📄 os_mem.lst
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/*$PAGE*/
/*
*********************************************************************************************************
* ASSIGN A NAME TO A MEMORY PARTITION
*
* Description: This function assigns a name to a memory partition.
*
* Arguments : pmem is a pointer to the memory partition
*
* pname is a pointer to an ASCII string that contains the name of the memory partition.
*
* err is a pointer to an error code that can contain one of the following values:
*
* OS_NO_ERR if the name was copied to 'pname'
* OS_MEM_INVALID_PMEM if you passed a NULL pointer for 'pmem'
* OS_ERR_PNAME_NULL You passed a NULL pointer for 'pname'
* OS_MEM_NAME_TOO_LONG if the name doesn't fit in the storage area
*
* Returns : None
*********************************************************************************************************
*/
#if OS_MEM_NAME_SIZE > 0
void OSMemNameSet (OS_MEM *pmem, char *pname, INT8U *err)
{
#if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
OS_CPU_SR cpu_sr;
#endif
INT8U len;
OS_ENTER_CRITICAL();
#if OS_ARG_CHK_EN > 0
if (pmem == (OS_MEM *)0) { /* Is 'pmem' a NULL pointer? */
OS_EXIT_CRITICAL(); /* Yes */
*err = OS_MEM_INVALID_PMEM;
}
if (pname == (char *)0) { /* Is 'pname' a NULL pointer? */
OS_EXIT_CRITICAL(); /* Yes */
*err = OS_ERR_PNAME_NULL;
return;
}
C51 COMPILER V8.05a OS_MEM 04/11/2007 16:19:49 PAGE 5
#endif
len = strlen(pname); /* Can we fit the string in the storage area? */
if (len > (OS_MEM_NAME_SIZE - 1)) { /* No */
OS_EXIT_CRITICAL();
*err = OS_MEM_NAME_TOO_LONG;
return;
}
(void)strcpy(pmem->OSMemName, pname); /* Yes, copy name to the memory partition header */
OS_EXIT_CRITICAL();
*err = OS_NO_ERR;
}
#endif
/*$PAGE*/
/*
*********************************************************************************************************
* RELEASE A MEMORY BLOCK
*
* Description : Returns a memory block to a partition
*
* Arguments : pmem is a pointer to the memory partition control block
*
* pblk is a pointer to the memory block being released.
*
* Returns : OS_NO_ERR if the memory block was inserted into the partition
* OS_MEM_FULL if you are returning a memory block to an already FULL memory
* partition (You freed more blocks than you allocated!)
* OS_MEM_INVALID_PMEM if you passed a NULL pointer for 'pmem'
* OS_MEM_INVALID_PBLK if you passed a NULL pointer for the block to release.
*********************************************************************************************************
*/
INT8U OSMemPut (OS_MEM *pmem, void *pblk)
{
#if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
OS_CPU_SR cpu_sr;
#endif
#if OS_ARG_CHK_EN > 0
if (pmem == (OS_MEM *)0) { /* Must point to a valid memory partition */
return (OS_MEM_INVALID_PMEM);
}
if (pblk == (void *)0) { /* Must release a valid block */
return (OS_MEM_INVALID_PBLK);
}
#endif
OS_ENTER_CRITICAL();
if (pmem->OSMemNFree >= pmem->OSMemNBlks) { /* Make sure all blocks not already returned */
OS_EXIT_CRITICAL();
return (OS_MEM_FULL);
}
*(void **)pblk = pmem->OSMemFreeList; /* Insert released block into free block list */
pmem->OSMemFreeList = pblk;
pmem->OSMemNFree++; /* One more memory block in this partition */
OS_EXIT_CRITICAL();
return (OS_NO_ERR); /* Notify caller that memory block was released */
}
/*$PAGE*/
/*
*********************************************************************************************************
* QUERY MEMORY PARTITION
C51 COMPILER V8.05a OS_MEM 04/11/2007 16:19:49 PAGE 6
*
* Description : This function is used to determine the number of free memory blocks and the number of
* used memory blocks from a memory partition.
*
* Arguments : pmem is a pointer to the memory partition control block
*
* pdata is a pointer to a structure that will contain information about the memory
* partition.
*
* Returns : OS_NO_ERR If no errors were found.
* OS_MEM_INVALID_PMEM if you passed a NULL pointer for 'pmem'
* OS_MEM_INVALID_PDATA if you passed a NULL pointer for the block to release.
*********************************************************************************************************
*/
#if OS_MEM_QUERY_EN > 0
INT8U OSMemQuery (OS_MEM *pmem, OS_MEM_DATA *pdata)
{
#if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
OS_CPU_SR cpu_sr;
#endif
#if OS_ARG_CHK_EN > 0
if (pmem == (OS_MEM *)0) { /* Must point to a valid memory partition */
return (OS_MEM_INVALID_PMEM);
}
if (pdata == (OS_MEM_DATA *)0) { /* Must release a valid storage area for the data */
return (OS_MEM_INVALID_PDATA);
}
#endif
OS_ENTER_CRITICAL();
pdata->OSAddr = pmem->OSMemAddr;
pdata->OSFreeList = pmem->OSMemFreeList;
pdata->OSBlkSize = pmem->OSMemBlkSize;
pdata->OSNBlks = pmem->OSMemNBlks;
pdata->OSNFree = pmem->OSMemNFree;
OS_EXIT_CRITICAL();
pdata->OSNUsed = pdata->OSNBlks - pdata->OSNFree;
return (OS_NO_ERR);
}
#endif /* OS_MEM_QUERY_EN */
/*$PAGE*/
/*
*********************************************************************************************************
* INITIALIZE MEMORY PARTITION MANAGER
*
* Description : This function is called by uC/OS-II to initialize the memory partition manager. Your
* application MUST NOT call this function.
*
* Arguments : none
*
* Returns : none
*
* Note(s) : This function is INTERNAL to uC/OS-II and your application should not call it.
*********************************************************************************************************
*/
void OS_MemInit (void)
{
#if OS_MAX_MEM_PART == 1
OSMemFreeList = (OS_MEM *)&OSMemTbl[0]; /* Point to beginning of free list */
C51 COMPILER V8.05a OS_MEM 04/11/2007 16:19:49 PAGE 7
(void)memset(&OSMemTbl[0], 0, sizeof(OSMemTbl)); /* Clear the memory partition table */
#endif
#if OS_MAX_MEM_PART >= 2
OS_MEM *pmem;
INT16U i;
(void)memset(&OSMemTbl[0], 0, sizeof(OSMemTbl)); /* Clear the memory partition table */
pmem = (OS_MEM *)&OSMemTbl[0]; /* Point to memory control block (MCB) */
for (i = 0; i < (OS_MAX_MEM_PART - 1); i++) { /* Init. list of free memory partitions */
pmem->OSMemFreeList = (void *)&OSMemTbl[i+1]; /* Chain list of free partitions */
#if OS_MEM_NAME_SIZE > 0
(void)strcpy(pmem->OSMemName, "?"); /* Unknown name */
#endif
pmem++;
}
pmem->OSMemFreeList = (void *)0; /* Initialize last node */
#if OS_MEM_NAME_SIZE > 0
(void)strcpy(pmem->OSMemName, "?"); /* Unknown name */
#endif
OSMemFreeList = (OS_MEM *)&OSMemTbl[0]; /* Point to beginning of free list */
#endif
}
#endif /* OS_MEM_EN */
MODULE INFORMATION: STATIC OVERLAYABLE
CODE SIZE = ---- ----
CONSTANT SIZE = ---- ----
XDATA SIZE = ---- ----
PDATA SIZE = ---- ----
DATA SIZE = ---- ----
IDATA SIZE = ---- ----
BIT SIZE = ---- ----
END OF MODULE INFORMATION.
C51 COMPILATION COMPLETE. 0 WARNING(S), 0 ERROR(S)
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