diff options
Diffstat (limited to 'src/include/storage/proc.h')
| -rw-r--r-- | src/include/storage/proc.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/src/include/storage/proc.h b/src/include/storage/proc.h index 3441288dd06..66ab255f4c6 100644 --- a/src/include/storage/proc.h +++ b/src/include/storage/proc.h @@ -155,6 +155,15 @@ struct PGPROC bool fpVXIDLock; /* are we holding a fast-path VXID lock? */ LocalTransactionId fpLocalTransactionId; /* lxid for fast-path VXID * lock */ + + /* + * Support for lock groups. Use LockHashPartitionLockByProc to get the + * LWLock protecting these fields. + */ + int lockGroupLeaderIdentifier; /* MyProcPid, if I'm a leader */ + PGPROC *lockGroupLeader; /* lock group leader, if I'm a follower */ + dlist_head lockGroupMembers; /* list of members, if I'm a leader */ + dlist_node lockGroupLink; /* my member link, if I'm a member */ }; /* NOTE: "typedef struct PGPROC PGPROC" appears in storage/lock.h. */ @@ -272,4 +281,7 @@ extern void LockErrorCleanup(void); extern void ProcWaitForSignal(void); extern void ProcSendSignal(int pid); +extern void BecomeLockGroupLeader(void); +extern bool BecomeLockGroupMember(PGPROC *leader, int pid); + #endif /* PROC_H */ |