/* Function : CyU3PMemAlloc
* Description : This function allocates memory required for various OS objects in the
* firmware application. This function is used by the SDK internal drivers
* in addition to the application code itself.
* The default implementation makes use of the ThreadX byte pool services.
* If memory leak and corruption checking is enabled, the implementation
* adds a 20 byte header and a 4 byte footer around the memory block.
* Parameters :
* size : Size of memory required in bytes.
* Return Value : Pointer to the allocated memory block.
*/
void *
CyU3PMemAlloc (
uint32_t size)
{
void *ret_p;
uint32_t status;
#ifdef CYFXTX_ERRORDETECTION
MemBlockInfo *block_p;
#endif
/* Round size up to a multiple of 4 bytes. */
size = ROUND_UP (size, 4);
#ifdef CYFXTX_ERRORDETECTION
/* If memory checks are enabled, add memory for the header and footer. */
if (glMemEnableChecks)
size += sizeof (MemBlockInfo) + sizeof (uint32_t);
#endif
/* Cannot wait in interrupt context */
if (CyU3PThreadIdentify ())
{
status = CyU3PByteAlloc (&glMemBytePool, (void **)&ret_p, size, CY_U3P_MEM_ALLOC_TIMEOUT);
}
else
{
status = CyU3PByteAlloc (&glMemBytePool, (void **)&ret_p, size, CYU3P_NO_WAIT);
}
if (status == CY_U3P_SUCCESS)
{
#ifdef CYFXTX_ERRORDETECTION
if (glMemEnableChecks)
{
/* Store the header information used for leak and corruption checks. */
block_p = (MemBlockInfo *)ret_p;
block_p->alloc_id = glMemAllocCnt++;
block_p->alloc_size = size;
block_p->prev_blk = glMemInUseList;
block_p->next_blk = 0;
block_p->start_sig = CY_U3P_MEM_START_SIG;
if (glMemInUseList != 0)
glMemInUseList->next_blk = block_p;
glMemInUseList = block_p;
/* Add the end block signature as a footer. */
((uint32_t *)block_p)[BYTE_TO_DWORD (size) - 1] = CY_U3P_MEM_END_SIG;
/* Update the return pointer to skip the header created. */
ret_p = (void *)((uint8_t *)block_p + sizeof (MemBlockInfo));
}
#endif
return ret_p;
}
return (NULL);
}
void *CyU3PMemAlloc(uint32_t size) {
void *ret_p;
uint32_t status;
// Cannot wait in interrupt context
if (CyU3PThreadIdentify()) {
status = CyU3PByteAlloc(&glMemBytePool, (void **)&ret_p, size, CY_U3P_MEM_ALLOC_TIMEOUT);
} else {
status = CyU3PByteAlloc(&glMemBytePool, (void **)&ret_p, size, CYU3P_NO_WAIT);
}
if (status == CY_U3P_SUCCESS) {
return ret_p;
}
return (NULL);
}