Change the timeout handling in the standalone VM to use 64-bit integers

runtime/bin/eventhandler_win.cc

 // 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 "bin/eventhandler.h"
 
 #include <process.h>  // NOLINT
@@ skipping 888 matching lines @@
   timeout_port_ = 0;
   shutdown_ = false;
 }
 
 
 EventHandlerImplementation::~EventHandlerImplementation() {
   CloseHandle(completion_port_);
 }
 
 
-DWORD EventHandlerImplementation::GetTimeout() {
+int64_t EventHandlerImplementation::GetTimeout() {
   if (timeout_ == kInfinityTimeout) {
     return kInfinityTimeout;
   }
-  intptr_t millis = timeout_ - TimerUtils::GetCurrentTimeMilliseconds();
+  int64_t millis = timeout_ - TimerUtils::GetCurrentTimeMilliseconds();
   return (millis < 0) ? 0 : millis;
 }
 
 
 void EventHandlerImplementation::SendData(intptr_t id,
                                           Dart_Port dart_port,
                                           int64_t data) {
   InterruptMessage* msg = new InterruptMessage;
   msg->id = id;
   msg->dart_port = dart_port;
   msg->data = data;
   BOOL ok = PostQueuedCompletionStatus(
       completion_port_, 0, NULL, reinterpret_cast<OVERLAPPED*>(msg));
   if (!ok) {
     FATAL("PostQueuedCompletionStatus failed");
   }
 }
 
 
 void EventHandlerImplementation::EventHandlerEntry(uword args) {
   EventHandler* handler = reinterpret_cast<EventHandler*>(args);
   EventHandlerImplementation* handler_impl = &handler->delegate_;
   ASSERT(handler_impl != NULL);
   while (!handler_impl->shutdown_) {
     DWORD bytes;
     ULONG_PTR key;
     OVERLAPPED* overlapped;
-    intptr_t millis = handler_impl->GetTimeout();
+    int64_t millis = handler_impl->GetTimeout();
+    ASSERT(millis == kInfinityTimeout || millis >= 0);
+    if (millis > kMaxInt32) millis = kMaxInt32;
+    ASSERT(sizeof(int32_t) == sizeof(DWORD));
     BOOL ok = GetQueuedCompletionStatus(handler_impl->completion_port(),
                                         &bytes,
                                         &key,
                                         &overlapped,
-                                        millis);
+                                        static_cast<DWORD>(millis));
     if (!ok && overlapped == NULL) {
       if (GetLastError() == ERROR_ABANDONED_WAIT_0) {
         // The completion port should never be closed.
         Log::Print("Completion port closed\n");
         UNREACHABLE();
       } else {
         // Timeout is signalled by false result and NULL in overlapped.
         handler_impl->HandleTimeout();
       }
     } else if (!ok) {
@@ skipping 41 matching lines @@
 
 
 void EventHandlerImplementation::Shutdown() {
   SendData(kShutdownId, 0, 0);
 }
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_WINDOWS)