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engine: common: zone: disallow migrating allocations from one pool to another, as this isn't practically used anywhere

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This commit is contained in:
Alibek Omarov 2024-04-18 21:08:30 +03:00
parent 1f4f3d7fda
commit cd47c6b5b3
1 changed files with 9 additions and 11 deletions
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20
engine/common/zone.c
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@ -246,7 +246,7 @@ void *_Mem_Realloc( poolhandle_t poolptr, void *data, size_t size, qboolean clea
if( size <= 0 )
return data; // no need to reallocate
if( !poolptr )
if( unlikely( !poolptr ))
{
Sys_Error( "Mem_Realloc: pool == NULL (alloc at %s:%i)\n", filename, fileline );
return NULL;
@ -260,6 +260,13 @@ void *_Mem_Realloc( poolhandle_t poolptr, void *data, size_t size, qboolean clea
if( !Mem_CheckAllocHeader( "Mem_Realloc", mem, filename, fileline ))
return NULL;
if( unlikely( mem->poolptr != poolptr ))
{
Sys_Error( "Mem_Realloc: pool migration is not allowed (alloc at %s:%i, realloc at %s:%i)\n",
Mem_CheckFilename( mem->filename ), mem->fileline, filename, fileline );
return NULL;
}
oldsize = mem->size;
if( size == oldsize )
return data;
@ -289,16 +296,7 @@ void *_Mem_Realloc( poolhandle_t poolptr, void *data, size_t size, qboolean clea
}
else Mem_PoolSubtract( pool, oldsize - size );
// if allocation was migrated from one pool to another
// (this is possible with original Mem_Realloc func)
if( unlikely( mem->poolptr != poolptr ))
{
mempool_t *oldpool = Mem_FindPool( mem->poolptr );
Mem_PoolUnlinkAlloc( oldpool, mem );
Mem_PoolLinkAlloc( pool, mem );
}
else if( oldmem != (uintptr_t)mem ) // just relink pointers
if( oldmem != (uintptr_t)mem ) // just relink pointers
{
if( mem->next ) mem->next->prev = mem;
if( mem->prev ) mem->prev->next = mem;