diff options
Diffstat (limited to 'nuttx/mm/mm_internal.h')
| -rw-r--r-- | nuttx/mm/mm_internal.h | 102 |
1 files changed, 68 insertions, 34 deletions
diff --git a/nuttx/mm/mm_internal.h b/nuttx/mm/mm_internal.h index 21cf253d7..9f1616978 100644 --- a/nuttx/mm/mm_internal.h +++ b/nuttx/mm/mm_internal.h @@ -1,7 +1,7 @@ /**************************************************************************** * mm/mm_internal.h * - * Copyright (C) 2007, 2009, 2011 Gregory Nutt. All rights reserved. + * Copyright (C) 2007, 2009, 2011, 2013 Gregory Nutt. All rights reserved. * Author: Gregory Nutt <gnutt@nuttx.org> * * Redistribution and use in source and binary forms, with or without @@ -113,7 +113,7 @@ * Public Types ****************************************************************************/ -/* Determine the size of the chunk size/offset type */ +/* Determines the size of the chunk size/offset type */ #ifdef CONFIG_MM_SMALL typedef uint16_t mmsize_t; @@ -170,6 +170,39 @@ struct mm_freenode_s #define CHECK_FREENODE_SIZE \ DEBUGASSERT(sizeof(struct mm_freenode_s) == SIZEOF_MM_FREENODE) +/* This describes one heap (possibly with multiple regions) */ + +struct mm_heap_s +{ + /* Mutually exclusive access to this data set is enforced with + * the following un-named semaphore. + */ + + sem_t mm_semaphore; + pid_t mm_holder; + int mm_counts_held; + + /* This is the size of the heap provided to mm */ + + size_t mm_heapsize; + + /* This is the first and last nodes of the heap */ + + FAR struct mm_allocnode_s *mm_heapstart[CONFIG_MM_REGIONS]; + FAR struct mm_allocnode_s *mm_heapend[CONFIG_MM_REGIONS]; + +#if CONFIG_MM_REGIONS > 1 + int mm_nregions; +#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. + */ + + struct mm_freenode_s mm_nodelist[MM_NNODES]; +}; + /* Normally defined in stdlib.h */ #ifdef MM_TEST @@ -187,57 +220,58 @@ struct mallinfo #endif /**************************************************************************** - * Global Variables + * Public 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; +#undef EXTERN +#if defined(__cplusplus) +#define EXTERN extern "C" +extern "C" +{ #else -# define g_nregions 1 +#define EXTERN extern #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. - */ +#if !defined(CONFIG_NUTTX_KERNEL) || !defined(__KERNEL__) +/* This is the user heap */ + +EXTERN struct mm_heap_s g_mmheap; -extern FAR struct mm_freenode_s g_nodelist[MM_NNODES]; +#endif /**************************************************************************** * 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); +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); +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); +void mm_shrinkchunk(FAR struct mm_heap_s *heap, + FAR struct mm_allocnode_s *node, size_t size); +void mm_addfreechunk(FAR struct mm_heap_s *heap, + FAR struct mm_freenode_s *node); +int mm_size2ndx(size_t size); +void mm_seminitialize(FAR struct mm_heap_s *heap); +void mm_takesemaphore(FAR struct mm_heap_s *heap); +void mm_givesemaphore(FAR struct mm_heap_s *heap); #ifdef MM_TEST -int mm_getsemaphore(void); +int mm_getsemaphore(FAR struct mm_heap_s *heap); +#endif + +#undef EXTERN +#if defined(__cplusplus) +} #endif #endif /* __MM_MM_INTERNAL_H */ |