1 /* Machine-dependent pthreads configuration and inline functions.
3 Copyright (C) 2000, 2002, 2003 Free Software Foundation, Inc.
4 This file is part of the GNU C Library.
5 Contributed by Richard Henderson <rth@tamu.edu>.
7 The GNU C Library is free software; you can redistribute it and/or
8 modify it under the terms of the GNU Lesser General Public License as
9 published by the Free Software Foundation; either version 2.1 of the
10 License, or (at your option) any later version.
12 The GNU C Library is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Lesser General Public License for more details.
17 You should have received a copy of the GNU Lesser General Public
18 License along with the GNU C Library; see the file COPYING.LIB. If
19 not, see <http://www.gnu.org/licenses/>. */
22 #define _PT_MACHINE_H 1
25 #include <bits/initspin.h>
28 # define PT_EI __extern_always_inline
31 /* Get some notion of the current stack. Need not be exactly the top
32 of the stack, just something somewhere in the current frame. */
33 #define CURRENT_STACK_FRAME stack_pointer
34 register char * stack_pointer __asm__ ("%r30");
37 /* The hppa only has one atomic read and modify memory operation,
38 load and clear, so hppa spinlocks must use zero to signify that
39 someone is holding the lock. */
41 #define xstr(s) str(s)
43 /* Spinlock implementation; required. */
45 testandset (int *spinlock)
51 : "=r"(ret), "=m"(*spinlock)
59 #endif /* pt-machine.h */