diff options
Diffstat (limited to 'libpthread/linuxthreads/sysdeps/sparc/sparc32/sparcv9')
4 files changed, 99 insertions, 0 deletions
diff --git a/libpthread/linuxthreads/sysdeps/sparc/sparc32/sparcv9/CVS/Entries b/libpthread/linuxthreads/sysdeps/sparc/sparc32/sparcv9/CVS/Entries new file mode 100644 index 000000000..6a76bc542 --- /dev/null +++ b/libpthread/linuxthreads/sysdeps/sparc/sparc32/sparcv9/CVS/Entries @@ -0,0 +1,3 @@ +/Versions/1.1/Tue Nov 15 14:20:47 2005// +/pspinlock.c/1.4/Tue Nov 15 14:20:47 2005// +D diff --git a/libpthread/linuxthreads/sysdeps/sparc/sparc32/sparcv9/CVS/Repository b/libpthread/linuxthreads/sysdeps/sparc/sparc32/sparcv9/CVS/Repository new file mode 100644 index 000000000..73a5bbb95 --- /dev/null +++ b/libpthread/linuxthreads/sysdeps/sparc/sparc32/sparcv9/CVS/Repository @@ -0,0 +1 @@ +ports/linuxthreads/sysdeps/sparc/sparc32/sparcv9 diff --git a/libpthread/linuxthreads/sysdeps/sparc/sparc32/sparcv9/CVS/Root b/libpthread/linuxthreads/sysdeps/sparc/sparc32/sparcv9/CVS/Root new file mode 100644 index 000000000..ca45c5d4d --- /dev/null +++ b/libpthread/linuxthreads/sysdeps/sparc/sparc32/sparcv9/CVS/Root @@ -0,0 +1 @@ +:pserver:anoncvs@sources.redhat.com:/cvs/glibc diff --git a/libpthread/linuxthreads/sysdeps/sparc/sparc32/sparcv9/pspinlock.c b/libpthread/linuxthreads/sysdeps/sparc/sparc32/sparcv9/pspinlock.c new file mode 100644 index 000000000..04f588bed --- /dev/null +++ b/libpthread/linuxthreads/sysdeps/sparc/sparc32/sparcv9/pspinlock.c @@ -0,0 +1,94 @@ +/* POSIX spinlock implementation. SPARC v9 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, + 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" + + +/* 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" + " brnz,pn %%g2, 2f\n" + " membar #StoreLoad | #StoreStore\n" + ".subsection 2\n" + "2: ldub [%0], %%g2\n" + " brnz,pt %%g2, 2b\n" + " membar #LoadLoad\n" + " b,a,pt %%xcc, 1b\n" + ".previous" + : /* no outputs */ + : "r" (lock) + : "g2", "memory"); + 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\n" + "membar #StoreLoad | #StoreStore" + : "=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) +{ + asm volatile + ("membar #StoreStore | #LoadStore\n" + "stb %%g0, [%0]" + : + : "r" (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) |