diff options
Diffstat (limited to 'include/atomic.h')
| -rw-r--r-- | include/atomic.h | 82 |
1 files changed, 79 insertions, 3 deletions
diff --git a/include/atomic.h b/include/atomic.h index 8a23f6ee9e..d44728b215 100644 --- a/include/atomic.h +++ b/include/atomic.h @@ -1,5 +1,5 @@ /* Internal macros for atomic operations for GNU C Library. - Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc. + Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. @@ -108,7 +108,7 @@ __typeof (*(mem)) __value = (newvalue); \ \ do \ - __oldval = (*__memp); \ + __oldval = *__memp; \ while (__builtin_expect (atomic_compare_and_exchange_bool_acq (__memp, \ __value, \ __oldval),\ @@ -130,7 +130,7 @@ __typeof (*(mem)) __value = (value); \ \ do \ - __oldval = (*__memp); \ + __oldval = *__memp; \ while (__builtin_expect (atomic_compare_and_exchange_bool_acq (__memp, \ __oldval \ + __value,\ @@ -141,6 +141,41 @@ #endif + +#ifndef atomic_max +# define atomic_max(mem, value) \ + do { \ + __typeof (*(mem)) __oldval; \ + __typeof (mem) __memp = (mem); \ + __typeof (*(mem)) __value = (value); \ + do { \ + __oldval = *__memp; \ + if (__oldval >= __value) \ + break; \ + } while (__builtin_expect (atomic_compare_and_exchange_bool_acq (__memp, \ + __value, \ + __oldval),\ + 0)); \ + } while (0) +#endif + +#ifndef atomic_min +# define atomic_min(mem, value) \ + do { \ + __typeof (*(mem)) __oldval; \ + __typeof (mem) __memp = (mem); \ + __typeof (*(mem)) __value = (value); \ + do { \ + __oldval = *__memp; \ + if (__oldval <= __value) \ + break; \ + } while (__builtin_expect (atomic_compare_and_exchange_bool_acq (__memp, \ + __value, \ + __oldval),\ + 0)); \ + } while (0) +#endif + #ifndef atomic_add # define atomic_add(mem, value) (void) atomic_exchange_and_add ((mem), (value)) #endif @@ -238,6 +273,41 @@ __oldval & __mask; }) #endif +/* Atomically *mem &= mask and return the old value of *mem. */ +#ifndef atomic_and +# define atomic_and(mem, mask) \ + ({ __typeof (*(mem)) __oldval; \ + __typeof (mem) __memp = (mem); \ + __typeof (*(mem)) __mask = (mask); \ + \ + do \ + __oldval = (*__memp); \ + while (__builtin_expect (atomic_compare_and_exchange_bool_acq (__memp, \ + __oldval \ + & __mask, \ + __oldval),\ + 0)); \ + \ + __oldval; }) +#endif + +/* Atomically *mem |= mask and return the old value of *mem. */ +#ifndef atomic_or +# define atomic_or(mem, mask) \ + ({ __typeof (*(mem)) __oldval; \ + __typeof (mem) __memp = (mem); \ + __typeof (*(mem)) __mask = (mask); \ + \ + do \ + __oldval = (*__memp); \ + while (__builtin_expect (atomic_compare_and_exchange_bool_acq (__memp, \ + __oldval \ + | __mask, \ + __oldval),\ + 0)); \ + \ + __oldval; }) +#endif #ifndef atomic_full_barrier # define atomic_full_barrier() __asm ("" ::: "memory") @@ -254,6 +324,12 @@ #endif +#ifndef atomic_forced_read +# define atomic_forced_read(x) \ + ({ __typeof (x) __x; __asm ("" : "=r" (__x) : "0" (x)); __x; }) +#endif + + #ifndef atomic_delay # define atomic_delay() do { /* nothing */ } while (0) #endif |