public static RC SetupLookaside(TagBase tag, byte[] buf, int size, int count)
{
if (tag.Lookaside.Outs != 0)
{
return(RC.BUSY);
}
// Free any existing lookaside buffer for this handle before allocating a new one so we don't have to have space for both at the same time.
if (tag.Lookaside.Malloced)
{
C._free(ref tag.Lookaside.Start);
}
// The size of a lookaside slot after ROUNDDOWN8 needs to be larger than a pointer to be useful.
size = C._ROUNDDOWN8(size); // IMP: R-33038-09382
if (size <= (int)4)
{
size = 0;
}
if (count < 0)
{
count = 0;
}
byte[] start;
if (size == 0 || count == 0)
{
size = 0;
start = null;
}
else if (buf == null)
{
C._benignalloc_begin();
start = new byte[size * count]; // IMP: R-61949-35727
C._benignalloc_end();
}
else
{
start = buf;
}
tag.Lookaside.Start = start;
tag.Lookaside.Free = null;
tag.Lookaside.Size = (ushort)size;
if (start != null)
{
Debug.Assert(size > 4);
TagBase.LookasideSlot p = (TagBase.LookasideSlot)null; //: start;
for (int i = count - 1; i >= 0; i--)
{
p.Next = tag.Lookaside.Free;
tag.Lookaside.Free = p;
p = (TagBase.LookasideSlot)null; //: &((uint8 *)p)[size];
}
tag.Lookaside.End = p;
tag.Lookaside.Enabled = true;
tag.Lookaside.Malloced = (buf == null);
}
else
{
tag.Lookaside.End = null;
tag.Lookaside.Enabled = false;
tag.Lookaside.Malloced = false;
}
return(RC.OK);
}
public static RC SetupLookaside(TagBase tag, byte[] buf, int size, int count)
{
if (tag.Lookaside.Outs != 0)
return RC.BUSY;
// Free any existing lookaside buffer for this handle before allocating a new one so we don't have to have space for both at the same time.
if (tag.Lookaside.Malloced)
C._free(ref tag.Lookaside.Start);
// The size of a lookaside slot after ROUNDDOWN8 needs to be larger than a pointer to be useful.
size = C._ROUNDDOWN8(size); // IMP: R-33038-09382
if (size <= (int)4) size = 0;
if (count < 0) count = 0;
byte[] start;
if (size == 0 || count == 0)
{
size = 0;
start = null;
}
else if (buf == null)
{
C._benignalloc_begin();
start = new byte[size * count]; // IMP: R-61949-35727
C._benignalloc_end();
}
else
start = buf;
tag.Lookaside.Start = start;
tag.Lookaside.Free = null;
tag.Lookaside.Size = (ushort)size;
if (start != null)
{
Debug.Assert(size > 4);
TagBase.LookasideSlot p = (TagBase.LookasideSlot)null; //: start;
for (int i = count - 1; i >= 0; i--)
{
p.Next = tag.Lookaside.Free;
tag.Lookaside.Free = p;
p = (TagBase.LookasideSlot)null; //: &((uint8 *)p)[size];
}
tag.Lookaside.End = p;
tag.Lookaside.Enabled = true;
tag.Lookaside.Malloced = (buf == null);
}
else
{
tag.Lookaside.End = null;
tag.Lookaside.Enabled = false;
tag.Lookaside.Malloced = false;
}
return RC.OK;
}
