* include/atomic.h (atomic_increment_and_test): Invert sense of test.

	Add comment.
	(atomic_decrement_and_test): Add comment.

2003-03-22  Jakub Jelinek  <jakub@redhat.com>

	* include/atomic.h (atomic_compare_and_exchange_val_acq): Add comment.
	Don't define if __arch_compare_and_exchange_val_32_acq is not defined.
	(atomic_compare_and_exchange_bool_acq): Add comment.  Don't use
	__oldval variable in the macro, since it might be macro argument.
	(atomic_decrement_if_positive): Initialize __memp, remove setting
	of non-existent variable.
	(atomic_bit_test_set): Cast 1 to __typeof (*mem) before shifting.
	* sysdeps/ia64/bits/atomic.h (atomic_exchange_and_add): Implement
	using atomic_compare_and_exchange_val_acq.
	(atomic_decrement_if_positive, atomic_bit_test_set): Define.
	* sysdeps/s390/bits/atomic.h (__arch_compare_and_exchange_val_8_acq):
	Renamed from...
	(__arch_compare_and_exchange_bool_8_acq): ... this.
	(__arch_compare_and_exchange_val_16_acq): Renamed from...
	(__arch_compare_and_exchange_bool_16_acq): ... this.
	(__arch_compare_and_exchange_val_32_acq): Return old value.  Renamed
	from...
	(__arch_compare_and_exchange_bool_32_acq): ... this.
	(__arch_compare_and_exchange_val_64_acq): Return old value.  Renamed
	from...
	(__arch_compare_and_exchange_bool_64_acq): ... this.
	(__arch_compare_and_exchange_val_32_acq): Use __typeof for local
	variables types instead of assuming int.
	Change prefix of local variables to __arch.
	* sysdeps/generic/bits/atomic.h (arch_compare_and_exchange_acq):
	Remove.
	(atomic_compare_and_exchange_val_acq,
	atomic_compare_and_exchange_bool_acq): Define.

	* csu/tst-atomic.c: New test.
	* csu/tst-atomic-long.c: New test.
	* csu/Makefile (tests): Add tst-atomic and tst-atomic-long.

	* malloc/memusagestat.c (main): Kill warning if uint64_t is ulong.

	* sysdeps/s390/Versions: Add trailing newline.

	* sysdeps/unix/sysv/linux/sysconf.c (__sysconf): Kill warning
	if INTERNAL_SYSCALL_ERROR_P doesn't use its first argument.

1 files changed, 45 insertions, 26 deletions

diff --git a/sysdeps/ia64/bits/atomic.h b/sysdeps/ia64/bits/atomic.h
index 27789c0a2e..68d79fa9ec 100644
--- a/sysdeps/ia64/bits/atomic.h
+++ b/sysdeps/ia64/bits/atomic.h
@@ -78,30 +78,49 @@ typedef uintmax_t uatomic_max_t;
   __sync_lock_test_and_set_si (mem, value)
 
 #define atomic_exchange_and_add(mem, value) \
-  ({									      \
-    __typeof (*mem) __oldval, __val;					      \
-    __typeof (mem) __memp = (mem);					      \
-    __typeof (*mem) __value = (value);					      \
+  ({ __typeof (*mem) __oldval, __val;					      \
+     __typeof (mem) __memp = (mem);					      \
+     __typeof (*mem) __value = (value);					      \
 									      \
-    __val = *__memp;							      \
-    if (sizeof (*mem) == 4)						      \
-      do								      \
-	{								      \
-	  __oldval = __val;						      \
-	  __val = __arch_compare_and_exchange_32_val_acq (__memp,	      \
-							  __oldval + __value, \
-							  __oldval);	      \
-	}								      \
-      while (__builtin_expect (__val != __oldval, 0));			      \
-    else if (sizeof (*mem) == 8)					      \
-      do								      \
-	{								      \
-	  __oldval = __val;						      \
-	  __val = __arch_compare_and_exchange_64_val_acq (__memp,	      \
-							  __oldval + __value, \
-							  __oldval);	      \
-	}								      \
-      while (__builtin_expect (__val != __oldval, 0));			      \
-    else								      \
-      abort ();								      \
-    __oldval + __value; })
+     __val = (*__memp);							      \
+     do									      \
+       {								      \
+	 __oldval = __val;						      \
+	 __val = atomic_compare_and_exchange_val_acq (__memp,		      \
+						      __oldval + __value,     \
+						      __oldval);	      \
+       }								      \
+     while (__builtin_expect (__val != __oldval, 0));			      \
+     __oldval; })
+
+#define atomic_decrement_if_positive(mem) \
+  ({ __typeof (*mem) __oldval, __val;					      \
+     __typeof (mem) __memp = (mem);					      \
+									      \
+     __val = (*__memp);							      \
+     do									      \
+       {								      \
+	 __oldval = __val;						      \
+	 if (__builtin_expect (__val <= 0, 0))				      \
+	   break;							      \
+	 __val = atomic_compare_and_exchange_val_acq (__memp,	__oldval - 1, \
+						      __oldval);	      \
+       }								      \
+     while (__builtin_expect (__val != __oldval, 0));			      \
+     __oldval; })
+
+#define atomic_bit_test_set(mem, bit) \
+  ({ __typeof (*mem) __oldval, __val;					      \
+     __typeof (mem) __memp = (mem);					      \
+     __typeof (*mem) __mask = ((__typeof (*mem)) 1 << (bit));		      \
+									      \
+     __val = (*__memp);							      \
+     do									      \
+       {								      \
+	 __oldval = __val;						      \
+	 __val = atomic_compare_and_exchange_val_acq (__memp,		      \
+						      __oldval | __mask,      \
+						      __oldval);	      \
+       }								      \
+     while (__builtin_expect (__val != __oldval, 0));			      \
+     __oldval & __mask; })