fschneider@chromium.org | 7979bbb | 2011-03-28 10:47:03 +0000 | [diff] [blame] | 1 | // Copyright 2011 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 | #ifndef V8_PLATFORM_TLS_WIN32_H_ |
| 29 | #define V8_PLATFORM_TLS_WIN32_H_ |
| 30 | |
| 31 | #include "checks.h" |
| 32 | #include "globals.h" |
| 33 | #include "win32-headers.h" |
| 34 | |
| 35 | namespace v8 { |
| 36 | namespace internal { |
| 37 | |
| 38 | #if defined(_WIN32) && !defined(_WIN64) |
| 39 | |
| 40 | #define V8_FAST_TLS_SUPPORTED 1 |
| 41 | |
| 42 | inline intptr_t InternalGetExistingThreadLocal(intptr_t index) { |
| 43 | const intptr_t kTibInlineTlsOffset = 0xE10; |
| 44 | const intptr_t kTibExtraTlsOffset = 0xF94; |
| 45 | const intptr_t kMaxInlineSlots = 64; |
| 46 | const intptr_t kMaxSlots = kMaxInlineSlots + 1024; |
| 47 | ASSERT(0 <= index && index < kMaxSlots); |
| 48 | if (index < kMaxInlineSlots) { |
| 49 | return static_cast<intptr_t>(__readfsdword(kTibInlineTlsOffset + |
| 50 | kPointerSize * index)); |
| 51 | } |
| 52 | intptr_t extra = static_cast<intptr_t>(__readfsdword(kTibExtraTlsOffset)); |
| 53 | ASSERT(extra != 0); |
| 54 | return *reinterpret_cast<intptr_t*>(extra + |
| 55 | kPointerSize * (index - kMaxInlineSlots)); |
| 56 | } |
| 57 | |
| 58 | #endif |
| 59 | |
| 60 | } } // namespace v8::internal |
| 61 | |
| 62 | #endif // V8_PLATFORM_TLS_WIN32_H_ |