diff options
Diffstat (limited to 'source4/lib/tdb/spinlock.c')
| -rw-r--r-- | source4/lib/tdb/spinlock.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/source4/lib/tdb/spinlock.c b/source4/lib/tdb/spinlock.c index dc7fa3b784..1b789d4daa 100644 --- a/source4/lib/tdb/spinlock.c +++ b/source4/lib/tdb/spinlock.c @@ -149,6 +149,47 @@ static inline int __spin_is_locked(spinlock_t *lock) return (*lock != 1); } +#elif defined(MIPS_SPINLOCKS) && defined(sgi) && (_COMPILER_VERSION >= 730) + +/* Implement spinlocks on IRIX using the MIPSPro atomic fetch operations. See + * sync(3) for the details of the intrinsic operations. + * + * "sgi" and "_COMPILER_VERSION" are always defined by MIPSPro. + */ + +#if defined(STANDALONE) + +/* MIPSPro 7.3 has "__inline" as an extension, but not "inline. */ +#define inline __inline + +#endif /* STANDALONE */ + +/* Returns 0 if the lock is acquired, EBUSY otherwise. */ +static inline int __spin_trylock(spinlock_t *lock) +{ + unsigned int val; + val = __lock_test_and_set(lock, 1); + return val == 0 ? 0 : EBUSY; +} + +static inline void __spin_unlock(spinlock_t *lock) +{ + __lock_release(lock); +} + +static inline void __spin_lock_init(spinlock_t *lock) +{ + __lock_release(lock); +} + +/* Returns 1 if the lock is held, 0 otherwise. */ +static inline int __spin_is_locked(spinlock_t *lock) +{ + unsigned int val; + val = __add_and_fetch(lock, 0); + return val; +} + #elif defined(MIPS_SPINLOCKS) static inline unsigned int load_linked(unsigned long addr) @@ -227,7 +268,11 @@ static void yield_cpu(void) static int this_is_smp(void) { +#if defined(HAVE_SYSCONF) && defined(SYSCONF_SC_NPROC_ONLN) + return (sysconf(_SC_NPROC_ONLN) > 1) ? 1 : 0; +#else return 0; +#endif } /* |