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author | Roland McGrath <roland@gnu.org> | 2003-03-11 09:30:37 +0000 |
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committer | Roland McGrath <roland@gnu.org> | 2003-03-11 09:30:37 +0000 |
commit | b33e61633a10a233510f6f49b97b7e2ad15c7311 (patch) | |
tree | 9b6025b692435f629bc771dca74dcfb48e41768a /nptl/sysdeps/unix/sysv/linux/ia64/sem_wait.c | |
parent | 5d5d5969b17422e3b1af6f88436e91f32a36fd58 (diff) | |
download | glibc-b33e61633a10a233510f6f49b97b7e2ad15c7311.tar.gz glibc-b33e61633a10a233510f6f49b97b7e2ad15c7311.tar.xz glibc-b33e61633a10a233510f6f49b97b7e2ad15c7311.zip |
* sysdeps/generic/dl-sysdep.c (_dl_important_hwcaps): If CNT == 1,
allocate space even for the trailing '/'. Reported by John Reiser <jreiser@BitWagon.com>. * sysdeps/unix/sysv/linux/ia64/sysdep.h (LOAD_ARGS_6, ASM_ARGS_6, ASM_CLOBBERS_6): Define. (ASM_CLOBBERS_5): Use ASM_CLOBBERS_6. * sysdeps/unix/sysv/linux/ia64/clone2.S (__clone2): Reorder arguments to match IA-32 order. * sysdeps/unix/sysv/linux/i386/clone.S: Fix comment.
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/ia64/sem_wait.c')
-rw-r--r-- | nptl/sysdeps/unix/sysv/linux/ia64/sem_wait.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/ia64/sem_wait.c b/nptl/sysdeps/unix/sysv/linux/ia64/sem_wait.c new file mode 100644 index 0000000000..5409237513 --- /dev/null +++ b/nptl/sysdeps/unix/sysv/linux/ia64/sem_wait.c @@ -0,0 +1,63 @@ +/* Copyright (C) 2003 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <errno.h> +#include <sysdep.h> +#include <lowlevellock.h> +#include <internaltypes.h> + +#include <shlib-compat.h> + + +int +__new_sem_wait (sem_t *sem) +{ + int oldval, val; + + /* Atomically decrement semaphore counter if it is > 0. */ + val = *(int *) sem; + do + { + while (__builtin_expect (val == 0, 0)) + { + /* Do wait. */ + int err = lll_futex_wait ((int *) sem, 0); + + /* Handle EINTR. */ + if (err != 0 && err != -EWOULDBLOCK) + { + __set_errno (-err); + return -1; + } + + val = *(int *) sem; + } + oldval = val; + } + while ((val = lll_compare_and_swap ((int *) sem, oldval, oldval - 1)) + != oldval); + + return 0; +} + +versioned_symbol (libpthread, __new_sem_wait, sem_wait, GLIBC_2_1); +#if SHLIB_COMPAT(libpthread, GLIBC_2_0, GLIBC_2_1) +strong_alias (__new_sem_wait, __old_sem_wait) +compat_symbol (libpthread, __old_sem_wait, sem_wait, GLIBC_2_0); +#endif |