Rename Thread -> OSThread.

runtime/vm/thread_win.cc

Index: runtime/vm/thread_win.cc
===================================================================
--- runtime/vm/thread_win.cc	(revision 42893)
+++ runtime/vm/thread_win.cc	(working copy)
@@ -1,461 +0,0 @@
-// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-#include "platform/globals.h"
-#if defined(TARGET_OS_WINDOWS)
-
-#include "vm/thread.h"
-
-#include <process.h>  // NOLINT
-
-#include "platform/assert.h"
-#include "vm/isolate.h"
-
-namespace dart {
-
-class ThreadStartData {
- public:
-  ThreadStartData(Thread::ThreadStartFunction function, uword parameter)
-      : function_(function), parameter_(parameter) {}
-
-  Thread::ThreadStartFunction function() const { return function_; }
-  uword parameter() const { return parameter_; }
-
- private:
-  Thread::ThreadStartFunction function_;
-  uword parameter_;
-
-  DISALLOW_COPY_AND_ASSIGN(ThreadStartData);
-};
-
-
-// Dispatch to the thread start function provided by the caller. This trampoline
-// is used to ensure that the thread is properly destroyed if the thread just
-// exits.
-static unsigned int __stdcall ThreadEntry(void* data_ptr) {
-  ThreadStartData* data = reinterpret_cast<ThreadStartData*>(data_ptr);
-
-  Thread::ThreadStartFunction function = data->function();
-  uword parameter = data->parameter();
-  delete data;
-
-  MonitorData::GetMonitorWaitDataForThread();
-
-  // Call the supplied thread start function handing it its parameters.
-  function(parameter);
-
-  // Clean up the monitor wait data for this thread.
-  MonitorWaitData::ThreadExit();
-
-  return 0;
-}
-
-
-int Thread::Start(ThreadStartFunction function, uword parameter) {
-  ThreadStartData* start_data = new ThreadStartData(function, parameter);
-  uint32_t tid;
-  uintptr_t thread = _beginthreadex(NULL, Thread::GetMaxStackSize(),
-                                    ThreadEntry, start_data, 0, &tid);
-  if (thread == -1L || thread == 0) {
-#ifdef DEBUG
-    fprintf(stderr, "_beginthreadex error: %d (%s)\n", errno, strerror(errno));
-#endif
-    return errno;
-  }
-
-  // Close the handle, so we don't leak the thread object.
-  CloseHandle(reinterpret_cast<HANDLE>(thread));
-
-  return 0;
-}
-
-ThreadLocalKey Thread::kUnsetThreadLocalKey = TLS_OUT_OF_INDEXES;
-ThreadId Thread::kInvalidThreadId = 0;
-
-ThreadLocalKey Thread::CreateThreadLocal() {
-  ThreadLocalKey key = TlsAlloc();
-  if (key == kUnsetThreadLocalKey) {
-    FATAL1("TlsAlloc failed %d", GetLastError());
-  }
-  return key;
-}
-
-
-void Thread::DeleteThreadLocal(ThreadLocalKey key) {
-  ASSERT(key != kUnsetThreadLocalKey);
-  BOOL result = TlsFree(key);
-  if (!result) {
-    FATAL1("TlsFree failed %d", GetLastError());
-  }
-}
-
-
-intptr_t Thread::GetMaxStackSize() {
-  const int kStackSize = (128 * kWordSize * KB);
-  return kStackSize;
-}
-
-
-ThreadId Thread::GetCurrentThreadId() {
-  return ::GetCurrentThreadId();
-}
-
-
-bool Thread::Join(ThreadId id) {
-  HANDLE handle = OpenThread(SYNCHRONIZE, false, id);
-  if (handle == INVALID_HANDLE_VALUE) {
-    return false;
-  }
-  DWORD res = WaitForSingleObject(handle, INFINITE);
-  CloseHandle(handle);
-  return res == WAIT_OBJECT_0;
-}
-
-
-intptr_t Thread::ThreadIdToIntPtr(ThreadId id) {
-  ASSERT(sizeof(id) <= sizeof(intptr_t));
-  return static_cast<intptr_t>(id);
-}
-
-
-bool Thread::Compare(ThreadId a, ThreadId b) {
-  return a == b;
-}
-
-
-void Thread::GetThreadCpuUsage(ThreadId thread_id, int64_t* cpu_usage) {
-  static const int64_t kTimeEpoc = 116444736000000000LL;
-  static const int64_t kTimeScaler = 10;  // 100 ns to us.
-  // 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. The Windows timestamp is in
-  // 100-nanosecond intervals since January 1, 1601.
-  union TimeStamp {
-    FILETIME ft_;
-    int64_t t_;
-  };
-  ASSERT(cpu_usage != NULL);
-  TimeStamp created;
-  TimeStamp exited;
-  TimeStamp kernel;
-  TimeStamp user;
-  HANDLE handle = OpenThread(THREAD_QUERY_INFORMATION, false, thread_id);
-  BOOL result = GetThreadTimes(handle,
-                               &created.ft_,
-                               &exited.ft_,
-                               &kernel.ft_,
-                               &user.ft_);
-  CloseHandle(handle);
-  if (!result) {
-    FATAL1("GetThreadCpuUsage failed %d\n", GetLastError());
-  }
-  *cpu_usage = (user.t_ - kTimeEpoc) / kTimeScaler;
-}
-
-
-void Thread::SetThreadLocal(ThreadLocalKey key, uword value) {
-  ASSERT(key != kUnsetThreadLocalKey);
-  BOOL result = TlsSetValue(key, reinterpret_cast<void*>(value));
-  if (!result) {
-    FATAL1("TlsSetValue failed %d", GetLastError());
-  }
-}
-
-
-Mutex::Mutex() {
-  // Allocate unnamed semaphore with initial count 1 and max count 1.
-  data_.semaphore_ = CreateSemaphore(NULL, 1, 1, NULL);
-  if (data_.semaphore_ == NULL) {
-    FATAL1("Mutex allocation failed %d", GetLastError());
-  }
-  // When running with assertions enabled we do track the owner.
-#if defined(DEBUG)
-  owner_ = NULL;
-#endif  // defined(DEBUG)
-}
-
-
-Mutex::~Mutex() {
-  CloseHandle(data_.semaphore_);
-  // When running with assertions enabled we do track the owner.
-#if defined(DEBUG)
-  ASSERT(owner_ == NULL);
-#endif  // defined(DEBUG)
-}
-
-
-void Mutex::Lock() {
-  DWORD result = WaitForSingleObject(data_.semaphore_, INFINITE);
-  if (result != WAIT_OBJECT_0) {
-    FATAL1("Mutex lock failed %d", GetLastError());
-  }
-  // When running with assertions enabled we do track the owner.
-#if defined(DEBUG)
-  owner_ = Isolate::Current();
-#endif  // defined(DEBUG)
-}
-
-
-bool Mutex::TryLock() {
-  // Attempt to pass the semaphore but return immediately.
-  DWORD result = WaitForSingleObject(data_.semaphore_, 0);
-  if (result == WAIT_OBJECT_0) {
-    // When running with assertions enabled we do track the owner.
-#if defined(DEBUG)
-    owner_ = Isolate::Current();
-#endif  // defined(DEBUG)
-    return true;
-  }
-  if (result == WAIT_ABANDONED || result == WAIT_FAILED) {
-    FATAL1("Mutex try lock failed %d", GetLastError());
-  }
-  ASSERT(result == WAIT_TIMEOUT);
-  return false;
-}
-
-
-void Mutex::Unlock() {
-  // When running with assertions enabled we do track the owner.
-#if defined(DEBUG)
-  ASSERT(owner_ == Isolate::Current());
-  owner_ = NULL;
-#endif  // defined(DEBUG)
-  BOOL result = ReleaseSemaphore(data_.semaphore_, 1, NULL);
-  if (result == 0) {
-    FATAL1("Mutex unlock failed %d", GetLastError());
-  }
-}
-
-
-ThreadLocalKey MonitorWaitData::monitor_wait_data_key_ =
-    Thread::kUnsetThreadLocalKey;
-
-
-Monitor::Monitor() {
-  InitializeCriticalSection(&data_.cs_);
-  InitializeCriticalSection(&data_.waiters_cs_);
-  data_.waiters_head_ = NULL;
-  data_.waiters_tail_ = NULL;
-}
-
-
-Monitor::~Monitor() {
-  DeleteCriticalSection(&data_.cs_);
-  DeleteCriticalSection(&data_.waiters_cs_);
-}
-
-
-void Monitor::Enter() {
-  EnterCriticalSection(&data_.cs_);
-}
-
-
-void Monitor::Exit() {
-  LeaveCriticalSection(&data_.cs_);
-}
-
-
-void MonitorWaitData::ThreadExit() {
-  if (MonitorWaitData::monitor_wait_data_key_ !=
-      Thread::kUnsetThreadLocalKey) {
-    uword raw_wait_data =
-      Thread::GetThreadLocal(MonitorWaitData::monitor_wait_data_key_);
-    if (raw_wait_data != 0) {
-      MonitorWaitData* wait_data =
-          reinterpret_cast<MonitorWaitData*>(raw_wait_data);
-      delete wait_data;
-    }
-  }
-}
-
-
-void MonitorData::AddWaiter(MonitorWaitData* wait_data) {
-  // Add the MonitorWaitData object to the list of objects waiting for
-  // this monitor.
-  EnterCriticalSection(&waiters_cs_);
-  if (waiters_tail_ == NULL) {
-    ASSERT(waiters_head_ == NULL);
-    waiters_head_ = waiters_tail_ = wait_data;
-  } else {
-    waiters_tail_->next_ = wait_data;
-    waiters_tail_ = wait_data;
-  }
-  LeaveCriticalSection(&waiters_cs_);
-}
-
-
-void MonitorData::RemoveWaiter(MonitorWaitData* wait_data) {
-  // Remove the MonitorWaitData object from the list of objects
-  // waiting for this monitor.
-  EnterCriticalSection(&waiters_cs_);
-  MonitorWaitData* previous = NULL;
-  MonitorWaitData* current = waiters_head_;
-  while (current != NULL) {
-    if (current == wait_data) {
-      if (waiters_head_ == waiters_tail_) {
-        waiters_head_ = waiters_tail_ = NULL;
-      } else if (current == waiters_head_) {
-        waiters_head_ = waiters_head_->next_;
-      } else if (current == waiters_tail_) {
-        ASSERT(previous != NULL);
-        waiters_tail_ = previous;
-        previous->next_ = NULL;
-      } else {
-        ASSERT(previous != NULL);
-        previous->next_ = current->next_;
-      }
-      // Clear next.
-      wait_data->next_ = NULL;
-      break;
-    }
-    previous = current;
-    current = current->next_;
-  }
-  LeaveCriticalSection(&waiters_cs_);
-}
-
-
-void MonitorData::SignalAndRemoveFirstWaiter() {
-  EnterCriticalSection(&waiters_cs_);
-  MonitorWaitData* first = waiters_head_;
-  if (first != NULL) {
-    // Remove from list.
-    if (waiters_head_ == waiters_tail_) {
-      waiters_tail_ = waiters_head_ = NULL;
-    } else {
-      waiters_head_ = waiters_head_->next_;
-    }
-    // Clear next.
-    first->next_ = NULL;
-    // Signal event.
-    BOOL result = SetEvent(first->event_);
-    if (result == 0) {
-      FATAL1("Monitor::Notify failed to signal event %d", GetLastError());
-    }
-  }
-  LeaveCriticalSection(&waiters_cs_);
-}
-
-
-void MonitorData::SignalAndRemoveAllWaiters() {
-  EnterCriticalSection(&waiters_cs_);
-  // Extract list to signal.
-  MonitorWaitData* current = waiters_head_;
-  // Clear list.
-  waiters_head_ = waiters_tail_ = NULL;
-  // Iterate and signal all events.
-  while (current != NULL) {
-    // Copy next.
-    MonitorWaitData* next = current->next_;
-    // Clear next.
-    current->next_ = NULL;
-    // Signal event.
-    BOOL result = SetEvent(current->event_);
-    if (result == 0) {
-      FATAL1("Failed to set event for NotifyAll %d", GetLastError());
-    }
-    current = next;
-  }
-  LeaveCriticalSection(&waiters_cs_);
-}
-
-
-MonitorWaitData* MonitorData::GetMonitorWaitDataForThread() {
-  // Ensure that the thread local key for monitor wait data objects is
-  // initialized.
-  ASSERT(MonitorWaitData::monitor_wait_data_key_ !=
-         Thread::kUnsetThreadLocalKey);
-
-  // Get the MonitorWaitData object containing the event for this
-  // thread from thread local storage. Create it if it does not exist.
-  uword raw_wait_data =
-    Thread::GetThreadLocal(MonitorWaitData::monitor_wait_data_key_);
-  MonitorWaitData* wait_data = NULL;
-  if (raw_wait_data == 0) {
-    HANDLE event = CreateEvent(NULL, FALSE, FALSE, NULL);
-    wait_data = new MonitorWaitData(event);
-    Thread::SetThreadLocal(MonitorWaitData::monitor_wait_data_key_,
-                           reinterpret_cast<uword>(wait_data));
-  } else {
-    wait_data = reinterpret_cast<MonitorWaitData*>(raw_wait_data);
-    wait_data->next_ = NULL;
-  }
-  return wait_data;
-}
-
-
-Monitor::WaitResult Monitor::Wait(int64_t millis) {
-  Monitor::WaitResult retval = kNotified;
-
-  // Get the wait data object containing the event to wait for.
-  MonitorWaitData* wait_data = MonitorData::GetMonitorWaitDataForThread();
-
-  // Start waiting by adding the MonitorWaitData to the list of
-  // waiters.
-  data_.AddWaiter(wait_data);
-
-  // Leave the monitor critical section while waiting.
-  LeaveCriticalSection(&data_.cs_);
-
-  // Perform the actual wait on the event.
-  DWORD result = WAIT_FAILED;
-  if (millis == 0) {
-    // Wait forever for a Notify or a NotifyAll event.
-    result = WaitForSingleObject(wait_data->event_, INFINITE);
-    if (result == WAIT_FAILED) {
-      FATAL1("Monitor::Wait failed %d", GetLastError());
-    }
-  } else {
-    // Wait for the given period of time for a Notify or a NotifyAll
-    // event.
-    result = WaitForSingleObject(wait_data->event_, millis);
-    if (result == WAIT_FAILED) {
-      FATAL1("Monitor::Wait with timeout failed %d", GetLastError());
-    }
-    if (result == WAIT_TIMEOUT) {
-      // No longer waiting. Remove from the list of waiters.
-      data_.RemoveWaiter(wait_data);
-      retval = kTimedOut;
-    }
-  }
-
-  // Reacquire the monitor critical section before continuing.
-  EnterCriticalSection(&data_.cs_);
-
-  return retval;
-}
-
-
-Monitor::WaitResult Monitor::WaitMicros(int64_t micros) {
-  // TODO(johnmccutchan): Investigate sub-millisecond sleep times on Windows.
-  int64_t millis = micros / kMicrosecondsPerMillisecond;
-  if ((millis * kMicrosecondsPerMillisecond) < micros) {
-    // We've been asked to sleep for a fraction of a millisecond,
-    // this isn't supported on Windows. Bumps milliseconds up by one
-    // so that we never return too early. We likely return late though.
-    millis += 1;
-  }
-  return Wait(millis);
-}
-
-
-void Monitor::Notify() {
-  data_.SignalAndRemoveFirstWaiter();
-}
-
-
-void Monitor::NotifyAll() {
-  // If one of the objects in the list of waiters wakes because of a
-  // timeout before we signal it, that object will get an extra
-  // signal. This will be treated as a spurious wake-up and is OK
-  // since all uses of monitors should recheck the condition after a
-  // Wait.
-  data_.SignalAndRemoveAllWaiters();
-}
-
-}  // namespace dart
-
-#endif  // defined(TARGET_OS_WINDOWS)