diff options
Diffstat (limited to 'src/include/storage')
| -rw-r--r-- | src/include/storage/buf_internals.h | 2 | ||||
| -rw-r--r-- | src/include/storage/lwlock.h | 8 | ||||
| -rw-r--r-- | src/include/storage/proc.h | 2 |
3 files changed, 10 insertions, 2 deletions
diff --git a/src/include/storage/buf_internals.h b/src/include/storage/buf_internals.h index a17e7b2..dbb0aef 100644 --- a/src/include/storage/buf_internals.h +++ b/src/include/storage/buf_internals.h @@ -150,7 +150,7 @@ typedef struct buftag * is held. Thus buffer header lock holder can do complex updates of the * state variable in single write, simultaneously with lock release (cleaning * BM_LOCKED flag). On the other hand, updating of state without holding - * buffer header lock is restricted to CAS, which insure that BM_LOCKED flag + * buffer header lock is restricted to CAS, which ensures that BM_LOCKED flag * is not set. Atomic increment/decrement, OR/AND etc. are not allowed. * * An exception is that if we have the buffer pinned, its tag can't change diff --git a/src/include/storage/lwlock.h b/src/include/storage/lwlock.h index e03d317..d88fa4b 100644 --- a/src/include/storage/lwlock.h +++ b/src/include/storage/lwlock.h @@ -23,6 +23,14 @@ struct PGPROC; +/* what state of the wait process is a backend in */ +typedef enum LWLockWaitState +{ + LW_WS_NOT_WAITING, /* not currently waiting / woken up */ + LW_WS_WAITING, /* currently waiting */ + LW_WS_PENDING_WAKEUP /* removed from waitlist, but not yet signalled */ +} LWLockWaitState; + /* * Code outside of lwlock.c should not manipulate the contents of this * structure directly, but we have to declare it here to allow LWLocks to be diff --git a/src/include/storage/proc.h b/src/include/storage/proc.h index 2579e61..2ea7730 100644 --- a/src/include/storage/proc.h +++ b/src/include/storage/proc.h @@ -211,7 +211,7 @@ struct PGPROC bool recoveryConflictPending; /* Info about LWLock the process is currently waiting for, if any. */ - bool lwWaiting; /* true if waiting for an LW lock */ + uint8 lwWaiting; /* see LWLockWaitState */ uint8 lwWaitMode; /* lwlock mode being waited for */ proclist_node lwWaitLink; /* position in LW lock wait list */ |