memoryi.h

本程序为ST公司开发的源代码

/*
 * memoryi.h
 *
 * Copyright (C) STMicroelectronics Ltd. 1996, 1997, 1998
 *
 * Heap memory partition macros and function declarations
 */

#ifndef __memoryi_h
#define __memoryi_h

#ifndef __os20_h
#error Must include os20.h first
#endif

#define partition_fbase     partition_fast.partition_fast_base
#define partition_fsize     partition_fast.partition_fast_size
#define partition_ffree     partition_fast.partition_fast_free

/* Mangle internal names to match those externally visible */
#define partition_base      partition_heap.partition_heap_base
#define partition_size      partition_heap.partition_heap_size
#define partition_top       partition_heap.partition_heap_top
#define partition_free_head partition_heap.partition_heap_free_head
#define partition_free_tail partition_heap.partition_heap_free_tail
#define partition_dummy     partition_heap.partition_heap_dummy
#define partition_initialised partition_heap.partition_heap_initialised


#define blockheader_t partition_heap_block_t
#define __next partition_heap_block_next
#define __blocksize partition_heap_block_blocksize


/* Check word value */

#define CHECK 0x80000001

/* check that ptr supplied by the user, userp, is word aligned, also */
/* check contents of blockp->info.next, if it isn't magic number fail */
/* also check that size is multiple of block_header size */
/* Avoid any attempt to dereference non-existant memory by checking that the
   pointer is within the heap first */
/*
#define invalid_pointer(heap, userp, blockp) \
  ((int)(userp) % sizeof(int) != 0 ||  \
   (int *)blockp < ((int  *)(heap)->partition_base) ||  \
   (int *)blockp >= (heap)->partition_top ||  \
   (blockp)->__next != (blockheader_t *)CHECK || \
   ((blockp)->__blocksize & ~(sizeof(blockheader_t) - 1)) != (blockp)->__blocksize)
   */

#define invalid_pointer(heap, userp, blockp) \
  ((int)(userp) % sizeof(int) != 0 ||  \
   (int *)blockp >= (heap)->partition_top ||  \
   (blockp)->__next != (blockheader_t *)CHECK || \
   ((blockp)->__blocksize & ~(sizeof(blockheader_t) - 1)) != (blockp)->__blocksize)

   /* function to initialise the heap */

     /*#pragma ST_translate(initheap, "initheap%c")*/

/*void report_partitions (void);*/

#endif