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
|
/* Copyright (C) CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
/*!
* \brief Memory allocation related functions.
*/
#pragma once
#include <libknot/mm_ctx.h>
#include "contrib/ucw/mempool.h"
#include "lib/defines.h"
#include <assert.h>
#include <stdint.h>
/*! \brief Default memory block size. */
#define MM_DEFAULT_BLKSIZE 4096
/*! \brief Allocs using 'mm' if any, uses system malloc() otherwise. */
KR_EXPORT
void *mm_alloc(knot_mm_t *mm, size_t size);
/*! \brief Callocs using 'mm' if any, uses system calloc() otherwise. */
void *mm_calloc(knot_mm_t *mm, size_t nmemb, size_t size);
/*! \brief Reallocs using 'mm' if any, uses system realloc() otherwise. */
KR_EXPORT
void *mm_realloc(knot_mm_t *mm, void *what, size_t size, size_t prev_size);
/*! \brief Strdups using 'mm' if any, uses system strdup() otherwise. */
char *mm_strdup(knot_mm_t *mm, const char *s);
/*! \brief Free using 'mm' if any, uses system free() otherwise. */
KR_EXPORT
void mm_free(knot_mm_t *mm, void *what);
/*! \brief Initialize default memory allocation context. */
void mm_ctx_init(knot_mm_t *mm);
/*! \brief Memory pool context. */
void mm_ctx_mempool(knot_mm_t *mm, size_t chunk_size);
/* API in addition to Knot's mempattern. */
/*! \brief New memory pool context, allocated on itself. */
KR_EXPORT knot_mm_t * mm_ctx_mempool2(size_t chunk_size);
/*! \brief Delete a memory pool. OK to call on a non-pool. */
static inline void mm_ctx_delete(knot_mm_t *mm)
{
/* The mp_alloc comparison bears a risk of missing the private symbol from knot. */
if (mm && mm->ctx && mm->alloc == (knot_mm_alloc_t)mp_alloc)
mp_delete(mm->ctx);
}
/*! \brief Readability: avoid const-casts in code. */
static inline void free_const(const void *what)
{
free((void *)what);
}
/*! \brief posix_memalign() wrapper. */
void *mm_malloc_aligned(void *ctx, size_t n);
/*! \brief Initialize mm with malloc+free with specified alignment (a power of two). */
static inline void mm_ctx_init_aligned(knot_mm_t *mm, size_t alignment)
{
assert(__builtin_popcount(alignment) == 1);
mm_ctx_init(mm);
mm->ctx = (uint8_t *)NULL + alignment; /*< roundabout to satisfy linters */
/* posix_memalign() doesn't allow alignment < sizeof(void*),
* and there's no point in using it for small values anyway,
* as plain malloc() guarantees at least max_align_t. */
if (alignment > sizeof(max_align_t)) {
mm->alloc = mm_malloc_aligned;
}
}
|
