1 /* Machine-dependent pthreads configuration and inline functions.
3 Copyright (C) 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
4 This file is part of the GNU C Library.
5 Contributed by Niibe Yutaka <gniibe@m17n.org>.
7 The GNU C Library is free software; you can redistribute it and/or
8 modify it under the terms of the GNU Library General Public License as
9 published by the Free Software Foundation; either version 2 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 Library General Public License for more details.
17 You should have received a copy of the GNU Library 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
26 # define PT_EI extern 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)
48 /* We want the OS to assign stack addresses. */
49 #define FLOATING_STACKS 1
51 /* Maximum size of the stack if the rlimit is unlimited. */
52 #define ARCH_STACK_MAX_SIZE 32*1024*1024
54 /* Get some notion of the current stack. Need not be exactly the top
55 of the stack, just something somewhere in the current frame. */
56 #define CURRENT_STACK_FRAME stack_pointer
57 register char * stack_pointer __asm__ ("r15");
59 /* Return the thread descriptor for the current thread. */
60 struct _pthread_descr_struct;
62 ({ struct _pthread_descr_struct *self; \
63 __asm__("stc gbr,%0" : "=r" (self)); self;})
65 /* Initialize the thread-unique value. */
66 #define INIT_THREAD_SELF(descr, nr) \
67 ({ __asm__ __volatile__("ldc %0,gbr" : : "r" (descr));})
69 /* Access to data in the thread descriptor is easy. */
70 #define THREAD_GETMEM(descr, member) THREAD_SELF->member
71 #define THREAD_GETMEM_NC(descr, member) THREAD_SELF->member
72 #define THREAD_SETMEM(descr, member, value) THREAD_SELF->member = (value)
73 #define THREAD_SETMEM_NC(descr, member, value) THREAD_SELF->member = (value)
75 #endif /* pt-machine.h */