blob: 797bfcfc4a285350a4751f7768a87892186461af (
plain)
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
|
/*
* Cogl
*
* An object oriented GL/GLES Abstraction/Utility Layer
*
* Copyright (C) 2012 Intel Corporation.
*
* 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 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/>.
*
*
*
* CoglMagazine provides a really light weight allocator for chunks
* of memory with a pre-determined size.
*
* This allocator builds on CoglMemoryStack for making all initial
* allocations but never frees memory back to the stack.
*
* Memory chunks that haven't been allocated yet are stored in a
* singly linked, fifo, list.
*
* Allocating from a magazine is simply a question of popping an entry
* from the head of the fifo list. If no entries are available then
* instead allocate from the memory stack instead.
*
* When an entry is freed, it is put back into the fifo list for
* re-use.
*
* No attempt is ever made to shrink the amount of memory associated
* with a CoglMagazine.
*
*
* Authors:
* Robert Bragg <robert@linux.intel.com>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "cogl-memory-stack-private.h"
#include "cogl-magazine-private.h"
#include <glib.h>
#define ROUND_UP_8(X) ((X + (8 - 1)) & ~(8 - 1))
CoglMagazine *
_cogl_magazine_new (size_t chunk_size, int initial_chunk_count)
{
CoglMagazine *magazine = g_new0 (CoglMagazine, 1);
chunk_size = MAX (chunk_size, sizeof (CoglMagazineChunk));
chunk_size = ROUND_UP_8 (chunk_size);
magazine->chunk_size = chunk_size;
magazine->stack = _cogl_memory_stack_new (chunk_size * initial_chunk_count);
magazine->head = NULL;
return magazine;
}
void
_cogl_magazine_free (CoglMagazine *magazine)
{
_cogl_memory_stack_free (magazine->stack);
g_free (magazine);
}
|
