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Add __builtin_expect where appropriate.

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This commit is contained in:
Ulrich Drepper
2003-03-18 00:31:30 +00:00
parent 0a8d800411
commit bd0fa4cefd
6 changed files with 146 additions and 154 deletions
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70
nptl/sysdeps/unix/sysv/linux/lowlevellock.c
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@ -27,9 +27,9 @@
void
__lll_lock_wait (int *futex, int val)
{
do {
lll_futex_wait (futex, val+1);
} while ((val = __lll_add (futex, 1)) != 0);
do
lll_futex_wait (futex, val + 1);
while ((val = __lll_add (futex, 1)) != 0);
*futex = 2;
}
hidden_proto (__lll_lock_wait)
@ -38,8 +38,6 @@ hidden_proto (__lll_lock_wait)
int
__lll_timedlock_wait (int *futex, int val, const struct timespec *abstime)
{
int err;
/* Reject invalid timeouts. */
if (abstime->tv_nsec >= 1000000000)
return EINVAL;
@ -48,33 +46,31 @@ __lll_timedlock_wait (int *futex, int val, const struct timespec *abstime)
{
struct timeval tv;
struct timespec rt;
int sec, nsec;
/* Get the current time. */
__gettimeofday (&tv, NULL);
(void) __gettimeofday (&tv, NULL);
/* Compute relative timeout. */
sec = abstime->tv_sec - tv.tv_sec;
nsec = abstime->tv_nsec - tv.tv_usec * 1000;
if (nsec < 0)
rt.tv_sec = abstime->tv_sec - tv.tv_sec;
rt.tv_nsec = abstime->tv_nsec - tv.tv_usec * 1000;
if (rt.tv_nsec < 0)
{
nsec += 1000000000;
--sec;
rt.tv_nsec += 1000000000;
--rt.tv_sec;
}
/* Already timed out? */
err = -ETIMEDOUT;
if (sec < 0)
break;
if (rt.tv_sec < 0)
return ETIMEDOUT;
/* Wait. */
rt.tv_sec = sec;
rt.tv_nsec = nsec;
err = lll_futex_timed_wait (futex, val+1, &rt);
} while (err == 0 && (val = __lll_add (futex, 1)) != 0);
if (lll_futex_timed_wait (futex, val + 1, &rt) == -ETIMEDOUT)
return ETIMEDOUT;
}
while ((val = __lll_add (futex, 1)) != 0);
*futex = 2;
return -err;
return 0;
}
hidden_proto (__lll_timedlock_wait)
@ -84,7 +80,9 @@ hidden_proto (__lll_timedlock_wait)
int
lll_unlock_wake_cb (int *futex)
{
__lll_add (futex, 1);
if (__lll_add (futex, 1) + 1 != 0)
lll_futex_wake (futex, 1);
return 0;
}
hidden_proto (lll_unlock_wake_cb)
@ -94,7 +92,6 @@ int
__lll_timedwait_tid (int *tidp, const struct timespec *abstime)
{
int tid;
int err = 0;
if (abstime == NULL || abstime->tv_nsec >= 1000000000)
return EINVAL;
@ -104,36 +101,29 @@ __lll_timedwait_tid (int *tidp, const struct timespec *abstime)
{
struct timeval tv;
struct timespec rt;
int sec, nsec;
/* Get the current time. */
__gettimeofday (&tv, NULL);
(void) __gettimeofday (&tv, NULL);
/* Compute relative timeout. */
sec = abstime->tv_sec - tv.tv_sec;
nsec = abstime->tv_nsec - tv.tv_usec * 1000;
if (nsec < 0)
rt.tv_sec = abstime->tv_sec - tv.tv_sec;
rt.tv_nsec = abstime->tv_nsec - tv.tv_usec * 1000;
if (rt.tv_nsec < 0)
{
nsec += 1000000000;
--sec;
rt.tv_nsec += 1000000000;
--rt.tv_sec;
}
/* Already timed out? */
err = -ETIMEDOUT;
if (sec < 0)
break;
/* Wait. */
rt.tv_sec = sec;
rt.tv_nsec = nsec;
if (rt.tv_sec < 0)
return ETIMEDOUT;
/* Wait until thread terminates. */
err = lll_futex_timed_wait (tidp, tid, &rt);
if (err != 0)
break;
if (lll_futex_timed_wait (tidp, tid, &rt) == -ETIMEDOUT)
return ETIMEDOUT;
}
return -err;
return 0;
}
hidden_proto (__lll_timedwait_tid)