diff options
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/sparc/sparc32/sem_wait.c')
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/sparc/sparc32/sem_wait.c | 176 |
1 files changed, 0 insertions, 176 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/sparc/sparc32/sem_wait.c b/nptl/sysdeps/unix/sysv/linux/sparc/sparc32/sem_wait.c deleted file mode 100644 index 8c072fe5f4..0000000000 --- a/nptl/sysdeps/unix/sysv/linux/sparc/sparc32/sem_wait.c +++ /dev/null @@ -1,176 +0,0 @@ -/* sem_wait -- wait on a semaphore. Generic futex-using version. - Copyright (C) 2003-2014 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 - <http://www.gnu.org/licenses/>. */ - -#include <errno.h> -#include <sysdep.h> -#include <lowlevellock.h> -#include <internaltypes.h> -#include <semaphore.h> - -#include <pthreadP.h> -#include <shlib-compat.h> - - -void -attribute_hidden -__sem_wait_cleanup (void *arg) -{ - struct sparc_new_sem *isem = (struct sparc_new_sem *) arg; - - if (__atomic_is_v9) - atomic_decrement (&isem->nwaiters); - else - { - __sparc32_atomic_do_lock24 (&isem->lock); - isem->nwaiters--; - __sparc32_atomic_do_unlock24 (&isem->lock); - } -} - -/* This is in a seperate function in order to make sure gcc - puts the call site into an exception region, and thus the - cleanups get properly run. */ -static int -__attribute__ ((noinline)) -do_futex_wait (struct sparc_new_sem *isem) -{ - int err, oldtype = __pthread_enable_asynccancel (); - - err = lll_futex_wait (&isem->value, 0, isem->private ^ FUTEX_PRIVATE_FLAG); - - __pthread_disable_asynccancel (oldtype); - return err; -} - -int -__new_sem_wait (sem_t *sem) -{ - struct sparc_new_sem *isem = (struct sparc_new_sem *) sem; - int err; - int val; - - if (__atomic_is_v9) - val = atomic_decrement_if_positive (&isem->value); - else - { - __sparc32_atomic_do_lock24 (&isem->lock); - val = isem->value; - if (val > 0) - isem->value = val - 1; - else - isem->nwaiters++; - __sparc32_atomic_do_unlock24 (&isem->lock); - } - - if (val > 0) - return 0; - - if (__atomic_is_v9) - atomic_increment (&isem->nwaiters); - else - /* Already done above while still holding isem->lock. */; - - pthread_cleanup_push (__sem_wait_cleanup, isem); - - while (1) - { - err = do_futex_wait(isem); - if (err != 0 && err != -EWOULDBLOCK) - { - __set_errno (-err); - err = -1; - break; - } - - if (__atomic_is_v9) - val = atomic_decrement_if_positive (&isem->value); - else - { - __sparc32_atomic_do_lock24 (&isem->lock); - val = isem->value; - if (val > 0) - isem->value = val - 1; - __sparc32_atomic_do_unlock24 (&isem->lock); - } - - if (val > 0) - { - err = 0; - break; - } - } - - pthread_cleanup_pop (0); - - if (__atomic_is_v9) - atomic_decrement (&isem->nwaiters); - else - { - __sparc32_atomic_do_lock24 (&isem->lock); - isem->nwaiters--; - __sparc32_atomic_do_unlock24 (&isem->lock); - } - - return err; -} -versioned_symbol (libpthread, __new_sem_wait, sem_wait, GLIBC_2_1); - - -#if SHLIB_COMPAT (libpthread, GLIBC_2_0, GLIBC_2_1) -int -attribute_compat_text_section -__old_sem_wait (sem_t *sem) -{ - struct sparc_old_sem *isem = (struct sparc_old_sem *) sem; - int err; - int val; - - do - { - if (__atomic_is_v9) - val = atomic_decrement_if_positive (&isem->value); - else - { - __sparc32_atomic_do_lock24 (&isem->lock); - val = isem->value; - if (val > 0) - isem->value = val - 1; - __sparc32_atomic_do_unlock24 (&isem->lock); - } - - if (val > 0) - return 0; - - /* Enable asynchronous cancellation. Required by the standard. */ - int oldtype = __pthread_enable_asynccancel (); - - err = lll_futex_wait (&isem->value, 0, - isem->private ^ FUTEX_PRIVATE_FLAG); - - /* Disable asynchronous cancellation. */ - __pthread_disable_asynccancel (oldtype); - } - while (err == 0 || err == -EWOULDBLOCK); - - __set_errno (-err); - return -1; -} - -compat_symbol (libpthread, __old_sem_wait, sem_wait, GLIBC_2_0); -#endif |