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
|
/*
ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
2011,2012 Giovanni Di Sirio.
This file is part of ChibiOS/RT.
ChibiOS/RT 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/RT 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_USE_MEMPOOLS || defined(__DOXYGEN__)
/**
* @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. */
} MemoryPool;
/**
* @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) \
MemoryPool name = _MEMORYPOOL_DATA(name, size, provider)
/**
* @name Macro 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 MemoryPool structure
* @param[in] objp the pointer to the object to be added
*
* @api
*/
#define chPoolAdd(mp, 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 MemoryPool structure
* @param[in] objp the pointer to the object to be added
*
* @iclass
*/
#define chPoolAddI(mp, objp) chPoolFreeI(mp, objp)
/** @} */
#ifdef __cplusplus
extern "C" {
#endif
void chPoolInit(MemoryPool *mp, size_t size, memgetfunc_t provider);
void chPoolLoadArray(MemoryPool *mp, void *p, size_t n);
void *chPoolAllocI(MemoryPool *mp);
void *chPoolAlloc(MemoryPool *mp);
void chPoolFreeI(MemoryPool *mp, void *objp);
void chPoolFree(MemoryPool *mp, void *objp);
#ifdef __cplusplus
}
#endif
#endif /* CH_USE_MEMPOOLS */
#endif /* _CHMEMPOOLS_H_ */
/** @} */
|
