/// <summary>
/// Update refrence by Key
/// </summary>
/// <param name="key"></param>
/// <returns></returns>
public void Update(long key, VSAllocation a)
{
long[] ret = this.SearchKey(key);
if (ret[2] >= 0)
{
KeyBlockAllocWrite.Write((ret[2] * KeyBlockDef.BLOCK_ITEM_LENGTH) + KeyBlockDef.A_Address, a.DescriptorAddress);
}
}
/// <summary>
/// Write FBQE
/// </summary>
/// <param name="f"></param>
private void SerializeFBQE(FBQE f)
{
VSLib.CopyBytes(buffer, VSLib.ConvertStringToByte(DEFS.FBQE_SIGNATURE), f.address + SG_POS, SG_LEN);
VSLib.CopyBytes(buffer, VSLib.ConvertLongToByte(f.ADDRESS_START), f.address + ADDRESS_START_POS, ADDRESS_START_LEN);
VSLib.CopyBytes(buffer, VSLib.ConvertLongToByte(f.ADDRESS_END), f.address + ADDRESS_END_POS, ADDRESS_END_LEN);
VSLib.CopyBytes(buffer, VSLib.ConvertLongToByte(f.LENGTH), f.address + LENGTH_POS, LENGTH_LEN);
VSLib.CopyBytes(buffer, VSLib.ConvertIntToByte(f.PREV), f.address + PREV_POS, PREV_LEN);
VSLib.CopyBytes(buffer, VSLib.ConvertIntToByte(f.NEXT), f.address + NEXT_POS, NEXT_LEN);
F_Object.Write(f.address, VSLib.GetByteArray(buffer, f.address, FBQE_LENGTH), FBQE_LENGTH);
}
/// <summary>
/// Add reference
/// </summary>
/// <param name="rf"></param>
/// <returns></returns>
internal bool add_ref(long rf)
{
long[] refs = REFS;
for (int i = 0; i < refs.Length; i++)
{
if (refs[i] == rf)
{
return(true);
}
}
if ((ALLOCATION.Size - AVLNODE_SIZE) < 8)
{
long ext_size = this.UNIQUE ? DEFS.MIN_SPACE_ALLOCATION_CHUNK : (DEFS.MIN_SPACE_ALLOCATION_CHUNK * 3);
sp.ExtendSpace(ALLOCATION, ext_size);
}
ALLOCATION.Write(REF_POS + (REF_COUNT * 8), rf);
REF_COUNT++;
return(true);
}
/// <summary>
/// Initialize data structures
/// </summary>
private void Initialize()
{
KeyHeader = new KeyHeaderDef();
// Get root allocation
KeyHeaderAlloc = sp.GetRootAllocation(DEFS.POOL_KEY);
// If ROOT doesn't exist yet - initial allocation
if (KeyHeaderAlloc == null)
{
// Allocate header space
KeyHeaderAlloc = sp.AllocateSpace(KeyHeaderDef.KEYROOT_SIZE, DEFS.POOL_KEY, generateID: false);
KeyHeaderAlloc.Write(KeyHeaderDef.A_DescriptorLast, -1);
// Allocate descriptor space
KeyDescriptorAlloc = sp.AllocateSpace(KeyDescriptorDef.DESCRIPTOR_CHUNK_SIZE, DEFS.POOL_KEY, generateID: false);
//Set initial values to memory object
KeyHeader.DescriptorAddress = KeyDescriptorAlloc.DescriptorAddress;
KeyHeader.DescriptorLength = KeyDescriptorDef.DESCRIPTOR_CHUNK_LENGTH;
KeyHeader.DescriptorLast = -1;
KeyHeader.DescriptorUsed = 0;
KeyHeader.LastKey = 0;
// Save initial values
KeyHeaderAlloc.Write(KeyHeaderDef.A_DescriptorAddress, KeyHeader.DescriptorAddress);
KeyHeaderAlloc.Write(KeyHeaderDef.A_DescriptorLength, KeyHeader.DescriptorLength);
KeyHeaderAlloc.Write(KeyHeaderDef.A_DescriptorLast, KeyHeader.DescriptorLast);
KeyHeaderAlloc.Write(KeyHeaderDef.A_DescriptorUsed, KeyHeader.DescriptorUsed);
KeyHeaderAlloc.Write(KeyHeaderDef.A_LastKey, KeyHeader.LastKey);
// Create descriptor
KeyDescriptor = new KeyDescriptorDef[KeyHeader.DescriptorLength];
}
else
{
// Read header
KeyHeader.DescriptorAddress = KeyHeaderAlloc.ReadLong(KeyHeaderDef.A_DescriptorAddress);
KeyHeader.DescriptorLength = KeyHeaderAlloc.ReadInt(KeyHeaderDef.A_DescriptorLength);
KeyHeader.DescriptorLast = KeyHeaderAlloc.ReadInt(KeyHeaderDef.A_DescriptorLast);
KeyHeader.DescriptorUsed = KeyHeaderAlloc.ReadInt(KeyHeaderDef.A_DescriptorUsed);
KeyHeader.LastKey = KeyHeaderAlloc.ReadLong(KeyHeaderDef.A_LastKey);
// Read descriptor
KeyDescriptor = new KeyDescriptorDef[KeyHeader.DescriptorLength];
KeyDescriptorAlloc = sp.GetAllocationByDescriptor(KeyHeader.DescriptorAddress);
for (int i = 0; i < KeyHeader.DescriptorLength; i++)
{
KeyDescriptor[i].Address = KeyDescriptorAlloc.ReadLong((KeyDescriptorDef.DESCRIPTOR_ITEM_LENGTH * i) + KeyDescriptorDef.A_Address);
KeyDescriptor[i].FirstKey = KeyDescriptorAlloc.ReadLong((KeyDescriptorDef.DESCRIPTOR_ITEM_LENGTH * i) + KeyDescriptorDef.A_FirstKey);
KeyDescriptor[i].Used = KeyDescriptorAlloc.ReadInt((KeyDescriptorDef.DESCRIPTOR_ITEM_LENGTH * i) + KeyDescriptorDef.A_Used);
}
}
}
public VSFreeSpaceManager(VSpace _sp)
{
Space = _sp;
vm = Space.VM;
long hdr_address = Space.GetFirstAddress(DEFS.POOL_FREE_SPACE);
if (hdr_address == 0)
{ // Initialization
// 1. Create H-block (header)
H_Object = new VSAllocation(vm, DEFS.FBQE_HEADER_ADDRESS, DEFS.FBQE_HEADER_LENGTH_FULL, 0);
H_Object.Write(0, DEFS.FBQE_HEADER_SIGNATURE);
this.MAX = DEFS.FBQE_ALLOCATION_NUMBER; // Max number of FBQE
this.FREE = MAX;
this.FIRST = -1;
this.LAST = -1;
this.FIRST_Q = 0;
this.LAST_Q = FREE - 1;
// 2. Save H-block address (1st object)
Space.SetFirstAddress(DEFS.POOL_FREE_SPACE, H_Object.DescriptorAddress); // 1st object
// 3. Create 1st FBQE block
F_Object = new VSAllocation(vm, H_Object.DescriptorAddress + H_Object.FullLength, (DEFS.FBQE_ALLOCATION_LENGTH + DEFS.BaseDescriptorLength), 0);
// 4. Set initial size
F_Object.SetSize(DEFS.FBQE_ALLOCATION_LENGTH);
buffer = new byte[F_Object.Size]; // Create buffer
// 5. Set references
F_Object.PREV = H_Object.DescriptorAddress;
H_Object.NEXT = F_Object.DescriptorAddress; // Address of the 1st block F-block
// 6. Save F-block address (last object)
Space.SetLastAddress(DEFS.POOL_FREE_SPACE, F_Object.DescriptorAddress); //last object
// 1.3 Initiate Free queue
for (int i = 0; i < FREE; i++)
{
CreateFBQE(i);
}
BuildBTrees();
// 1.4 Create initial FBQE
long fa = F_Object.DescriptorAddress + F_Object.FullLength; // 1st free address
AddFBQE(fa, (Space.vm.Size - fa), -1, -1); // Create 1st FBQE
}
else
{
H_Object = Space.GetAllocationByDescriptor(hdr_address);
F_Object = Space.GetAllocationByDescriptor(H_Object.NEXT);
byte[] b = H_Object.ReadBytes(0, FBQE_HEADER_LENGTH);
this.v_MAX = VSLib.ConvertByteToInt(VSLib.GetByteArray(b, MAX_POS, MAX_LEN));
this.v_FREE = VSLib.ConvertByteToInt(VSLib.GetByteArray(b, FREE_POS, FREE_LEN));
this.v_FIRST = VSLib.ConvertByteToInt(VSLib.GetByteArray(b, FIRST_POS, FIRST_LEN));
this.v_LAST = VSLib.ConvertByteToInt(VSLib.GetByteArray(b, LAST_POS, LAST_LEN));
this.v_FIRST_Q = VSLib.ConvertByteToInt(VSLib.GetByteArray(b, FIRST_Q_POS, FIRST_Q_LEN));
this.v_LAST_Q = VSLib.ConvertByteToInt(VSLib.GetByteArray(b, LAST_Q_POS, LAST_Q_LEN));
buffer = F_Object.ReadBytes(0, F_Object.Size); // Read buffer
BuildBTrees();
}
}
/// <summary>
/// Get/set pool descriptot address (first or last)
/// </summary>
/// <param name="pool"></param>
/// <param name="op">0 - read; 1 - write</param>
/// <param name="n">0 - first; 1 - last</param>
/// <param name="value">optional. of op=1 only</param>
/// <returns></returns>
private long PoolDescriptorAddressIO(int pool, int op, int n, long value = 0)
{
long offs = (n == 0) ? 0 : 8; // Offset in the descriptor
long addr = 0;
if (pool < DEFS.POOL_MIN_USER_DEFINED)
{ // System pool
if (Math.Abs(pool) >= DEFS.SYSTEM_POOL_DESCRIPTOR_NUMBER)
{
throw new VSException(DEFS.E0012_INVALID_POOL_NUMBER_CODE, "- " + pool.ToString());
}
addr = DEFS.SYSTEM_POOL_AREA_ADDRESS + (long)(Math.Abs(pool) * DEFS.SYSTEM_POOL_DESCRIPTOR_LENGTH + offs);
if (op == 0)
{
return(vm.ReadLong(addr));
}
else
{
vm.Write(addr, value);
return(0);
}
}
else if (pool < DEFS.POOL_MIN_DYNAMIC)
{ // User-defined
addr = (pool - DEFS.POOL_MIN_USER_DEFINED) * DEFS.SYSTEM_POOL_DESCRIPTOR_LENGTH + offs;
while (addr >= A_POOL_USER_DEFINED.Size)
{
ExtendSpace(A_POOL_USER_DEFINED, DEFS.ALLOCATION_USER_DEFINED); // Extend if needed
}
if (op == 0)
{
return(A_POOL_USER_DEFINED.ReadLong(addr));
}
else
{
A_POOL_USER_DEFINED.Write(addr, value);
return(0);
}
}
else
{ // Dynamic
addr = (pool - DEFS.POOL_MIN_DYNAMIC) * DEFS.SYSTEM_POOL_DESCRIPTOR_LENGTH + offs;
while (addr >= A_POOL_DYNAMIC.Size)
{
ExtendSpace(A_POOL_USER_DEFINED, DEFS.ALLOCATION_DYNAMIC); // Extend if needed
}
if (op == 0)
{
return(A_POOL_DYNAMIC.ReadLong(addr));
}
else
{
A_POOL_DYNAMIC.Write(addr, value);
return(0);
}
}
}
/// <summary>
/// Create new KEY for address
/// If use_key > 0 then add specified key (used by restore)
/// If alloc=null - add 0 address (restore)
/// </summary>
/// <returns>new SID</returns>
public long Add(VSAllocation alloc, long use_key = 0)
{
//VSDebug.StopPoint(alloc.Address, 45724);
long address = (alloc == null) ? 0 : alloc.DescriptorAddress;
long addr = 0;
// 1. Generate new key
if (use_key > 0)
{
if (use_key <= KeyHeader.LastKey)
{
throw new VSException(DEFS.E0023_INVALID_KEY_SEQUENCE_CODE, " Lask key: " + KeyHeader.LastKey.ToString() + " Use key: " + use_key.ToString());
}
KeyHeader.LastKey = use_key;
}
else
{
KeyHeader.LastKey++;
}
// Write new key
KeyHeaderAlloc.Write(KeyHeaderDef.A_LastKey, KeyHeader.LastKey);
// Lookup place to add
KeyBlockAllocWrite = null;
if (KeyHeader.DescriptorLast >= 0)
{
if (KeyHeader.LastKey < (KeyDescriptor[KeyHeader.DescriptorLast].FirstKey + KeyBlockDef.BLOCK_LENGTH))
{
KeyBlockAllocWrite = sp.GetAllocationByDescriptor(KeyDescriptor[KeyHeader.DescriptorLast].Address);
}
}
// Not found, allocate new block
if (KeyBlockAllocWrite == null)
{
KeyBlockAllocWrite = sp.AllocateSpace(KeyBlockDef.BLOCK_SIZE, DEFS.POOL_KEY, generateID: false);
byte[] b = new byte[KeyBlockDef.BLOCK_SIZE];
// Fill all by -1
for (int i = 0; i < KeyBlockDef.BLOCK_SIZE; i++)
{
b[i] = 255;
}
KeyBlockAllocWrite.Write(0, b, b.Length);
KeyHeader.DescriptorLast++;
KeyHeader.DescriptorUsed++;
KeyHeaderAlloc.Write(KeyHeaderDef.A_DescriptorLast, KeyHeader.DescriptorLast);
KeyHeaderAlloc.Write(KeyHeaderDef.A_DescriptorUsed, KeyHeader.DescriptorUsed);
// Extend if required
if (KeyHeader.DescriptorLast == KeyHeader.DescriptorLength)
{
sp.Extend(KeyHeaderAlloc, KeyDescriptorDef.DESCRIPTOR_CHUNK_SIZE);
KeyHeader.DescriptorLength += KeyDescriptorDef.DESCRIPTOR_CHUNK_LENGTH;
KeyHeaderAlloc.Write(KeyHeaderDef.A_DescriptorLength, KeyHeader.DescriptorLength);
}
KeyDescriptor[KeyHeader.DescriptorLast].FirstKey = KeyHeader.LastKey;
KeyDescriptor[KeyHeader.DescriptorLast].Address = KeyBlockAllocWrite.DescriptorAddress;
KeyDescriptor[KeyHeader.DescriptorLast].Used = 0;
addr = KeyHeader.DescriptorLast * KeyDescriptorDef.DESCRIPTOR_ITEM_LENGTH;
KeyDescriptorAlloc.Write(addr + KeyDescriptorDef.A_Address, KeyDescriptor[KeyHeader.DescriptorLast].Address);
KeyDescriptorAlloc.Write(addr + KeyDescriptorDef.A_FirstKey, KeyDescriptor[KeyHeader.DescriptorLast].FirstKey);
}
// Write to block
KeyBlockAllocWrite = sp.GetAllocationByDescriptor(KeyDescriptor[KeyHeader.DescriptorLast].Address);
addr = ((KeyHeader.LastKey - KeyDescriptor[KeyHeader.DescriptorLast].FirstKey) * KeyBlockDef.BLOCK_ITEM_LENGTH);
KeyBlockAllocWrite.Write(addr + KeyBlockDef.A_Address, address);
// Update used
KeyDescriptor[KeyHeader.DescriptorLast].Used++;
KeyDescriptorAlloc.Write((KeyHeader.DescriptorLast * KeyDescriptorDef.DESCRIPTOR_ITEM_LENGTH) + KeyDescriptorDef.A_Used, KeyDescriptor[KeyHeader.DescriptorLast].Used);
// Set read cache
KeyBlockAllocRead = KeyBlockAllocWrite;
KeyBlockReadIndex = KeyHeader.DescriptorLast;
// Return key
return(KeyHeader.LastKey);
}
