double_atomic_load_store.h

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/*
 * Copyright (c) 2004 Hewlett-Packard Development Company, L.P.
 * Copyright (c) 2013 Ivan Maidanski
 *
 * 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.
 */
 
/* Definitions for architectures on which AO_double_t loads and stores  */
/* are atomic (either for suitably aligned data only or for any legal   */
/* alignment).                                                          */
 
AO_INLINE AO_double_t
AO_double_load(const volatile AO_double_t *addr)
{
  AO_double_t result;
 
# ifdef AO_ACCESS_double_CHECK_ALIGNED
    AO_ASSERT_ADDR_ALIGNED(addr);
# endif
  /* Cast away the volatile in case it adds fence semantics.  */
  result.AO_whole = ((const AO_double_t *)addr)->AO_whole;
  return result;
}
#define AO_HAVE_double_load
 
AO_INLINE void
AO_double_store(volatile AO_double_t *addr, AO_double_t new_val)
{
# ifdef AO_ACCESS_double_CHECK_ALIGNED
    AO_ASSERT_ADDR_ALIGNED(addr);
# endif
  ((AO_double_t *)addr)->AO_whole = new_val.AO_whole;
}
#define AO_HAVE_double_store