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authorMike Frysinger <vapier@gentoo.org>2006-01-31 05:05:15 +0000
committerMike Frysinger <vapier@gentoo.org>2006-01-31 05:05:15 +0000
commitcccc549ced940c85039c8ce263c8bb571f244afd (patch)
treeef77a870db7211ad6f511867fc56ee1a1a8b4c18 /libpthread/linuxthreads/sysdeps/hppa/pt-machine.h
parente73b1211737842732951f9b9049294ef732e1ef0 (diff)
initial import of latest linuxthreads
Diffstat (limited to 'libpthread/linuxthreads/sysdeps/hppa/pt-machine.h')
-rw-r--r--libpthread/linuxthreads/sysdeps/hppa/pt-machine.h62
1 files changed, 62 insertions, 0 deletions
diff --git a/libpthread/linuxthreads/sysdeps/hppa/pt-machine.h b/libpthread/linuxthreads/sysdeps/hppa/pt-machine.h
new file mode 100644
index 000000000..abc25c4ca
--- /dev/null
+++ b/libpthread/linuxthreads/sysdeps/hppa/pt-machine.h
@@ -0,0 +1,62 @@
+/* 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,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#ifndef _PT_MACHINE_H
+#define _PT_MACHINE_H 1
+
+#include <bits/initspin.h>
+
+#ifndef PT_EI
+# define PT_EI extern inline __attribute__ ((always_inline))
+#endif
+
+extern long int testandset (int *spinlock);
+extern int __compare_and_swap (long int *p, long int oldval, long int newval);
+
+/* 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 */