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 35namespace v8 { 36namespace internal { 37 38#if defined(_WIN32) && !defined(_WIN64) 39 40#define V8_FAST_TLS_SUPPORTED 1 41 42inline 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_ 63