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Diffstat (limited to 'os/rt/include/chheap.h')
| -rw-r--r-- | os/rt/include/chheap.h | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/os/rt/include/chheap.h b/os/rt/include/chheap.h new file mode 100644 index 000000000..73e0d4148 --- /dev/null +++ b/os/rt/include/chheap.h @@ -0,0 +1,119 @@ +/*
+ ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
+ 2011,2012,2013 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_CFG_USE_HEAP || defined(__DOXYGEN__)
+
+/*===========================================================================*/
+/* Module constants. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Module pre-compile time settings. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Derived constants and error checks. */
+/*===========================================================================*/
+
+#if !CH_CFG_USE_MEMCORE
+#error "CH_CFG_USE_HEAP requires CH_CFG_USE_MEMCORE"
+#endif
+
+#if !CH_CFG_USE_MUTEXES && !CH_CFG_USE_SEMAPHORES
+#error "CH_CFG_USE_HEAP requires CH_CFG_USE_MUTEXES and/or CH_CFG_USE_SEMAPHORES"
+#endif
+
+/*===========================================================================*/
+/* Module data structures and types. */
+/*===========================================================================*/
+
+/**
+ * @brief Type of a memory heap.
+ */
+typedef struct memory_heap memory_heap_t;
+
+/**
+ * @brief Memory heap block header.
+ */
+union heap_header {
+ stkalign_t align;
+ struct {
+ union {
+ union heap_header *next; /**< @brief Next block in free list. */
+ memory_heap_t *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_CFG_USE_MUTEXES
+ mutex_t h_mtx; /**< @brief Heap access mutex. */
+#else
+ semaphore_t h_sem; /**< @brief Heap access semaphore. */
+#endif
+};
+
+/*===========================================================================*/
+/* Module macros. */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* External declarations. */
+/*===========================================================================*/
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+ void _heap_init(void);
+ void chHeapObjectInit(memory_heap_t *heapp, void *buf, size_t size);
+ void *chHeapAlloc(memory_heap_t *heapp, size_t size);
+ void chHeapFree(void *p);
+ size_t chHeapStatus(memory_heap_t *heapp, size_t *sizep);
+#ifdef __cplusplus
+}
+#endif
+
+/*===========================================================================*/
+/* Module inline functions. */
+/*===========================================================================*/
+
+#endif /* CH_CFG_USE_HEAP */
+
+#endif /* _CHHEAP_H_ */
+
+/** @} */
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