public static void MemMove(Mem to, Mem from)
{
Debug.Assert(from.Ctx == null || MutexEx.Held(from.Ctx.Mutex));
Debug.Assert(to.Ctx == null || MutexEx.Held(to.Ctx.Mutex));
Debug.Assert(from.Ctx == null || to.Ctx == null || from.Ctx == to.Ctx);
MemRelease(to);
from._memcpy(ref to);
from.Flags = MEM.Null;
from.Del = null;
from.Z = null;
from.Z_ = null;
}
//: #define MEMCELLSIZE (size_t)(&(((Mem *)0)->Malloc)) // Size of struct Mem not including the Mem.zMalloc member.
public static void MemShallowCopy(Mem to, Mem from, MEM srcType)
{
Debug.Assert((from.Flags & MEM.RowSet) == 0);
MemReleaseExternal(to);
from._memcpy(ref to);
to.Del = null;
if ((from.Flags & MEM.Static) != 0)
{
to.Flags &= ~(MEM.Dyn | MEM.Static | MEM.Ephem);
Debug.Assert(srcType == MEM.Ephem || srcType == MEM.Static);
to.Flags |= srcType;
}
}
public static RC MemCopy(Mem to, Mem from)
{
Debug.Assert((from.Flags & MEM.RowSet) == 0);
E.VdbeMemRelease(to);
from._memcpy(ref to);
to.Flags &= ~MEM.Dyn;
RC rc = RC.OK;
if ((to.Flags & (MEM.Str | MEM.Blob)) != 0)
{
if ((from.Flags & MEM.Static) == 0)
{
to.Flags |= MEM.Ephem;
rc = MemMakeWriteable(to);
}
}
return(rc);
}
