summaryrefslogtreecommitdiff
path: root/libpthread/linuxthreads/sysdeps/s390/pspinlock.c
diff options
context:
space:
mode:
authorWaldemar Brodkorb <wbx@openadk.org>2014-09-06 14:45:42 +0200
committerWaldemar Brodkorb <wbx@openadk.org>2014-09-20 22:10:06 +0200
commit481de81559b8c58c7745a29d560c304a0f6c2658 (patch)
treea937377958e858caf35c8c30c38c1ad532a771db /libpthread/linuxthreads/sysdeps/s390/pspinlock.c
parenta22a0030f32b828c0f2e804d1ed1fe567ddab680 (diff)
linuxthreads: remove unused s390 code
Cleanup linuxthreads by removing unused s390 code. Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
Diffstat (limited to 'libpthread/linuxthreads/sysdeps/s390/pspinlock.c')
-rw-r--r--libpthread/linuxthreads/sysdeps/s390/pspinlock.c90
1 files changed, 0 insertions, 90 deletions
diff --git a/libpthread/linuxthreads/sysdeps/s390/pspinlock.c b/libpthread/linuxthreads/sysdeps/s390/pspinlock.c
deleted file mode 100644
index be7578642..000000000
--- a/libpthread/linuxthreads/sysdeps/s390/pspinlock.c
+++ /dev/null
@@ -1,90 +0,0 @@
-/* POSIX spinlock implementation. S/390 version.
- Copyright (C) 2000, 2004 Free Software Foundation, Inc.
- Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
- This file is part of the GNU C Library.
-
- 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; see the file COPYING.LIB. If
- not, see <http://www.gnu.org/licenses/>. */
-
-#include <errno.h>
-#include <pthread.h>
-#include "internals.h"
-
-/* This implementation is similar to the one used in the Linux kernel.
- But the kernel is byte instructions for the memory access. This is
- faster but unusable here. The problem is that only 128
- threads/processes could use the spinlock at the same time. If (by
- a design error in the program) a thread/process would hold the
- spinlock for a time long enough to accumulate 128 waiting
- processes, the next one will find a positive value in the spinlock
- and assume it is unlocked. We cannot accept that. */
-
-int
-__pthread_spin_lock (pthread_spinlock_t *lock)
-{
- __asm__ __volatile__(" basr 1,0\n"
- "0: slr 0,0\n"
- " cs 0,1,%1\n"
- " jl 0b\n"
- : "=m" (*lock)
- : "m" (*lock) : "0", "1", "cc" );
- return 0;
-}
-weak_alias (__pthread_spin_lock, pthread_spin_lock)
-
-int
-__pthread_spin_trylock (pthread_spinlock_t *lock)
-{
- int oldval;
-
- __asm__ __volatile__(" slr %1,%1\n"
- " basr 1,0\n"
- "0: cs %1,1,%0"
- : "=m" (*lock), "=&d" (oldval)
- : "m" (*lock) : "1", "cc" );
- return oldval == 0 ? 0 : EBUSY;
-}
-weak_alias (__pthread_spin_trylock, pthread_spin_trylock)
-
-
-int
-__pthread_spin_unlock (pthread_spinlock_t *lock)
-{
- __asm__ __volatile__(" xc 0(4,%0),0(%0)\n"
- " bcr 15,0"
- : : "a" (lock) : "memory" );
- return 0;
-}
-weak_alias (__pthread_spin_unlock, pthread_spin_unlock)
-
-
-int
-__pthread_spin_init (pthread_spinlock_t *lock, int pshared)
-{
- /* We can ignore the `pshared' parameter. Since we are busy-waiting
- all processes which can access the memory location `lock' points
- to can use the spinlock. */
- *lock = 0;
- return 0;
-}
-weak_alias (__pthread_spin_init, pthread_spin_init)
-
-
-int
-__pthread_spin_destroy (pthread_spinlock_t *lock)
-{
- /* Nothing to do. */
- return 0;
-}
-weak_alias (__pthread_spin_destroy, pthread_spin_destroy)