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>
/// Dump storage
/// Space name - 32
/// System area - 1024
/// Pool area - 4096
/// </summary>
private void dump(VSIO IO, string name)
{
bool was_opened = false;
uint e_code = IO.GetEncryption() ? e_code = DEFS.DATA_ENCRYPTED : e_code = DEFS.DATA_NOT_ENCRYPTED;
if (state == DEFS.STATE_OPENED)
{
if (TA.Started)
{
throw new VSException(DEFS.E0025_STORAGE_UNABLE_TO_COMPLETE_CODE, "- Dump (transaction is in progress)");
}
was_opened = true;
}
else
{
Open(null);
}
string[] spaces = this.GetSpaceList();
bool encr = IO.GetEncryption();
IO.SetEncryption(false);
IO.Write(0, e_code); // + 0 (4)Encryption indicator
IO.SetEncryption(encr);
IO.Write(-1, DEFS.DUMP_SIGNATURE_INCOMPLETE); // + 4 (4) Signature 'incomplete'
IO.Write(-1, (int)0); // + 8 (4) CRC placeholder
IO.Write(-1, (long)0); // +12 (8)Total length
for (int sp_index = 0; sp_index < spaces.Length; sp_index++)
{
VSpace sp = GetSpace(spaces[sp_index]);
VSVirtualMemoryManager vm = GetVM(spaces[sp_index]);
if ((name == "") | (VSLib.Compare(name, sp.Name)))
{
long sp_hdr_pos = IO.GetPosition(); // Position for header(number of bytes)
IO.Write(-1, (long)0);
// Save space header
IO.Write(-1, (short)sp.Name.Length); // Space neme length (short)
IO.Write(-1, sp.Name); // Space name
IO.Write(-1, (short)sp.Owner.Length); // Space owner length (short)
IO.Write(-1, sp.Owner); // Space owner
//////////////////////////////////////////////////////////////
// Save keys
//////////////////////////////////////////////////////////////
IO.Write(-1, DEFS.DUMP_KEYS_SIGNATURE); // Start keys
VSKeyManager kh = sp.KeyManager;
kh.Reset();
while (kh.Next())
{
long k = kh.Current;
IO.Write(-1, k);
}
IO.Write(-1, (long)-1); // End keys
// Save pool ares (starting from 2)
short[] pools = sp.GetPoolsForDump(); // Create list of pools
for (int i = 0; i < pools.Length; i++)
{
long a_desc = sp.GetFirstAddress(pools[i]);
while (a_desc > 0)
{
VSAllocation a = sp.GetAllocationByDescriptor(a_desc);
//////////// Save ADSC fields ///////////
IO.Write(-1, a.Id);
IO.Write(-1, a.Pool);
IO.Write(-1, (a.Chunk == 0) ? a.Length : a.Size); // Memory size
IO.Write(-1, a.ChunkSize); // Chunk sizeMemory size
IO.Write(-1, a.ALLOC); // Alloc version (object)
IO.Write(-1, a.FIXED); // Fixed part (object)
//////////// Save data //////////////////
byte[] b = vm.ReadBytes(a.Address, a.Length);
IO.Write(-1, ref b);
a_desc = a.NEXT;
if (a.Chunk != 0)
{
while (a_desc != 0)
{
a = sp.GetAllocationByDescriptor(a_desc);
if ((a.Chunk == 0) | (a.Chunk == 1))
{
break;
}
b = vm.ReadBytes(a.Address, a.Length);
IO.Write(-1, ref b);
a_desc = a.NEXT;
}
}
}
}
long sp_count = IO.GetPosition() - sp_hdr_pos; // Calculate count
long current_pos = IO.GetPosition(); // Save current position
IO.Write(sp_hdr_pos, sp_count); // Write count to the header (incl hdr)
IO.SetPosition(current_pos); // Restore position
}
}
IO.Write(-1, (long)-1); // Write eof indicator
IO.Write(12, (long)IO.GetLength()); // + 8 (8) - Total length
IO.Flush();
uint c = IO.GetCRC32(12, -1); // calculate CRC32
IO.Write(8, c); // + 4 (4) - CRC32
IO.Write(4, DEFS.DUMP_SIGNATURE); // Signature 'complete'
IO.Flush();
if (!was_opened)
{
Close();
}
}
