src/hotspot/os_cpu/solaris_x86/orderAccess_solaris_x86.inline.hpp

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * published by the Free Software Foundation.
 *
 * 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_ORDERACCESS_SOLARIS_X86_INLINE_HPP
#define OS_CPU_SOLARIS_X86_VM_ORDERACCESS_SOLARIS_X86_INLINE_HPP

#include "runtime/atomic.hpp"
#include "runtime/orderAccess.hpp"
#include "runtime/os.hpp"

// Compiler version last used for testing: solaris studio 12u3
// Please update this information when this file changes

// Implementation of class OrderAccess.

// A compiler barrier, forcing the C++ compiler to invalidate all memory assumptions
inline void compiler_barrier() {
  __asm__ volatile ("" : : : "memory");
}

inline void OrderAccess::loadload()   { compiler_barrier(); }
inline void OrderAccess::storestore() { compiler_barrier(); }
inline void OrderAccess::loadstore()  { compiler_barrier(); }
inline void OrderAccess::storeload()  { fence();            }

inline void OrderAccess::acquire()    { compiler_barrier(); }
inline void OrderAccess::release()    { compiler_barrier(); }

inline void OrderAccess::fence() {
  if (os::is_MP()) {
#ifdef AMD64
    __asm__ volatile ("lock; addl $0,0(%%rsp)" : : : "cc", "memory");
#else
    __asm__ volatile ("lock; addl $0,0(%%esp)" : : : "cc", "memory");
#endif
  }
  compiler_barrier();
}

#define VM_HAS_GENERALIZED_ORDER_ACCESS 1

#endif // OS_CPU_SOLARIS_X86_VM_ORDERACCESS_SOLARIS_X86_INLINE_HPP