diff options
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/s390/lowlevellock.h')
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/s390/lowlevellock.h | 99 |
1 files changed, 98 insertions, 1 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/s390/lowlevellock.h b/nptl/sysdeps/unix/sysv/linux/s390/lowlevellock.h index f4ed98a503..38d9f2ac41 100644 --- a/nptl/sysdeps/unix/sysv/linux/s390/lowlevellock.h +++ b/nptl/sysdeps/unix/sysv/linux/s390/lowlevellock.h @@ -1,4 +1,4 @@ -/* Copyright (C) 2003, 2004 Free Software Foundation, Inc. +/* Copyright (C) 2003, 2004, 2006 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Martin Schwidefsky <schwidefsky@de.ibm.com>, 2003. @@ -30,6 +30,11 @@ #define FUTEX_WAKE 1 #define FUTEX_REQUEUE 3 #define FUTEX_CMP_REQUEUE 4 +#define FUTEX_WAKE_OP 5 +#define FUTEX_OP_CLEAR_WAKE_IF_GT_ONE ((4 << 24) | 1) +#define FUTEX_LOCK_PI 6 +#define FUTEX_UNLOCK_PI 7 +#define FUTEX_TRYLOCK_PI 8 /* Initializer for compatibility lock. */ #define LLL_MUTEX_LOCK_INITIALIZER (0) @@ -83,6 +88,17 @@ }) +#define lll_robust_mutex_dead(futexv) \ + do \ + { \ + int *__futexp = &(futexv); \ + \ + atomic_or (__futexp, FUTEX_OWNER_DIED); \ + lll_futex_wake (__futexp, 1); \ + } \ + while (0) + + /* Returns non-zero if error happened, zero if success. */ #define lll_futex_requeue(futex, nr_wake, nr_move, mutex, val) \ ({ \ @@ -103,6 +119,27 @@ }) +/* Returns non-zero if error happened, zero if success. */ +#define lll_futex_wake_unlock(futex, nr_wake, nr_wake2, futex2) \ + ({ \ + register unsigned long int __r2 asm ("2") = (unsigned long int) (futex); \ + register unsigned long int __r3 asm ("3") = FUTEX_WAKE_OP; \ + register unsigned long int __r4 asm ("4") = (long int) (nr_wake); \ + register unsigned long int __r5 asm ("5") = (long int) (nr_wake2); \ + register unsigned long int __r6 asm ("6") = (unsigned long int) (futex2); \ + register unsigned long int __r7 asm ("7") \ + = (int) FUTEX_OP_CLEAR_WAKE_IF_GT_ONE; \ + register unsigned long __result asm ("2"); \ + \ + __asm __volatile ("svc %b1" \ + : "=d" (__result) \ + : "i" (SYS_futex), "0" (__r2), "d" (__r3), \ + "d" (__r4), "d" (__r5), "d" (__r6), "d" (__r7) \ + : "cc", "memory" ); \ + __result > -4096UL; \ + }) + + #define lll_compare_and_swap(futex, oldval, newval, operation) \ do { \ __typeof (futex) __futex = (futex); \ @@ -144,7 +181,23 @@ __lll_mutex_cond_trylock (int *futex) #define lll_mutex_cond_trylock(futex) __lll_mutex_cond_trylock (&(futex)) +static inline int +__attribute__ ((always_inline)) +__lll_robust_mutex_trylock (int *futex, int id) +{ + unsigned int old; + + __asm __volatile ("cs %0,%3,%1" + : "=d" (old), "=Q" (*futex) + : "0" (0), "d" (id), "m" (*futex) : "cc", "memory" ); + return old != 0; +} +#define lll_robust_mutex_trylock(futex, id) \ + __lll_robust_mutex_trylock (&(futex), id) + + extern void __lll_lock_wait (int *futex) attribute_hidden; +extern int __lll_robust_lock_wait (int *futex) attribute_hidden; static inline void __attribute__ ((always_inline)) @@ -155,6 +208,17 @@ __lll_mutex_lock (int *futex) } #define lll_mutex_lock(futex) __lll_mutex_lock (&(futex)) +static inline int +__attribute__ ((always_inline)) +__lll_robust_mutex_lock (int *futex, int id) +{ + int result = 0; + if (atomic_compare_and_exchange_bool_acq (futex, id, 0) != 0) + result = __lll_robust_lock_wait (futex); + return result; +} +#define lll_robust_mutex_lock(futex, id) __lll_robust_mutex_lock (&(futex), id) + static inline void __attribute__ ((always_inline)) __lll_mutex_cond_lock (int *futex) @@ -164,8 +228,13 @@ __lll_mutex_cond_lock (int *futex) } #define lll_mutex_cond_lock(futex) __lll_mutex_cond_lock (&(futex)) +#define lll_robust_mutex_cond_lock(futex, id) \ + __lll_robust_mutex_lock (&(futex), (id) | FUTEX_WAITERS) + extern int __lll_timedlock_wait (int *futex, const struct timespec *) attribute_hidden; +extern int __lll_robust_timedlock_wait + (int *futex, const struct timespec *) attribute_hidden; static inline int __attribute__ ((always_inline)) @@ -179,6 +248,19 @@ __lll_mutex_timedlock (int *futex, const struct timespec *abstime) #define lll_mutex_timedlock(futex, abstime) \ __lll_mutex_timedlock (&(futex), abstime) +static inline int +__attribute__ ((always_inline)) +__lll_robust_mutex_timedlock (int *futex, const struct timespec *abstime, + int id) +{ + int result = 0; + if (atomic_compare_and_exchange_bool_acq (futex, id, 0) != 0) + result = __lll_robust_timedlock_wait (futex, abstime); + return result; +} +#define lll_robust_mutex_timedlock(futex, abstime, id) \ + __lll_robust_mutex_timedlock (&(futex), abstime, id) + static inline void __attribute__ ((always_inline)) @@ -197,6 +279,21 @@ __lll_mutex_unlock (int *futex) static inline void __attribute__ ((always_inline)) +__lll_robust_mutex_unlock (int *futex, int mask) +{ + int oldval; + int newval = 0; + + lll_compare_and_swap (futex, oldval, newval, "slr %2,%2"); + if (oldval & mask) + lll_futex_wake (futex, 1); +} +#define lll_robust_mutex_unlock(futex) \ + __lll_robust_mutex_unlock(&(futex), FUTEX_WAITERS) + + +static inline void +__attribute__ ((always_inline)) __lll_mutex_unlock_force (int *futex) { *futex = 0; |