, and use it
* throughout your program.
*
* This is a method to reduce the number of duplicated objects kept in
* memory.
*
* For more information, you can look at the @ref tutorial_binshare_page.
*
* @{
*/
/**
* @brief Note that the given object has lost an instance.
*
* @param obj object The given object.
*
* This function decreases the reference counter associated to @p obj
* if it exists. If that counter reaches 0, the memory associated to
* @p obj is freed. If @p obj is NULL, the function returns
* immediately.
*
* Note that if the given pointer is not shared or NULL, bad things
* will happen, likely a segmentation fault.
*/
EAPI void eina_binshare_del(const void *obj)
{
if (!obj)
return;
eina_share_common_del(binshare_share, obj);
}
/**
* @brief Retrieve an instance of an object for use in a program.
*
* @param obj The binary object to retrieve an instance of.
* @param olen The byte size
* @return A pointer to an instance of the object on success.
* @c NULL on failure.
*
* This function retrieves an instance of @p obj. If @p obj is
* @c NULL, then @c NULL is returned. If @p obj is already stored, it
* is just returned and its reference counter is increased. Otherwise
* it is added to the objects to be searched and a duplicated object
* of @p obj is returned.
*
* This function does not check object size, but uses the
* exact given size. This can be used to share part of a larger
* object or subobject.
*
* @see eina_binshare_add()
*/
EAPI const void *eina_binshare_add_length(const void *obj,
unsigned int olen)
{
return eina_share_common_add_length(binshare_share,
obj, (olen) * sizeof(char), 0);
}
/**
* Increment references of the given shared object.
*
* @param obj The shared object.
* @return A pointer to an instance of the object on success.
* @c NULL on failure.
*
* This is similar to eina_share_common_add(), but it's faster since it will
* avoid lookups if possible, but on the down side it requires the parameter
* to be shared before, in other words, it must be the return of a previous
* eina_binshare_add().
*
* There is no unref since this is the work of eina_binshare_del().
*/
EAPI const void *eina_binshare_ref(const void *obj)
{
return eina_share_common_ref(binshare_share, obj);
}
/**
* @brief Note that the given object @b must be shared.
*
* @param obj the shared object to know the length. It is safe to
* give NULL, in that case -1 is returned.
*
* This function is a cheap way to known the length of a shared
* object. Note that if the given pointer is not shared, bad
* things will happen, likely a segmentation fault. If in doubt, try
* strlen().
*/
EAPI int eina_binshare_length(const void *obj)
{
return eina_share_common_length(binshare_share, obj);
}
/**
* @brief Dump the contents of the share_common.
*
* This function dumps all objects in the share_common to stdout with a
* DDD: prefix per line and a memory usage summary.
*/
EAPI void eina_binshare_dump(void)
{
eina_share_common_dump(binshare_share, NULL, 0);
}
/**
* @}
*/
|
