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Diffstat (limited to 'nuttx/mm/mm_internal.h')
| -rw-r--r-- | nuttx/mm/mm_internal.h | 243 |
1 files changed, 0 insertions, 243 deletions
diff --git a/nuttx/mm/mm_internal.h b/nuttx/mm/mm_internal.h deleted file mode 100644 index 21cf253d7..000000000 --- a/nuttx/mm/mm_internal.h +++ /dev/null @@ -1,243 +0,0 @@ -/**************************************************************************** - * mm/mm_internal.h - * - * Copyright (C) 2007, 2009, 2011 Gregory Nutt. All rights reserved. - * Author: Gregory Nutt <gnutt@nuttx.org> - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * 3. Neither the name NuttX nor the names of its contributors may be - * used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS - * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE - * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, - * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS - * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED - * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN - * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. - * - ****************************************************************************/ - -#ifndef __MM_MM_INTERNAL_H -#define __MM_MM_INTERNAL_H - -/**************************************************************************** - * Included Files - ****************************************************************************/ - -/**************************************************************************** - * Pre-processor Definitions - ****************************************************************************/ -/* Configuration ************************************************************/ -/* If the MCU has a small (16-bit) address capability, then we will use - * a smaller chunk header that contains 16-bit size/offset information. - * We will also use the smaller header on MCUs with wider addresses if - * CONFIG_MM_SMALL is selected. This configuration is common with MCUs - * that have a large FLASH space, but only a tiny internal SRAM. - */ - -#ifdef CONFIG_SMALL_MEMORY - /* If the MCU has a small addressing capability, then for the smaller - * chunk header. - */ - -# undef CONFIG_MM_SMALL -# define CONFIG_MM_SMALL 1 -#endif - -/* Chunk Header Definitions *************************************************/ -/* These definitions define the characteristics of allocator - * - * MM_MIN_SHIFT is used to define MM_MIN_CHUNK. - * MM_MIN_CHUNK - is the smallest physical chunk that can - * be allocated. It must be at least a large as - * sizeof(struct mm_freenode_s). Larger values may - * improve performance slightly, but will waste memory - * due to quantization losses. - * - * MM_MAX_SHIFT is used to define MM_MAX_CHUNK - * MM_MAX_CHUNK is the largest, contiguous chunk of memory - * that can be allocated. It can range from 16-bytes to - * 4Gb. Larger values of MM_MAX_SHIFT can cause larger - * data structure sizes and, perhaps, minor performance - * losses. - */ - -#ifdef CONFIG_MM_SMALL -# define MM_MIN_SHIFT 4 /* 16 bytes */ -# define MM_MAX_SHIFT 15 /* 32 Kb */ -#else -# define MM_MIN_SHIFT 4 /* 16 bytes */ -# define MM_MAX_SHIFT 22 /* 4 Mb */ -#endif - -/* All other definitions derive from these two */ - -#define MM_MIN_CHUNK (1 << MM_MIN_SHIFT) -#define MM_MAX_CHUNK (1 << MM_MAX_SHIFT) -#define MM_NNODES (MM_MAX_SHIFT - MM_MIN_SHIFT + 1) - -#define MM_GRAN_MASK (MM_MIN_CHUNK-1) -#define MM_ALIGN_UP(a) (((a) + MM_GRAN_MASK) & ~MM_GRAN_MASK) -#define MM_ALIGN_DOWN(a) ((a) & ~MM_GRAN_MASK) - -/* An allocated chunk is distinguished from a free chunk by - * bit 31 of the 'preceding' chunk size. If set, then this is - * an allocated chunk. - */ - -#ifdef CONFIG_MM_SMALL -# define MM_ALLOC_BIT 0x8000 -#else -# define MM_ALLOC_BIT 0x80000000 -#endif -#define MM_IS_ALLOCATED(n) \ - ((int)((struct mm_allocnode_s*)(n)->preceding) < 0)) - -/**************************************************************************** - * Public Types - ****************************************************************************/ - -/* Determine the size of the chunk size/offset type */ - -#ifdef CONFIG_MM_SMALL - typedef uint16_t mmsize_t; -# define MMSIZE_MAX 0xffff -#else - typedef size_t mmsize_t; -# define MMSIZE_MAX SIZE_MAX -#endif - -/* This describes an allocated chunk. An allocated chunk is - * distinguished from a free chunk by bit 15/31 of the 'preceding' chunk - * size. If set, then this is an allocated chunk. - */ - -struct mm_allocnode_s -{ - mmsize_t size; /* Size of this chunk */ - mmsize_t preceding; /* Size of the preceding chunk */ -}; - -/* What is the size of the allocnode? */ - -#ifdef CONFIG_MM_SMALL -# define SIZEOF_MM_ALLOCNODE 4 -#else -# define SIZEOF_MM_ALLOCNODE 8 -#endif - -#define CHECK_ALLOCNODE_SIZE \ - DEBUGASSERT(sizeof(struct mm_allocnode_s) == SIZEOF_MM_ALLOCNODE) - -/* This describes a free chunk */ - -struct mm_freenode_s -{ - mmsize_t size; /* Size of this chunk */ - mmsize_t preceding; /* Size of the preceding chunk */ - FAR struct mm_freenode_s *flink; /* Supports a doubly linked list */ - FAR struct mm_freenode_s *blink; -}; - -/* What is the size of the freenode? */ - -#ifdef CONFIG_MM_SMALL -# ifdef CONFIG_SMALL_MEMORY -# define SIZEOF_MM_FREENODE 8 -# else -# define SIZEOF_MM_FREENODE 12 -# endif -#else -# define SIZEOF_MM_FREENODE 16 -#endif - -#define CHECK_FREENODE_SIZE \ - DEBUGASSERT(sizeof(struct mm_freenode_s) == SIZEOF_MM_FREENODE) - -/* Normally defined in stdlib.h */ - -#ifdef MM_TEST -struct mallinfo -{ - int arena; /* This is the total size of memory allocated - * for use by malloc in bytes. */ - int ordblks; /* This is the number of free (not in use) chunks */ - int mxordblk; /* Size of the largest free (not in use) chunk */ - int uordblks; /* This is the total size of memory occupied by - * chunks handed out by malloc. */ - int fordblks; /* This is the total size of memory occupied - * by free (not in use) chunks.*/ -}; -#endif - -/**************************************************************************** - * Global Variables - ****************************************************************************/ - -/* This is the size of the heap provided to mm */ - -extern size_t g_heapsize; - -/* This is the first and last nodes of the heap */ - -extern FAR struct mm_allocnode_s *g_heapstart[CONFIG_MM_REGIONS]; -extern FAR struct mm_allocnode_s *g_heapend[CONFIG_MM_REGIONS]; - -#if CONFIG_MM_REGIONS > 1 -extern int g_nregions; -#else -# define g_nregions 1 -#endif - -/* All free nodes are maintained in a doubly linked list. This - * array provides some hooks into the list at various points to - * speed searches for free nodes. - */ - -extern FAR struct mm_freenode_s g_nodelist[MM_NNODES]; - -/**************************************************************************** - * Public Function Prototypes - ****************************************************************************/ - -#ifdef MM_TEST -FAR void *mm_malloc(size_t); -void mm_free(void*); -FAR void *mm_realloc(void*, size_t); -FAR void *mm_memalign(size_t, size_t); -FAR void *mm_zalloc(size_t); -FAR void *mm_calloc(size_t, size_t); -#ifdef CONFIG_CAN_PASS_STRUCTS -struct mallinfo mallinfo(void); -#else -int mallinfo(struct mallinfo *info); -#endif -#endif - -void mm_shrinkchunk(FAR struct mm_allocnode_s *node, size_t size); -void mm_addfreechunk(FAR struct mm_freenode_s *node); -int mm_size2ndx(size_t size); -void mm_seminitialize(void); -void mm_takesemaphore(void); -void mm_givesemaphore(void); -#ifdef MM_TEST -int mm_getsemaphore(void); -#endif - -#endif /* __MM_MM_INTERNAL_H */ |