85 lines
2.8 KiB
C
85 lines
2.8 KiB
C
/*
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* Copyright (c) 2020 Huawei Technologies Co.,Ltd.
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*
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* openGauss is licensed under Mulan PSL v2.
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* You can use this software according to the terms and conditions of the Mulan PSL v2.
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* You may obtain a copy of Mulan PSL v2 at:
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*
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* http://license.coscl.org.cn/MulanPSL2
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*
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* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
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* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
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* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
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* See the Mulan PSL v2 for more details.
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* ---------------------------------------------------------------------------------------
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*
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* datasender_private.h
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* Private definitions from replication/datasender.cpp.
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*
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*
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* IDENTIFICATION
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* src/include/replication/datasender_private.h
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*
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* ---------------------------------------------------------------------------------------
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*/
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#ifndef _DATASENDER_PRIVATE_H
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#define _DATASENDER_PRIVATE_H
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#include "nodes/nodes.h"
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#include "replication/syncrep.h"
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#include "replication/walsender_private.h"
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#include "replication/repl_gramparse.h"
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#include "storage/latch.h"
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#include "storage/shmem.h"
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#include "storage/spin.h"
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#include "postgres.h"
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#include "knl/knl_variable.h"
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typedef enum DataSndState { DATASNDSTATE_STARTUP = 0, DATASNDSTATE_CATCHUP, DATASNDSTATE_STREAMING } DataSndState;
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/*
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* Each datasender has a DataSnd struct in shared memory.
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*/
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typedef struct DataSnd {
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ThreadId pid; /* this datasender's process id, or 0 */
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int lwpId;
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DataSndState state; /* this datasender's state */
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TimestampTz catchupTime[2]; /* time stamp of this datasender's catchup */
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SndRole sendRole; /* role of sender */
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bool sendKeepalive; /* do we send keepalives on this connection? */
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bool sending; /* true if sending to standby/dummystandby */
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DataQueuePtr sendPosition; /* data in queue has been sent up to this position */
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DataQueuePtr receivePosition; /* receiver received queue position */
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/* Protects shared variables shown above. */
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slock_t mutex;
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/*
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* Latch used by backends to wake up this datasender when it has work to
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* do.
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*/
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Latch latch;
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} DataSnd;
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/* There is one DataSndCtl struct for the whole database cluster */
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typedef struct DataSndCtlData {
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/*
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* Synchronous replication queue with one queue per request type.
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* Protected by SyncRepLock.
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*/
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SHM_QUEUE SyncRepQueue;
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/* the queue_offset is to release the waiting queue and transaction */
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DataQueuePtr queue_offset;
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/* Protects shared variables of all datalsnd */
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slock_t mutex;
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DataSnd datasnds[FLEXIBLE_ARRAY_MEMBER]; /* VARIABLE LENGTH ARRAY */
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} DataSndCtlData;
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extern void DataSndSetState(DataSndState state);
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#endif /* _DATASENDER_PRIVATE_H */
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