1 /* Machine-dependent pthreads configuration and inline functions.
3 Copyright (C) 1996, 1998, 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, write to the Free Software Foundation, Inc.,
20 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
23 #define _PT_MACHINE_H 1
28 # define PT_EI __extern_always_inline
31 /* Spinlock implementation; required. */
33 testandset (int *spinlock)
38 #if !defined(__mcoldfire__) && !defined(__mcf5200__) && !defined(__m68000)
43 : "=&dm"(ret), "=m"(*spinlock)
51 /* Get some notion of the current stack. Need not be exactly the top
52 of the stack, just something somewhere in the current frame. */
53 #define CURRENT_STACK_FRAME stack_pointer
54 register char * stack_pointer __asm__ ("%sp");
57 /* Compare-and-swap for semaphores. */
59 #if !defined(__mcoldfire__) && !defined(__mcf5200__) && !defined(__mc68000)
60 #define HAS_COMPARE_AND_SWAP
62 __compare_and_swap (long int *p, long int oldval, long int newval)
67 __asm__ __volatile__ ("casl %2, %3, %1; seq %0"
68 : "=dm" (ret), "=m" (*p), "=d" (readval)
69 : "d" (newval), "m" (*p), "2" (oldval));
75 #endif /* pt-machine.h */