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src/os_cpu/linux_zero/vm/orderAccess_linux_zero.inline.hpp@f90c822e73f8

src/os_cpu/linux_zero/vm/orderAccess_linux_zero.inline.hpp

Wed, 27 Apr 2016 01:25:04 +0800

author
aoqi
date
Wed, 27 Apr 2016 01:25:04 +0800
changeset 0
f90c822e73f8
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http://hg.openjdk.java.net/jdk8u/jdk8u/hotspot/
changeset: 6782:28b50d07f6f8
tag: jdk8u25-b17

     1 /*

     2  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.

     3  * Copyright 2007, 2008, 2009 Red Hat, Inc.

     4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     5  *

     6  * This code is free software; you can redistribute it and/or modify it

     7  * under the terms of the GNU General Public License version 2 only, as

     8  * published by the Free Software Foundation.

     9  *

    10  * This code is distributed in the hope that it will be useful, but WITHOUT

    11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    13  * version 2 for more details (a copy is included in the LICENSE file that

    14  * accompanied this code).

    15  *

    16  * You should have received a copy of the GNU General Public License version

    17  * 2 along with this work; if not, write to the Free Software Foundation,

    18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    19  *

    20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    21  * or visit www.oracle.com if you need additional information or have any

    22  * questions.

    23  *

    24  */

    25 

    26 #ifndef OS_CPU_LINUX_ZERO_VM_ORDERACCESS_LINUX_ZERO_INLINE_HPP

    27 #define OS_CPU_LINUX_ZERO_VM_ORDERACCESS_LINUX_ZERO_INLINE_HPP

    28 

    29 #include "runtime/orderAccess.hpp"

    30 #include "vm_version_zero.hpp"

    31 

    32 #ifdef ARM

    33 

    34 /*

    35  * ARM Kernel helper for memory barrier.

    36  * Using __asm __volatile ("":::"memory") does not work reliable on ARM

    37  * and gcc __sync_synchronize(); implementation does not use the kernel

    38  * helper for all gcc versions so it is unreliable to use as well.

    39  */

    40 typedef void (__kernel_dmb_t) (void);

    41 #define __kernel_dmb (*(__kernel_dmb_t *) 0xffff0fa0)

    42 

    43 #define FULL_MEM_BARRIER __kernel_dmb()

    44 #define READ_MEM_BARRIER __kernel_dmb()

    45 #define WRITE_MEM_BARRIER __kernel_dmb()

    46 

    47 #else // ARM

    48 

    49 #define FULL_MEM_BARRIER __sync_synchronize()

    50 

    51 #ifdef PPC

    52 

    53 #define READ_MEM_BARRIER __asm __volatile ("isync":::"memory")

    54 #ifdef __NO_LWSYNC__

    55 #define WRITE_MEM_BARRIER __asm __volatile ("sync":::"memory")

    56 #else

    57 #define WRITE_MEM_BARRIER __asm __volatile ("lwsync":::"memory")

    58 #endif

    59 

    60 #else // PPC

    61 

    62 #define READ_MEM_BARRIER __asm __volatile ("":::"memory")

    63 #define WRITE_MEM_BARRIER __asm __volatile ("":::"memory")

    64 

    65 #endif // PPC

    66 

    67 #endif // ARM

    68 

    69 

    70 inline void OrderAccess::loadload()   { acquire(); }

    71 inline void OrderAccess::storestore() { release(); }

    72 inline void OrderAccess::loadstore()  { acquire(); }

    73 inline void OrderAccess::storeload()  { fence(); }

    74 

    75 inline void OrderAccess::acquire() {

    76   READ_MEM_BARRIER;

    77 }

    78 

    79 inline void OrderAccess::release() {

    80   WRITE_MEM_BARRIER;

    81 }

    82 

    83 inline void OrderAccess::fence() {

    84   FULL_MEM_BARRIER;

    85 }

    86 

    87 inline jbyte    OrderAccess::load_acquire(volatile jbyte*   p) { jbyte data = *p; acquire(); return data; }

    88 inline jshort   OrderAccess::load_acquire(volatile jshort*  p) { jshort data = *p; acquire(); return data; }

    89 inline jint     OrderAccess::load_acquire(volatile jint*    p) { jint data = *p; acquire(); return data; }

    90 inline jlong    OrderAccess::load_acquire(volatile jlong*   p) {

    91   jlong tmp;

    92   os::atomic_copy64(p, &tmp);

    93   acquire();

    94   return tmp;

    95 }

    96 inline jubyte    OrderAccess::load_acquire(volatile jubyte*   p) { jubyte data = *p; acquire(); return data; }

    97 inline jushort   OrderAccess::load_acquire(volatile jushort*  p) { jushort data = *p; acquire(); return data; }

    98 inline juint     OrderAccess::load_acquire(volatile juint*    p) { juint data = *p; acquire(); return data; }

    99 inline julong   OrderAccess::load_acquire(volatile julong*  p) {

   100   julong tmp;

   101   os::atomic_copy64(p, &tmp);

   102   acquire();

   103   return tmp;

   104 }

   105 inline jfloat   OrderAccess::load_acquire(volatile jfloat*  p) { jfloat data = *p; acquire(); return data; }

   106 inline jdouble  OrderAccess::load_acquire(volatile jdouble* p) {

   107   jdouble tmp;

   108   os::atomic_copy64(p, &tmp);

   109   acquire();

   110   return tmp;

   111 }

   112 

   113 inline intptr_t OrderAccess::load_ptr_acquire(volatile intptr_t*   p) {

   114   intptr_t data = *p;

   115   acquire();

   116   return data;

   117 }

   118 inline void*    OrderAccess::load_ptr_acquire(volatile void*       p) {

   119   void *data = *(void* volatile *)p;

   120   acquire();

   121   return data;

   122 }

   123 inline void*    OrderAccess::load_ptr_acquire(const volatile void* p) {

   124   void *data = *(void* const volatile *)p;

   125   acquire();

   126   return data;

   127 }

   128 

   129 inline void     OrderAccess::release_store(volatile jbyte*   p, jbyte   v) { release(); *p = v; }

   130 inline void     OrderAccess::release_store(volatile jshort*  p, jshort  v) { release(); *p = v; }

   131 inline void     OrderAccess::release_store(volatile jint*    p, jint    v) { release(); *p = v; }

   132 inline void     OrderAccess::release_store(volatile jlong*   p, jlong   v)

   133 { release(); os::atomic_copy64(&v, p); }

   134 inline void     OrderAccess::release_store(volatile jubyte*  p, jubyte  v) { release(); *p = v; }

   135 inline void     OrderAccess::release_store(volatile jushort* p, jushort v) { release(); *p = v; }

   136 inline void     OrderAccess::release_store(volatile juint*   p, juint   v) { release(); *p = v; }

   137 inline void     OrderAccess::release_store(volatile julong*  p, julong  v)

   138 { release(); os::atomic_copy64(&v, p); }

   139 inline void     OrderAccess::release_store(volatile jfloat*  p, jfloat  v) { release(); *p = v; }

   140 inline void     OrderAccess::release_store(volatile jdouble* p, jdouble v)

   141 { release(); os::atomic_copy64(&v, p); }

   142 

   143 inline void     OrderAccess::release_store_ptr(volatile intptr_t* p, intptr_t v) { release(); *p = v; }

   144 inline void     OrderAccess::release_store_ptr(volatile void*     p, void*    v)

   145 { release(); *(void* volatile *)p = v; }

   146 

   147 inline void     OrderAccess::store_fence(jbyte*   p, jbyte   v) { *p = v; fence(); }

   148 inline void     OrderAccess::store_fence(jshort*  p, jshort  v) { *p = v; fence(); }

   149 inline void     OrderAccess::store_fence(jint*    p, jint    v) { *p = v; fence(); }

   150 inline void     OrderAccess::store_fence(jlong*   p, jlong   v) { os::atomic_copy64(&v, p); fence(); }

   151 inline void     OrderAccess::store_fence(jubyte*  p, jubyte  v) { *p = v; fence(); }

   152 inline void     OrderAccess::store_fence(jushort* p, jushort v) { *p = v; fence(); }

   153 inline void     OrderAccess::store_fence(juint*   p, juint   v) { *p = v; fence(); }

   154 inline void     OrderAccess::store_fence(julong*  p, julong  v) { os::atomic_copy64(&v, p); fence(); }

   155 inline void     OrderAccess::store_fence(jfloat*  p, jfloat  v) { *p = v; fence(); }

   156 inline void     OrderAccess::store_fence(jdouble* p, jdouble v) { os::atomic_copy64(&v, p); fence(); }

   157 

   158 inline void     OrderAccess::store_ptr_fence(intptr_t* p, intptr_t v) { *p = v; fence(); }

   159 inline void     OrderAccess::store_ptr_fence(void**    p, void*    v) { *p = v; fence(); }

   160 

   161 inline void     OrderAccess::release_store_fence(volatile jbyte*   p, jbyte   v) { release_store(p, v); fence(); }

   162 inline void     OrderAccess::release_store_fence(volatile jshort*  p, jshort  v) { release_store(p, v); fence(); }

   163 inline void     OrderAccess::release_store_fence(volatile jint*    p, jint    v) { release_store(p, v); fence(); }

   164 inline void     OrderAccess::release_store_fence(volatile jlong*   p, jlong   v) { release_store(p, v); fence(); }

   165 inline void     OrderAccess::release_store_fence(volatile jubyte*  p, jubyte  v) { release_store(p, v); fence(); }

   166 inline void     OrderAccess::release_store_fence(volatile jushort* p, jushort v) { release_store(p, v); fence(); }

   167 inline void     OrderAccess::release_store_fence(volatile juint*   p, juint   v) { release_store(p, v); fence(); }

   168 inline void     OrderAccess::release_store_fence(volatile julong*  p, julong  v) { release_store(p, v); fence(); }

   169 inline void     OrderAccess::release_store_fence(volatile jfloat*  p, jfloat  v) { release_store(p, v); fence(); }

   170 inline void     OrderAccess::release_store_fence(volatile jdouble* p, jdouble v) { release_store(p, v); fence(); }

   171 

   172 inline void     OrderAccess::release_store_ptr_fence(volatile intptr_t* p, intptr_t v) { release_store_ptr(p, v); fence(); }

   173 inline void     OrderAccess::release_store_ptr_fence(volatile void*     p, void*    v) { release_store_ptr(p, v); fence(); }

   174 

   175 #endif // OS_CPU_LINUX_ZERO_VM_ORDERACCESS_LINUX_ZERO_INLINE_HPP

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