private BDbcMethods(IntPtr pdbc, BDbOffsetOf offsetOf, BerkeleyDbType dbType)
{
_offsetOf = offsetOf;
_dbType = dbType;
foreach (BDbOffsetOfItem offsetOfItem in offsetOf.Dbc)
{
IntPtr funcptr = Marshal.ReadIntPtr(pdbc + offsetOfItem.Offset);
switch (offsetOfItem.Name)
{
case "close":
_close = (close)Marshal.GetDelegateForFunctionPointer(funcptr, typeof(close));
break;
case "del":
_del = (del)Marshal.GetDelegateForFunctionPointer(funcptr, typeof(del));
break;
case "get":
_get = (get)Marshal.GetDelegateForFunctionPointer(funcptr, typeof(get));
break;
case "put":
_put = (put)Marshal.GetDelegateForFunctionPointer(funcptr, typeof(put));
break;
}
}
}
public static BerkeleyDbError Create(BDbOffsetOf offsetOf, out IntPtr pdbenv)
{
var error = (BerkeleyDbError)env_create(out pdbenv, 0);
if (error == 0)
{
CreateMethods(pdbenv, offsetOf);
}
return(error);
}
public static BerkeleyDbError Create(BDbOffsetOf offsetOf, IntPtr pdb, BerkeleyDbType dbType, BerkeleyDbCursorFlags flags, out IntPtr pdbc)
{
BDbMethods dbMethods = BDbMethods.GetMethods(dbType);
BerkeleyDbError error = dbMethods.Cursor(pdb, flags, out pdbc);
if (error == 0)
{
CreateMethods(dbType, pdbc, offsetOf);
}
return(error);
}
private static BDbenvMethods CreateMethods(IntPtr pdbenv, BDbOffsetOf offsetOf)
{
if (_methods == null)
{
lock (typeof(BDbenvMethods))
{
if (_methods == null)
{
_methods = new BDbenvMethods(pdbenv, offsetOf.Dbenv);
}
}
}
return(_methods);
}
private static BDbcMethods CreateMethods(BerkeleyDbType dbType, IntPtr pdbc, BDbOffsetOf offsetOf)
{
BDbcMethods dbcMethods = GetMethodsInternal(dbType);
if (dbcMethods == null)
{
lock (typeof(BDbcMethods))
{
dbcMethods = GetMethodsInternal(dbType);
if (dbcMethods == null)
{
dbcMethods = new BDbcMethods(pdbc, offsetOf, dbType);
switch (dbType)
{
case BerkeleyDbType.DB_BTREE:
_btree = dbcMethods;
break;
case BerkeleyDbType.DB_HASH:
_hash = dbcMethods;
break;
case BerkeleyDbType.DB_RECNO:
_recno = dbcMethods;
break;
case BerkeleyDbType.DB_QUEUE:
_queue = dbcMethods;
break;
case BerkeleyDbType.DB_UNKNOWN:
_unknown = dbcMethods;
break;
case BerkeleyDbType.DB_HEAP:
_heap = dbcMethods;
break;
}
}
}
}
return(dbcMethods);
}
public static BDbOffsetOf SetInstance(BDbOffsetOf offsetOf)
{
if (_instance != null)
{
throw new InvalidOperationException("OffsetOf already created");
}
lock (typeof(BDbOffsetOf))
{
if (_instance != null)
{
throw new InvalidOperationException("OffsetOf already created");
}
_instance = offsetOf;
}
return(_instance);
}
public static BerkeleyDbError Create(BDbOffsetOf offsetOf, IntPtr penv, BerkeleyDbType dbType, BerkeleyDbFlags flags, out IntPtr pdb)
{
var error = (BerkeleyDbError)db_create(out pdb, penv, 0);
if (error != 0)
{
return(error);
}
BDbMethods methods = CreateMethods(dbType, pdb, offsetOf);
error = (BerkeleyDbError)methods.SetFlags(pdb, flags);
if (error != 0 && pdb != IntPtr.Zero)
{
methods.Close(pdb, 0);
pdb = IntPtr.Zero;
}
return(error);
}
private BDbMethods(IntPtr pdb, BDbOffsetOf offsetOf, BerkeleyDbType dbType)
{
_dbType = dbType;
_offsetOf = offsetOf;
foreach (BDbOffsetOfItem offsetOfItem in offsetOf.Db)
{
IntPtr funcptr = Marshal.ReadIntPtr(pdb + offsetOfItem.Offset);
switch (offsetOfItem.Name)
{
case "close":
_close = (close)Marshal.GetDelegateForFunctionPointer(funcptr, typeof(close));
break;
case "cursor":
_cursor = (cursor)Marshal.GetDelegateForFunctionPointer(funcptr, typeof(cursor));
break;
case "del":
_del = (del)Marshal.GetDelegateForFunctionPointer(funcptr, typeof(del));
break;
case "get_pagesize":
_get_pagesize = (get_pagesize)Marshal.GetDelegateForFunctionPointer(funcptr, typeof(get_pagesize));
break;
case "open":
_open = (open)Marshal.GetDelegateForFunctionPointer(funcptr, typeof(open));
break;
case "put":
_put = (put)Marshal.GetDelegateForFunctionPointer(funcptr, typeof(put));
break;
case "set_flags":
_set_flags = (set_flags)Marshal.GetDelegateForFunctionPointer(funcptr, typeof(set_flags));
break;
}
}
}
