git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@408 35acf78f-673a-0410-8e92-d51de3d6d3f4
This commit is contained in:
gdisirio
parent
ac6b3caba1
commit
d9d134c7ad
|
|
@ -139,11 +139,11 @@
|
|||
|
||||
/** Configuration option: if specified then the memory pools allocator APIs
|
||||
* are included in the kernel.*/
|
||||
#define CH_USE_MEMPOOLS
|
||||
//#define CH_USE_MEMPOOLS
|
||||
|
||||
/** Configuration option: if specified then the memory pools allocator
|
||||
provides an implementation of the sbrk() function.*/
|
||||
#define CH_MEMPOOLS_PROVIDE_SBRK
|
||||
//#define CH_MEMPOOLS_PROVIDE_SBRK
|
||||
|
||||
/** Configuration option: Frequency of the system timer that drives the system
|
||||
* ticks. This also defines the system time unit.*/
|
||||
|
|
|
|||
|
|
@ -139,11 +139,11 @@
|
|||
|
||||
/** Configuration option: if specified then the memory pools allocator APIs
|
||||
* are included in the kernel.*/
|
||||
#define CH_USE_MEMPOOLS
|
||||
//#define CH_USE_MEMPOOLS
|
||||
|
||||
/** Configuration option: if specified then the memory pools allocator
|
||||
provides an implementation of the sbrk() function.*/
|
||||
#define CH_MEMPOOLS_PROVIDE_SBRK
|
||||
//#define CH_MEMPOOLS_PROVIDE_SBRK
|
||||
|
||||
/** Configuration option: Frequency of the system timer that drives the system
|
||||
* ticks. This also defines the system time unit.*/
|
||||
|
|
|
|||
|
|
@ -140,11 +140,11 @@
|
|||
|
||||
/** Configuration option: if specified then the memory pools allocator APIs
|
||||
* are included in the kernel.*/
|
||||
#define CH_USE_MEMPOOLS
|
||||
//#define CH_USE_MEMPOOLS
|
||||
|
||||
/** Configuration option: if specified then the memory pools allocator
|
||||
provides an implementation of the sbrk() function.*/
|
||||
#define CH_MEMPOOLS_PROVIDE_SBRK
|
||||
//#define CH_MEMPOOLS_PROVIDE_SBRK
|
||||
|
||||
/** Configuration option: Frequency of the system timer that drives the system
|
||||
* ticks. This also defines the system time unit.*/
|
||||
|
|
|
|||
|
|
@ -0,0 +1,121 @@
|
|||
/*
|
||||
ChibiOS/RT - Copyright (C) 2006-2007 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/>.
|
||||
*/
|
||||
|
||||
/**
|
||||
* @addtogroup MemoryPools
|
||||
* @{
|
||||
*/
|
||||
|
||||
#include <ch.h>
|
||||
|
||||
#ifdef CH_USE_MEMPOOLS
|
||||
|
||||
#ifndef CH_MEMPOOLS_PROVIDE_SBRK
|
||||
#include <unistd.h>
|
||||
#else
|
||||
/*
|
||||
* Optional internal sbrk() implementation, this code requires the linker to
|
||||
* provide two symbols: __heap_base__ and __heap_end__ that are the boundaries
|
||||
* of the free RAM space.
|
||||
*/
|
||||
extern char __heap_base__;
|
||||
extern char __heap_end__;
|
||||
static char *current = &__heap_base__;
|
||||
|
||||
void *sbrk(ptrdiff_t increment) {
|
||||
char *cp;
|
||||
|
||||
if (current + increment >= &__heap_end__)
|
||||
return (void *)-1;
|
||||
cp = current;
|
||||
current += increment;
|
||||
return cp;
|
||||
}
|
||||
#endif /* CH_MEMPOOLS_PROVIDE_SBRK */
|
||||
|
||||
/**
|
||||
* Initializes a memory pool.
|
||||
* @param mp pointer to a \p MemoryPool structure
|
||||
* @param size the size of the objects contained in this memory pool
|
||||
*/
|
||||
void chPoolInit(MemoryPool *mp, size_t size) {
|
||||
|
||||
chDbgAssert((mp != NULL) && (size >= sizeof(void *)),
|
||||
"chpools.c, chPoolFree()");
|
||||
|
||||
mp->mp_next = NULL;
|
||||
mp->mp_object_size = size;
|
||||
}
|
||||
|
||||
/**
|
||||
* Allocates an object from a memory pool.
|
||||
* @param mp pointer to a \p MemoryPool structure
|
||||
* @param allow_growth if \p TRUE then the object is allocated by using
|
||||
* \p sbrk() in case the memory pool is empty
|
||||
* @return the pointer to the allocated object or \p NULL if the memory is
|
||||
* exhausted
|
||||
*/
|
||||
void *chPoolAlloc(MemoryPool *mp, bool_t allow_growth) {
|
||||
void *p;
|
||||
|
||||
chDbgAssert(mp != NULL, "chpools.c, chPoolAlloc()");
|
||||
|
||||
chSysLock();
|
||||
|
||||
if (mp->mp_next == NULL) {
|
||||
if (allow_growth) {
|
||||
p = sbrk(mp->mp_object_size);
|
||||
|
||||
chSysUnlock();
|
||||
if (p != (void *)-1)
|
||||
return p;
|
||||
}
|
||||
return NULL;
|
||||
}
|
||||
p = mp->mp_next;
|
||||
mp->mp_next = mp->mp_next->ph_next;
|
||||
|
||||
chSysUnlock();
|
||||
return p;
|
||||
}
|
||||
|
||||
/**
|
||||
* Releases (or adds) an object to a memory pool.
|
||||
* @param mp pointer to a \p MemoryPool structure
|
||||
* @param objp the pointer to the object to be released or added
|
||||
* @note the object is assumed to be of the right size for the specified
|
||||
* buffer.
|
||||
*/
|
||||
void chPoolFree(MemoryPool *mp, void *objp) {
|
||||
struct pool_header *php = objp;
|
||||
|
||||
chDbgAssert((mp != NULL) && (objp != NULL),
|
||||
"chpools.c, chPoolFree()");
|
||||
|
||||
chSysLock();
|
||||
|
||||
php->ph_next = mp->mp_next;
|
||||
mp->mp_next = php;
|
||||
|
||||
chSysUnlock();
|
||||
}
|
||||
|
||||
#endif /* CH_USE_MEMPOOLS */
|
||||
|
||||
/** @} */
|
||||
|
|
@ -42,7 +42,7 @@
|
|||
#include "sleep.h"
|
||||
#include "queues.h"
|
||||
#include "serial.h"
|
||||
#include "pools.h"
|
||||
#include "mempools.h"
|
||||
#include "debug.h"
|
||||
|
||||
/*
|
||||
|
|
|
|||
|
|
@ -0,0 +1,53 @@
|
|||
/*
|
||||
ChibiOS/RT - Copyright (C) 2006-2007 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/>.
|
||||
*/
|
||||
|
||||
/**
|
||||
* @addtogroup MemoryPools
|
||||
* @{
|
||||
*/
|
||||
|
||||
#ifndef _MEMPOOLS_H_
|
||||
#define _MEMPOOLS_H_
|
||||
|
||||
#ifdef CH_USE_MEMPOOLS
|
||||
|
||||
struct pool_header {
|
||||
struct pool_header *ph_next;
|
||||
};
|
||||
|
||||
typedef struct {
|
||||
struct pool_header *mp_next;
|
||||
size_t mp_object_size;
|
||||
} MemoryPool;
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif
|
||||
void chPoolInit(MemoryPool *mp, size_t size);
|
||||
void *chPoolAlloc(MemoryPool *mp, bool_t grow);
|
||||
void chPoolFree(MemoryPool *mp, void *objp);
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif /* CH_USE_MEMPOOLS */
|
||||
|
||||
#endif /* _MEMPOOLS_H_ */
|
||||
|
||||
/** @} */
|
||||
Loading…
Reference in New Issue