diff options
| author | Roland McGrath <roland@gnu.org> | 2003-03-17 11:22:52 +0000 |
|---|---|---|
| committer | Roland McGrath <roland@gnu.org> | 2003-03-17 11:22:52 +0000 |
| commit | f3c13160fe2f53dd4971fe9772c9c23300a287be (patch) | |
| tree | 6dee91780dfa4d4ac75ff1a3775a0047edfd8c3e /nptl/sysdeps/unix/sysv/linux/sem_post.c | |
| parent | 5778033ffc5964450a20469a142202b5fdda36da (diff) | |
2003-03-17 Roland McGrath <roland@redhat.com>
PowerPC port contributed by Paul Mackerras <paulus@samba.org>.
* sysdeps/pthread/pthread_spin_init.c: New file.
* sysdeps/pthread/pthread_spin_unlock.c: New file.
* sysdeps/powerpc/Makefile: New file.
* sysdeps/powerpc/pthread_spin_lock.c: New file.
* sysdeps/powerpc/pthread_spin_trylock.c: New file.
* sysdeps/powerpc/pthreaddef.h: New file.
* sysdeps/powerpc/tcb-offsets.sym: New file.
* sysdeps/powerpc/td_ta_map_lwp2thr.c: New file.
* sysdeps/powerpc/tls.h: New file.
* sysdeps/powerpc/bits/atomic.h: New file.
* sysdeps/unix/sysv/linux/libc-lowlevelmutex.c: New file.
* sysdeps/unix/sysv/linux/libc-lowlevellock.c: New file.
* sysdeps/unix/sysv/linux/lowlevellock.c: New file.
* sysdeps/unix/sysv/linux/sem_post.c: New file.
* sysdeps/unix/sysv/linux/sem_timedwait.c: New file.
* sysdeps/unix/sysv/linux/sem_trywait.c: New file.
* sysdeps/unix/sysv/linux/powerpc/Makefile: New file.
* sysdeps/unix/sysv/linux/powerpc/createthread.c: New file.
* sysdeps/unix/sysv/linux/powerpc/fork.c: New file.
* sysdeps/unix/sysv/linux/powerpc/lowlevellock.h: New file.
* sysdeps/unix/sysv/linux/powerpc/pt-vfork.S: New file.
* sysdeps/unix/sysv/linux/powerpc/pthread_once.c: New file.
* sysdeps/unix/sysv/linux/powerpc/bits/pthreadtypes.h: New file.
* sysdeps/unix/sysv/linux/powerpc/bits/semaphore.h: New file.
* sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep-cancel.h: New file.
* sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep-cancel.h: New file.
Diffstat (limited to 'nptl/sysdeps/unix/sysv/linux/sem_post.c')
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/sem_post.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/nptl/sysdeps/unix/sysv/linux/sem_post.c b/nptl/sysdeps/unix/sysv/linux/sem_post.c new file mode 100644 index 0000000000..77defc84f9 --- /dev/null +++ b/nptl/sysdeps/unix/sysv/linux/sem_post.c @@ -0,0 +1,47 @@ +/* sem_post -- post to a POSIX semaphore. Generic futex-using version. + Copyright (C) 2003 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, 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 <semaphore.h> + +#include <shlib-compat.h> + +int +__new_sem_post (sem_t *sem) +{ + int *futex = (int *) sem; + int err, nr; + + __asm __volatile (__lll_rel_instr ::: "memory"); + nr = __lll_add (futex, 1); + err = lll_futex_wake (futex, nr); + if (err == 0) + return 0; + __set_errno (-err); + return -1; +} +versioned_symbol (libpthread, __new_sem_post, sem_post, GLIBC_2_1); +#if SHLIB_COMPAT (libpthread, GLIBC_2_0, GLIBC_2_1) +strong_alias (__new_sem_post, __old_sem_post) +compat_symbol (libpthread, __old_sem_post, sem_post, GLIBC_2_0); +#endif |