aboutsummaryrefslogtreecommitdiffstats
path: root/os/rt/include/chmempools.h
blob: e1ee0d1a5f8f113a360dff8aad0e38aae38d04ba (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
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
/*
    ChibiOS - Copyright (C) 2006..2015 Giovanni Di Sirio.

    This file is part of ChibiOS.

    ChibiOS 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.

    ChibiOS 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 <http://www.gnu.org/licenses/>.
*/

/**
 * @file    chmempools.h
 * @brief   Memory Pools macros and structures.
 *
 * @addtogroup pools
 * @{
 */

#ifndef _CHMEMPOOLS_H_
#define _CHMEMPOOLS_H_

#if CH_CFG_USE_MEMPOOLS || defined(__DOXYGEN__)

/*===========================================================================*/
/* Module constants.                                                         */
/*===========================================================================*/

/*===========================================================================*/
/* Module pre-compile time settings.                                         */
/*===========================================================================*/

/*===========================================================================*/
/* Derived constants and error checks.                                       */
/*===========================================================================*/

#if !CH_CFG_USE_MEMCORE
#error "CH_CFG_USE_MEMPOOLS requires CH_CFG_USE_MEMCORE"
#endif

/*===========================================================================*/
/* Module data structures and types.                                         */
/*===========================================================================*/

/**
 * @brief   Memory pool free object header.
 */
struct pool_header {
  struct pool_header    *ph_next;       /**< @brief Pointer to the next pool
                                                    header in the list.     */
};

/**
 * @brief   Memory pool descriptor.
 */
typedef struct {
  struct pool_header    *mp_next;       /**< @brief Pointer to the header.  */
  size_t                mp_object_size; /**< @brief Memory pool objects
                                                    size.                   */
  memgetfunc_t          mp_provider;    /**< @brief Memory blocks provider
                                                    for this pool.          */
} memory_pool_t;

/*===========================================================================*/
/* Module macros.                                                            */
/*===========================================================================*/

/**
 * @brief   Data part of a static memory pool initializer.
 * @details This macro should be used when statically initializing a
 *          memory pool that is part of a bigger structure.
 *
 * @param[in] name      the name of the memory pool variable
 * @param[in] size      size of the memory pool contained objects
 * @param[in] provider  memory provider function for the memory pool
 */
#define _MEMORYPOOL_DATA(name, size, provider)                              \
  {NULL, size, provider}

/**
 * @brief Static memory pool initializer in hungry mode.
 * @details Statically initialized memory pools require no explicit
 *          initialization using @p chPoolInit().
 *
 * @param[in] name the name of the memory pool variable
 * @param[in] size size of the memory pool contained objects
 * @param[in] provider memory provider function for the memory pool or @p NULL
 *                     if the pool is not allowed to grow automatically
 */
#define MEMORYPOOL_DECL(name, size, provider)                               \
  memory_pool_t name = _MEMORYPOOL_DATA(name, size, provider)

/*===========================================================================*/
/* External declarations.                                                    */
/*===========================================================================*/

#ifdef __cplusplus
extern "C" {
#endif
  void chPoolObjectInit(memory_pool_t *mp, size_t size, memgetfunc_t provider);
  void chPoolLoadArray(memory_pool_t *mp, void *p, size_t n);
  void *chPoolAllocI(memory_pool_t *mp);
  void *chPoolAlloc(memory_pool_t *mp);
  void chPoolFreeI(memory_pool_t *mp, void *objp);
  void chPoolFree(memory_pool_t *mp, void *objp);
#ifdef __cplusplus
}
#endif

/*===========================================================================*/
/* Module inline functions.                                                  */
/*===========================================================================*/

/**
 * @brief   Adds an object to a memory pool.
 * @pre     The memory pool must be already been initialized.
 * @pre     The added object must be of the right size for the specified
 *          memory pool.
 * @pre     The added object must be memory aligned to the size of
 *          @p stkalign_t type.
 * @note    This function is just an alias for @p chPoolFree() and has been
 *          added for clarity.
 *
 * @param[in] mp        pointer to a @p memory_pool_t structure
 * @param[in] objp      the pointer to the object to be added
 *
 * @api
 */
static inline void chPoolAdd(memory_pool_t *mp, void *objp) {

  chPoolFree(mp, objp);
}

/**
 * @brief   Adds an object to a memory pool.
 * @pre     The memory pool must be already been initialized.
 * @pre     The added object must be of the right size for the specified
 *          memory pool.
 * @pre     The added object must be memory aligned to the size of
 *          @p stkalign_t type.
 * @note    This function is just an alias for @p chPoolFree() and has been
 *          added for clarity.
 *
 * @param[in] mp        pointer to a @p memory_pool_t structure
 * @param[in] objp      the pointer to the object to be added
 *
 * @iclass
 */
static inline void chPoolAddI(memory_pool_t *mp, void *objp) {

  chDbgCheckClassI();

  chPoolFreeI(mp, objp);
}

#endif /* CH_CFG_USE_MEMPOOLS */

#endif /* _CHMEMPOOLS_H_ */

/** @} */