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

runtime/bin/eventhandler_linux.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_LINUX)
 
 #include "bin/eventhandler.h"
 
 #include <errno.h>  // NOLINT
@@ skipping 337 matching lines @@
         DartUtils::PostInt32(port, event_mask);
       }
     }
   }
   // Handle after socket events, so we avoid closing a socket before we handle
   // the current events.
   HandleInterruptFd();
 }
 
 
-intptr_t 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::HandleTimeout() {
   if (timeout_ != kInfinityTimeout) {
-    intptr_t millis = timeout_ - TimerUtils::GetCurrentTimeMilliseconds();
+    int64_t millis = timeout_ - TimerUtils::GetCurrentTimeMilliseconds();
     if (millis <= 0) {
       DartUtils::PostNull(timeout_port_);
       timeout_ = kInfinityTimeout;
       timeout_port_ = 0;
     }
   }
 }
 
 
 void EventHandlerImplementation::Poll(uword args) {
   static const intptr_t kMaxEvents = 16;
   struct epoll_event events[kMaxEvents];
   EventHandler* handler = reinterpret_cast<EventHandler*>(args);
   EventHandlerImplementation* handler_impl = &handler->delegate_;
   ASSERT(handler_impl != NULL);
   while (!handler_impl->shutdown_) {
-    intptr_t millis = handler_impl->GetTimeout();
+    int64_t millis = handler_impl->GetTimeout();
+    ASSERT(millis == kInfinityTimeout || millis >= 0);
+    if (millis > kMaxInt32) millis = kMaxInt32;
     intptr_t result = TEMP_FAILURE_RETRY(epoll_wait(handler_impl->epoll_fd_,
                                                     events,
                                                     kMaxEvents,
                                                     millis));
     ASSERT(EAGAIN == EWOULDBLOCK);
     if (result == -1) {
       if (errno != EWOULDBLOCK) {
         perror("Poll failed");
       }
     } else {
@@ skipping 34 matching lines @@
 
 uint32_t EventHandlerImplementation::GetHashmapHashFromFd(intptr_t fd) {
   // The hashmap does not support keys with value 0.
   return dart::Utils::WordHash(fd + 1);
 }
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_LINUX)