Move platform abstraction to base library

src/platform-win32.cc

Index: src/platform-win32.cc
diff --git a/src/platform-win32.cc b/src/platform-win32.cc
deleted file mode 100644
index f89c107aad2dec2d424343689ce595f048463900..0000000000000000000000000000000000000000
--- a/src/platform-win32.cc
+++ /dev/null
@@ -1,1423 +0,0 @@
-// Copyright 2012 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Platform-specific code for Win32.
-
-// Secure API functions are not available using MinGW with msvcrt.dll
-// on Windows XP. Make sure MINGW_HAS_SECURE_API is not defined to
-// disable definition of secure API functions in standard headers that
-// would conflict with our own implementation.
-#ifdef __MINGW32__
-#include <_mingw.h>
-#ifdef MINGW_HAS_SECURE_API
-#undef MINGW_HAS_SECURE_API
-#endif  // MINGW_HAS_SECURE_API
-#endif  // __MINGW32__
-
-#include "src/base/win32-headers.h"
-
-#include "src/base/lazy-instance.h"
-#include "src/platform.h"
-#include "src/platform/time.h"
-#include "src/utils.h"
-#include "src/utils/random-number-generator.h"
-
-#ifdef _MSC_VER
-
-// Case-insensitive bounded string comparisons. Use stricmp() on Win32. Usually
-// defined in strings.h.
-int strncasecmp(const char* s1, const char* s2, int n) {
-  return _strnicmp(s1, s2, n);
-}
-
-#endif  // _MSC_VER
-
-
-// Extra functions for MinGW. Most of these are the _s functions which are in
-// the Microsoft Visual Studio C++ CRT.
-#ifdef __MINGW32__
-
-
-#ifndef __MINGW64_VERSION_MAJOR
-
-#define _TRUNCATE 0
-#define STRUNCATE 80
-
-inline void MemoryBarrier() {
-  int barrier = 0;
-  __asm__ __volatile__("xchgl %%eax,%0 ":"=r" (barrier));
-}
-
-#endif  // __MINGW64_VERSION_MAJOR
-
-
-int localtime_s(tm* out_tm, const time_t* time) {
-  tm* posix_local_time_struct = localtime(time);
-  if (posix_local_time_struct == NULL) return 1;
-  *out_tm = *posix_local_time_struct;
-  return 0;
-}
-
-
-int fopen_s(FILE** pFile, const char* filename, const char* mode) {
-  *pFile = fopen(filename, mode);
-  return *pFile != NULL ? 0 : 1;
-}
-
-int _vsnprintf_s(char* buffer, size_t sizeOfBuffer, size_t count,
-                 const char* format, va_list argptr) {
-  ASSERT(count == _TRUNCATE);
-  return _vsnprintf(buffer, sizeOfBuffer, format, argptr);
-}
-
-
-int strncpy_s(char* dest, size_t dest_size, const char* source, size_t count) {
-  CHECK(source != NULL);
-  CHECK(dest != NULL);
-  CHECK_GT(dest_size, 0);
-
-  if (count == _TRUNCATE) {
-    while (dest_size > 0 && *source != 0) {
-      *(dest++) = *(source++);
-      --dest_size;
-    }
-    if (dest_size == 0) {
-      *(dest - 1) = 0;
-      return STRUNCATE;
-    }
-  } else {
-    while (dest_size > 0 && count > 0 && *source != 0) {
-      *(dest++) = *(source++);
-      --dest_size;
-      --count;
-    }
-  }
-  CHECK_GT(dest_size, 0);
-  *dest = 0;
-  return 0;
-}
-
-#endif  // __MINGW32__
-
-namespace v8 {
-namespace internal {
-
-namespace {
-
-bool g_hard_abort = false;
-
-}  // namespace
-
-intptr_t OS::MaxVirtualMemory() {
-  return 0;
-}
-
-
-class TimezoneCache {
- public:
-  TimezoneCache() : initialized_(false) { }
-
-  void Clear() {
-    initialized_ = false;
-  }
-
-  // Initialize timezone information. The timezone information is obtained from
-  // windows. If we cannot get the timezone information we fall back to CET.
-  void InitializeIfNeeded() {
-    // Just return if timezone information has already been initialized.
-    if (initialized_) return;
-
-    // Initialize POSIX time zone data.
-    _tzset();
-    // Obtain timezone information from operating system.
-    memset(&tzinfo_, 0, sizeof(tzinfo_));
-    if (GetTimeZoneInformation(&tzinfo_) == TIME_ZONE_ID_INVALID) {
-      // If we cannot get timezone information we fall back to CET.
-      tzinfo_.Bias = -60;
-      tzinfo_.StandardDate.wMonth = 10;
-      tzinfo_.StandardDate.wDay = 5;
-      tzinfo_.StandardDate.wHour = 3;
-      tzinfo_.StandardBias = 0;
-      tzinfo_.DaylightDate.wMonth = 3;
-      tzinfo_.DaylightDate.wDay = 5;
-      tzinfo_.DaylightDate.wHour = 2;
-      tzinfo_.DaylightBias = -60;
-    }
-
-    // Make standard and DST timezone names.
-    WideCharToMultiByte(CP_UTF8, 0, tzinfo_.StandardName, -1,
-                        std_tz_name_, kTzNameSize, NULL, NULL);
-    std_tz_name_[kTzNameSize - 1] = '\0';
-    WideCharToMultiByte(CP_UTF8, 0, tzinfo_.DaylightName, -1,
-                        dst_tz_name_, kTzNameSize, NULL, NULL);
-    dst_tz_name_[kTzNameSize - 1] = '\0';
-
-    // If OS returned empty string or resource id (like "@tzres.dll,-211")
-    // simply guess the name from the UTC bias of the timezone.
-    // To properly resolve the resource identifier requires a library load,
-    // which is not possible in a sandbox.
-    if (std_tz_name_[0] == '\0' || std_tz_name_[0] == '@') {
-      OS::SNPrintF(std_tz_name_, kTzNameSize - 1,
-                   "%s Standard Time",
-                   GuessTimezoneNameFromBias(tzinfo_.Bias));
-    }
-    if (dst_tz_name_[0] == '\0' || dst_tz_name_[0] == '@') {
-      OS::SNPrintF(dst_tz_name_, kTzNameSize - 1,
-                   "%s Daylight Time",
-                   GuessTimezoneNameFromBias(tzinfo_.Bias));
-    }
-    // Timezone information initialized.
-    initialized_ = true;
-  }
-
-  // Guess the name of the timezone from the bias.
-  // The guess is very biased towards the northern hemisphere.
-  const char* GuessTimezoneNameFromBias(int bias) {
-    static const int kHour = 60;
-    switch (-bias) {
-      case -9*kHour: return "Alaska";
-      case -8*kHour: return "Pacific";
-      case -7*kHour: return "Mountain";
-      case -6*kHour: return "Central";
-      case -5*kHour: return "Eastern";
-      case -4*kHour: return "Atlantic";
-      case  0*kHour: return "GMT";
-      case +1*kHour: return "Central Europe";
-      case +2*kHour: return "Eastern Europe";
-      case +3*kHour: return "Russia";
-      case +5*kHour + 30: return "India";
-      case +8*kHour: return "China";
-      case +9*kHour: return "Japan";
-      case +12*kHour: return "New Zealand";
-      default: return "Local";
-    }
-  }
-
-
- private:
-  static const int kTzNameSize = 128;
-  bool initialized_;
-  char std_tz_name_[kTzNameSize];
-  char dst_tz_name_[kTzNameSize];
-  TIME_ZONE_INFORMATION tzinfo_;
-  friend class Win32Time;
-};
-
-
-// ----------------------------------------------------------------------------
-// The Time class represents time on win32. A timestamp is represented as
-// a 64-bit integer in 100 nanoseconds since January 1, 1601 (UTC). JavaScript
-// timestamps are represented as a doubles in milliseconds since 00:00:00 UTC,
-// January 1, 1970.
-
-class Win32Time {
- public:
-  // Constructors.
-  Win32Time();
-  explicit Win32Time(double jstime);
-  Win32Time(int year, int mon, int day, int hour, int min, int sec);
-
-  // Convert timestamp to JavaScript representation.
-  double ToJSTime();
-
-  // Set timestamp to current time.
-  void SetToCurrentTime();
-
-  // Returns the local timezone offset in milliseconds east of UTC. This is
-  // the number of milliseconds you must add to UTC to get local time, i.e.
-  // LocalOffset(CET) = 3600000 and LocalOffset(PST) = -28800000. This
-  // routine also takes into account whether daylight saving is effect
-  // at the time.
-  int64_t LocalOffset(TimezoneCache* cache);
-
-  // Returns the daylight savings time offset for the time in milliseconds.
-  int64_t DaylightSavingsOffset(TimezoneCache* cache);
-
-  // Returns a string identifying the current timezone for the
-  // timestamp taking into account daylight saving.
-  char* LocalTimezone(TimezoneCache* cache);
-
- private:
-  // Constants for time conversion.
-  static const int64_t kTimeEpoc = 116444736000000000LL;
-  static const int64_t kTimeScaler = 10000;
-  static const int64_t kMsPerMinute = 60000;
-
-  // Constants for timezone information.
-  static const bool kShortTzNames = false;
-
-  // Return whether or not daylight savings time is in effect at this time.
-  bool InDST(TimezoneCache* cache);
-
-  // Accessor for FILETIME representation.
-  FILETIME& ft() { return time_.ft_; }
-
-  // Accessor for integer representation.
-  int64_t& t() { return time_.t_; }
-
-  // Although win32 uses 64-bit integers for representing timestamps,
-  // these are packed into a FILETIME structure. The FILETIME structure
-  // is just a struct representing a 64-bit integer. The TimeStamp union
-  // allows access to both a FILETIME and an integer representation of
-  // the timestamp.
-  union TimeStamp {
-    FILETIME ft_;
-    int64_t t_;
-  };
-
-  TimeStamp time_;
-};
-
-
-// Initialize timestamp to start of epoc.
-Win32Time::Win32Time() {
-  t() = 0;
-}
-
-
-// Initialize timestamp from a JavaScript timestamp.
-Win32Time::Win32Time(double jstime) {
-  t() = static_cast<int64_t>(jstime) * kTimeScaler + kTimeEpoc;
-}
-
-
-// Initialize timestamp from date/time components.
-Win32Time::Win32Time(int year, int mon, int day, int hour, int min, int sec) {
-  SYSTEMTIME st;
-  st.wYear = year;
-  st.wMonth = mon;
-  st.wDay = day;
-  st.wHour = hour;
-  st.wMinute = min;
-  st.wSecond = sec;
-  st.wMilliseconds = 0;
-  SystemTimeToFileTime(&st, &ft());
-}
-
-
-// Convert timestamp to JavaScript timestamp.
-double Win32Time::ToJSTime() {
-  return static_cast<double>((t() - kTimeEpoc) / kTimeScaler);
-}
-
-
-// Set timestamp to current time.
-void Win32Time::SetToCurrentTime() {
-  // The default GetSystemTimeAsFileTime has a ~15.5ms resolution.
-  // Because we're fast, we like fast timers which have at least a
-  // 1ms resolution.
-  //
-  // timeGetTime() provides 1ms granularity when combined with
-  // timeBeginPeriod().  If the host application for v8 wants fast
-  // timers, it can use timeBeginPeriod to increase the resolution.
-  //
-  // Using timeGetTime() has a drawback because it is a 32bit value
-  // and hence rolls-over every ~49days.
-  //
-  // To use the clock, we use GetSystemTimeAsFileTime as our base;
-  // and then use timeGetTime to extrapolate current time from the
-  // start time.  To deal with rollovers, we resync the clock
-  // any time when more than kMaxClockElapsedTime has passed or
-  // whenever timeGetTime creates a rollover.
-
-  static bool initialized = false;
-  static TimeStamp init_time;
-  static DWORD init_ticks;
-  static const int64_t kHundredNanosecondsPerSecond = 10000000;
-  static const int64_t kMaxClockElapsedTime =
-      60*kHundredNanosecondsPerSecond;  // 1 minute
-
-  // If we are uninitialized, we need to resync the clock.
-  bool needs_resync = !initialized;
-
-  // Get the current time.
-  TimeStamp time_now;
-  GetSystemTimeAsFileTime(&time_now.ft_);
-  DWORD ticks_now = timeGetTime();
-
-  // Check if we need to resync due to clock rollover.
-  needs_resync |= ticks_now < init_ticks;
-
-  // Check if we need to resync due to elapsed time.
-  needs_resync |= (time_now.t_ - init_time.t_) > kMaxClockElapsedTime;
-
-  // Check if we need to resync due to backwards time change.
-  needs_resync |= time_now.t_ < init_time.t_;
-
-  // Resync the clock if necessary.
-  if (needs_resync) {
-    GetSystemTimeAsFileTime(&init_time.ft_);
-    init_ticks = ticks_now = timeGetTime();
-    initialized = true;
-  }
-
-  // Finally, compute the actual time.  Why is this so hard.
-  DWORD elapsed = ticks_now - init_ticks;
-  this->time_.t_ = init_time.t_ + (static_cast<int64_t>(elapsed) * 10000);
-}
-
-
-// Return the local timezone offset in milliseconds east of UTC. This
-// takes into account whether daylight saving is in effect at the time.
-// Only times in the 32-bit Unix range may be passed to this function.
-// Also, adding the time-zone offset to the input must not overflow.
-// The function EquivalentTime() in date.js guarantees this.
-int64_t Win32Time::LocalOffset(TimezoneCache* cache) {
-  cache->InitializeIfNeeded();
-
-  Win32Time rounded_to_second(*this);
-  rounded_to_second.t() = rounded_to_second.t() / 1000 / kTimeScaler *
-      1000 * kTimeScaler;
-  // Convert to local time using POSIX localtime function.
-  // Windows XP Service Pack 3 made SystemTimeToTzSpecificLocalTime()
-  // very slow.  Other browsers use localtime().
-
-  // Convert from JavaScript milliseconds past 1/1/1970 0:00:00 to
-  // POSIX seconds past 1/1/1970 0:00:00.
-  double unchecked_posix_time = rounded_to_second.ToJSTime() / 1000;
-  if (unchecked_posix_time > INT_MAX || unchecked_posix_time < 0) {
-    return 0;
-  }
-  // Because _USE_32BIT_TIME_T is defined, time_t is a 32-bit int.
-  time_t posix_time = static_cast<time_t>(unchecked_posix_time);
-
-  // Convert to local time, as struct with fields for day, hour, year, etc.
-  tm posix_local_time_struct;
-  if (localtime_s(&posix_local_time_struct, &posix_time)) return 0;
-
-  if (posix_local_time_struct.tm_isdst > 0) {
-    return (cache->tzinfo_.Bias + cache->tzinfo_.DaylightBias) * -kMsPerMinute;
-  } else if (posix_local_time_struct.tm_isdst == 0) {
-    return (cache->tzinfo_.Bias + cache->tzinfo_.StandardBias) * -kMsPerMinute;
-  } else {
-    return cache->tzinfo_.Bias * -kMsPerMinute;
-  }
-}
-
-
-// Return whether or not daylight savings time is in effect at this time.
-bool Win32Time::InDST(TimezoneCache* cache) {
-  cache->InitializeIfNeeded();
-
-  // Determine if DST is in effect at the specified time.
-  bool in_dst = false;
-  if (cache->tzinfo_.StandardDate.wMonth != 0 ||
-      cache->tzinfo_.DaylightDate.wMonth != 0) {
-    // Get the local timezone offset for the timestamp in milliseconds.
-    int64_t offset = LocalOffset(cache);
-
-    // Compute the offset for DST. The bias parameters in the timezone info
-    // are specified in minutes. These must be converted to milliseconds.
-    int64_t dstofs =
-        -(cache->tzinfo_.Bias + cache->tzinfo_.DaylightBias) * kMsPerMinute;
-
-    // If the local time offset equals the timezone bias plus the daylight
-    // bias then DST is in effect.
-    in_dst = offset == dstofs;
-  }
-
-  return in_dst;
-}
-
-
-// Return the daylight savings time offset for this time.
-int64_t Win32Time::DaylightSavingsOffset(TimezoneCache* cache) {
-  return InDST(cache) ? 60 * kMsPerMinute : 0;
-}
-
-
-// Returns a string identifying the current timezone for the
-// timestamp taking into account daylight saving.
-char* Win32Time::LocalTimezone(TimezoneCache* cache) {
-  // Return the standard or DST time zone name based on whether daylight
-  // saving is in effect at the given time.
-  return InDST(cache) ? cache->dst_tz_name_ : cache->std_tz_name_;
-}
-
-
-// Returns the accumulated user time for thread.
-int OS::GetUserTime(uint32_t* secs,  uint32_t* usecs) {
-  FILETIME dummy;
-  uint64_t usertime;
-
-  // Get the amount of time that the thread has executed in user mode.
-  if (!GetThreadTimes(GetCurrentThread(), &dummy, &dummy, &dummy,
-                      reinterpret_cast<FILETIME*>(&usertime))) return -1;
-
-  // Adjust the resolution to micro-seconds.
-  usertime /= 10;
-
-  // Convert to seconds and microseconds
-  *secs = static_cast<uint32_t>(usertime / 1000000);
-  *usecs = static_cast<uint32_t>(usertime % 1000000);
-  return 0;
-}
-
-
-// Returns current time as the number of milliseconds since
-// 00:00:00 UTC, January 1, 1970.
-double OS::TimeCurrentMillis() {
-  return Time::Now().ToJsTime();
-}
-
-
-TimezoneCache* OS::CreateTimezoneCache() {
-  return new TimezoneCache();
-}
-
-
-void OS::DisposeTimezoneCache(TimezoneCache* cache) {
-  delete cache;
-}
-
-
-void OS::ClearTimezoneCache(TimezoneCache* cache) {
-  cache->Clear();
-}
-
-
-// Returns a string identifying the current timezone taking into
-// account daylight saving.
-const char* OS::LocalTimezone(double time, TimezoneCache* cache) {
-  return Win32Time(time).LocalTimezone(cache);
-}
-
-
-// Returns the local time offset in milliseconds east of UTC without
-// taking daylight savings time into account.
-double OS::LocalTimeOffset(TimezoneCache* cache) {
-  // Use current time, rounded to the millisecond.
-  Win32Time t(TimeCurrentMillis());
-  // Time::LocalOffset inlcudes any daylight savings offset, so subtract it.
-  return static_cast<double>(t.LocalOffset(cache) -
-                             t.DaylightSavingsOffset(cache));
-}
-
-
-// Returns the daylight savings offset in milliseconds for the given
-// time.
-double OS::DaylightSavingsOffset(double time, TimezoneCache* cache) {
-  int64_t offset = Win32Time(time).DaylightSavingsOffset(cache);
-  return static_cast<double>(offset);
-}
-
-
-int OS::GetLastError() {
-  return ::GetLastError();
-}
-
-
-int OS::GetCurrentProcessId() {
-  return static_cast<int>(::GetCurrentProcessId());
-}
-
-
-// ----------------------------------------------------------------------------
-// Win32 console output.
-//
-// If a Win32 application is linked as a console application it has a normal
-// standard output and standard error. In this case normal printf works fine
-// for output. However, if the application is linked as a GUI application,
-// the process doesn't have a console, and therefore (debugging) output is lost.
-// This is the case if we are embedded in a windows program (like a browser).
-// In order to be able to get debug output in this case the the debugging
-// facility using OutputDebugString. This output goes to the active debugger
-// for the process (if any). Else the output can be monitored using DBMON.EXE.
-
-enum OutputMode {
-  UNKNOWN,  // Output method has not yet been determined.
-  CONSOLE,  // Output is written to stdout.
-  ODS       // Output is written to debug facility.
-};
-
-static OutputMode output_mode = UNKNOWN;  // Current output mode.
-
-
-// Determine if the process has a console for output.
-static bool HasConsole() {
-  // Only check the first time. Eventual race conditions are not a problem,
-  // because all threads will eventually determine the same mode.
-  if (output_mode == UNKNOWN) {
-    // We cannot just check that the standard output is attached to a console
-    // because this would fail if output is redirected to a file. Therefore we
-    // say that a process does not have an output console if either the
-    // standard output handle is invalid or its file type is unknown.
-    if (GetStdHandle(STD_OUTPUT_HANDLE) != INVALID_HANDLE_VALUE &&
-        GetFileType(GetStdHandle(STD_OUTPUT_HANDLE)) != FILE_TYPE_UNKNOWN)
-      output_mode = CONSOLE;
-    else
-      output_mode = ODS;
-  }
-  return output_mode == CONSOLE;
-}
-
-
-static void VPrintHelper(FILE* stream, const char* format, va_list args) {
-  if ((stream == stdout || stream == stderr) && !HasConsole()) {
-    // It is important to use safe print here in order to avoid
-    // overflowing the buffer. We might truncate the output, but this
-    // does not crash.
-    char buffer[4096];
-    OS::VSNPrintF(buffer, sizeof(buffer), format, args);
-    OutputDebugStringA(buffer);
-  } else {
-    vfprintf(stream, format, args);
-  }
-}
-
-
-FILE* OS::FOpen(const char* path, const char* mode) {
-  FILE* result;
-  if (fopen_s(&result, path, mode) == 0) {
-    return result;
-  } else {
-    return NULL;
-  }
-}
-
-
-bool OS::Remove(const char* path) {
-  return (DeleteFileA(path) != 0);
-}
-
-
-FILE* OS::OpenTemporaryFile() {
-  // tmpfile_s tries to use the root dir, don't use it.
-  char tempPathBuffer[MAX_PATH];
-  DWORD path_result = 0;
-  path_result = GetTempPathA(MAX_PATH, tempPathBuffer);
-  if (path_result > MAX_PATH || path_result == 0) return NULL;
-  UINT name_result = 0;
-  char tempNameBuffer[MAX_PATH];
-  name_result = GetTempFileNameA(tempPathBuffer, "", 0, tempNameBuffer);
-  if (name_result == 0) return NULL;
-  FILE* result = FOpen(tempNameBuffer, "w+");  // Same mode as tmpfile uses.
-  if (result != NULL) {
-    Remove(tempNameBuffer);  // Delete on close.
-  }
-  return result;
-}
-
-
-// Open log file in binary mode to avoid /n -> /r/n conversion.
-const char* const OS::LogFileOpenMode = "wb";
-
-
-// Print (debug) message to console.
-void OS::Print(const char* format, ...) {
-  va_list args;
-  va_start(args, format);
-  VPrint(format, args);
-  va_end(args);
-}
-
-
-void OS::VPrint(const char* format, va_list args) {
-  VPrintHelper(stdout, format, args);
-}
-
-
-void OS::FPrint(FILE* out, const char* format, ...) {
-  va_list args;
-  va_start(args, format);
-  VFPrint(out, format, args);
-  va_end(args);
-}
-
-
-void OS::VFPrint(FILE* out, const char* format, va_list args) {
-  VPrintHelper(out, format, args);
-}
-
-
-// Print error message to console.
-void OS::PrintError(const char* format, ...) {
-  va_list args;
-  va_start(args, format);
-  VPrintError(format, args);
-  va_end(args);
-}
-
-
-void OS::VPrintError(const char* format, va_list args) {
-  VPrintHelper(stderr, format, args);
-}
-
-
-int OS::SNPrintF(char* str, int length, const char* format, ...) {
-  va_list args;
-  va_start(args, format);
-  int result = VSNPrintF(str, length, format, args);
-  va_end(args);
-  return result;
-}
-
-
-int OS::VSNPrintF(char* str, int length, const char* format, va_list args) {
-  int n = _vsnprintf_s(str, length, _TRUNCATE, format, args);
-  // Make sure to zero-terminate the string if the output was
-  // truncated or if there was an error.
-  if (n < 0 || n >= length) {
-    if (length > 0)
-      str[length - 1] = '\0';
-    return -1;
-  } else {
-    return n;
-  }
-}
-
-
-char* OS::StrChr(char* str, int c) {
-  return const_cast<char*>(strchr(str, c));
-}
-
-
-void OS::StrNCpy(char* dest, int length, const char* src, size_t n) {
-  // Use _TRUNCATE or strncpy_s crashes (by design) if buffer is too small.
-  size_t buffer_size = static_cast<size_t>(length);
-  if (n + 1 > buffer_size)  // count for trailing '\0'
-    n = _TRUNCATE;
-  int result = strncpy_s(dest, length, src, n);
-  USE(result);
-  ASSERT(result == 0 || (n == _TRUNCATE && result == STRUNCATE));
-}
-
-
-#undef _TRUNCATE
-#undef STRUNCATE
-
-
-// Get the system's page size used by VirtualAlloc() or the next power
-// of two. The reason for always returning a power of two is that the
-// rounding up in OS::Allocate expects that.
-static size_t GetPageSize() {
-  static size_t page_size = 0;
-  if (page_size == 0) {
-    SYSTEM_INFO info;
-    GetSystemInfo(&info);
-    page_size = RoundUpToPowerOf2(info.dwPageSize);
-  }
-  return page_size;
-}
-
-
-// The allocation alignment is the guaranteed alignment for
-// VirtualAlloc'ed blocks of memory.
-size_t OS::AllocateAlignment() {
-  static size_t allocate_alignment = 0;
-  if (allocate_alignment == 0) {
-    SYSTEM_INFO info;
-    GetSystemInfo(&info);
-    allocate_alignment = info.dwAllocationGranularity;
-  }
-  return allocate_alignment;
-}
-
-
-static base::LazyInstance<RandomNumberGenerator>::type
-    platform_random_number_generator = LAZY_INSTANCE_INITIALIZER;
-
-
-void OS::Initialize(int64_t random_seed, bool hard_abort,
-                    const char* const gc_fake_mmap) {
-  if (random_seed) {
-    platform_random_number_generator.Pointer()->SetSeed(random_seed);
-  }
-  g_hard_abort = hard_abort;
-}
-
-
-void* OS::GetRandomMmapAddr() {
-  // The address range used to randomize RWX allocations in OS::Allocate
-  // Try not to map pages into the default range that windows loads DLLs
-  // Use a multiple of 64k to prevent committing unused memory.
-  // Note: This does not guarantee RWX regions will be within the
-  // range kAllocationRandomAddressMin to kAllocationRandomAddressMax
-#ifdef V8_HOST_ARCH_64_BIT
-  static const intptr_t kAllocationRandomAddressMin = 0x0000000080000000;
-  static const intptr_t kAllocationRandomAddressMax = 0x000003FFFFFF0000;
-#else
-  static const intptr_t kAllocationRandomAddressMin = 0x04000000;
-  static const intptr_t kAllocationRandomAddressMax = 0x3FFF0000;
-#endif
-  uintptr_t address =
-      (platform_random_number_generator.Pointer()->NextInt() << kPageSizeBits) |
-      kAllocationRandomAddressMin;
-  address &= kAllocationRandomAddressMax;
-  return reinterpret_cast<void *>(address);
-}
-
-
-static void* RandomizedVirtualAlloc(size_t size, int action, int protection) {
-  LPVOID base = NULL;
-
-  if (protection == PAGE_EXECUTE_READWRITE || protection == PAGE_NOACCESS) {
-    // For exectutable pages try and randomize the allocation address
-    for (size_t attempts = 0; base == NULL && attempts < 3; ++attempts) {
-      base = VirtualAlloc(OS::GetRandomMmapAddr(), size, action, protection);
-    }
-  }
-
-  // After three attempts give up and let the OS find an address to use.
-  if (base == NULL) base = VirtualAlloc(NULL, size, action, protection);
-
-  return base;
-}
-
-
-void* OS::Allocate(const size_t requested,
-                   size_t* allocated,
-                   bool is_executable) {
-  // VirtualAlloc rounds allocated size to page size automatically.
-  size_t msize = RoundUp(requested, static_cast<int>(GetPageSize()));
-
-  // Windows XP SP2 allows Data Excution Prevention (DEP).
-  int prot = is_executable ? PAGE_EXECUTE_READWRITE : PAGE_READWRITE;
-
-  LPVOID mbase = RandomizedVirtualAlloc(msize,
-                                        MEM_COMMIT | MEM_RESERVE,
-                                        prot);
-
-  if (mbase == NULL) return NULL;
-
-  ASSERT(IsAligned(reinterpret_cast<size_t>(mbase), OS::AllocateAlignment()));
-
-  *allocated = msize;
-  return mbase;
-}
-
-
-void OS::Free(void* address, const size_t size) {
-  // TODO(1240712): VirtualFree has a return value which is ignored here.
-  VirtualFree(address, 0, MEM_RELEASE);
-  USE(size);
-}
-
-
-intptr_t OS::CommitPageSize() {
-  return 4096;
-}
-
-
-void OS::ProtectCode(void* address, const size_t size) {
-  DWORD old_protect;
-  VirtualProtect(address, size, PAGE_EXECUTE_READ, &old_protect);
-}
-
-
-void OS::Guard(void* address, const size_t size) {
-  DWORD oldprotect;
-  VirtualProtect(address, size, PAGE_NOACCESS, &oldprotect);
-}
-
-
-void OS::Sleep(int milliseconds) {
-  ::Sleep(milliseconds);
-}
-
-
-void OS::Abort() {
-  if (g_hard_abort) {
-    V8_IMMEDIATE_CRASH();
-  }
-  // Make the MSVCRT do a silent abort.
-  raise(SIGABRT);
-}
-
-
-void OS::DebugBreak() {
-#ifdef _MSC_VER
-  // To avoid Visual Studio runtime support the following code can be used
-  // instead
-  // __asm { int 3 }
-  __debugbreak();
-#else
-  ::DebugBreak();
-#endif
-}
-
-
-class Win32MemoryMappedFile : public OS::MemoryMappedFile {
- public:
-  Win32MemoryMappedFile(HANDLE file,
-                        HANDLE file_mapping,
-                        void* memory,
-                        int size)
-      : file_(file),
-        file_mapping_(file_mapping),
-        memory_(memory),
-        size_(size) { }
-  virtual ~Win32MemoryMappedFile();
-  virtual void* memory() { return memory_; }
-  virtual int size() { return size_; }
- private:
-  HANDLE file_;
-  HANDLE file_mapping_;
-  void* memory_;
-  int size_;
-};
-
-
-OS::MemoryMappedFile* OS::MemoryMappedFile::open(const char* name) {
-  // Open a physical file
-  HANDLE file = CreateFileA(name, GENERIC_READ | GENERIC_WRITE,
-      FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, NULL);
-  if (file == INVALID_HANDLE_VALUE) return NULL;
-
-  int size = static_cast<int>(GetFileSize(file, NULL));
-
-  // Create a file mapping for the physical file
-  HANDLE file_mapping = CreateFileMapping(file, NULL,
-      PAGE_READWRITE, 0, static_cast<DWORD>(size), NULL);
-  if (file_mapping == NULL) return NULL;
-
-  // Map a view of the file into memory
-  void* memory = MapViewOfFile(file_mapping, FILE_MAP_ALL_ACCESS, 0, 0, size);
-  return new Win32MemoryMappedFile(file, file_mapping, memory, size);
-}
-
-
-OS::MemoryMappedFile* OS::MemoryMappedFile::create(const char* name, int size,
-    void* initial) {
-  // Open a physical file
-  HANDLE file = CreateFileA(name, GENERIC_READ | GENERIC_WRITE,
-      FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_ALWAYS, 0, NULL);
-  if (file == NULL) return NULL;
-  // Create a file mapping for the physical file
-  HANDLE file_mapping = CreateFileMapping(file, NULL,
-      PAGE_READWRITE, 0, static_cast<DWORD>(size), NULL);
-  if (file_mapping == NULL) return NULL;
-  // Map a view of the file into memory
-  void* memory = MapViewOfFile(file_mapping, FILE_MAP_ALL_ACCESS, 0, 0, size);
-  if (memory) MemMove(memory, initial, size);
-  return new Win32MemoryMappedFile(file, file_mapping, memory, size);
-}
-
-
-Win32MemoryMappedFile::~Win32MemoryMappedFile() {
-  if (memory_ != NULL)
-    UnmapViewOfFile(memory_);
-  CloseHandle(file_mapping_);
-  CloseHandle(file_);
-}
-
-
-// The following code loads functions defined in DbhHelp.h and TlHelp32.h
-// dynamically. This is to avoid being depending on dbghelp.dll and
-// tlhelp32.dll when running (the functions in tlhelp32.dll have been moved to
-// kernel32.dll at some point so loading functions defines in TlHelp32.h
-// dynamically might not be necessary any more - for some versions of Windows?).
-
-// Function pointers to functions dynamically loaded from dbghelp.dll.
-#define DBGHELP_FUNCTION_LIST(V)  \
-  V(SymInitialize)                \
-  V(SymGetOptions)                \
-  V(SymSetOptions)                \
-  V(SymGetSearchPath)             \
-  V(SymLoadModule64)              \
-  V(StackWalk64)                  \
-  V(SymGetSymFromAddr64)          \
-  V(SymGetLineFromAddr64)         \
-  V(SymFunctionTableAccess64)     \
-  V(SymGetModuleBase64)
-
-// Function pointers to functions dynamically loaded from dbghelp.dll.
-#define TLHELP32_FUNCTION_LIST(V)  \
-  V(CreateToolhelp32Snapshot)      \
-  V(Module32FirstW)                \
-  V(Module32NextW)
-
-// Define the decoration to use for the type and variable name used for
-// dynamically loaded DLL function..
-#define DLL_FUNC_TYPE(name) _##name##_
-#define DLL_FUNC_VAR(name) _##name
-
-// Define the type for each dynamically loaded DLL function. The function
-// definitions are copied from DbgHelp.h and TlHelp32.h. The IN and VOID macros
-// from the Windows include files are redefined here to have the function
-// definitions to be as close to the ones in the original .h files as possible.
-#ifndef IN
-#define IN
-#endif
-#ifndef VOID
-#define VOID void
-#endif
-
-// DbgHelp isn't supported on MinGW yet
-#ifndef __MINGW32__
-// DbgHelp.h functions.
-typedef BOOL (__stdcall *DLL_FUNC_TYPE(SymInitialize))(IN HANDLE hProcess,
-                                                       IN PSTR UserSearchPath,
-                                                       IN BOOL fInvadeProcess);
-typedef DWORD (__stdcall *DLL_FUNC_TYPE(SymGetOptions))(VOID);
-typedef DWORD (__stdcall *DLL_FUNC_TYPE(SymSetOptions))(IN DWORD SymOptions);
-typedef BOOL (__stdcall *DLL_FUNC_TYPE(SymGetSearchPath))(
-    IN HANDLE hProcess,
-    OUT PSTR SearchPath,
-    IN DWORD SearchPathLength);
-typedef DWORD64 (__stdcall *DLL_FUNC_TYPE(SymLoadModule64))(
-    IN HANDLE hProcess,
-    IN HANDLE hFile,
-    IN PSTR ImageName,
-    IN PSTR ModuleName,
-    IN DWORD64 BaseOfDll,
-    IN DWORD SizeOfDll);
-typedef BOOL (__stdcall *DLL_FUNC_TYPE(StackWalk64))(
-    DWORD MachineType,
-    HANDLE hProcess,
-    HANDLE hThread,
-    LPSTACKFRAME64 StackFrame,
-    PVOID ContextRecord,
-    PREAD_PROCESS_MEMORY_ROUTINE64 ReadMemoryRoutine,
-    PFUNCTION_TABLE_ACCESS_ROUTINE64 FunctionTableAccessRoutine,
-    PGET_MODULE_BASE_ROUTINE64 GetModuleBaseRoutine,
-    PTRANSLATE_ADDRESS_ROUTINE64 TranslateAddress);
-typedef BOOL (__stdcall *DLL_FUNC_TYPE(SymGetSymFromAddr64))(
-    IN HANDLE hProcess,
-    IN DWORD64 qwAddr,
-    OUT PDWORD64 pdwDisplacement,
-    OUT PIMAGEHLP_SYMBOL64 Symbol);
-typedef BOOL (__stdcall *DLL_FUNC_TYPE(SymGetLineFromAddr64))(
-    IN HANDLE hProcess,
-    IN DWORD64 qwAddr,
-    OUT PDWORD pdwDisplacement,
-    OUT PIMAGEHLP_LINE64 Line64);
-// DbgHelp.h typedefs. Implementation found in dbghelp.dll.
-typedef PVOID (__stdcall *DLL_FUNC_TYPE(SymFunctionTableAccess64))(
-    HANDLE hProcess,
-    DWORD64 AddrBase);  // DbgHelp.h typedef PFUNCTION_TABLE_ACCESS_ROUTINE64
-typedef DWORD64 (__stdcall *DLL_FUNC_TYPE(SymGetModuleBase64))(
-    HANDLE hProcess,
-    DWORD64 AddrBase);  // DbgHelp.h typedef PGET_MODULE_BASE_ROUTINE64
-
-// TlHelp32.h functions.
-typedef HANDLE (__stdcall *DLL_FUNC_TYPE(CreateToolhelp32Snapshot))(
-    DWORD dwFlags,
-    DWORD th32ProcessID);
-typedef BOOL (__stdcall *DLL_FUNC_TYPE(Module32FirstW))(HANDLE hSnapshot,
-                                                        LPMODULEENTRY32W lpme);
-typedef BOOL (__stdcall *DLL_FUNC_TYPE(Module32NextW))(HANDLE hSnapshot,
-                                                       LPMODULEENTRY32W lpme);
-
-#undef IN
-#undef VOID
-
-// Declare a variable for each dynamically loaded DLL function.
-#define DEF_DLL_FUNCTION(name) DLL_FUNC_TYPE(name) DLL_FUNC_VAR(name) = NULL;
-DBGHELP_FUNCTION_LIST(DEF_DLL_FUNCTION)
-TLHELP32_FUNCTION_LIST(DEF_DLL_FUNCTION)
-#undef DEF_DLL_FUNCTION
-
-// Load the functions. This function has a lot of "ugly" macros in order to
-// keep down code duplication.
-
-static bool LoadDbgHelpAndTlHelp32() {
-  static bool dbghelp_loaded = false;
-
-  if (dbghelp_loaded) return true;
-
-  HMODULE module;
-
-  // Load functions from the dbghelp.dll module.
-  module = LoadLibrary(TEXT("dbghelp.dll"));
-  if (module == NULL) {
-    return false;
-  }
-
-#define LOAD_DLL_FUNC(name)                                                 \
-  DLL_FUNC_VAR(name) =                                                      \
-      reinterpret_cast<DLL_FUNC_TYPE(name)>(GetProcAddress(module, #name));
-
-DBGHELP_FUNCTION_LIST(LOAD_DLL_FUNC)
-
-#undef LOAD_DLL_FUNC
-
-  // Load functions from the kernel32.dll module (the TlHelp32.h function used
-  // to be in tlhelp32.dll but are now moved to kernel32.dll).
-  module = LoadLibrary(TEXT("kernel32.dll"));
-  if (module == NULL) {
-    return false;
-  }
-
-#define LOAD_DLL_FUNC(name)                                                 \
-  DLL_FUNC_VAR(name) =                                                      \
-      reinterpret_cast<DLL_FUNC_TYPE(name)>(GetProcAddress(module, #name));
-
-TLHELP32_FUNCTION_LIST(LOAD_DLL_FUNC)
-
-#undef LOAD_DLL_FUNC
-
-  // Check that all functions where loaded.
-  bool result =
-#define DLL_FUNC_LOADED(name) (DLL_FUNC_VAR(name) != NULL) &&
-
-DBGHELP_FUNCTION_LIST(DLL_FUNC_LOADED)
-TLHELP32_FUNCTION_LIST(DLL_FUNC_LOADED)
-
-#undef DLL_FUNC_LOADED
-  true;
-
-  dbghelp_loaded = result;
-  return result;
-  // NOTE: The modules are never unloaded and will stay around until the
-  // application is closed.
-}
-
-#undef DBGHELP_FUNCTION_LIST
-#undef TLHELP32_FUNCTION_LIST
-#undef DLL_FUNC_VAR
-#undef DLL_FUNC_TYPE
-
-
-// Load the symbols for generating stack traces.
-static std::vector<OS::SharedLibraryAddress> LoadSymbols(
-    HANDLE process_handle) {
-  static std::vector<OS::SharedLibraryAddress> result;
-
-  static bool symbols_loaded = false;
-
-  if (symbols_loaded) return result;
-
-  BOOL ok;
-
-  // Initialize the symbol engine.
-  ok = _SymInitialize(process_handle,  // hProcess
-                      NULL,            // UserSearchPath
-                      false);          // fInvadeProcess
-  if (!ok) return result;
-
-  DWORD options = _SymGetOptions();
-  options |= SYMOPT_LOAD_LINES;
-  options |= SYMOPT_FAIL_CRITICAL_ERRORS;
-  options = _SymSetOptions(options);
-
-  char buf[OS::kStackWalkMaxNameLen] = {0};
-  ok = _SymGetSearchPath(process_handle, buf, OS::kStackWalkMaxNameLen);
-  if (!ok) {
-    int err = GetLastError();
-    PrintF("%d\n", err);
-    return result;
-  }
-
-  HANDLE snapshot = _CreateToolhelp32Snapshot(
-      TH32CS_SNAPMODULE,       // dwFlags
-      GetCurrentProcessId());  // th32ProcessId
-  if (snapshot == INVALID_HANDLE_VALUE) return result;
-  MODULEENTRY32W module_entry;
-  module_entry.dwSize = sizeof(module_entry);  // Set the size of the structure.
-  BOOL cont = _Module32FirstW(snapshot, &module_entry);
-  while (cont) {
-    DWORD64 base;
-    // NOTE the SymLoadModule64 function has the peculiarity of accepting a
-    // both unicode and ASCII strings even though the parameter is PSTR.
-    base = _SymLoadModule64(
-        process_handle,                                       // hProcess
-        0,                                                    // hFile
-        reinterpret_cast<PSTR>(module_entry.szExePath),       // ImageName
-        reinterpret_cast<PSTR>(module_entry.szModule),        // ModuleName
-        reinterpret_cast<DWORD64>(module_entry.modBaseAddr),  // BaseOfDll
-        module_entry.modBaseSize);                            // SizeOfDll
-    if (base == 0) {
-      int err = GetLastError();
-      if (err != ERROR_MOD_NOT_FOUND &&
-          err != ERROR_INVALID_HANDLE) {
-        result.clear();
-        return result;
-      }
-    }
-    int lib_name_length = WideCharToMultiByte(
-        CP_UTF8, 0, module_entry.szExePath, -1, NULL, 0, NULL, NULL);
-    std::string lib_name(lib_name_length, 0);
-    WideCharToMultiByte(CP_UTF8, 0, module_entry.szExePath, -1, &lib_name[0],
-                        lib_name_length, NULL, NULL);
-    result.push_back(OS::SharedLibraryAddress(
-        lib_name, reinterpret_cast<unsigned int>(module_entry.modBaseAddr),
-        reinterpret_cast<unsigned int>(module_entry.modBaseAddr +
-                                       module_entry.modBaseSize)));
-    cont = _Module32NextW(snapshot, &module_entry);
-  }
-  CloseHandle(snapshot);
-
-  symbols_loaded = true;
-  return result;
-}
-
-
-std::vector<OS::SharedLibraryAddress> OS::GetSharedLibraryAddresses() {
-  // SharedLibraryEvents are logged when loading symbol information.
-  // Only the shared libraries loaded at the time of the call to
-  // GetSharedLibraryAddresses are logged.  DLLs loaded after
-  // initialization are not accounted for.
-  if (!LoadDbgHelpAndTlHelp32()) return std::vector<OS::SharedLibraryAddress>();
-  HANDLE process_handle = GetCurrentProcess();
-  return LoadSymbols(process_handle);
-}
-
-
-void OS::SignalCodeMovingGC() {
-}
-
-
-uint64_t OS::TotalPhysicalMemory() {
-  MEMORYSTATUSEX memory_info;
-  memory_info.dwLength = sizeof(memory_info);
-  if (!GlobalMemoryStatusEx(&memory_info)) {
-    UNREACHABLE();
-    return 0;
-  }
-
-  return static_cast<uint64_t>(memory_info.ullTotalPhys);
-}
-
-
-#else  // __MINGW32__
-std::vector<OS::SharedLibraryAddress> OS::GetSharedLibraryAddresses() {
-  return std::vector<OS::SharedLibraryAddress>();
-}
-
-
-void OS::SignalCodeMovingGC() { }
-#endif  // __MINGW32__
-
-
-int OS::NumberOfProcessorsOnline() {
-  SYSTEM_INFO info;
-  GetSystemInfo(&info);
-  return info.dwNumberOfProcessors;
-}
-
-
-double OS::nan_value() {
-#ifdef _MSC_VER
-  // Positive Quiet NaN with no payload (aka. Indeterminate) has all bits
-  // in mask set, so value equals mask.
-  static const __int64 nanval = kQuietNaNMask;
-  return *reinterpret_cast<const double*>(&nanval);
-#else  // _MSC_VER
-  return NAN;
-#endif  // _MSC_VER
-}
-
-
-int OS::ActivationFrameAlignment() {
-#ifdef _WIN64
-  return 16;  // Windows 64-bit ABI requires the stack to be 16-byte aligned.
-#elif defined(__MINGW32__)
-  // With gcc 4.4 the tree vectorization optimizer can generate code
-  // that requires 16 byte alignment such as movdqa on x86.
-  return 16;
-#else
-  return 8;  // Floating-point math runs faster with 8-byte alignment.
-#endif
-}
-
-
-VirtualMemory::VirtualMemory() : address_(NULL), size_(0) { }
-
-
-VirtualMemory::VirtualMemory(size_t size)
-    : address_(ReserveRegion(size)), size_(size) { }
-
-
-VirtualMemory::VirtualMemory(size_t size, size_t alignment)
-    : address_(NULL), size_(0) {
-  ASSERT(IsAligned(alignment, static_cast<intptr_t>(OS::AllocateAlignment())));
-  size_t request_size = RoundUp(size + alignment,
-                                static_cast<intptr_t>(OS::AllocateAlignment()));
-  void* address = ReserveRegion(request_size);
-  if (address == NULL) return;
-  uint8_t* base = RoundUp(static_cast<uint8_t*>(address), alignment);
-  // Try reducing the size by freeing and then reallocating a specific area.
-  bool result = ReleaseRegion(address, request_size);
-  USE(result);
-  ASSERT(result);
-  address = VirtualAlloc(base, size, MEM_RESERVE, PAGE_NOACCESS);
-  if (address != NULL) {
-    request_size = size;
-    ASSERT(base == static_cast<uint8_t*>(address));
-  } else {
-    // Resizing failed, just go with a bigger area.
-    address = ReserveRegion(request_size);
-    if (address == NULL) return;
-  }
-  address_ = address;
-  size_ = request_size;
-}
-
-
-VirtualMemory::~VirtualMemory() {
-  if (IsReserved()) {
-    bool result = ReleaseRegion(address(), size());
-    ASSERT(result);
-    USE(result);
-  }
-}
-
-
-bool VirtualMemory::IsReserved() {
-  return address_ != NULL;
-}
-
-
-void VirtualMemory::Reset() {
-  address_ = NULL;
-  size_ = 0;
-}
-
-
-bool VirtualMemory::Commit(void* address, size_t size, bool is_executable) {
-  return CommitRegion(address, size, is_executable);
-}
-
-
-bool VirtualMemory::Uncommit(void* address, size_t size) {
-  ASSERT(IsReserved());
-  return UncommitRegion(address, size);
-}
-
-
-bool VirtualMemory::Guard(void* address) {
-  if (NULL == VirtualAlloc(address,
-                           OS::CommitPageSize(),
-                           MEM_COMMIT,
-                           PAGE_NOACCESS)) {
-    return false;
-  }
-  return true;
-}
-
-
-void* VirtualMemory::ReserveRegion(size_t size) {
-  return RandomizedVirtualAlloc(size, MEM_RESERVE, PAGE_NOACCESS);
-}
-
-
-bool VirtualMemory::CommitRegion(void* base, size_t size, bool is_executable) {
-  int prot = is_executable ? PAGE_EXECUTE_READWRITE : PAGE_READWRITE;
-  if (NULL == VirtualAlloc(base, size, MEM_COMMIT, prot)) {
-    return false;
-  }
-  return true;
-}
-
-
-bool VirtualMemory::UncommitRegion(void* base, size_t size) {
-  return VirtualFree(base, size, MEM_DECOMMIT) != 0;
-}
-
-
-bool VirtualMemory::ReleaseRegion(void* base, size_t size) {
-  return VirtualFree(base, 0, MEM_RELEASE) != 0;
-}
-
-
-bool VirtualMemory::HasLazyCommits() {
-  // TODO(alph): implement for the platform.
-  return false;
-}
-
-
-// ----------------------------------------------------------------------------
-// Win32 thread support.
-
-// Definition of invalid thread handle and id.
-static const HANDLE kNoThread = INVALID_HANDLE_VALUE;
-
-// Entry point for threads. The supplied argument is a pointer to the thread
-// object. The entry function dispatches to the run method in the thread
-// object. It is important that this function has __stdcall calling
-// convention.
-static unsigned int __stdcall ThreadEntry(void* arg) {
-  Thread* thread = reinterpret_cast<Thread*>(arg);
-  thread->NotifyStartedAndRun();
-  return 0;
-}
-
-
-class Thread::PlatformData {
- public:
-  explicit PlatformData(HANDLE thread) : thread_(thread) {}
-  HANDLE thread_;
-  unsigned thread_id_;
-};
-
-
-// Initialize a Win32 thread object. The thread has an invalid thread
-// handle until it is started.
-
-Thread::Thread(const Options& options)
-    : stack_size_(options.stack_size()),
-      start_semaphore_(NULL) {
-  data_ = new PlatformData(kNoThread);
-  set_name(options.name());
-}
-
-
-void Thread::set_name(const char* name) {
-  OS::StrNCpy(name_, sizeof(name_), name, strlen(name));
-  name_[sizeof(name_) - 1] = '\0';
-}
-
-
-// Close our own handle for the thread.
-Thread::~Thread() {
-  if (data_->thread_ != kNoThread) CloseHandle(data_->thread_);
-  delete data_;
-}
-
-
-// Create a new thread. It is important to use _beginthreadex() instead of
-// the Win32 function CreateThread(), because the CreateThread() does not
-// initialize thread specific structures in the C runtime library.
-void Thread::Start() {
-  data_->thread_ = reinterpret_cast<HANDLE>(
-      _beginthreadex(NULL,
-                     static_cast<unsigned>(stack_size_),
-                     ThreadEntry,
-                     this,
-                     0,
-                     &data_->thread_id_));
-}
-
-
-// Wait for thread to terminate.
-void Thread::Join() {
-  if (data_->thread_id_ != GetCurrentThreadId()) {
-    WaitForSingleObject(data_->thread_, INFINITE);
-  }
-}
-
-
-Thread::LocalStorageKey Thread::CreateThreadLocalKey() {
-  DWORD result = TlsAlloc();
-  ASSERT(result != TLS_OUT_OF_INDEXES);
-  return static_cast<LocalStorageKey>(result);
-}
-
-
-void Thread::DeleteThreadLocalKey(LocalStorageKey key) {
-  BOOL result = TlsFree(static_cast<DWORD>(key));
-  USE(result);
-  ASSERT(result);
-}
-
-
-void* Thread::GetThreadLocal(LocalStorageKey key) {
-  return TlsGetValue(static_cast<DWORD>(key));
-}
-
-
-void Thread::SetThreadLocal(LocalStorageKey key, void* value) {
-  BOOL result = TlsSetValue(static_cast<DWORD>(key), value);
-  USE(result);
-  ASSERT(result);
-}
-
-
-
-void Thread::YieldCPU() {
-  Sleep(0);
-}
-
-} }  // namespace v8::internal