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-rw-r--r--include/atomic.h82
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