1 files changed, 109 insertions, 0 deletions
diff --git a/nptl/atomic.h b/nptl/atomic.h
new file mode 100644
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--- /dev/null
+++ b/nptl/atomic.h
@@ -0,0 +1,109 @@
+/* Copyright (C) 2002 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
+
+   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, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#ifndef _ATOMIC_H
+#define _ATOMIC_H	1
+
+#include <stdlib.h>
+
+#include <bits/atomic.h>
+
+
+#ifndef atomic_compare_and_exchange_acq
+# define atomic_compare_and_exchange_acq(mem, newval, oldval) \
+  ({ __typeof (__arch_compare_and_exchange_8_acq (mem, newval, oldval))	      \
+	 __result;							      \
+     if (sizeof (*mem) == 1)						      \
+       __result = __arch_compare_and_exchange_8_acq (mem, newval, oldval);    \
+     else if (sizeof (*mem) == 2)					      \
+       __result = __arch_compare_and_exchange_16_acq (mem, newval, oldval);   \
+     else if (sizeof (*mem) == 4)					      \
+       __result = __arch_compare_and_exchange_32_acq (mem, newval, oldval);   \
+     else if (sizeof (*mem) == 8)					      \
+       __result = __arch_compare_and_exchange_64_acq (mem, newval, oldval);   \
+     else								      \
+       abort ();							      \
+     __result; })
+#endif
+
+
+#ifndef atomic_compare_and_exchange_rel
+# define atomic_compare_and_exchange_rel(mem, oldval, newval) \
+  compare_and_exchange_acq (mem, oldval, newval)
+#endif
+
+
+#ifndef atomic_exchange_and_add
+# define atomic_exchange_and_add(mem, value) \
+  ({ __typeof (*mem) __oldval;						      \
+     __typeof (mem) __memp = (mem);					      \
+     __typeof (*mem) __value = (value);					      \
+									      \
+     do									      \
+       __oldval = (*__memp);						      \
+     while (compare_and_exchange_acq (__memp, __oldval + __value, __oldval)); \
+									      \
+     __value; })
+#endif
+
+
+#ifndef atomic_add
+# define atomic_add(mem, value) (void) exchange_and_add (mem, value)
+#endif
+
+
+#ifndef atomic_increment
+# define atomic_increment(mem) atomic_add (mem, 1)
+#endif
+
+
+#ifndef atomic_decrement
+# define atomic_decrement(mem) atomic_add (mem, -1)
+#endif
+
+
+#ifndef atomic_set_bit
+# define atomic_set_bit(mem, bit) \
+  (void) ({ __typeof (mem) __memp = (mem);				      \
+	    while (1)							      \
+	      {								      \
+		__typeof (*mem) __oldval = *__memp;			      \
+									      \
+		if (compare_and_exchange_acq (__memp, __oldval | 1 << bit,    \
+					      __oldval) == 0)		      \
+		  break;						      \
+	      }})
+#endif
+
+
+#ifndef atomic_full_barrier
+# define full_barrier() __asm ("" ::: "memory")
+#endif
+
+
+#ifndef atomic_read_barrier
+# define read_barrier() full_barrier()
+#endif
+
+
+#ifndef atomic_write_barrier
+# define write_barrier() full_barrier()
+#endif
+
+#endif	/* atomic.h */