| /*------------------------------------------------------------------------- |
| * |
| * walsendserver.c |
| * Process under QD postmaster that manages sending WAL to the standby. |
| * |
| * |
| * 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. |
| * |
| *------------------------------------------------------------------------- |
| */ |
| #ifndef WALSENDSERVER_H |
| #define WALSENDSERVER_H |
| |
| #include "access/xlogdefs.h" |
| |
| typedef enum WalSendRequestCommand |
| { |
| PositionToEnd = 0, |
| Catchup, |
| WriteWalPages, |
| FlushWalPages, |
| CloseForShutdown, |
| MaxWalSendRequestCommand /* must always be last */ |
| } WalSendRequestCommand; |
| |
| typedef struct WalSendRequest |
| { |
| WalSendRequestCommand command; |
| |
| /* |
| * Data for WriteWalPages. |
| */ |
| int startidx; /* Index to the start page the in WAL buffer pool */ |
| int npages; /* Number of pages to write */ |
| |
| TimeLineID timeLineID; |
| uint32 logId; |
| uint32 logSeg; |
| uint32 logOff; |
| bool haveNewCheckpointLocation; |
| XLogRecPtr newCheckpointLocation; |
| |
| /* |
| * Data for MirrorQDEnabled. |
| */ |
| XLogRecPtr flushedLocation; |
| } WalSendRequest; |
| |
| typedef struct WalSendResponse |
| { |
| bool ok; |
| |
| } WalSendResponse; |
| |
| extern int walsendserver_start(void); |
| extern bool IsWalSendProcess(void); |
| |
| extern void WalSendServerShmemInit(void); |
| extern int WalSendServerShmemSize(void); |
| extern void WalSendServerGetClientTimeout(struct timeval *timeout); |
| extern bool WalSendServerClientConnect(bool complain); |
| extern bool WalSendServerClientSendRequest(WalSendRequest* walSendRequest); |
| extern bool WalSendServerClientReceiveResponse(WalSendResponse* walSendResponse, struct timeval *timeout); |
| extern char* WalSendRequestCommandToString(WalSendRequestCommand command); |
| |
| |
| #endif /* WALSENDSERVER_H */ |
| |