39faabf198
git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@7376 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
63 lines
2.6 KiB
C++
63 lines
2.6 KiB
C++
// Copyright 2011 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#ifndef V8_PLATFORM_TLS_WIN32_H_
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#define V8_PLATFORM_TLS_WIN32_H_
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#include "checks.h"
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#include "globals.h"
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#include "win32-headers.h"
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namespace v8 {
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namespace internal {
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#if defined(_WIN32) && !defined(_WIN64)
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#define V8_FAST_TLS_SUPPORTED 1
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inline intptr_t InternalGetExistingThreadLocal(intptr_t index) {
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const intptr_t kTibInlineTlsOffset = 0xE10;
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const intptr_t kTibExtraTlsOffset = 0xF94;
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const intptr_t kMaxInlineSlots = 64;
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const intptr_t kMaxSlots = kMaxInlineSlots + 1024;
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ASSERT(0 <= index && index < kMaxSlots);
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if (index < kMaxInlineSlots) {
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return static_cast<intptr_t>(__readfsdword(kTibInlineTlsOffset +
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kPointerSize * index));
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}
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intptr_t extra = static_cast<intptr_t>(__readfsdword(kTibExtraTlsOffset));
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ASSERT(extra != 0);
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return *reinterpret_cast<intptr_t*>(extra +
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kPointerSize * (index - kMaxInlineSlots));
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}
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#endif
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} } // namespace v8::internal
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#endif // V8_PLATFORM_TLS_WIN32_H_
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