mirror of https://github.com/rusefi/ChibiOS.git
120 lines
4.3 KiB
C
120 lines
4.3 KiB
C
/*
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ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
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2011,2012,2013 Giovanni Di Sirio.
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This file is part of ChibiOS/RT.
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ChibiOS/RT is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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ChibiOS/RT is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* @file chheap.h
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* @brief Heaps macros and structures.
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*
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* @addtogroup heaps
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* @{
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*/
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#ifndef _CHHEAP_H_
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#define _CHHEAP_H_
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#if CH_USE_HEAP || defined(__DOXYGEN__)
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/*===========================================================================*/
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/* Module constants. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Module pre-compile time settings. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* Derived constants and error checks. */
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/*===========================================================================*/
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#if !CH_USE_MEMCORE
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#error "CH_USE_HEAP requires CH_USE_MEMCORE"
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#endif
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#if !CH_USE_MUTEXES && !CH_USE_SEMAPHORES
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#error "CH_USE_HEAP requires CH_USE_MUTEXES and/or CH_USE_SEMAPHORES"
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#endif
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/*===========================================================================*/
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/* Module data structures and types. */
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/*===========================================================================*/
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/**
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* @brief Type of a memory heap.
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*/
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typedef struct memory_heap memory_heap_t;
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/**
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* @brief Memory heap block header.
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*/
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union heap_header {
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stkalign_t align;
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struct {
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union {
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union heap_header *next; /**< @brief Next block in free list. */
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memory_heap_t *heap; /**< @brief Block owner heap. */
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} u; /**< @brief Overlapped fields. */
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size_t size; /**< @brief Size of the memory block. */
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} h;
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};
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/**
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* @brief Structure describing a memory heap.
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*/
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struct memory_heap {
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memgetfunc_t h_provider; /**< @brief Memory blocks provider for
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this heap. */
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union heap_header h_free; /**< @brief Free blocks list header. */
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#if CH_USE_MUTEXES
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mutex_t h_mtx; /**< @brief Heap access mutex. */
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#else
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semaphore_t h_sem; /**< @brief Heap access semaphore. */
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#endif
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};
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/*===========================================================================*/
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/* Module macros. */
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/*===========================================================================*/
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/*===========================================================================*/
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/* External declarations. */
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/*===========================================================================*/
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#ifdef __cplusplus
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extern "C" {
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#endif
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void _heap_init(void);
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void chHeapInit(memory_heap_t *heapp, void *buf, size_t size);
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void *chHeapAlloc(memory_heap_t *heapp, size_t size);
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void chHeapFree(void *p);
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size_t chHeapStatus(memory_heap_t *heapp, size_t *sizep);
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#ifdef __cplusplus
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}
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#endif
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/*===========================================================================*/
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/* Module inline functions. */
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/*===========================================================================*/
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#endif /* CH_USE_HEAP */
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#endif /* _CHHEAP_H_ */
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/** @} */
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