1 | /* grcboxprivate.h: Reference counted data |
2 | * |
3 | * Copyright 2018 Emmanuele Bassi |
4 | * |
5 | * This library is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU Lesser General Public |
7 | * License as published by the Free Software Foundation; either |
8 | * version 2.1 of the License, or (at your option) any later version. |
9 | * |
10 | * This library is distributed in the hope that it will be useful, |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | * Lesser General Public License for more details. |
14 | * |
15 | * You should have received a copy of the GNU Lesser General Public |
16 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. |
17 | */ |
18 | |
19 | #pragma once |
20 | |
21 | #include "gtypes.h" |
22 | #include "grcbox.h" |
23 | |
24 | G_BEGIN_DECLS |
25 | |
26 | typedef struct { |
27 | grefcount ref_count; |
28 | |
29 | gsize mem_size; |
30 | gsize private_offset; |
31 | |
32 | #ifndef G_DISABLE_ASSERT |
33 | /* A "magic" number, used to perform additional integrity |
34 | * checks on the allocated data |
35 | */ |
36 | guint32 magic; |
37 | #endif |
38 | } GRcBox; |
39 | |
40 | typedef struct { |
41 | gatomicrefcount ref_count; |
42 | |
43 | gsize mem_size; |
44 | gsize private_offset; |
45 | |
46 | #ifndef G_DISABLE_ASSERT |
47 | guint32 magic; |
48 | #endif |
49 | } GArcBox; |
50 | |
51 | #define G_BOX_MAGIC 0x44ae2bf0 |
52 | |
53 | /* Keep the two refcounted boxes identical in size */ |
54 | G_STATIC_ASSERT (sizeof (GRcBox) == sizeof (GArcBox)); |
55 | |
56 | /* This is the default alignment we use when allocating the |
57 | * refcounted memory blocks; it's similar to the alignment |
58 | * guaranteed by the malloc() in GNU's libc and by the GSlice |
59 | * allocator |
60 | */ |
61 | #define STRUCT_ALIGNMENT (2 * sizeof (gsize)) |
62 | |
63 | #define G_RC_BOX_SIZE sizeof (GRcBox) |
64 | #define G_ARC_BOX_SIZE sizeof (GArcBox) |
65 | |
66 | gpointer g_rc_box_alloc_full (gsize block_size, |
67 | gsize alignment, |
68 | gboolean atomic, |
69 | gboolean clear); |
70 | |
71 | G_END_DECLS |
72 | |