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git.ipfire.org Git - thirdparty/glibc.git/blob - linuxthreads/sysdeps/m68k/pt-machine.h
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
26 # define PT_EI extern inline __attribute__ ((always_inline))
29 extern long int testandset (int *spinlock
);
30 extern int __compare_and_swap (long int *p
, long int oldval
, long int newval
);
32 /* Spinlock implementation; required. */
34 testandset (int *spinlock
)
38 __asm__
__volatile__("tas %1; sne %0"
39 : "=dm"(ret
), "=m"(*spinlock
)
47 /* Get some notion of the current stack. Need not be exactly the top
48 of the stack, just something somewhere in the current frame. */
49 #define CURRENT_STACK_FRAME stack_pointer
50 register char * stack_pointer
__asm__ ("%sp");
53 /* Compare-and-swap for semaphores. */
55 #define HAS_COMPARE_AND_SWAP
57 __compare_and_swap (long int *p
, long int oldval
, long int newval
)
62 __asm__
__volatile__ ("casl %2, %3, %1; seq %0"
63 : "=dm" (ret
), "=m" (*p
), "=d" (readval
)
64 : "d" (newval
), "m" (*p
), "2" (oldval
));
69 #endif /* pt-machine.h */