diff options
author | Waldemar Brodkorb <wbx@openadk.org> | 2015-02-14 23:04:02 -0600 |
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committer | Waldemar Brodkorb <wbx@openadk.org> | 2015-02-14 23:04:02 -0600 |
commit | e1e46622ac0fce73d802fa4a8a2e83cc25cd9e7a (patch) | |
tree | 2c8d14e4dcc733f4227f0984ed05da5826b13acd /libpthread/linuxthreads.old/sysdeps/avr32 | |
parent | 6b6ede3d15f04fe825cfa9f697507457e3640344 (diff) |
Revert "resolve merge"
This reverts commit 6b6ede3d15f04fe825cfa9f697507457e3640344.
Diffstat (limited to 'libpthread/linuxthreads.old/sysdeps/avr32')
-rw-r--r-- | libpthread/linuxthreads.old/sysdeps/avr32/pt-machine.h | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/libpthread/linuxthreads.old/sysdeps/avr32/pt-machine.h b/libpthread/linuxthreads.old/sysdeps/avr32/pt-machine.h new file mode 100644 index 000000000..5735d0ea2 --- /dev/null +++ b/libpthread/linuxthreads.old/sysdeps/avr32/pt-machine.h @@ -0,0 +1,73 @@ +/* Machine-dependent pthreads configuration and inline functions. + * + * Copyright (C) 2005-2007 Atmel Corporation + * + * This file is subject to the terms and conditions of the GNU Lesser General + * Public License. See the file "COPYING.LIB" in the main directory of this + * archive for more details. + */ +#ifndef _PT_MACHINE_H +#define _PT_MACHINE_H 1 + +#include <features.h> + +#ifndef PT_EI +# define PT_EI __extern_always_inline +#endif + +static __inline__ int +_test_and_set (int *p, int v) +{ + int result; + + __asm__ __volatile__( + "/* Inline test and set */\n" + " xchg %[old], %[mem], %[new]" + : [old] "=&r"(result) + : [mem] "r"(p), [new] "r"(v) + : "memory"); + + return result; +} + +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; + + __asm__ __volatile__( + "/* Inline compare and swap */\n" + "1: ssrf 5\n" + " ld.w %[result], %[mem]\n" + " eor %[result], %[old]\n" + " brne 2f\n" + " stcond %[mem], %[new]\n" + " brne 1b\n" + "2:" + : [result] "=&r"(result), [mem] "=m"(*p) + : "m"(*p), [new] "r"(newval), [old] "r"(oldval) + : "cc", "memory"); + + return result == 0; +} + +#endif /* pt-machine.h */ |