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(__lll_robust_lock_wait): Also set FUTEX_WAITERS buit if we got the mutex. (__lll_robust_timedlock_wait): Likewise.

This commit is contained in:
Ulrich Drepper 2006-03-02 00:25:56 +00:00
parent c99445f897
commit 42b6ddfca5
2 changed files with 6 additions and 2 deletions
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2
nptl/sysdeps/unix/sysv/linux/i386/i486/lowlevelrobustlock.S
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@ -74,6 +74,7 @@ __lll_robust_mutex_lock_wait:
jne 4b
movl %gs:TID, %edx
orl $FUTEX_WAITERS, %edx
LOCK
cmpxchgl %edx, (%ebx)
jnz 4b
@ -163,6 +164,7 @@ __lll_robust_mutex_timedlock_wait:
jne 7f
movl %gs:TID, %edx
orl $FUTEX_WAITERS, %edx
LOCK
cmpxchgl %edx, (%ebx)
jnz 7f

6
nptl/sysdeps/unix/sysv/linux/lowlevelrobustlock.c
View File

@ -42,7 +42,9 @@ __lll_robust_lock_wait (int *futex)
lll_futex_wait (futex, newval);
}
while ((oldval = atomic_compare_and_exchange_val_acq (futex, tid, 0)) != 0);
while ((oldval = atomic_compare_and_exchange_val_acq (futex,
tid | FUTEX_WAITERS,
0)) != 0);
return 0;
}
@ -89,7 +91,7 @@ __lll_robust_timedlock_wait (int *futex, const struct timespec *abstime)
lll_futex_timed_wait (futex, newval, &rt);
}
while (atomic_compare_and_exchange_bool_acq (futex, tid, 0));
while (atomic_compare_and_exchange_bool_acq (futex, tid | FUTEX_WAITERS, 0));
return 0;
}