// seg002:0000
void __pascal far do_init_shad(const byte *source,int seq_index) {
memcpy_near(&Char, source, 7);
seqtbl_offset_char(seq_index);
Char.charid = charid_1_shadow;
demo_time = 0;
guard_skill = 3;
guardhp_delta = guardhp_curr = guardhp_max = 4;
saveshad();
}
//
// Z_Realloc
//
// haleyjd 09/18/06: Rewritten to be an actual realloc routine. The
// various cases are as follows:
//
// 1. If the block is NULL, is in virtual memory, or we're trying to set it to
// zero-byte size, we use Z_ReallocOld above.
// 2. If the block is smaller than the new size, we need to expand it. If the
// next block on the zone heap is free, check to see if it together with the
// current block is large enough. If so, merge the blocks. Now test to make
// sure the internal fragmentation does not exceed the split limit. If it
// does, resplit the blocks at the new boundary. If the next block wasn't
// free, we have to call Z_ReallocOld to move the entire block elsewhere.
// 3. If the block is larger than the new size, we can shrink it, but we only
// need to shrink it if the wasted space is larger than the split limit.
// If so, the block is split at its new boundary. If the next block on the
// zone heap is free, it is then necessary to merge the new free block with
// the next block on the heap. In the event the block is not shrunk, only the
// INSTRUMENTED data needs to be updated to reflect the new internal fragmen-
// tation.
// 4. If the block is already the same size as "n", we don't need to do anything
// aside from adjusting the INSTRUMENTED block data for debugging purposes.
//
void *(Z_Realloc)(void *ptr, size_t n, int tag, void **user, __string file, int line)
{
register memblock_t __near *block, *other;
register size_t curr_size = 0;
// davidph 12/09/12: Handle null and size 0 right here instead of in Z_ReallocOld.
if(n == 0) { (Z_Free)(ptr, file, line); return NULL; }
if(!ptr)
return (Z_Malloc)(n, tag, user, file, line);
// get current size of block
block = VoidToBlock(ptr);
Z_IDCheck(IDBOOL(block->id != ZONEID),
"Z_Realloc: Reallocated a block without ZONEID\n",
block, file, line);
other = block->next; // save pointer to next block
curr_size = block->size;
// round new size to CHUNK_SIZE
n = (n + CHUNK_SIZE - 1) & ~(CHUNK_SIZE - 1);
if(n > curr_size) // is new allocation size larger than current?
{
register size_t extra;
// haleyjd 10/03/06: free adjacent purgable blocks
while(other != zone && other != block &&
(other->tag == PU_FREE || other->tag >= PU_PURGELEVEL))
{
if(other->tag >= PU_PURGELEVEL)
{
(Z_Free)(BlockToVoid(other), file, line);
// reset pointer to next block
other = block->next;
}
// use current size of block; note it may have increased if it was
// merged with an adjacent free block
// if we've freed enough, stop
if(curr_size + other->size + HEADER_SIZE >= n)
break;
// move to next block
other = other->next;
}
// reset pointer
other = block->next;
// check to see if it can fit if we merge with the next block
if(other != zone && other->tag == PU_FREE &&
curr_size + other->size + HEADER_SIZE >= n)
{
// merge the blocks
if(rover == other)
rover = block;
(block->next = other->next)->prev = block;
block->size += other->size + HEADER_SIZE;
#ifdef INSTRUMENTED
// lost a block...
inactive_memory -= HEADER_SIZE;
// lost a free block...
free_memory -= other->size;
// increased active or purgable
if(block->tag >= PU_PURGELEVEL)
purgable_memory += other->size + HEADER_SIZE;
else
active_memory += other->size + HEADER_SIZE;
#endif
// check to see if there's enough extra to warrant splitting off
// a new free block
extra = block->size - n;
if(extra >= MIN_BLOCK_SPLIT + HEADER_SIZE)
{
register memblock_t __near *newb =
(memblock_t __near *)((char __near *)block + HEADER_SIZE + n);
(newb->next = block->next)->prev = newb;
(newb->prev = block)->next = newb;
block->size = n;
newb->size = extra - HEADER_SIZE;
newb->tag = PU_FREE;
if(rover == block)
rover = newb;
#ifdef INSTRUMENTED
// added a block...
inactive_memory += HEADER_SIZE;
// added a free block...
free_memory += newb->size;
// decreased active or purgable
if(block->tag >= PU_PURGELEVEL)
purgable_memory -= newb->size + HEADER_SIZE;
else
active_memory -= newb->size + HEADER_SIZE;
#endif
}
// subtract old internal fragmentation and add new
INSTRUMENT(inactive_memory -= block->extra);
INSTRUMENT(inactive_memory += (block->extra = block->size - n));
}
else // else, do old realloc (make new, copy old, free old)
{
// davidph 12/10/12: This was the only place Z_ReallocOld was called.
// And we know that ptr != NULL and n != 0 and n > curr_size.
register void *p = (Z_Malloc)(n, tag, user, file, line);
memcpy_near((void __near *)p, (void __near *)ptr, curr_size);
(Z_Free)(ptr, file, line);
if(user) // in case Z_Free nullified same user
*user = p;
return p;
}
}
else if(n < curr_size) // is new allocation size smaller than current?
{
// check to see if there's enough extra to warrant splitting off
// a new free block
size_t extra = curr_size - n;
if(extra >= MIN_BLOCK_SPLIT + HEADER_SIZE)
{
register memblock_t __near *newb =
(memblock_t __near *)((char __near *)block + HEADER_SIZE + n);
(newb->next = block->next)->prev = newb;
(newb->prev = block)->next = newb;
block->size = n;
newb->size = extra - HEADER_SIZE;
newb->tag = PU_FREE;
#ifdef INSTRUMENTED
// added a block...
inactive_memory += HEADER_SIZE;
// added a free block...
free_memory += newb->size;
// decreased purgable or active
if(block->tag >= PU_PURGELEVEL)
purgable_memory -= newb->size + HEADER_SIZE;
else
active_memory -= newb->size + HEADER_SIZE;
#endif
// may need to merge new block with next block
if(other && other->tag == PU_FREE && other != zone)
{
if(rover == other) // Move back rover if it points at next block
rover = newb;
(newb->next = other->next)->prev = newb;
newb->size += other->size + HEADER_SIZE;
// deleted a block...
INSTRUMENT(inactive_memory -= HEADER_SIZE);
// space between blocks is now free
INSTRUMENT(free_memory += HEADER_SIZE);
}
}
// else, leave block the same size
// subtract old internal fragmentation and add new
INSTRUMENT(inactive_memory -= block->extra);
INSTRUMENT(inactive_memory += (block->extra = block->size - n));
}
// else new allocation size is same as current, don't change it
// modify the block
INSTRUMENT(block->file = file);
INSTRUMENT(block->line = line);
// reset ptr for consistency
ptr = BlockToVoid(block);
if(block->user != user)
{
if(block->user) // nullify old user if any
*(block->user) = NULL;
block->user = user; // set block's new user
if(user) // if non-null, set user to allocation
*user = ptr;
}
// let Z_ChangeTag handle changing the tag
if(block->tag != tag)
(Z_ChangeTag)(ptr, tag, file, line);
Z_PrintStats(); // print memory allocation stats
Z_LogPrintf("* Z_Realloc(ptr=%p, n=%u, tag=%d, user=%p, source=%s:%d)\n",
ptr, n, tag, user, file, line);
return ptr;
}
