mem.c

基于56F8346的异步电机VVVF控制程序。

/** ###################################################################
**
**     (c) Freescale Semiconductor
**     2004 All Rights Reserved
**
**
**     (c) Copyright UNIS, spol. s r.o. 1997-2004
**     UNIS, spol. s r.o.
**     Jundrovska 33
**     624 00 Brno
**     Czech Republic
**     http      : www.processorexpert.com
**     mail      : [e-mail]
** ###################################################################*/

/* File: memory.c */

#include "port.h"
#include "mem.h"
#include "arch.h"
#include "assert.h"
#include <string.h>
#include <stdio.h>

#ifdef MEM_THREADED_OS
#include "pthread.h"
#endif

/*******************************************************
* memory Package
*******************************************************/

#define ADDRESSING_8

bool        bMemInitialized = false;
mem_sPool   InternalMemoryPool;
mem_sPool   ExternalMemoryPool;
mem_sState  InitialState;
static void Initialize (void);


/*******************************************************
*
* Method: memMallocIM
*
* Description: This function allocates dynamic memory
*              of the specified size from the memory
*              partitions. The function memMallocIM
*              first tries to allocate the memory from
*              the internal memory partition. However,
*              if not enough space exists in the internal
*              memory partition to satisfy the dynamic
*              memory allocation, memMallocIM then tries
*              the allocation from the external memory partition.
*
* Arguments:
*       size - the size of the memory buffer to be
*              allocated in internal memory
*
* Return:      If memory is insufficient to satisfy the request
*              from either partition, memMallocIM returns NULL
*
*******************************************************/
void *  memMallocIM (size_t size)
{
  void * pMem;

  pMem=memMalloc(&InternalMemoryPool, size);
  if(pMem == NULL){
    pMem=memMalloc(&ExternalMemoryPool, size);
  }
  return pMem;
}


/*******************************************************
*
* Method: memCallocIM
*
* Description: This function dynamically allocates an array
*              with elements initialized to zero.
*              The memCallocIM function first tries to
*              reallocate the memory from the internal
*              memory partition. However,
*              if not enough space exists in the internal
*              memory partition to satisfy the dynamic
*              memory allocation, memMallocIM then tries
*              the allocation from the external memory partition.
*
* Arguments:
*       num  - the number of elements
*       size - the size of the memory buffer to be
*              allocated in internal memory
*
* Return:      If memory is insufficient to satisfy the request
*              from either partition, memCallocIM returns NULL
*
*******************************************************/
void *  memCallocIM (size_t num, size_t size)
{
  void * pMem;

  pMem=memCalloc(&InternalMemoryPool, num, size);
  if(pMem == NULL){
    pMem=memCalloc(&ExternalMemoryPool, num, size);
  }
  return pMem;
}


/*******************************************************
*
* Method: memReallocIM
*
* Description: This function dynamically reallocates and
*              resizes a memory buffer to the specified
*              size from the memory partitions. The function
*              memReallocIM first tries to reallocate
*              the memory from the internal memory partition.
*              However, if not enough space exists in
*              the internal memory partition to satisfy
*              the dynamic memory allocation, memReallocIM
*              then tries the allocation from the external
*              memory partition
*
* Arguments:
*   memblock - the address of the existing memory block
*              to reallocate
*       size - the new size of the memory buffer to be
*              allocated in internal memory
*
* Return:      If memory is insufficient to satisfy the request
*              from either partition, memReallocIM returns NULL
*
*******************************************************/
void * memReallocIM ( void *memblock, size_t size )
{
  void * pMem;

  pMem=memRealloc(&InternalMemoryPool, memblock, size);
  if(pMem == NULL){
    pMem=memRealloc(&ExternalMemoryPool, memblock, size);
  }
  return pMem;
}


/*******************************************************
*
* Method: memMallocAlignedIM
*
* Description: This function allocates dynamic memory
*              of the specified size from the memory
*              partitions and aligns the memory properly
*              to use modulo addressing. The function
*              memMallocAlignedIM first tries to allocate
*              the memory, properly aligned, from
*              the internal memory partition. However,
*              if not enough space exists in the internal
*              memory partition to satisfy the dynamic
*              memory allocation, or if the memory request
*              cannot be properly aligned, memMallocAlignedIM
*              then tries the allocation from the external
*              memory partition. If memMallocAlignedIM
*              cannot allocate an aligned buffer from
*              either partition, it calls memMallocIM
*              to try to allocate a buffer of the correct
*              size without the proper alignment.
*
* Arguments:
*       size - the new size of the memory buffer to be
*              allocated in internal memory
*
* Return:      If memory is insufficient to satisfy the request
*              from either partition, memMallocAlignedIM returns NULL
*
*******************************************************/
void *  memMallocAlignedIM (size_t size)
{
  void * pMem;

  pMem=memMallocAligned(&InternalMemoryPool, size);
  if(pMem == NULL){
    pMem=memMallocAligned(&ExternalMemoryPool, size);
    if(pMem == NULL){
      pMem=memMallocIM(size);
    }
  }
  return pMem;
}


/*******************************************************
*
* Method: memFreeIM
*
* Description: This function deallocates a memory block
*              in internal memory that previously had
*              been dynamically allocated with
*              the routine memMallocIM.
*
* Arguments:
*   memblock - pointer to previously allocated memory
*
* Return:      None
*
*******************************************************/
void memFreeIM (void * memblock)
{
  if(memIsIM(memblock)){
    memFree(&InternalMemoryPool, memblock);
  } else {
    memFree(&ExternalMemoryPool, memblock);
  }
}


/*******************************************************
*
* Method: memMallocEM
*
* Description: This function allocates dynamic memory
*              of the specified size from the memory
*              partitions. The function memMallocEM
*              first tries to allocate the memory from
*              the external memory partition. However,
*              if not enough space exists in the external
*              memory partition to satisfy the dynamic
*              memory allocation, memMallocEM then tries
*              the allocation from the internal memory partition.
*
* Arguments:
*       size - the size of the memory buffer to be
*              allocated in external memory
*
* Return:      If memory is insufficient to satisfy the request
*              from either partition, memMallocIM returns NULL
*
*******************************************************/
void *  memMallocEM (size_t size)
{
  void * pMem;

  pMem = memMalloc (&ExternalMemoryPool, size);
  if (pMem == NULL){
    pMem = memMalloc (&InternalMemoryPool, size);
  }
  return pMem;
}


/*******************************************************
*
* Method: memCallocEM
*
* Description: This function dynamically allocates an array
*              with elements initialized to zero.
*              The memCallocEM function first tries to
*              reallocate the memory from the external
*              memory partition. However,
*              if not enough space exists in the external
*              memory partition to satisfy the dynamic
*              memory allocation, memCallocEM then tries
*              the allocation from the internal memory partition.
*
* Arguments:
*       num  - the number of elements
*       size - the size of the memory buffer to be
*              allocated in external memory
*
* Return:      If memory is insufficient to satisfy the request
*              from either partition, memCallocIM returns NULL
*
*******************************************************/
void *  memCallocEM (size_t num, size_t size)
{
  void * pMem;

  pMem = memCalloc (&ExternalMemoryPool, num, size);
  if (pMem == NULL) {
    pMem = memCalloc (&InternalMemoryPool, num, size);
  }
  return pMem;
}


/*******************************************************
*
* Method: memReallocEM
*
* Description: This function dynamically reallocates and
*              resizes a memory buffer to the specified
*              size from the memory partitions. The function
*              memReallocEM first tries to reallocate
*              the memory from the external memory partition.
*              However, if not enough space exists in
*              the external memory partition to satisfy
*              the dynamic memory allocation, memReallocEM
*              then tries the allocation from the internal
*              memory partition
*
* Arguments:
*   memblock - the address of the existing memory block
*              to reallocate
*       size - the new size of the memory buffer to be
*              allocated in internal memory
*
* Return:      If memory is insufficient to satisfy the request
*              from either partition, memReallocIM returns NULL
*
*******************************************************/
void * memReallocEM ( void *memblock, size_t size )
{
  void * pMem;

  pMem = memRealloc (&ExternalMemoryPool, memblock, size);
  if (pMem == NULL) {
    pMem = memRealloc (&InternalMemoryPool, memblock, size);
  }
  return pMem;
}


/*******************************************************
*
* Method: memMallocAlignedEM
*
* Description: This function allocates dynamic memory
*              of the specified size from the memory
*              partitions and aligns the memory properly
*              to use modulo addressing. The function
*              memMallocAlignedEM first tries to allocate
*              the memory, properly aligned, from
*              the external memory partition. However,
*              if not enough space exists in the external
*              memory partition to satisfy the dynamic
*              memory allocation, or if the memory request
*              cannot be properly aligned, memMallocAlignedEM
*              then tries the allocation from the internal
*              memory partition. If memMallocAlignedEM