X-Git-Url: http://wien.tomnetworks.com/gitweb/?p=hs-boehmgc.git;a=blobdiff_plain;f=gc-7.2%2Flibatomic_ops%2Fsrc%2Fatomic_ops%2Fsysdeps%2Fint_acquire_release_volatile.h;fp=gc-7.2%2Flibatomic_ops%2Fsrc%2Fatomic_ops%2Fsysdeps%2Fint_acquire_release_volatile.h;h=01037a20563ccba0e50e68f5b0b8b0394214f292;hp=0000000000000000000000000000000000000000;hb=324587ba93dc77f37406d41fd2a20d0e0d94fb1d;hpb=2a4ea609491b225a1ceb06da70396e93916f137a

diff --git a/gc-7.2/libatomic_ops/src/atomic_ops/sysdeps/int_acquire_release_volatile.h b/gc-7.2/libatomic_ops/src/atomic_ops/sysdeps/int_acquire_release_volatile.h
new file mode 100644
index 0000000..01037a2
--- /dev/null
+++ b/gc-7.2/libatomic_ops/src/atomic_ops/sysdeps/int_acquire_release_volatile.h
@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 2003-2004 Hewlett-Packard Development Company, L.P.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+/*
+ * This file adds definitions appropriate for environments in which an unsigned
+ * int volatile load has acquire semantics, and an unsigned short volatile
+ * store has release semantics.  This is true with the standard Itanium ABI.
+ */
+#if !defined(AO_GCC_BARRIER)
+#  if defined(__GNUC__)
+#    define AO_GCC_BARRIER() AO_compiler_barrier()
+#  else
+#    define AO_GCC_BARRIER()
+#  endif
+#endif
+
+AO_INLINE unsigned int
+AO_int_load_acquire(const volatile unsigned int *p)
+{
+  unsigned int result = *p;
+  /* A normal volatile load generates an ld.acq         */
+  AO_GCC_BARRIER();
+  return result;
+}
+#define AO_HAVE_int_load_acquire
+
+AO_INLINE void
+AO_int_store_release(volatile unsigned int *p, unsigned int val)
+{
+  AO_GCC_BARRIER();
+  /* A normal volatile store generates an st.rel        */
+  *p = val;
+}
+#define AO_HAVE_int_store_release