public static BDbMethods GetMethods(BerkeleyDbType dbType)
{
BDbMethods methods = GetMethodsInternal(dbType);
if (methods == null)
{
throw new InvalidOperationException("must call DbMethods.Create");
}
return(methods);
}
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);
}
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 static BDbMethods CreateMethods(BerkeleyDbType dbType, IntPtr pdb, BDbOffsetOf offsetOf)
{
BDbMethods dbMethods = GetMethodsInternal(dbType);
if (dbMethods == null)
{
lock (typeof(BDbMethods))
{
dbMethods = GetMethodsInternal(dbType);
if (dbMethods == null)
{
dbMethods = new BDbMethods(pdb, offsetOf, dbType);
switch (dbType)
{
case BerkeleyDbType.DB_BTREE:
_btree = dbMethods;
break;
case BerkeleyDbType.DB_HASH:
_hash = dbMethods;
break;
case BerkeleyDbType.DB_RECNO:
_recno = dbMethods;
break;
case BerkeleyDbType.DB_QUEUE:
_queue = dbMethods;
break;
case BerkeleyDbType.DB_UNKNOWN:
_unknown = dbMethods;
break;
case BerkeleyDbType.DB_HEAP:
_heap = dbMethods;
break;
}
}
}
}
return(dbMethods);
}
private static BDbMethods CreateMethods(BerkeleyDbType dbType, IntPtr pdb, BDbOffsetOf offsetOf)
{
BDbMethods dbMethods = GetMethodsInternal(dbType);
if (dbMethods == null)
{
lock (typeof(BDbMethods))
{
dbMethods = GetMethodsInternal(dbType);
if (dbMethods == null)
{
dbMethods = new BDbMethods(pdb, offsetOf, dbType);
switch (dbType)
{
case BerkeleyDbType.DB_BTREE:
_btree = dbMethods;
break;
case BerkeleyDbType.DB_HASH:
_hash = dbMethods;
break;
case BerkeleyDbType.DB_RECNO:
_recno = dbMethods;
break;
case BerkeleyDbType.DB_QUEUE:
_queue = dbMethods;
break;
case BerkeleyDbType.DB_UNKNOWN:
_unknown = dbMethods;
break;
case BerkeleyDbType.DB_HEAP:
_heap = dbMethods;
break;
}
}
}
}
return dbMethods;
}
public DbHandle(IntPtr pdb, BDbMethods methods)
{
Handle = pdb;
Methods = methods;
}