VM: Re-format to use at most one newline between functions

runtime/bin/eventhandler_macos.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.
 
 #if !defined(DART_IO_DISABLED)
 
 #include "platform/globals.h"
 #if defined(HOST_OS_MACOS)
 
 #include "bin/eventhandler.h"
@@ skipping 17 matching lines @@
 #include "platform/hashmap.h"
 #include "platform/utils.h"
 
 namespace dart {
 namespace bin {
 
 bool DescriptorInfo::HasReadEvent() {
   return (Mask() & (1 << kInEvent)) != 0;
 }
 
-
 bool DescriptorInfo::HasWriteEvent() {
   return (Mask() & (1 << kOutEvent)) != 0;
 }
 
-
 // Unregister the file descriptor for a SocketData structure with kqueue.
 static void RemoveFromKqueue(intptr_t kqueue_fd_, DescriptorInfo* di) {
   if (!di->tracked_by_kqueue()) {
     return;
   }
   static const intptr_t kMaxChanges = 2;
   struct kevent events[kMaxChanges];
   EV_SET(events, di->fd(), EVFILT_READ, EV_DELETE, 0, 0, NULL);
   VOID_NO_RETRY_EXPECTED(kevent(kqueue_fd_, events, 1, NULL, 0, NULL));
   EV_SET(events, di->fd(), EVFILT_WRITE, EV_DELETE, 0, 0, NULL);
   VOID_NO_RETRY_EXPECTED(kevent(kqueue_fd_, events, 1, NULL, 0, NULL));
   di->set_tracked_by_kqueue(false);
 }
 
-
 // Update the kqueue registration for SocketData structure to reflect
 // the events currently of interest.
 static void AddToKqueue(intptr_t kqueue_fd_, DescriptorInfo* di) {
   ASSERT(!di->tracked_by_kqueue());
   static const intptr_t kMaxChanges = 2;
   intptr_t changes = 0;
   struct kevent events[kMaxChanges];
   int flags = EV_ADD;
   if (!di->IsListeningSocket()) {
     flags |= EV_CLEAR;
@@ skipping 21 matching lines @@
     // kQueue does not accept the file descriptor. It could be due to
     // already closed file descriptor, or unuspported devices, such
     // as /dev/null. In such case, mark the file descriptor as closed,
     // so dart will handle it accordingly.
     di->NotifyAllDartPorts(1 << kCloseEvent);
   } else {
     di->set_tracked_by_kqueue(true);
   }
 }
 
-
 EventHandlerImplementation::EventHandlerImplementation()
     : socket_map_(&HashMap::SamePointerValue, 16) {
   intptr_t result;
   result = NO_RETRY_EXPECTED(pipe(interrupt_fds_));
   if (result != 0) {
     FATAL("Pipe creation failed");
   }
   if (!FDUtils::SetNonBlocking(interrupt_fds_[0])) {
     FATAL("Failed to set pipe fd non-blocking\n");
   }
@@ skipping 17 matching lines @@
   EV_SET(&event, interrupt_fds_[0], EVFILT_READ, EV_ADD, 0, 0, NULL);
   int status = NO_RETRY_EXPECTED(kevent(kqueue_fd_, &event, 1, NULL, 0, NULL));
   if (status == -1) {
     const int kBufferSize = 1024;
     char error_message[kBufferSize];
     Utils::StrError(errno, error_message, kBufferSize);
     FATAL1("Failed adding interrupt fd to kqueue: %s\n", error_message);
   }
 }
 
-
 static void DeleteDescriptorInfo(void* info) {
   DescriptorInfo* di = reinterpret_cast<DescriptorInfo*>(info);
   di->Close();
   delete di;
 }
 
-
 EventHandlerImplementation::~EventHandlerImplementation() {
   socket_map_.Clear(DeleteDescriptorInfo);
   VOID_TEMP_FAILURE_RETRY(close(kqueue_fd_));
   VOID_TEMP_FAILURE_RETRY(close(interrupt_fds_[0]));
   VOID_TEMP_FAILURE_RETRY(close(interrupt_fds_[1]));
 }
 
-
 void EventHandlerImplementation::UpdateKQueueInstance(intptr_t old_mask,
                                                       DescriptorInfo* di) {
   intptr_t new_mask = di->Mask();
   if (old_mask != 0 && new_mask == 0) {
     RemoveFromKqueue(kqueue_fd_, di);
   } else if ((old_mask == 0) && (new_mask != 0)) {
     AddToKqueue(kqueue_fd_, di);
   } else if ((old_mask != 0) && (new_mask != 0) && (old_mask != new_mask)) {
     ASSERT(!di->IsListeningSocket());
     RemoveFromKqueue(kqueue_fd_, di);
     AddToKqueue(kqueue_fd_, di);
   }
 }
 
-
 DescriptorInfo* EventHandlerImplementation::GetDescriptorInfo(
     intptr_t fd,
     bool is_listening) {
   ASSERT(fd >= 0);
   HashMap::Entry* entry = socket_map_.Lookup(GetHashmapKeyFromFd(fd),
                                              GetHashmapHashFromFd(fd), true);
   ASSERT(entry != NULL);
   DescriptorInfo* di = reinterpret_cast<DescriptorInfo*>(entry->value);
   if (di == NULL) {
     // If there is no data in the hash map for this file descriptor a
     // new DescriptorInfo for the file descriptor is inserted.
     if (is_listening) {
       di = new DescriptorInfoMultiple(fd);
     } else {
       di = new DescriptorInfoSingle(fd);
     }
     entry->value = di;
   }
   ASSERT(fd == di->fd());
   return di;
 }
 
-
 void EventHandlerImplementation::WakeupHandler(intptr_t id,
                                                Dart_Port dart_port,
                                                int64_t data) {
   InterruptMessage msg;
   msg.id = id;
   msg.dart_port = dart_port;
   msg.data = data;
   // WriteToBlocking will write up to 512 bytes atomically, and since our msg
   // is smaller than 512, we don't need a thread lock.
   ASSERT(kInterruptMessageSize < PIPE_BUF);
   intptr_t result =
       FDUtils::WriteToBlocking(interrupt_fds_[1], &msg, kInterruptMessageSize);
   if (result != kInterruptMessageSize) {
     if (result == -1) {
       perror("Interrupt message failure:");
     }
     FATAL1("Interrupt message failure. Wrote %" Pd " bytes.", result);
   }
 }
 
-
 void EventHandlerImplementation::HandleInterruptFd() {
   const intptr_t MAX_MESSAGES = kInterruptMessageSize;
   InterruptMessage msg[MAX_MESSAGES];
   ssize_t bytes = TEMP_FAILURE_RETRY(
       read(interrupt_fds_[0], msg, MAX_MESSAGES * kInterruptMessageSize));
   for (ssize_t i = 0; i < bytes / kInterruptMessageSize; i++) {
     if (msg[i].id == kTimerId) {
       timeout_queue_.UpdateTimeout(msg[i].dart_port, msg[i].data);
     } else if (msg[i].id == kShutdownId) {
       shutdown_ = true;
@@ skipping 62 matching lines @@
         intptr_t old_mask = di->Mask();
         di->SetPortAndMask(msg[i].dart_port, msg[i].data & EVENT_MASK);
         UpdateKQueueInstance(old_mask, di);
       } else {
         UNREACHABLE();
       }
     }
   }
 }
 
-
 #ifdef DEBUG_KQUEUE
 static void PrintEventMask(intptr_t fd, struct kevent* event) {
   Log::Print("%d ", static_cast<int>(fd));
 
   Log::Print("filter=0x%x:", event->filter);
   if (event->filter == EVFILT_READ) {
     Log::Print("EVFILT_READ ");
   }
   if (event->filter == EVFILT_WRITE) {
     Log::Print("EVFILT_WRITE ");
@@ skipping 16 matching lines @@
     Log::Print("EV_DELETE ");
   }
 
   Log::Print("- fflags: %d ", event->fflags);
   Log::Print("- data: %ld ", event->data);
   Log::Print("(available %d) ", static_cast<int>(FDUtils::AvailableBytes(fd)));
   Log::Print("\n");
 }
 #endif
 
-
 intptr_t EventHandlerImplementation::GetEvents(struct kevent* event,
                                                DescriptorInfo* di) {
 #ifdef DEBUG_KQUEUE
   PrintEventMask(di->fd(), event);
 #endif
   intptr_t event_mask = 0;
   if (di->IsListeningSocket()) {
     // On a listening socket the READ event means that there are
     // connections ready to be accepted.
     if (event->filter == EVFILT_READ) {
@@ skipping 29 matching lines @@
         }
       }
     } else {
       UNREACHABLE();
     }
   }
 
   return event_mask;
 }
 
-
 void EventHandlerImplementation::HandleEvents(struct kevent* events, int size) {
   bool interrupt_seen = false;
   for (int i = 0; i < size; i++) {
     // If flag EV_ERROR is set it indicates an error in kevent processing.
     if ((events[i].flags & EV_ERROR) != 0) {
       const int kBufferSize = 1024;
       char error_message[kBufferSize];
       Utils::StrError(events[i].data, error_message, kBufferSize);
       FATAL1("kevent failed %s\n", error_message);
     }
@@ skipping 14 matching lines @@
       }
     }
   }
   if (interrupt_seen) {
     // Handle after socket events, so we avoid closing a socket before we handle
     // the current events.
     HandleInterruptFd();
   }
 }
 
-
 int64_t EventHandlerImplementation::GetTimeout() {
   if (!timeout_queue_.HasTimeout()) {
     return kInfinityTimeout;
   }
   int64_t millis =
       timeout_queue_.CurrentTimeout() - TimerUtils::GetCurrentMonotonicMillis();
   return (millis < 0) ? 0 : millis;
 }
 
-
 void EventHandlerImplementation::HandleTimeout() {
   if (timeout_queue_.HasTimeout()) {
     int64_t millis = timeout_queue_.CurrentTimeout() -
                      TimerUtils::GetCurrentMonotonicMillis();
     if (millis <= 0) {
       DartUtils::PostNull(timeout_queue_.CurrentPort());
       timeout_queue_.RemoveCurrent();
     }
   }
 }
 
-
 void EventHandlerImplementation::EventHandlerEntry(uword args) {
   static const intptr_t kMaxEvents = 16;
   struct kevent events[kMaxEvents];
   EventHandler* handler = reinterpret_cast<EventHandler*>(args);
   EventHandlerImplementation* handler_impl = &handler->delegate_;
   ASSERT(handler_impl != NULL);
 
   while (!handler_impl->shutdown_) {
     int64_t millis = handler_impl->GetTimeout();
     ASSERT(millis == kInfinityTimeout || millis >= 0);
@@ skipping 22 matching lines @@
       FATAL1("kevent failed %s\n", error_message);
     } else {
       handler_impl->HandleTimeout();
       handler_impl->HandleEvents(events, result);
     }
   }
   DEBUG_ASSERT(ReferenceCounted<Socket>::instances() == 0);
   handler->NotifyShutdownDone();
 }
 
-
 void EventHandlerImplementation::Start(EventHandler* handler) {
   int result = Thread::Start(&EventHandlerImplementation::EventHandlerEntry,
                              reinterpret_cast<uword>(handler));
   if (result != 0) {
     FATAL1("Failed to start event handler thread %d", result);
   }
 }
 
-
 void EventHandlerImplementation::Shutdown() {
   SendData(kShutdownId, 0, 0);
 }
 
-
 void EventHandlerImplementation::SendData(intptr_t id,
                                           Dart_Port dart_port,
                                           int64_t data) {
   WakeupHandler(id, dart_port, data);
 }
 
-
 void* EventHandlerImplementation::GetHashmapKeyFromFd(intptr_t fd) {
   // The hashmap does not support keys with value 0.
   return reinterpret_cast<void*>(fd + 1);
 }
 
-
 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(HOST_OS_MACOS)
 
 #endif  // !defined(DART_IO_DISABLED)