diff options
| -rw-r--r-- | src/backend/port/posix_sema.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/src/backend/port/posix_sema.c b/src/backend/port/posix_sema.c index a2cabe58fcb..5174550794b 100644 --- a/src/backend/port/posix_sema.c +++ b/src/backend/port/posix_sema.c @@ -41,13 +41,19 @@ #error cannot use named POSIX semaphores with EXEC_BACKEND #endif +typedef union SemTPadded +{ + sem_t pgsem; + char pad[PG_CACHE_LINE_SIZE]; +} SemTPadded; + /* typedef PGSemaphore is equivalent to pointer to sem_t */ typedef struct PGSemaphoreData { - sem_t pgsem; + SemTPadded sem_padded; } PGSemaphoreData; -#define PG_SEM_REF(x) (&(x)->pgsem) +#define PG_SEM_REF(x) (&(x)->sem_padded.pgsem) #define IPCProtection (0600) /* access/modify by user only */ |