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- Subject: [PATCH] libpthread: AVR32 support
- Implement pt-machine.h for AVR32.
- ---
- libpthread/linuxthreads/sysdeps/avr32/pt-machine.h | 92 +++++++++++++++++++++
- 1 file changed, 92 insertions(+)
- Index: uClibc-0.9.28/libpthread/linuxthreads/sysdeps/avr32/pt-machine.h
- ===================================================================
- --- /dev/null 1970-01-01 00:00:00.000000000 +0000
- +++ uClibc-0.9.28/libpthread/linuxthreads/sysdeps/avr32/pt-machine.h 2006-02-07 17:14:47.000000000 +0100
- @@ -0,0 +1,92 @@
- +/* Machine-dependent pthreads configuration and inline functions.
- +
- + Copyright (C) 2005 Atmel Norway
- + This file is part of the GNU C Library.
- +
- + The GNU C Library is free software; you can redistribute it and/or
- + modify it under the terms of the GNU Lesser General Public License as
- + published by the Free Software Foundation; either version 2.1 of the
- + License, or (at your option) any later version.
- +
- + The GNU C Library is distributed in the hope that it will be useful,
- + but WITHOUT ANY WARRANTY; without even the implied warranty of
- + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- + Lesser General Public License for more details.
- +
- + You should have received a copy of the GNU Lesser General Public
- + License along with the GNU C Library; see the file COPYING.LIB. If not,
- + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- + Boston, MA 02111-1307, USA. */
- +
- +#ifndef _PT_MACHINE_H
- +#define _PT_MACHINE_H 1
- +
- +#include <features.h>
- +
- +static inline int
- +_test_and_set (int *p, int v) __THROW
- +{
- + int result;
- +
- + __asm__ __volatile__(
- + "/* Inline test and set */\n"
- + "1: ssrf 5\n"
- + " ld.w %0, %2\n"
- + " tst %0, %3\n"
- + " breq 2f\n"
- + " stcond %1, %3\n"
- + " brne 1b\n"
- + "2:"
- + : "=&r"(result), "=m"(*p)
- + : "m"(*p), "r"(v)
- + : "memory", "cc");
- +
- + return result;
- +}
- +
- +#ifndef PT_EI
- +# define PT_EI extern inline
- +#endif
- +
- +extern long int testandset (int *spinlock);
- +extern int __compare_and_swap (long int *p, long int oldval, long int newval);
- +
- +/* Spinlock implementation; required. */
- +PT_EI long int
- +testandset (int *spinlock)
- +{
- + return _test_and_set(spinlock, 1);
- +}
- +
- +
- +/* Get some notion of the current stack. Need not be exactly the top
- + of the stack, just something somewhere in the current frame. */
- +#define CURRENT_STACK_FRAME stack_pointer
- +register char * stack_pointer __asm__ ("sp");
- +
- +/* Compare-and-swap for semaphores. */
- +
- +#define HAS_COMPARE_AND_SWAP
- +PT_EI int
- +__compare_and_swap(long int *p, long int oldval, long int newval)
- +{
- + long int result, tmp;
- +
- + __asm__ __volatile__(
- + "/* Inline compare and swap */\n"
- + "1: ssrf 5\n"
- + " ld.w %1, %3\n"
- + " cp.w %1, %5\n"
- + " sreq %0\n"
- + " brne 2f\n"
- + " stcond %2, %4\n"
- + " brne 1b\n"
- + "2:"
- + : "=&r"(result), "=&r"(tmp), "=m"(*p)
- + : "m"(*p), "r"(newval), "r"(oldval)
- + : "cc", "memory");
- +
- + return result;
- +}
- +
- +#endif /* pt-machine.h */
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