kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame^] | 1 | // Copyright 2010 the V8 project authors. All rights reserved. |
| 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | // This file is an internal atomic implementation, use atomicops.h instead. |
| 29 | |
| 30 | #ifndef V8_ATOMICOPS_INTERNALS_X86_MSVC_H_ |
| 31 | #define V8_ATOMICOPS_INTERNALS_X86_MSVC_H_ |
| 32 | |
| 33 | #include "checks.h" |
| 34 | #include "win32-headers.h" |
| 35 | |
| 36 | namespace v8 { |
| 37 | namespace internal { |
| 38 | |
| 39 | inline Atomic32 NoBarrier_CompareAndSwap(volatile Atomic32* ptr, |
| 40 | Atomic32 old_value, |
| 41 | Atomic32 new_value) { |
| 42 | LONG result = InterlockedCompareExchange( |
| 43 | reinterpret_cast<volatile LONG*>(ptr), |
| 44 | static_cast<LONG>(new_value), |
| 45 | static_cast<LONG>(old_value)); |
| 46 | return static_cast<Atomic32>(result); |
| 47 | } |
| 48 | |
| 49 | inline Atomic32 NoBarrier_AtomicExchange(volatile Atomic32* ptr, |
| 50 | Atomic32 new_value) { |
| 51 | LONG result = InterlockedExchange( |
| 52 | reinterpret_cast<volatile LONG*>(ptr), |
| 53 | static_cast<LONG>(new_value)); |
| 54 | return static_cast<Atomic32>(result); |
| 55 | } |
| 56 | |
| 57 | inline Atomic32 Barrier_AtomicIncrement(volatile Atomic32* ptr, |
| 58 | Atomic32 increment) { |
| 59 | return InterlockedExchangeAdd( |
| 60 | reinterpret_cast<volatile LONG*>(ptr), |
| 61 | static_cast<LONG>(increment)) + increment; |
| 62 | } |
| 63 | |
| 64 | inline Atomic32 NoBarrier_AtomicIncrement(volatile Atomic32* ptr, |
| 65 | Atomic32 increment) { |
| 66 | return Barrier_AtomicIncrement(ptr, increment); |
| 67 | } |
| 68 | |
| 69 | #if !(defined(_MSC_VER) && _MSC_VER >= 1400) |
| 70 | #error "We require at least vs2005 for MemoryBarrier" |
| 71 | #endif |
| 72 | inline void MemoryBarrier() { |
| 73 | // We use MemoryBarrier from WinNT.h |
| 74 | ::MemoryBarrier(); |
| 75 | } |
| 76 | |
| 77 | inline Atomic32 Acquire_CompareAndSwap(volatile Atomic32* ptr, |
| 78 | Atomic32 old_value, |
| 79 | Atomic32 new_value) { |
| 80 | return NoBarrier_CompareAndSwap(ptr, old_value, new_value); |
| 81 | } |
| 82 | |
| 83 | inline Atomic32 Release_CompareAndSwap(volatile Atomic32* ptr, |
| 84 | Atomic32 old_value, |
| 85 | Atomic32 new_value) { |
| 86 | return NoBarrier_CompareAndSwap(ptr, old_value, new_value); |
| 87 | } |
| 88 | |
| 89 | inline void NoBarrier_Store(volatile Atomic32* ptr, Atomic32 value) { |
| 90 | *ptr = value; |
| 91 | } |
| 92 | |
| 93 | inline void Acquire_Store(volatile Atomic32* ptr, Atomic32 value) { |
| 94 | NoBarrier_AtomicExchange(ptr, value); |
| 95 | // acts as a barrier in this implementation |
| 96 | } |
| 97 | |
| 98 | inline void Release_Store(volatile Atomic32* ptr, Atomic32 value) { |
| 99 | *ptr = value; // works w/o barrier for current Intel chips as of June 2005 |
| 100 | // See comments in Atomic64 version of Release_Store() below. |
| 101 | } |
| 102 | |
| 103 | inline Atomic32 NoBarrier_Load(volatile const Atomic32* ptr) { |
| 104 | return *ptr; |
| 105 | } |
| 106 | |
| 107 | inline Atomic32 Acquire_Load(volatile const Atomic32* ptr) { |
| 108 | Atomic32 value = *ptr; |
| 109 | return value; |
| 110 | } |
| 111 | |
| 112 | inline Atomic32 Release_Load(volatile const Atomic32* ptr) { |
| 113 | MemoryBarrier(); |
| 114 | return *ptr; |
| 115 | } |
| 116 | |
| 117 | #if defined(_WIN64) |
| 118 | |
| 119 | // 64-bit low-level operations on 64-bit platform. |
| 120 | |
| 121 | STATIC_ASSERT(sizeof(Atomic64) == sizeof(PVOID)); |
| 122 | |
| 123 | inline Atomic64 NoBarrier_CompareAndSwap(volatile Atomic64* ptr, |
| 124 | Atomic64 old_value, |
| 125 | Atomic64 new_value) { |
| 126 | PVOID result = InterlockedCompareExchangePointer( |
| 127 | reinterpret_cast<volatile PVOID*>(ptr), |
| 128 | reinterpret_cast<PVOID>(new_value), reinterpret_cast<PVOID>(old_value)); |
| 129 | return reinterpret_cast<Atomic64>(result); |
| 130 | } |
| 131 | |
| 132 | inline Atomic64 NoBarrier_AtomicExchange(volatile Atomic64* ptr, |
| 133 | Atomic64 new_value) { |
| 134 | PVOID result = InterlockedExchangePointer( |
| 135 | reinterpret_cast<volatile PVOID*>(ptr), |
| 136 | reinterpret_cast<PVOID>(new_value)); |
| 137 | return reinterpret_cast<Atomic64>(result); |
| 138 | } |
| 139 | |
| 140 | inline Atomic64 Barrier_AtomicIncrement(volatile Atomic64* ptr, |
| 141 | Atomic64 increment) { |
| 142 | return InterlockedExchangeAdd64( |
| 143 | reinterpret_cast<volatile LONGLONG*>(ptr), |
| 144 | static_cast<LONGLONG>(increment)) + increment; |
| 145 | } |
| 146 | |
| 147 | inline Atomic64 NoBarrier_AtomicIncrement(volatile Atomic64* ptr, |
| 148 | Atomic64 increment) { |
| 149 | return Barrier_AtomicIncrement(ptr, increment); |
| 150 | } |
| 151 | |
| 152 | inline void NoBarrier_Store(volatile Atomic64* ptr, Atomic64 value) { |
| 153 | *ptr = value; |
| 154 | } |
| 155 | |
| 156 | inline void Acquire_Store(volatile Atomic64* ptr, Atomic64 value) { |
| 157 | NoBarrier_AtomicExchange(ptr, value); |
| 158 | // acts as a barrier in this implementation |
| 159 | } |
| 160 | |
| 161 | inline void Release_Store(volatile Atomic64* ptr, Atomic64 value) { |
| 162 | *ptr = value; // works w/o barrier for current Intel chips as of June 2005 |
| 163 | |
| 164 | // When new chips come out, check: |
| 165 | // IA-32 Intel Architecture Software Developer's Manual, Volume 3: |
| 166 | // System Programming Guide, Chatper 7: Multiple-processor management, |
| 167 | // Section 7.2, Memory Ordering. |
| 168 | // Last seen at: |
| 169 | // http://developer.intel.com/design/pentium4/manuals/index_new.htm |
| 170 | } |
| 171 | |
| 172 | inline Atomic64 NoBarrier_Load(volatile const Atomic64* ptr) { |
| 173 | return *ptr; |
| 174 | } |
| 175 | |
| 176 | inline Atomic64 Acquire_Load(volatile const Atomic64* ptr) { |
| 177 | Atomic64 value = *ptr; |
| 178 | return value; |
| 179 | } |
| 180 | |
| 181 | inline Atomic64 Release_Load(volatile const Atomic64* ptr) { |
| 182 | MemoryBarrier(); |
| 183 | return *ptr; |
| 184 | } |
| 185 | |
| 186 | inline Atomic64 Acquire_CompareAndSwap(volatile Atomic64* ptr, |
| 187 | Atomic64 old_value, |
| 188 | Atomic64 new_value) { |
| 189 | return NoBarrier_CompareAndSwap(ptr, old_value, new_value); |
| 190 | } |
| 191 | |
| 192 | inline Atomic64 Release_CompareAndSwap(volatile Atomic64* ptr, |
| 193 | Atomic64 old_value, |
| 194 | Atomic64 new_value) { |
| 195 | return NoBarrier_CompareAndSwap(ptr, old_value, new_value); |
| 196 | } |
| 197 | |
| 198 | |
| 199 | #endif // defined(_WIN64) |
| 200 | |
| 201 | } } // namespace v8::internal |
| 202 | |
| 203 | #endif // V8_ATOMICOPS_INTERNALS_X86_MSVC_H_ |