diff options
Diffstat (limited to 'sysdeps/sparc/sparc32/sem_post.c')
-rw-r--r-- | sysdeps/sparc/sparc32/sem_post.c | 82 |
1 files changed, 0 insertions, 82 deletions
diff --git a/sysdeps/sparc/sparc32/sem_post.c b/sysdeps/sparc/sparc32/sem_post.c deleted file mode 100644 index 5389725f83..0000000000 --- a/sysdeps/sparc/sparc32/sem_post.c +++ /dev/null @@ -1,82 +0,0 @@ -/* sem_post -- post to a POSIX semaphore. Generic futex-using version. - Copyright (C) 2003-2019 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Jakub Jelinek <jakub@redhat.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 <atomic.h> -#include <errno.h> -#include <sysdep.h> -#include <lowlevellock.h> -#include <internaltypes.h> -#include <semaphore.h> -#include <futex-internal.h> - -#include <shlib-compat.h> - - -/* See sem_wait for an explanation of the algorithm. */ -int -__new_sem_post (sem_t *sem) -{ - struct new_sem *isem = (struct new_sem *) sem; - int private = isem->private; - unsigned int v; - - __sparc32_atomic_do_lock24 (&isem->pad); - - v = isem->value; - if ((v >> SEM_VALUE_SHIFT) == SEM_VALUE_MAX) - { - __sparc32_atomic_do_unlock24 (&isem->pad); - - __set_errno (EOVERFLOW); - return -1; - } - isem->value = v + (1 << SEM_VALUE_SHIFT); - - __sparc32_atomic_do_unlock24 (&isem->pad); - - if ((v & SEM_NWAITERS_MASK) != 0) - futex_wake (&isem->value, 1, private); - - return 0; -} -versioned_symbol (libpthread, __new_sem_post, sem_post, GLIBC_2_1); - - -#if SHLIB_COMPAT (libpthread, GLIBC_2_0, GLIBC_2_1) -int -attribute_compat_text_section -__old_sem_post (sem_t *sem) -{ - int *futex = (int *) sem; - - /* We must need to synchronize with consumers of this token, so the atomic - increment must have release MO semantics. */ - atomic_write_barrier (); - (void) atomic_increment_val (futex); - /* We always have to assume it is a shared semaphore. */ - int err = lll_futex_wake (futex, 1, LLL_SHARED); - if (__builtin_expect (err, 0) < 0) - { - __set_errno (-err); - return -1; - } - return 0; -} -compat_symbol (libpthread, __old_sem_post, sem_post, GLIBC_2_0); -#endif |