diff options
Diffstat (limited to 'libpthread/nptl/sysdeps/unix/sysv/linux/or1k/bits/atomic.h')
| -rw-r--r-- | libpthread/nptl/sysdeps/unix/sysv/linux/or1k/bits/atomic.h | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/or1k/bits/atomic.h b/libpthread/nptl/sysdeps/unix/sysv/linux/or1k/bits/atomic.h new file mode 100644 index 000000000..43440dc3c --- /dev/null +++ b/libpthread/nptl/sysdeps/unix/sysv/linux/or1k/bits/atomic.h @@ -0,0 +1,128 @@ +/* Copyright (C) 2010-2012 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Maxim Kuvyrkov <maxim@codesourcery.com>, 2010. + + 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. If not, see + <http://www.gnu.org/licenses/>. */ + +#ifndef _BITS_ATOMIC_H +#define _BITS_ATOMIC_H 1 + +#include <stdint.h> + +/* This is needed to break a depencency loop, we do not need errno anyway */ +#ifndef _ERRNO_H +# define _ERRNO_H +# include <sysdep.h> +# undef _ERRNO_H +#else +# include <sysdep.h> +#endif + +/* Or1k has no atomic compare-and-exchange operation, but the + kernel provides userspace atomicity operations. Use them. */ + +typedef int32_t atomic32_t; +typedef uint32_t uatomic32_t; +typedef int_fast32_t atomic_fast32_t; +typedef uint_fast32_t uatomic_fast32_t; + +typedef intptr_t atomicptr_t; +typedef uintptr_t uatomicptr_t; +typedef intmax_t atomic_max_t; +typedef uintmax_t uatomic_max_t; + +/* TODO: Move these to a kernel header */ +#define OR1K_ATOMIC_SWAP 1 +#define OR1K_ATOMIC_CMPXCHG 2 +#define OR1K_ATOMIC_XCHG 3 +#define OR1K_ATOMIC_ADD 4 +#define OR1K_ATOMIC_DECPOS 5 +#define OR1K_ATOMIC_AND 6 +#define OR1K_ATOMIC_OR 7 +#define OR1K_ATOMIC_UMAX 8 +#define OR1K_ATOMIC_UMIN 9 + +#define atomic_compare_and_exchange_val_acq(mem, newval, oldval) \ + ((__typeof (*(mem))) ((sizeof (*(mem)) == 4) ? \ + INTERNAL_SYSCALL (or1k_atomic, , 4, \ + OR1K_ATOMIC_CMPXCHG, mem, oldval, newval) \ + : __atomic_error_bad_argument_size ())) + +#define atomic_exchange_acq(mem, newval) \ + ((__typeof (*(mem))) ((sizeof (*(mem)) == 4) ? \ + INTERNAL_SYSCALL (or1k_atomic, , 3, \ + OR1K_ATOMIC_XCHG, mem, newval) \ + : __atomic_error_bad_argument_size ())) + +#define atomic_exchange_and_add_acq(mem, val) \ + ((__typeof (*(mem))) ((sizeof (*(mem)) == 4) ? \ + INTERNAL_SYSCALL (or1k_atomic, , 3, \ + OR1K_ATOMIC_ADD, mem, val) \ + : __atomic_error_bad_argument_size ())) + +#define atomic_decrement_if_positive(mem) \ + ((__typeof (*(mem))) ((sizeof (*(mem)) == 4) ? \ + INTERNAL_SYSCALL (or1k_atomic, , 2, \ + OR1K_ATOMIC_DECPOS, mem) \ + : __atomic_error_bad_argument_size ())) + +#define atomic_and_val(mem, mask) \ + ((__typeof (*(mem))) ((sizeof (*(mem)) == 4) ? \ + INTERNAL_SYSCALL (or1k_atomic, , 3, \ + OR1K_ATOMIC_AND, mem, mask) \ + : __atomic_error_bad_argument_size ())) + +#define atomic_or_val(mem, mask) \ + ((__typeof (*(mem))) ((sizeof (*(mem)) == 4) ? \ + INTERNAL_SYSCALL (or1k_atomic, , 3, \ + OR1K_ATOMIC_OR, mem, mask) \ + : __atomic_error_bad_argument_size ())) + +#define atomic_max_val(mem, val) \ + ((__typeof (*(mem))) ((sizeof (*(mem)) == 4) ? \ + INTERNAL_SYSCALL (or1k_atomic, , 3, \ + OR1K_ATOMIC_UMAX, mem, val) \ + : __atomic_error_bad_argument_size ())) + +#define atomic_min_val(mem, val) \ + ((__typeof (*(mem))) ((sizeof (*(mem)) == 4) ? \ + INTERNAL_SYSCALL (or1k_atomic, , 3, \ + OR1K_ATOMIC_UMIN, mem, val) \ + : __atomic_error_bad_argument_size ())) + + +/* atomic_bit_test_set in terms of atomic_or_val. */ +#define atomic_bit_test_set(mem, bit) \ + ({ __typeof (*(mem)) __att0_mask = ((__typeof (*(mem))) 1 << (bit)); \ + atomic_or_val ((mem), __att0_mask) & __att0_mask; }) + +/* Various macros that should just be synonyms. */ +#define catomic_exchange_and_add atomic_exchange_and_add +#define atomic_and(mem, mask) ((void) atomic_and_val ((mem), (mask))) +#define catomic_and atomic_and +#define atomic_or(mem, mask) ((void) atomic_or_val ((mem), (mask))) +#define catomic_or atomic_or +#define atomic_max(mem, val) ((void)atomic_max_val ((mem), (val))) +#define catomic_max atomic_max +#define atomic_min(mem, val) ((void)atomic_min_val ((mem), (val))) +#define catomic_min atomic_min +/* + * This non-existent symbol is called for unsupporrted sizes, + * indicating a bug in the caller. + */ +extern int __atomic_error_bad_argument_size(void) + __attribute__ ((error ("bad sizeof atomic argument"))); + +#endif |