diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/hppa/internaltypes.h')
| -rw-r--r-- | sysdeps/unix/sysv/linux/hppa/internaltypes.h | 40 |
1 files changed, 23 insertions, 17 deletions
diff --git a/sysdeps/unix/sysv/linux/hppa/internaltypes.h b/sysdeps/unix/sysv/linux/hppa/internaltypes.h index 651ce2ee45..d6496579da 100644 --- a/sysdeps/unix/sysv/linux/hppa/internaltypes.h +++ b/sysdeps/unix/sysv/linux/hppa/internaltypes.h @@ -46,32 +46,38 @@ fails because __initializer is zero, and the structure will be used as is correctly. */ #define cond_compat_clear(var) \ -({ \ - int tmp = 0; \ - var->__data.__lock = 0; \ - var->__data.__futex = 0; \ - var->__data.__mutex = NULL; \ - /* Clear __initializer last, to indicate initialization is done. */ \ - __asm__ __volatile__ ("stw,ma %1,0(%0)" \ - : : "r" (&var->__data.__initializer), "r" (tmp) : "memory"); \ +({ \ + int tmp = 0; \ + var->__data.__wseq = 0; \ + var->__data.__signals_sent = 0; \ + var->__data.__confirmed = 0; \ + var->__data.__generation = 0; \ + var->__data.__mutex = NULL; \ + var->__data.__quiescence_waiters = 0; \ + var->__data.__clockid = 0; \ + /* Clear __initializer last, to indicate initialization is done. */ \ + /* This synchronizes-with the acquire load below. */ \ + atomic_store_release (&var->__data.__initializer, 0); \ }) #define cond_compat_check_and_clear(var) \ ({ \ - int ret; \ - volatile int *value = &var->__data.__initializer; \ - if ((ret = atomic_compare_and_exchange_val_acq(value, 2, 1))) \ + int v; \ + int *value = &var->__data.__initializer; \ + /* This synchronizes-with the release store above. */ \ + while ((v = atomic_load_acquire (value)) != 0) \ { \ - if (ret == 1) \ + if (v == 1 \ + /* Relaxed MO is fine; it only matters who's first. */ \ + && atomic_compare_exchange_acquire_weak_relaxed (value, 1, 2)) \ { \ - /* Initialize structure. */ \ + /* We're first; initialize structure. */ \ cond_compat_clear (var); \ + break; \ } \ else \ - { \ - /* Yield until structure is initialized. */ \ - while (*value == 2) sched_yield (); \ - } \ + /* Yield before we re-check initialization status. */ \ + sched_yield (); \ } \ }) |