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Remove STATUS_WAITING

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Add a separate enum for use in the locking APIs, which were the only
user.

Discussion: https://www.postgresql.org/message-id/flat/a6f91ead-0ce4-2a34-062b-7ab9813ea308%402ndquadrant.com
This commit is contained in:
Peter Eisentraut
2020-06-17 09:14:37 +02:00
parent 42aa1f0ab3
commit a513f1dfbf
5 changed files with 38 additions and 32 deletions
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13
src/include/storage/proc.h
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@@ -76,6 +76,13 @@ struct XidCache
*/
#define INVALID_PGPROCNO PG_INT32_MAX
typedef enum
{
PROC_WAIT_STATUS_OK,
PROC_WAIT_STATUS_WAITING,
PROC_WAIT_STATUS_ERROR,
} ProcWaitStatus;
/*
* Each backend has a PGPROC struct in shared memory. There is also a list of
* currently-unused PGPROC structs that will be reallocated to new backends.
@@ -99,7 +106,7 @@ struct PGPROC
PGPROC **procgloballist; /* procglobal list that owns this PGPROC */
PGSemaphore sem; /* ONE semaphore to sleep on */
int waitStatus; /* STATUS_WAITING, STATUS_OK or STATUS_ERROR */
ProcWaitStatus waitStatus;
Latch procLatch; /* generic latch for process */
@@ -315,8 +322,8 @@ extern bool HaveNFreeProcs(int n);
extern void ProcReleaseLocks(bool isCommit);
extern void ProcQueueInit(PROC_QUEUE *queue);
extern int ProcSleep(LOCALLOCK *locallock, LockMethod lockMethodTable);
extern PGPROC *ProcWakeup(PGPROC *proc, int waitStatus);
extern ProcWaitStatus ProcSleep(LOCALLOCK *locallock, LockMethod lockMethodTable);
extern PGPROC *ProcWakeup(PGPROC *proc, ProcWaitStatus waitStatus);
extern void ProcLockWakeup(LockMethod lockMethodTable, LOCK *lock);
extern void CheckDeadLockAlert(void);
extern bool IsWaitingForLock(void);