diff options
Diffstat (limited to 'REORG.TODO/nptl/sem_init.c')
-rw-r--r-- | REORG.TODO/nptl/sem_init.c | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/REORG.TODO/nptl/sem_init.c b/REORG.TODO/nptl/sem_init.c new file mode 100644 index 0000000000..b9b839cd64 --- /dev/null +++ b/REORG.TODO/nptl/sem_init.c @@ -0,0 +1,90 @@ +/* Copyright (C) 2002-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. + + 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 <semaphore.h> +#include <shlib-compat.h> +#include "semaphoreP.h" +#include <kernel-features.h> +#include <futex-internal.h> + + +int +__new_sem_init (sem_t *sem, int pshared, unsigned int value) +{ + /* Parameter sanity check. */ + if (__glibc_unlikely (value > SEM_VALUE_MAX)) + { + __set_errno (EINVAL); + return -1; + } + pshared = pshared != 0 ? PTHREAD_PROCESS_SHARED : PTHREAD_PROCESS_PRIVATE; + int err = futex_supports_pshared (pshared); + if (err != 0) + { + __set_errno (err); + return -1; + } + + /* Map to the internal type. */ + struct new_sem *isem = (struct new_sem *) sem; + + /* Use the values the caller provided. */ +#if __HAVE_64B_ATOMICS + isem->data = value; +#else + isem->value = value << SEM_VALUE_SHIFT; + /* pad is used as a mutex on pre-v9 sparc and ignored otherwise. */ + isem->pad = 0; + isem->nwaiters = 0; +#endif + + isem->private = (pshared == PTHREAD_PROCESS_PRIVATE + ? FUTEX_PRIVATE : FUTEX_SHARED); + + return 0; +} +versioned_symbol (libpthread, __new_sem_init, sem_init, GLIBC_2_1); + + + +#if SHLIB_COMPAT(libpthread, GLIBC_2_0, GLIBC_2_1) +int +attribute_compat_text_section +__old_sem_init (sem_t *sem, int pshared, unsigned int value) +{ + /* Parameter sanity check. */ + if (__glibc_unlikely (value > SEM_VALUE_MAX)) + { + __set_errno (EINVAL); + return -1; + } + + /* Map to the internal type. */ + struct old_sem *isem = (struct old_sem *) sem; + + /* Use the value the user provided. */ + isem->value = value; + + /* We cannot store the PSHARED attribute. So we always use the + operations needed for shared semaphores. */ + + return 0; +} +compat_symbol (libpthread, __old_sem_init, sem_init, GLIBC_2_0); +#endif |