davidhcoe commented on code in PR #697: URL: https://github.com/apache/arrow-adbc/pull/697#discussion_r1218462987
########## csharp/src/Apache.Arrow.Adbc/Core/Interop.cs: ########## @@ -0,0 +1,694 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +using System; +using System.Buffers; +using System.Collections.Generic; +using System.Diagnostics; +using System.Runtime.InteropServices; +using Apache.Arrow.Adbc.Interop; +using Apache.Arrow.C; +using static System.Net.Mime.MediaTypeNames; + +#if NETSTANDARD +using Apache.Arrow.Adbc.Extensions; +#endif + +namespace Apache.Arrow.Adbc.Core +{ + internal static class AdbcInterop + { + private unsafe static readonly NativeDelegate<ErrorRelease> releaseError = new NativeDelegate<ErrorRelease>(ReleaseError); + private unsafe static readonly NativeDelegate<DriverRelease> releaseDriver = new NativeDelegate<DriverRelease>(ReleaseDriver); + + private unsafe static readonly NativeDelegate<DatabaseFn> databaseInit = new NativeDelegate<DatabaseFn>(InitDatabase); + private unsafe static readonly NativeDelegate<DatabaseFn> databaseRelease = new NativeDelegate<DatabaseFn>(ReleaseDatabase); + private unsafe static readonly NativeDelegate<DatabaseSetOption> databaseSetOption = new NativeDelegate<DatabaseSetOption>(SetDatabaseOption); + + private unsafe static readonly NativeDelegate<ConnectionInit> connectionInit = new NativeDelegate<ConnectionInit>(InitConnection); + private unsafe static readonly NativeDelegate<ConnectionFn> connectionRelease = new NativeDelegate<ConnectionFn>(ReleaseConnection); + private unsafe static readonly NativeDelegate<ConnectionGetInfo> connectionGetInfo = new NativeDelegate<ConnectionGetInfo>(GetConnectionInfo); + private unsafe static readonly NativeDelegate<ConnectionSetOption> connectionSetOption = new NativeDelegate<ConnectionSetOption>(SetConnectionOption); + + private unsafe static readonly NativeDelegate<StatementExecuteQuery> statementExecuteQuery = new NativeDelegate<StatementExecuteQuery>(ExecuteStatementQuery); + private unsafe static readonly NativeDelegate<StatementNew> statementNew = new NativeDelegate<StatementNew>(NewStatement); + private unsafe static readonly NativeDelegate<StatementFn> statementRelease = new NativeDelegate<StatementFn>(ReleaseStatement); + private unsafe static readonly NativeDelegate<StatementSetSqlQuery> statementSetSqlQuery = new NativeDelegate<StatementSetSqlQuery>(SetStatementSqlQuery); + + public unsafe static AdbcStatusCode AdbcDriverInit(int version, NativeAdbcDriver* nativeDriver, NativeAdbcError* error, AdbcDriver driver) + { + DriverStub stub = new DriverStub(driver); + GCHandle handle = GCHandle.Alloc(stub); + nativeDriver->private_data = (void*)GCHandle.ToIntPtr(handle); + nativeDriver->release = (delegate* unmanaged[Stdcall]<NativeAdbcDriver*, NativeAdbcError*, AdbcStatusCode>)releaseDriver.Pointer; + + nativeDriver->DatabaseInit = (delegate* unmanaged[Stdcall]<NativeAdbcDatabase*, NativeAdbcError*, AdbcStatusCode>)databaseInit.Pointer; + nativeDriver->DatabaseNew = (delegate* unmanaged[Stdcall]<NativeAdbcDatabase*, NativeAdbcError*, AdbcStatusCode>)stub.newDatabase.Pointer; + nativeDriver->DatabaseSetOption = (delegate* unmanaged[Stdcall]<NativeAdbcDatabase*, byte*, byte*, NativeAdbcError*, AdbcStatusCode>) databaseSetOption.Pointer; + nativeDriver->DatabaseRelease = (delegate* unmanaged[Stdcall]<NativeAdbcDatabase*, NativeAdbcError*, AdbcStatusCode>)databaseRelease.Pointer; + + nativeDriver->ConnectionCommit = (delegate* unmanaged[Stdcall]<NativeAdbcConnection*, NativeAdbcError*, AdbcStatusCode>)connectionRelease.Pointer; + //nativeDriver->ConnectionGetInfo = (delegate* unmanaged[Stdcall]<NativeAdbcConnection *, int*, int, CArrowArrayStream*, NativeAdbcError*, AdbcStatusCode>)connectionGetInfo.Pointer; + //nativeDriver->ConnectionGetTableSchema = null; + //nativeDriver->ConnectionGetTableTypes = null; + nativeDriver->ConnectionInit = (delegate* unmanaged[Stdcall]<NativeAdbcConnection*, NativeAdbcDatabase*, NativeAdbcError*, AdbcStatusCode>)connectionInit.Pointer; + nativeDriver->ConnectionNew = (delegate* unmanaged[Stdcall]<NativeAdbcConnection*, NativeAdbcError*, AdbcStatusCode>)stub.newConnection.Pointer; + nativeDriver->ConnectionSetOption = (delegate* unmanaged[Stdcall]<NativeAdbcConnection*, byte*, byte*, NativeAdbcError*, AdbcStatusCode>)connectionSetOption.Pointer; + //nativeDriver->ConnectionReadPartition = null; + nativeDriver->ConnectionRelease = (delegate* unmanaged[Stdcall]<NativeAdbcConnection*, NativeAdbcError*, AdbcStatusCode>)connectionRelease.Pointer; + //nativeDriver->ConnectionRollback = null; + + // nativeDriver->StatementBind = (delegate* unmanaged[Stdcall]<NativeAdbcStatement*, CArrowArray*, CArrowSchema*, NativeAdbcError*, AdbcStatusCode>) + nativeDriver->StatementNew = (delegate* unmanaged[Stdcall]<NativeAdbcConnection*, NativeAdbcStatement*, NativeAdbcError*, AdbcStatusCode>)statementNew.Pointer; + nativeDriver->StatementSetSqlQuery = (delegate* unmanaged[Stdcall]<NativeAdbcStatement*, byte*, NativeAdbcError *, AdbcStatusCode >)statementSetSqlQuery.Pointer; + nativeDriver->StatementExecuteQuery = (delegate* unmanaged[Stdcall]<NativeAdbcStatement*, CArrowArrayStream*, long*, NativeAdbcError*, AdbcStatusCode>)statementExecuteQuery.Pointer; + nativeDriver->StatementPrepare = (delegate* unmanaged[Stdcall]<NativeAdbcStatement*, NativeAdbcError*, AdbcStatusCode>)statementRelease.Pointer; + nativeDriver->StatementRelease = (delegate* unmanaged[Stdcall]<NativeAdbcStatement*, NativeAdbcError*, AdbcStatusCode>)statementRelease.Pointer; + + return 0; + } + + private unsafe static void ReleaseError(NativeAdbcError* error) + { + if (error != null && ((IntPtr)error->message) != IntPtr.Zero) + { + Marshal.FreeCoTaskMem((IntPtr)error->message); Review Comment: switched to FreeHGlobal -- This is an automated message from the Apache Git Service. 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