diff options
Diffstat (limited to 'linuxthreads')
| -rw-r--r-- | linuxthreads/ChangeLog | 9 | ||||
| -rw-r--r-- | linuxthreads/shlib-versions | 1 | ||||
| -rw-r--r-- | linuxthreads/sysdeps/cris/pspinlock.c | 72 | ||||
| -rw-r--r-- | linuxthreads/sysdeps/cris/pt-machine.h | 50 |
4 files changed, 132 insertions, 0 deletions
diff --git a/linuxthreads/ChangeLog b/linuxthreads/ChangeLog index be532d55f1..de4047c5ac 100644 --- a/linuxthreads/ChangeLog +++ b/linuxthreads/ChangeLog @@ -1,3 +1,12 @@ +2001-04-08 Hans-Peter Nilsson <hp@axis.com> + + * sysdeps/cris/pt-machine.h: New file. + * sysdeps/cris/pspinlock.c: New file. + +2001-04-09 Hans-Peter Nilsson <hp@axis.com> + + * shlib-versions: Add case for Linux on CRIS. + 2001-03-26 Ulrich Drepper <drepper@redhat.com> * attr.c (pthread_getattr_np): Correct computation of stack size diff --git a/linuxthreads/shlib-versions b/linuxthreads/shlib-versions index 91d9ccf74f..caa3c05dee 100644 --- a/linuxthreads/shlib-versions +++ b/linuxthreads/shlib-versions @@ -5,4 +5,5 @@ sh.*-.*-linux.* libpthread=0 GLIBC_2.2 ia64.*-.*-linux.* libpthread=0 GLIBC_2.2 hppa.*-.*-linux.* libpthread=0 GLIBC_2.2 s390x-.*-linux.* libpthread=0 GLIBC_2.2 +cris-.*-linux.* libpthread=0 GLIBC_2.2 .*-.*-linux.* libpthread=0 diff --git a/linuxthreads/sysdeps/cris/pspinlock.c b/linuxthreads/sysdeps/cris/pspinlock.c new file mode 100644 index 0000000000..ff73d8337f --- /dev/null +++ b/linuxthreads/sysdeps/cris/pspinlock.c @@ -0,0 +1,72 @@ +/* POSIX spinlock implementation. CRIS version. + Copyright (C) 2000, 2001 Free Software Foundation, Inc. + 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 Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <errno.h> +#include <pthread.h> +#include "internals.h" + +/* FIXME: These are just dummies. I don't know why or if they're needed; + configury should default to these definitions. We just follow the + crowd here. */ + +int +__pthread_spin_lock (pthread_spinlock_t *lock) +{ + while (testandset (lock) != 0) + ; + + return 0; +} +weak_alias (__pthread_spin_lock, pthread_spin_lock) + + +int +__pthread_spin_trylock (pthread_spinlock_t *lock) +{ + return testandset (lock) != 0 ? EBUSY : 0; +} +weak_alias (__pthread_spin_trylock, pthread_spin_trylock) + + +int +__pthread_spin_unlock (pthread_spinlock_t *lock) +{ + return *lock = 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. */ + return *lock = 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) diff --git a/linuxthreads/sysdeps/cris/pt-machine.h b/linuxthreads/sysdeps/cris/pt-machine.h new file mode 100644 index 0000000000..9f9739492a --- /dev/null +++ b/linuxthreads/sysdeps/cris/pt-machine.h @@ -0,0 +1,50 @@ +/* Machine-dependent pthreads configuration and inline functions. + CRIS version. + Copyright (C) 2001 Free Software Foundation, Inc. + 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 Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#ifndef PT_EI +# define PT_EI extern inline +#endif + +PT_EI long int +testandset (int *spinlock) +{ + register unsigned long int ret; + + /* Note the use of a dummy output of *spinlock to expose the write. The + memory barrier is to stop *other* writes being moved past this code. */ + __asm__ __volatile__("clearf\n" + "0:\n\t" + "movu.b [%2],%0\n\t" + "ax\n\t" + "move.b %3,[%2]\n\t" + "bwf 0b\n\t" + "clearf" + : "=&r" (ret), "=m" (*spinlock) + : "r" (spinlock), "r" ((int) 1) + : "memory"); + return ret; +} + + +/* Get some notion of the current stack. Need not be exactly the top + of the stack, just something somewhere in the current frame. + I don't trust register variables, so let's do this the safe way. */ +#define CURRENT_STACK_FRAME \ + ({ char *sp; __asm__ ("move.d $sp,%0" : "=rm" (sp)); sp; }) |