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