diff options
Diffstat (limited to 'src/backend/storage/ipc/s_lock.c')
| -rw-r--r-- | src/backend/storage/ipc/s_lock.c | 35 |
1 files changed, 34 insertions, 1 deletions
diff --git a/src/backend/storage/ipc/s_lock.c b/src/backend/storage/ipc/s_lock.c index 539a7f9af44..75dd8dcc83a 100644 --- a/src/backend/storage/ipc/s_lock.c +++ b/src/backend/storage/ipc/s_lock.c @@ -7,7 +7,7 @@ * * * IDENTIFICATION - * $Header: /cvsroot/pgsql/src/backend/storage/ipc/Attic/s_lock.c,v 1.12 1997/03/12 21:06:48 scrappy Exp $ + * $Header: /cvsroot/pgsql/src/backend/storage/ipc/Attic/s_lock.c,v 1.13 1997/04/24 02:35:35 scrappy Exp $ * *------------------------------------------------------------------------- */ @@ -453,4 +453,37 @@ S_INIT_LOCK(slock_t *lock) #endif +#if defined(linux) && defined(sparc) + +int +tas(slock_t *m) +{ + slock_t res; + __asm__("ldstub [%1], %0" + : "=&r" (res) + : "r" (m)); + return (res != 0); +} + +void +S_LOCK(slock_t *lock) +{ + while (tas(lock)) + ; +} + +void +S_UNLOCK(slock_t *lock) +{ + *lock = 0; +} + +void +S_INIT_LOCK(slock_t *lock) +{ + S_UNLOCK(lock); +} + +#endif /* defined(linux) && defined(sparc) */ + #endif /* HAS_TEST_AND_SET */ |