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/*
ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010 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 chheap.h
* @brief Heaps macros and structures.
*
* @addtogroup heaps
* @{
*/
#ifndef _CHHEAP_H_
#define _CHHEAP_H_
#if CH_USE_HEAP
/*
* Module dependencies check.
*/
#if !CH_USE_MEMCORE && !CH_USE_MALLOC_HEAP
#error "CH_USE_HEAP requires CH_USE_MEMCORE or CH_USE_MALLOC_HEAP"
#endif
#if !CH_USE_MUTEXES && !CH_USE_SEMAPHORES
#error "CH_USE_HEAP requires CH_USE_MUTEXES and/or CH_USE_SEMAPHORES"
#endif
typedef struct memory_heap MemoryHeap;
/**
* @brief Memory heap block header.
*/
union heap_header {
stkalign_t align;
struct {
union {
union heap_header *next; /**< @brief Next block in free list. */
MemoryHeap *heap; /**< @brief Block owner heap. */
} u; /**< @brief Overlapped fields. */
size_t size; /**< @brief Size of the memory block. */
} h;
};
/**
* @brief Structure describing a memory heap.
*/
struct memory_heap {
memgetfunc_t h_provider; /**< @brief Memory blocks provider for
this heap. */
union heap_header h_free; /**< @brief Free blocks list header. */
#if CH_USE_MUTEXES
Mutex h_mtx; /**< @brief Heap access mutex. */
#else
Semaphore h_sem; /**< @brief Heap access semaphore. */
#endif
};
#ifdef __cplusplus
extern "C" {
#endif
void heap_init(void);
void chHeapInit(MemoryHeap *heapp, void *buf, size_t size);
void *chHeapAlloc(MemoryHeap *heapp, size_t size);
void chHeapFree(void *p);
size_t chHeapStatus(MemoryHeap *heapp, size_t *sizep);
#ifdef __cplusplus
}
#endif
#endif /* CH_USE_HEAP */
#endif /* _CHHEAP_H_ */
/** @} */
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