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fix fallback checks for kernels without private futex support

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for unknown syscall commands, the kernel produces ENOSYS, not EINVAL.
This commit is contained in:
Rich Felker
2014-08-22 23:49:54 -04:00
parent a6293285e9
commit b8ca9eb530
5 changed files with 5 additions and 5 deletions
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2
src/internal/pthread_impl.h
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@ -112,7 +112,7 @@ static inline void __wake(volatile void *addr, int cnt, int priv)
{ {
if (priv) priv = 128; if (priv) priv = 128;
if (cnt<0) cnt = INT_MAX; if (cnt<0) cnt = INT_MAX;
__syscall(SYS_futex, addr, FUTEX_WAKE|priv, cnt) != -EINVAL || __syscall(SYS_futex, addr, FUTEX_WAKE|priv, cnt) != -ENOSYS ||
__syscall(SYS_futex, addr, FUTEX_WAKE, cnt); __syscall(SYS_futex, addr, FUTEX_WAKE, cnt);
} }

2
src/thread/__timedwait.c
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@ -29,7 +29,7 @@ int __timedwait(volatile int *addr, int val,
pthread_cleanup_push(cleanup, arg); pthread_cleanup_push(cleanup, arg);
r = -__syscall_cp(SYS_futex, addr, FUTEX_WAIT|priv, val, top); r = -__syscall_cp(SYS_futex, addr, FUTEX_WAIT|priv, val, top);
if (r == EINVAL) r = -__syscall_cp(SYS_futex, addr, FUTEX_WAIT, val, top); if (r == ENOSYS) r = -__syscall_cp(SYS_futex, addr, FUTEX_WAIT, val, top);
if (r != EINTR && r != ETIMEDOUT) r = 0; if (r != EINTR && r != ETIMEDOUT) r = 0;
pthread_cleanup_pop(0); pthread_cleanup_pop(0);

2
src/thread/__wait.c
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@ -10,7 +10,7 @@ void __wait(volatile int *addr, volatile int *waiters, int val, int priv)
} }
if (waiters) a_inc(waiters); if (waiters) a_inc(waiters);
while (*addr==val) { while (*addr==val) {
__syscall(SYS_futex, addr, FUTEX_WAIT|priv, val, 0) != -EINVAL __syscall(SYS_futex, addr, FUTEX_WAIT|priv, val, 0) != -ENOSYS
|| __syscall(SYS_futex, addr, FUTEX_WAIT, val, 0); || __syscall(SYS_futex, addr, FUTEX_WAIT, val, 0);
} }
if (waiters) a_dec(waiters); if (waiters) a_dec(waiters);

2
src/thread/pthread_barrier_wait.c
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@ -87,7 +87,7 @@ int pthread_barrier_wait(pthread_barrier_t *b)
a_spin(); a_spin();
a_inc(&inst->finished); a_inc(&inst->finished);
while (inst->finished == 1) while (inst->finished == 1)
__syscall(SYS_futex,&inst->finished,FUTEX_WAIT|128,1,0) != -EINTR __syscall(SYS_futex,&inst->finished,FUTEX_WAIT|128,1,0) != -ENOSYS
|| __syscall(SYS_futex,&inst->finished,FUTEX_WAIT,1,0); || __syscall(SYS_futex,&inst->finished,FUTEX_WAIT,1,0);
return PTHREAD_BARRIER_SERIAL_THREAD; return PTHREAD_BARRIER_SERIAL_THREAD;
} }

2
src/thread/pthread_cond_timedwait.c
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@ -52,7 +52,7 @@ static inline void unlock_requeue(volatile int *l, volatile int *r, int w)
{ {
a_store(l, 0); a_store(l, 0);
if (w) __wake(l, 1, 1); if (w) __wake(l, 1, 1);
else __syscall(SYS_futex, l, FUTEX_REQUEUE|128, 0, 1, r) != -EINVAL else __syscall(SYS_futex, l, FUTEX_REQUEUE|128, 0, 1, r) != -ENOSYS
|| __syscall(SYS_futex, l, FUTEX_REQUEUE, 0, 1, r); || __syscall(SYS_futex, l, FUTEX_REQUEUE, 0, 1, r);
} }