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git.ipfire.org Git - thirdparty/glibc.git/blob - linuxthreads/sysdeps/hppa/pt-machine.h
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 not,
19 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
23 #define _PT_MACHINE_H 1
25 #include <bits/initspin.h>
28 # define PT_EI extern inline __attribute__ ((always_inline))
31 extern long int testandset (int *spinlock
);
32 extern int __compare_and_swap (long int *p
, long int oldval
, long int newval
);
34 /* Get some notion of the current stack. Need not be exactly the top
35 of the stack, just something somewhere in the current frame. */
36 #define CURRENT_STACK_FRAME stack_pointer
37 register char * stack_pointer
__asm__ ("%r30");
40 /* The hppa only has one atomic read and modify memory operation,
41 load and clear, so hppa spinlocks must use zero to signify that
42 someone is holding the lock. */
44 #define xstr(s) str(s)
46 /* Spinlock implementation; required. */
48 testandset (int *spinlock
)
54 : "=r"(ret
), "=m"(*spinlock
)
62 #endif /* pt-machine.h */