63 lines
2.3 KiB
C
63 lines
2.3 KiB
C
/*
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* Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
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*
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* This program is free software: you can use, redistribute, and/or modify
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* it under the terms of the GNU Affero General Public License, version 3
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* or later ("AGPL"), as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _TD_LIBS_SYNC_COMMIT_H
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#define _TD_LIBS_SYNC_COMMIT_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "syncInt.h"
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// \* Leader i advances its commitIndex.
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// \* This is done as a separate step from handling AppendEntries responses,
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// \* in part to minimize atomic regions, and in part so that leaders of
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// \* single-server clusters are able to mark entries committed.
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// AdvanceCommitIndex(i) ==
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// /\ state[i] = Leader
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// /\ LET \* The set of servers that agree up through index.
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// Agree(index) == {i} \cup {k \in Server :
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// matchIndex[i][k] >= index}
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// \* The maximum indexes for which a quorum agrees
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// agreeIndexes == {index \in 1..Len(log[i]) :
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// Agree(index) \in Quorum}
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// \* New value for commitIndex'[i]
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// newCommitIndex ==
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// IF /\ agreeIndexes /= {}
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// /\ log[i][Max(agreeIndexes)].term = currentTerm[i]
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// THEN
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// Max(agreeIndexes)
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// ELSE
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// commitIndex[i]
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// IN commitIndex' = [commitIndex EXCEPT ![i] = newCommitIndex]
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// /\ UNCHANGED <<messages, serverVars, candidateVars, leaderVars, log>>
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//
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void syncOneReplicaAdvance(SSyncNode* pSyncNode);
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void syncMaybeAdvanceCommitIndex(SSyncNode* pSyncNode);
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bool syncNodeAgreedUpon(SSyncNode* pNode, SyncIndex index);
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int64_t syncNodeUpdateCommitIndex(SSyncNode* ths, SyncIndex commitIndex);
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int64_t syncNodeCheckCommitIndex(SSyncNode* ths, SyncIndex indexLikely);
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int64_t syncNodeUpdateAssignedCommitIndex(SSyncNode* ths, SyncIndex assignedCommitIndex);
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#ifdef __cplusplus
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}
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#endif
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#endif /*_TD_LIBS_SYNC_COMMIT_H*/
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