diff options
Diffstat (limited to 'src/backend/storage/ipc/sinval.c')
| -rw-r--r-- | src/backend/storage/ipc/sinval.c | 31 |
1 files changed, 29 insertions, 2 deletions
diff --git a/src/backend/storage/ipc/sinval.c b/src/backend/storage/ipc/sinval.c index 6a3129ffd56..5794207eb18 100644 --- a/src/backend/storage/ipc/sinval.c +++ b/src/backend/storage/ipc/sinval.c @@ -8,7 +8,7 @@ * * * IDENTIFICATION - * $Header: /cvsroot/pgsql/src/backend/storage/ipc/sinval.c,v 1.34 2001/06/19 19:42:15 tgl Exp $ + * $Header: /cvsroot/pgsql/src/backend/storage/ipc/sinval.c,v 1.35 2001/07/06 21:04:26 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -16,7 +16,6 @@ #include <sys/types.h> -#include "storage/backendid.h" #include "storage/proc.h" #include "storage/sinval.h" #include "storage/sinvaladt.h" @@ -411,3 +410,31 @@ GetUndoRecPtr(void) return (urec); } + +/* + * BackendIdGetProc - given a BackendId, find its PROC structure + * + * This is a trivial lookup in the ProcState array. We assume that the caller + * knows that the backend isn't going to go away, so we do not bother with + * locking. + */ +struct proc * +BackendIdGetProc(BackendId procId) +{ + SISeg *segP = shmInvalBuffer; + + if (procId > 0 && procId <= segP->lastBackend) + { + ProcState *stateP = &segP->procState[procId - 1]; + SHMEM_OFFSET pOffset = stateP->procStruct; + + if (pOffset != INVALID_OFFSET) + { + PROC *proc = (PROC *) MAKE_PTR(pOffset); + + return proc; + } + } + + return NULL; +} |