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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
 * This code 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 General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
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#ifndef OS_CPU_SOLARIS_X86_VM_ATOMIC_SOLARIS_X86_HPP
#define OS_CPU_SOLARIS_X86_VM_ATOMIC_SOLARIS_X86_HPP

// For Sun Studio - implementation is in solaris_x86_64.il.

extern "C" {
  int32_t _Atomic_add(int32_t add_value, volatile int32_t* dest);
  int64_t _Atomic_add_long(int64_t add_value, volatile int64_t* dest);

  int32_t _Atomic_xchg(int32_t exchange_value, volatile int32_t* dest);
  int8_t  _Atomic_cmpxchg_byte(int8_t exchange_value, volatile int8_t* dest,
                               int8_t compare_value);
  int32_t _Atomic_cmpxchg(int32_t exchange_value, volatile int32_t* dest,
                          int32_t compare_value);
  int64_t _Atomic_cmpxchg_long(int64_t exchange_value, volatile int64_t* dest,
                               int64_t compare_value);
}

template<size_t byte_size>
struct Atomic::PlatformAdd
  : Atomic::AddAndFetch<Atomic::PlatformAdd<byte_size> >
{
  template<typename I, typename D>
  D add_and_fetch(I add_value, D volatile* dest, atomic_memory_order order) const;
};

// Not using add_using_helper; see comment for cmpxchg.
template<>
template<typename I, typename D>
inline D Atomic::PlatformAdd<4>::add_and_fetch(I add_value, D volatile* dest,
                                               atomic_memory_order order) const {
  STATIC_ASSERT(4 == sizeof(I));
  STATIC_ASSERT(4 == sizeof(D));
  return PrimitiveConversions::cast<D>(
    _Atomic_add(PrimitiveConversions::cast<int32_t>(add_value),
                reinterpret_cast<int32_t volatile*>(dest)));
}

// Not using add_using_helper; see comment for cmpxchg.
template<>
template<typename I, typename D>
inline D Atomic::PlatformAdd<8>::add_and_fetch(I add_value, D volatile* dest,
                                               atomic_memory_order order) const {
  STATIC_ASSERT(8 == sizeof(I));
  STATIC_ASSERT(8 == sizeof(D));
  return PrimitiveConversions::cast<D>(
    _Atomic_add_long(PrimitiveConversions::cast<int64_t>(add_value),
                     reinterpret_cast<int64_t volatile*>(dest)));
}

template<>
template<typename T>
inline T Atomic::PlatformXchg<4>::operator()(T exchange_value,
                                             T volatile* dest,
                                             atomic_memory_order order) const {
  STATIC_ASSERT(4 == sizeof(T));
  return PrimitiveConversions::cast<T>(
    _Atomic_xchg(PrimitiveConversions::cast<int32_t>(exchange_value),
                 reinterpret_cast<int32_t volatile*>(dest)));
}

extern "C" int64_t _Atomic_xchg_long(int64_t exchange_value, volatile int64_t* dest);

template<>
template<typename T>
inline T Atomic::PlatformXchg<8>::operator()(T exchange_value,
                                             T volatile* dest,
                                             atomic_memory_order order) const {
  STATIC_ASSERT(8 == sizeof(T));
  return PrimitiveConversions::cast<T>(
    _Atomic_xchg_long(PrimitiveConversions::cast<int64_t>(exchange_value),
                      reinterpret_cast<int64_t volatile*>(dest)));
}

// Not using cmpxchg_using_helper here, because some configurations of
// Solaris compiler don't deal well with passing a "defined in .il"
// function as an argument.  We *should* switch to using gcc-style
// inline assembly, but attempting to do so with Studio 12.4 ran into
// segfaults.

template<>
template<typename T>
inline T Atomic::PlatformCmpxchg<1>::operator()(T exchange_value,
                                                T volatile* dest,
                                                T compare_value,
                                                atomic_memory_order order) const {
  STATIC_ASSERT(1 == sizeof(T));
  return PrimitiveConversions::cast<T>(
    _Atomic_cmpxchg_byte(PrimitiveConversions::cast<int8_t>(exchange_value),
                         reinterpret_cast<int8_t volatile*>(dest),
                         PrimitiveConversions::cast<int8_t>(compare_value)));
}

template<>
template<typename T>
inline T Atomic::PlatformCmpxchg<4>::operator()(T exchange_value,
                                                T volatile* dest,
                                                T compare_value,
                                                atomic_memory_order order) const {
  STATIC_ASSERT(4 == sizeof(T));
  return PrimitiveConversions::cast<T>(
    _Atomic_cmpxchg(PrimitiveConversions::cast<int32_t>(exchange_value),
                    reinterpret_cast<int32_t volatile*>(dest),
                    PrimitiveConversions::cast<int32_t>(compare_value)));
}

template<>
template<typename T>
inline T Atomic::PlatformCmpxchg<8>::operator()(T exchange_value,
                                                T volatile* dest,
                                                T compare_value,
                                                atomic_memory_order order) const {
  STATIC_ASSERT(8 == sizeof(T));
  return PrimitiveConversions::cast<T>(
    _Atomic_cmpxchg_long(PrimitiveConversions::cast<int64_t>(exchange_value),
                         reinterpret_cast<int64_t volatile*>(dest),
                         PrimitiveConversions::cast<int64_t>(compare_value)));
}

#endif // OS_CPU_SOLARIS_X86_VM_ATOMIC_SOLARIS_X86_HPP