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| author | Adhemerval Zanella <azanella@linux.vnet.ibm.com> | 2014-05-21 16:08:06 -0500 |
|---|---|---|
| committer | Adhemerval Zanella <azanella@linux.vnet.ibm.com> | 2014-05-26 11:45:14 -0500 |
| commit | c7a8d667878a25bad5d7ab41fbbb603e535da661 (patch) | |
| tree | 06ee75eaa7df12c63ecb23117e5211e5ee345655 /sysdeps/unix/sysv/linux/powerpc/sem_post.c | |
| parent | daee7851e28051fc81b50ac7862d923d77324e83 (diff) | |
| download | glibc-c7a8d667878a25bad5d7ab41fbbb603e535da661.tar glibc-c7a8d667878a25bad5d7ab41fbbb603e535da661.tar.gz glibc-c7a8d667878a25bad5d7ab41fbbb603e535da661.tar.bz2 glibc-c7a8d667878a25bad5d7ab41fbbb603e535da661.zip | |
PowerPC: Move remaining nptl/sysdeps/unix/sysv/linux/powerpc/ files.
Diffstat (limited to 'sysdeps/unix/sysv/linux/powerpc/sem_post.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/powerpc/sem_post.c | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/powerpc/sem_post.c b/sysdeps/unix/sysv/linux/powerpc/sem_post.c new file mode 100644 index 0000000000..f222d9a69c --- /dev/null +++ b/sysdeps/unix/sysv/linux/powerpc/sem_post.c @@ -0,0 +1,71 @@ +/* sem_post -- post to a POSIX semaphore. Powerpc 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 <shlib-compat.h> + +int +__new_sem_post (sem_t *sem) +{ + struct new_sem *isem = (struct new_sem *) sem; + + __asm __volatile (__lll_rel_instr ::: "memory"); + atomic_increment (&isem->value); + __asm __volatile (__lll_acq_instr ::: "memory"); + if (isem->nwaiters > 0) + { + int err = lll_futex_wake (&isem->value, 1, + isem->private ^ FUTEX_PRIVATE_FLAG); + if (__builtin_expect (err, 0) < 0) + { + __set_errno (-err); + return -1; + } + } + 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; + + __asm __volatile (__lll_rel_instr ::: "memory"); + (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 |