diff options
Diffstat (limited to 'libpthread/linuxthreads.old/sysdeps/hppa')
-rw-r--r-- | libpthread/linuxthreads.old/sysdeps/hppa/pspinlock.c | 80 | ||||
-rw-r--r-- | libpthread/linuxthreads.old/sysdeps/hppa/pt-machine.h | 59 |
2 files changed, 139 insertions, 0 deletions
diff --git a/libpthread/linuxthreads.old/sysdeps/hppa/pspinlock.c b/libpthread/linuxthreads.old/sysdeps/hppa/pspinlock.c new file mode 100644 index 000000000..1a6aa64a9 --- /dev/null +++ b/libpthread/linuxthreads.old/sysdeps/hppa/pspinlock.c @@ -0,0 +1,80 @@ +/* POSIX spinlock implementation. hppa version. + Copyright (C) 2000 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 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" + +int +__pthread_spin_lock (pthread_spinlock_t *lock) +{ + unsigned int val; + + do + __asm__ __volatile__ ("ldcw %1,%0" + : "=r" (val), "=m" (*lock) + : "m" (*lock)); + while (!val); + + return 0; +} +weak_alias (__pthread_spin_lock, pthread_spin_lock) + + +int +__pthread_spin_trylock (pthread_spinlock_t *lock) +{ + unsigned int val; + + __asm__ __volatile__ ("ldcw %1,%0" + : "=r" (val), "=m" (*lock) + : "m" (*lock)); + + return val ? 0 : EBUSY; +} +weak_alias (__pthread_spin_trylock, pthread_spin_trylock) + + +int +__pthread_spin_unlock (pthread_spinlock_t *lock) +{ + *lock = 1; + 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 = 1; + 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) diff --git a/libpthread/linuxthreads.old/sysdeps/hppa/pt-machine.h b/libpthread/linuxthreads.old/sysdeps/hppa/pt-machine.h new file mode 100644 index 000000000..85c453c77 --- /dev/null +++ b/libpthread/linuxthreads.old/sysdeps/hppa/pt-machine.h @@ -0,0 +1,59 @@ +/* Machine-dependent pthreads configuration and inline functions. + hppa version. + Copyright (C) 2000, 2002, 2003 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Richard Henderson <rth@tamu.edu>. + + 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/>. */ + +#ifndef _PT_MACHINE_H +#define _PT_MACHINE_H 1 + +#include <features.h> +#include <bits/initspin.h> + +#ifndef PT_EI +# define PT_EI __extern_always_inline +#endif + +/* Get some notion of the current stack. Need not be exactly the top + of the stack, just something somewhere in the current frame. */ +#define CURRENT_STACK_FRAME stack_pointer +register char * stack_pointer __asm__ ("%r30"); + + +/* The hppa only has one atomic read and modify memory operation, + load and clear, so hppa spinlocks must use zero to signify that + someone is holding the lock. */ + +#define xstr(s) str(s) +#define str(s) #s +/* Spinlock implementation; required. */ +PT_EI long int +testandset (int *spinlock) +{ + int ret; + + __asm__ __volatile__( + "ldcw 0(%2),%0" + : "=r"(ret), "=m"(*spinlock) + : "r"(spinlock)); + + return ret == 0; +} +#undef str +#undef xstr + +#endif /* pt-machine.h */ |