diff options
author | Waldemar Brodkorb <wbx@openadk.org> | 2014-09-01 20:44:20 +0200 |
---|---|---|
committer | Bernhard Reutner-Fischer <rep.dot.nop@gmail.com> | 2014-09-04 13:56:34 +0200 |
commit | 6d550ddd129b18cf800eab604f74536754526cd8 (patch) | |
tree | a6c883676885f2e30878cdc3a0964db2e60322be /libpthread/linuxthreads/sysdeps/sparc/pspinlock.c | |
parent | b212e3804fb155cb418852dd70abad9a3d2354cc (diff) |
sparc: remove sparc64/sparcv9 code
The sparc64/sparcv9 code is incomplete. Furthermore there is
no real embedded hardware for sparc64 available, so better remove
it until someone comes up with a complete port.
Signed-off-by: Waldemar Brodkorb <wbx@openadk.org>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
Diffstat (limited to 'libpthread/linuxthreads/sysdeps/sparc/pspinlock.c')
-rw-r--r-- | libpthread/linuxthreads/sysdeps/sparc/pspinlock.c | 95 |
1 files changed, 84 insertions, 11 deletions
diff --git a/libpthread/linuxthreads/sysdeps/sparc/pspinlock.c b/libpthread/linuxthreads/sysdeps/sparc/pspinlock.c index 72a9af5b1..4de152be3 100644 --- a/libpthread/linuxthreads/sysdeps/sparc/pspinlock.c +++ b/libpthread/linuxthreads/sysdeps/sparc/pspinlock.c @@ -1,14 +1,87 @@ -#include <features.h> -#include <bits/wordsize.h> +/* POSIX spinlock implementation. SPARC32 version. + Copyright (C) 2000 Free Software Foundation, Inc. + This file is part of the GNU C Library. -#if __WORDSIZE == 32 + 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. -# if defined(__CONFIG_SPARC_V9B__) -# include "sparc32/sparcv9b/pspinlock.c" -# else -# include "sparc32/pspinlock.c" -# endif + 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. -#else -# include "sparc64/pspinlock.c" -#endif + 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. */ +int +__pthread_spin_lock (pthread_spinlock_t *lock) +{ + __asm__ __volatile__ + ("1: ldstub [%0], %%g2\n" + " orcc %%g2, 0x0, %%g0\n" + " bne,a 2f\n" + " ldub [%0], %%g2\n" + ".subsection 2\n" + "2: orcc %%g2, 0x0, %%g0\n" + " bne,a 2b\n" + " ldub [%0], %%g2\n" + " b,a 1b\n" + ".previous" + : /* no outputs */ + : "r" (lock) + : "g2", "memory", "cc"); + return 0; +} +weak_alias (__pthread_spin_lock, pthread_spin_lock) + + +int +__pthread_spin_trylock (pthread_spinlock_t *lock) +{ + int result; + __asm__ __volatile__ + ("ldstub [%1], %0" + : "=r" (result) + : "r" (lock) + : "memory"); + return result == 0 ? 0 : EBUSY; +} +weak_alias (__pthread_spin_trylock, pthread_spin_trylock) + + +int +__pthread_spin_unlock (pthread_spinlock_t *lock) +{ + *lock = 0; + 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) |