diff options
Diffstat (limited to 'sysdeps/sparc/sparc32/sem_waitcommon.c')
| -rw-r--r-- | sysdeps/sparc/sparc32/sem_waitcommon.c | 146 |
1 files changed, 0 insertions, 146 deletions
diff --git a/sysdeps/sparc/sparc32/sem_waitcommon.c b/sysdeps/sparc/sparc32/sem_waitcommon.c deleted file mode 100644 index 907101bb06..0000000000 --- a/sysdeps/sparc/sparc32/sem_waitcommon.c +++ /dev/null @@ -1,146 +0,0 @@ -/* sem_waitcommon -- wait on a semaphore, shared code. - Copyright (C) 2003-2019 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Paul Mackerras <paulus@au.ibm.com>, 2003. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - <https://www.gnu.org/licenses/>. */ - -#include <errno.h> -#include <sysdep.h> -#include <futex-internal.h> -#include <internaltypes.h> -#include <semaphore.h> -#include <sys/time.h> - -#include <pthreadP.h> -#include <shlib-compat.h> -#include <atomic.h> - - -static void -__sem_wait_32_finish (struct new_sem *sem); - -static void -__sem_wait_cleanup (void *arg) -{ - struct new_sem *sem = (struct new_sem *) arg; - - __sem_wait_32_finish (sem); -} - -/* Wait until at least one token is available, possibly with a timeout. - This is in a separate function in order to make sure gcc - puts the call site into an exception region, and thus the - cleanups get properly run. TODO still necessary? Other futex_wait - users don't seem to need it. */ -static int -__attribute__ ((noinline)) -do_futex_wait (struct new_sem *sem, const struct timespec *abstime) -{ - int err; - - err = futex_abstimed_wait_cancelable (&sem->value, SEM_NWAITERS_MASK, - abstime, sem->private); - - return err; -} - -/* Fast path: Try to grab a token without blocking. */ -static int -__new_sem_wait_fast (struct new_sem *sem, int definitive_result) -{ - unsigned int v; - int ret = 0; - - __sparc32_atomic_do_lock24(&sem->pad); - - v = sem->value; - if ((v >> SEM_VALUE_SHIFT) == 0) - ret = -1; - else - sem->value = v - (1 << SEM_VALUE_SHIFT); - - __sparc32_atomic_do_unlock24(&sem->pad); - - return ret; -} - -/* Slow path that blocks. */ -static int -__attribute__ ((noinline)) -__new_sem_wait_slow (struct new_sem *sem, const struct timespec *abstime) -{ - unsigned int v; - int err = 0; - - __sparc32_atomic_do_lock24(&sem->pad); - - sem->nwaiters++; - - pthread_cleanup_push (__sem_wait_cleanup, sem); - - /* Wait for a token to be available. Retry until we can grab one. */ - v = sem->value; - do - { - if (!(v & SEM_NWAITERS_MASK)) - sem->value = v | SEM_NWAITERS_MASK; - - /* If there is no token, wait. */ - if ((v >> SEM_VALUE_SHIFT) == 0) - { - __sparc32_atomic_do_unlock24(&sem->pad); - - err = do_futex_wait(sem, abstime); - if (err == ETIMEDOUT || err == EINTR) - { - __set_errno (err); - err = -1; - goto error; - } - err = 0; - - __sparc32_atomic_do_lock24(&sem->pad); - - /* We blocked, so there might be a token now. */ - v = sem->value; - } - } - /* If there is no token, we must not try to grab one. */ - while ((v >> SEM_VALUE_SHIFT) == 0); - - sem->value = v - (1 << SEM_VALUE_SHIFT); - - __sparc32_atomic_do_unlock24(&sem->pad); - -error: - pthread_cleanup_pop (0); - - __sem_wait_32_finish (sem); - - return err; -} - -/* Stop being a registered waiter (non-64b-atomics code only). */ -static void -__sem_wait_32_finish (struct new_sem *sem) -{ - __sparc32_atomic_do_lock24(&sem->pad); - - if (--sem->nwaiters == 0) - sem->value &= ~SEM_NWAITERS_MASK; - - __sparc32_atomic_do_unlock24(&sem->pad); -} |