void * OCI_MemAlloc
(
int ptr_type,
size_t block_size,
size_t block_count,
boolean zero_fill
)
{
OCI_MemoryBlock * mem_block = NULL;
size_t size = sizeof(OCI_MemoryBlock) + (block_size * block_count);
mem_block = (OCI_MemoryBlock *)malloc(size);
if (mem_block)
{
if (zero_fill)
{
memset(mem_block, 0, size);
}
mem_block->type = ptr_type;
mem_block->size = (unsigned int) size;
OCI_MemUpdateBytes(mem_block->type, mem_block->size);
}
else
{
OCI_ExceptionMemory(ptr_type, size, NULL, NULL);
}
return ((unsigned char *) mem_block) + sizeof(*mem_block);
}
void * OCI_MemRealloc
(
void * ptr_mem,
int ptr_type,
size_t block_size,
size_t block_count
)
{
OCI_MemoryBlock * mem_block = NULL;
size_t size = 0;
if (ptr_mem)
{
mem_block = (OCI_MemoryBlock *) (((unsigned char*)ptr_mem) - sizeof(*mem_block));
}
size = sizeof(OCI_MemoryBlock) + (block_size * block_count);
if (!mem_block || mem_block->size < size)
{
void *ptr_new = realloc(mem_block, size);
if (ptr_new)
{
big_int size_diff = 0;
mem_block = (OCI_MemoryBlock *) ptr_new;
size_diff = (big_int) size - mem_block->size;
mem_block->type = ptr_type;
mem_block->size = (unsigned int) size;
OCI_MemUpdateBytes(mem_block->type, size_diff);
}
else if (ptr_mem)
{
OCI_MemFree(ptr_mem);
OCI_ExceptionMemory(ptr_type, size, NULL, NULL);
mem_block = NULL;
}
}
return mem_block ? ((unsigned char *)mem_block) + sizeof(*mem_block) : NULL;
}
