1 /* Machine-dependent pthreads configuration and inline functions.
3 Copyright (C) 1996, 1997, 1998, 2000, 2002, 2003, 2004
4 Free Software Foundation, Inc.
5 This file is part of the GNU C Library.
6 Contributed by Ralf Baechle <ralf@gnu.org>.
7 Based on the Alpha version by Richard Henderson <rth@tamu.edu>.
9 The GNU C Library is free software; you can redistribute it and/or
10 modify it under the terms of the GNU Lesser General Public License as
11 published by the Free Software Foundation; either version 2.1 of the
12 License, or (at your option) any later version.
14 The GNU C Library is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 Lesser General Public License for more details.
19 You should have received a copy of the GNU Lesser General Public
20 License along with the GNU C Library; see the file COPYING.LIB. If
21 not, see <http://www.gnu.org/licenses/>. */
24 #define _PT_MACHINE_H 1
29 # define PT_EI __extern_always_inline
32 /* Copyright (C) 2000, 2002 Free Software Foundation, Inc.
33 This file is part of the GNU C Library.
34 Contributed by Maciej W. Rozycki <macro@ds2.pg.gda.pl>, 2000. */
36 __NTH (_test_and_set (int *p, int v))
41 ("/* Inline test and set */\n"
52 "/* End test and set */"
53 : "=&r" (r), "=&r" (t), "=m" (*p)
61 /* Spinlock implementation; required. */
64 testandset (int *spinlock)
66 return _test_and_set (spinlock, 1);
70 /* Get some notion of the current stack. Need not be exactly the top
71 of the stack, just something somewhere in the current frame. */
72 #define CURRENT_STACK_FRAME stack_pointer
73 register char * stack_pointer __asm__ ("$29");
76 /* Compare-and-swap for semaphores. */
78 #define HAS_COMPARE_AND_SWAP
80 __compare_and_swap (long int *p, long int oldval, long int newval)
85 ("/* Inline compare & swap */\n"
97 "/* End compare & swap */"
98 : "=&r" (ret), "=&r" (temp), "=m" (*p)
99 : "r" (oldval), "r" (newval), "m" (*p)
105 #endif /* pt-machine.h */