| 1 |
/* SPDX-License-Identifier: GPL-3.0-or-later */
|
| 2 |
/*
|
| 3 |
* memory_pool
|
| 4 |
* - memory pool
|
| 5 |
*
|
| 6 |
* Copyright (C) 2004-2026 Leaflet <leaflet@leafok.com>
|
| 7 |
*/
|
| 8 |
|
| 9 |
#ifdef HAVE_CONFIG_H
|
| 10 |
#include "config.h"
|
| 11 |
#endif
|
| 12 |
|
| 13 |
#include "log.h"
|
| 14 |
#include "memory_pool.h"
|
| 15 |
#include <stdlib.h>
|
| 16 |
#include <string.h>
|
| 17 |
|
| 18 |
MEMORY_POOL *memory_pool_init(size_t node_size, size_t node_count_per_chunk, int chunk_count_limit)
|
| 19 |
{
|
| 20 |
MEMORY_POOL *p_pool;
|
| 21 |
|
| 22 |
if (node_size < sizeof(void *))
|
| 23 |
{
|
| 24 |
log_error("Error: node_size < sizeof(void *)");
|
| 25 |
return NULL;
|
| 26 |
}
|
| 27 |
|
| 28 |
p_pool = malloc(sizeof(MEMORY_POOL));
|
| 29 |
if (p_pool == NULL)
|
| 30 |
{
|
| 31 |
log_error("malloc(MEMORY_POOL) error: OOM");
|
| 32 |
return NULL;
|
| 33 |
}
|
| 34 |
|
| 35 |
p_pool->node_size = node_size;
|
| 36 |
p_pool->node_count_per_chunk = node_count_per_chunk;
|
| 37 |
p_pool->chunk_count_limit = chunk_count_limit;
|
| 38 |
p_pool->chunk_count = 0;
|
| 39 |
p_pool->p_free = NULL;
|
| 40 |
|
| 41 |
p_pool->p_chunks = malloc(sizeof(void *) * (size_t)chunk_count_limit);
|
| 42 |
if (p_pool->p_chunks == NULL)
|
| 43 |
{
|
| 44 |
log_error("malloc(sizeof(void *) * %d) error: OOM", chunk_count_limit);
|
| 45 |
free(p_pool);
|
| 46 |
return NULL;
|
| 47 |
}
|
| 48 |
|
| 49 |
p_pool->node_count_allocated = 0;
|
| 50 |
p_pool->node_count_free = 0;
|
| 51 |
p_pool->node_count_total = 0;
|
| 52 |
|
| 53 |
return p_pool;
|
| 54 |
}
|
| 55 |
|
| 56 |
void memory_pool_cleanup(MEMORY_POOL *p_pool)
|
| 57 |
{
|
| 58 |
if (p_pool == NULL)
|
| 59 |
{
|
| 60 |
return;
|
| 61 |
}
|
| 62 |
|
| 63 |
if (p_pool->node_count_allocated > 0)
|
| 64 |
{
|
| 65 |
log_error("Still have %d in-use nodes", p_pool->node_count_allocated);
|
| 66 |
}
|
| 67 |
|
| 68 |
while (p_pool->chunk_count > 0)
|
| 69 |
{
|
| 70 |
(p_pool->chunk_count)--;
|
| 71 |
free(p_pool->p_chunks[p_pool->chunk_count]);
|
| 72 |
}
|
| 73 |
|
| 74 |
free(p_pool->p_chunks);
|
| 75 |
free(p_pool);
|
| 76 |
}
|
| 77 |
|
| 78 |
inline static void *memory_pool_add_chunk(MEMORY_POOL *p_pool)
|
| 79 |
{
|
| 80 |
void *p_chunk;
|
| 81 |
void *p_node;
|
| 82 |
size_t i;
|
| 83 |
size_t chunk_size;
|
| 84 |
|
| 85 |
if (p_pool->chunk_count >= p_pool->chunk_count_limit)
|
| 86 |
{
|
| 87 |
log_error("Chunk count limit %d reached", p_pool->chunk_count);
|
| 88 |
return NULL;
|
| 89 |
}
|
| 90 |
|
| 91 |
chunk_size = p_pool->node_size * p_pool->node_count_per_chunk;
|
| 92 |
p_chunk = malloc(chunk_size);
|
| 93 |
if (p_chunk == NULL)
|
| 94 |
{
|
| 95 |
log_error("malloc(%zu) error: OOM", chunk_size);
|
| 96 |
return NULL;
|
| 97 |
}
|
| 98 |
|
| 99 |
p_node = p_pool->p_free;
|
| 100 |
memcpy((char *)p_chunk + (p_pool->node_count_per_chunk - 1) * p_pool->node_size, &p_node, sizeof(p_node));
|
| 101 |
for (i = 0; i < p_pool->node_count_per_chunk - 1; i++)
|
| 102 |
{
|
| 103 |
p_node = (char *)p_chunk + (i + 1) * p_pool->node_size;
|
| 104 |
memcpy((char *)p_chunk + i * p_pool->node_size, &p_node, sizeof(p_node));
|
| 105 |
}
|
| 106 |
|
| 107 |
p_pool->p_chunks[p_pool->chunk_count] = p_chunk;
|
| 108 |
(p_pool->chunk_count)++;
|
| 109 |
p_pool->node_count_total += (int)p_pool->node_count_per_chunk;
|
| 110 |
p_pool->node_count_free += (int)p_pool->node_count_per_chunk;
|
| 111 |
|
| 112 |
p_pool->p_free = p_chunk;
|
| 113 |
|
| 114 |
return p_chunk;
|
| 115 |
}
|
| 116 |
|
| 117 |
void *memory_pool_alloc(MEMORY_POOL *p_pool)
|
| 118 |
{
|
| 119 |
void *p_node;
|
| 120 |
|
| 121 |
if (p_pool == NULL)
|
| 122 |
{
|
| 123 |
log_error("NULL pointer error");
|
| 124 |
return NULL;
|
| 125 |
}
|
| 126 |
|
| 127 |
if (p_pool->p_free == NULL && memory_pool_add_chunk(p_pool) == NULL)
|
| 128 |
{
|
| 129 |
log_error("Add chunk error");
|
| 130 |
return NULL;
|
| 131 |
}
|
| 132 |
|
| 133 |
p_node = p_pool->p_free;
|
| 134 |
memcpy(&(p_pool->p_free), p_node, sizeof(p_pool->p_free));
|
| 135 |
|
| 136 |
(p_pool->node_count_free)--;
|
| 137 |
(p_pool->node_count_allocated)++;
|
| 138 |
|
| 139 |
return p_node;
|
| 140 |
}
|
| 141 |
|
| 142 |
void memory_pool_free(MEMORY_POOL *p_pool, void *p_node)
|
| 143 |
{
|
| 144 |
if (p_pool == NULL)
|
| 145 |
{
|
| 146 |
log_error("NULL pointer error");
|
| 147 |
return;
|
| 148 |
}
|
| 149 |
|
| 150 |
// For test and debug
|
| 151 |
#ifdef _DEBUG
|
| 152 |
memory_pool_check_node(p_pool, p_node);
|
| 153 |
#endif
|
| 154 |
|
| 155 |
memcpy(p_node, &(p_pool->p_free), sizeof(p_pool->p_free));
|
| 156 |
p_pool->p_free = p_node;
|
| 157 |
|
| 158 |
(p_pool->node_count_free)++;
|
| 159 |
(p_pool->node_count_allocated)--;
|
| 160 |
}
|
| 161 |
|
| 162 |
int memory_pool_check_node(MEMORY_POOL *p_pool, void *p_node)
|
| 163 |
{
|
| 164 |
size_t chunk_size;
|
| 165 |
int i;
|
| 166 |
|
| 167 |
if (p_pool == NULL || p_node == NULL)
|
| 168 |
{
|
| 169 |
log_error("NULL pointer error");
|
| 170 |
return -1;
|
| 171 |
}
|
| 172 |
|
| 173 |
chunk_size = p_pool->node_size * p_pool->node_count_per_chunk;
|
| 174 |
|
| 175 |
for (i = 0; i < p_pool->chunk_count; i++)
|
| 176 |
{
|
| 177 |
if (p_node >= p_pool->p_chunks[i] && (char *)p_node < (char *)(p_pool->p_chunks[i]) + chunk_size)
|
| 178 |
{
|
| 179 |
if ((size_t)((char *)p_node - (char *)(p_pool->p_chunks[i])) % p_pool->node_size == 0)
|
| 180 |
{
|
| 181 |
return 0; // OK
|
| 182 |
}
|
| 183 |
else
|
| 184 |
{
|
| 185 |
log_error("Address of node (%p) is not aligned with border of chunk %d [%p, %p)",
|
| 186 |
p_node, i, p_pool->p_chunks[i], (char *)(p_pool->p_chunks[i]) + chunk_size);
|
| 187 |
return -3;
|
| 188 |
}
|
| 189 |
}
|
| 190 |
}
|
| 191 |
|
| 192 |
log_error("Address of node is not in range of chunks");
|
| 193 |
return -2;
|
| 194 |
}
|
Parent Directory
| 
Revision Log