diff options
author | Waldemar Brodkorb <wbx@openadk.org> | 2014-09-06 14:45:42 +0200 |
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committer | Waldemar Brodkorb <wbx@openadk.org> | 2014-09-20 22:10:06 +0200 |
commit | 481de81559b8c58c7745a29d560c304a0f6c2658 (patch) | |
tree | a937377958e858caf35c8c30c38c1ad532a771db /libpthread/linuxthreads/sysdeps/s390/pspinlock.c | |
parent | a22a0030f32b828c0f2e804d1ed1fe567ddab680 (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.c | 90 |
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) |