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

runtime/bin/eventhandler_fuchsia.cc

 // Copyright (c) 2016, 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_FUCHSIA)
 
 #include "bin/eventhandler.h"
@@ skipping 79 matching lines @@
   // real, and which are ignore-and-continue.
   read_events_enabled_ = true;
   if (!AsyncWaitLocked(MX_HANDLE_INVALID, POLLIN, wait_key_)) {
     LOG_ERR("IOHandle::AsyncWait failed for fd = %ld\n", fd_);
   }
 
   errno = err;
   return read_bytes;
 }
 
-
 intptr_t IOHandle::Write(const void* buffer, intptr_t num_bytes) {
   MutexLocker ml(mutex_);
   const ssize_t written_bytes =
       NO_RETRY_EXPECTED(write(fd_, buffer, num_bytes));
   const int err = errno;
   LOG_INFO("IOHandle::Write: fd = %ld. wrote %ld bytes\n", fd_, written_bytes);
 
   // Resubscribe to write events.
   write_events_enabled_ = true;
   if (!AsyncWaitLocked(MX_HANDLE_INVALID, POLLOUT, wait_key_)) {
     LOG_ERR("IOHandle::AsyncWait failed for fd = %ld\n", fd_);
   }
 
   errno = err;
   return written_bytes;
 }
 
-
 intptr_t IOHandle::Accept(struct sockaddr* addr, socklen_t* addrlen) {
   MutexLocker ml(mutex_);
   const intptr_t socket = NO_RETRY_EXPECTED(accept(fd_, addr, addrlen));
   const int err = errno;
   LOG_INFO("IOHandle::Accept: fd = %ld. socket = %ld\n", fd_, socket);
 
   // Re-subscribe to read events.
   read_events_enabled_ = true;
   if (!AsyncWaitLocked(MX_HANDLE_INVALID, POLLIN, wait_key_)) {
     LOG_ERR("IOHandle::AsyncWait failed for fd = %ld\n", fd_);
   }
 
   errno = err;
   return socket;
 }
 
-
 void IOHandle::Close() {
   MutexLocker ml(mutex_);
   VOID_NO_RETRY_EXPECTED(close(fd_));
 }
 
-
 uint32_t IOHandle::MaskToEpollEvents(intptr_t mask) {
   MutexLocker ml(mutex_);
   // Do not ask for POLLERR and POLLHUP explicitly as they are
   // triggered anyway.
   uint32_t events = POLLRDHUP;
   if (read_events_enabled_ && ((mask & (1 << kInEvent)) != 0)) {
     events |= POLLIN;
   }
   if (write_events_enabled_ && ((mask & (1 << kOutEvent)) != 0)) {
     events |= POLLOUT;
   }
   return events;
 }
 
-
 intptr_t IOHandle::EpollEventsToMask(intptr_t events) {
   if ((events & POLLERR) != 0) {
     // Return error only if POLLIN is present.
     return ((events & POLLIN) != 0) ? (1 << kErrorEvent) : 0;
   }
   intptr_t event_mask = 0;
   if ((events & POLLIN) != 0) {
     event_mask |= (1 << kInEvent);
   }
   if ((events & POLLOUT) != 0) {
     event_mask |= (1 << kOutEvent);
   }
   if ((events & (POLLHUP | POLLRDHUP)) != 0) {
     event_mask |= (1 << kCloseEvent);
   }
   return event_mask;
 }
 
-
 bool IOHandle::AsyncWaitLocked(mx_handle_t port,
                                uint32_t events,
                                uint64_t key) {
   LOG_INFO("IOHandle::AsyncWait: fd = %ld\n", fd_);
   // The call to __mxio_fd_to_io() in the DescriptorInfo constructor may have
   // returned NULL. If it did, propagate the problem up to Dart.
   if (mxio_ == NULL) {
     LOG_ERR("__mxio_fd_to_io(%d) returned NULL\n", fd_);
     return false;
   }
@@ skipping 19 matching lines @@
   mx_status_t status =
       mx_object_wait_async(handle_, port_, key, signals, MX_WAIT_ASYNC_ONCE);
   if (status != MX_OK) {
     LOG_ERR("mx_object_wait_async failed: %s\n", mx_status_get_string(status));
     return false;
   }
 
   return true;
 }
 
-
 bool IOHandle::AsyncWait(mx_handle_t port, uint32_t events, uint64_t key) {
   MutexLocker ml(mutex_);
   return AsyncWaitLocked(port, events, key);
 }
 
-
 void IOHandle::CancelWait(mx_handle_t port, uint64_t key) {
   MutexLocker ml(mutex_);
   LOG_INFO("IOHandle::CancelWait: fd = %ld\n", fd_);
   ASSERT(port != MX_HANDLE_INVALID);
   ASSERT(handle_ != MX_HANDLE_INVALID);
   mx_status_t status = mx_port_cancel(port, handle_, key);
   if ((status != MX_OK) && (status != MX_ERR_NOT_FOUND)) {
     LOG_ERR("mx_port_cancel failed: %s\n", mx_status_get_string(status));
   }
 }
 
-
 uint32_t IOHandle::WaitEnd(mx_signals_t observed) {
   MutexLocker ml(mutex_);
   uint32_t events = 0;
   __mxio_wait_end(mxio_, observed, &events);
   return events;
 }
 
-
 intptr_t IOHandle::ToggleEvents(intptr_t event_mask) {
   MutexLocker ml(mutex_);
   if (!write_events_enabled_) {
     LOG_INFO("IOHandle::ToggleEvents: fd = %ld de-asserting write\n", fd_);
     event_mask = event_mask & ~(1 << kOutEvent);
   }
   if ((event_mask & (1 << kOutEvent)) != 0) {
     LOG_INFO("IOHandle::ToggleEvents: fd = %ld asserting write and disabling\n",
              fd_);
     write_events_enabled_ = false;
   }
   if (!read_events_enabled_) {
     LOG_INFO("IOHandle::ToggleEvents: fd=%ld de-asserting read\n", fd_);
     event_mask = event_mask & ~(1 << kInEvent);
   }
   if ((event_mask & (1 << kInEvent)) != 0) {
     LOG_INFO("IOHandle::ToggleEvents: fd = %ld asserting read and disabling\n",
              fd_);
     read_events_enabled_ = false;
   }
   return event_mask;
 }
 
-
 void EventHandlerImplementation::AddToPort(mx_handle_t port_handle,
                                            DescriptorInfo* di) {
   const uint32_t events = di->io_handle()->MaskToEpollEvents(di->Mask());
   const uint64_t key = reinterpret_cast<uint64_t>(di);
   if (!di->io_handle()->AsyncWait(port_handle, events, key)) {
     di->NotifyAllDartPorts(1 << kCloseEvent);
   }
 }
 
-
 void EventHandlerImplementation::RemoveFromPort(mx_handle_t port_handle,
                                                 DescriptorInfo* di) {
   const uint64_t key = reinterpret_cast<uint64_t>(di);
   di->io_handle()->CancelWait(port_handle, key);
 }
 
-
 EventHandlerImplementation::EventHandlerImplementation()
     : socket_map_(&HashMap::SamePointerValue, 16) {
   shutdown_ = false;
   // Create the port.
   port_handle_ = MX_HANDLE_INVALID;
   mx_status_t status = mx_port_create(0, &port_handle_);
   if (status != MX_OK) {
     // This is a FATAL because the VM won't work at all if we can't create this
     // port.
     FATAL1("mx_port_create failed: %s\n", mx_status_get_string(status));
   }
   ASSERT(port_handle_ != MX_HANDLE_INVALID);
 }
 
-
 static void DeleteDescriptorInfo(void* info) {
   DescriptorInfo* di = reinterpret_cast<DescriptorInfo*>(info);
   LOG_INFO("Closed %ld\n", di->io_handle()->fd());
   di->Close();
   delete di;
 }
 
-
 EventHandlerImplementation::~EventHandlerImplementation() {
   socket_map_.Clear(DeleteDescriptorInfo);
   mx_handle_close(port_handle_);
   port_handle_ = MX_HANDLE_INVALID;
 }
 
-
 void EventHandlerImplementation::UpdatePort(intptr_t old_mask,
                                             DescriptorInfo* di) {
   const intptr_t new_mask = di->Mask();
   if ((old_mask != 0) && (new_mask == 0)) {
     RemoveFromPort(port_handle_, di);
   } else if ((old_mask == 0) && (new_mask != 0)) {
     AddToPort(port_handle_, di);
   } else if ((old_mask != 0) && (new_mask != 0)) {
     ASSERT(!di->IsListeningSocket());
     RemoveFromPort(port_handle_, di);
     AddToPort(port_handle_, di);
   }
 }
 
-
 DescriptorInfo* EventHandlerImplementation::GetDescriptorInfo(
     intptr_t fd,
     bool is_listening) {
   IOHandle* handle = reinterpret_cast<IOHandle*>(fd);
   ASSERT(handle->fd() >= 0);
   HashMap::Entry* entry =
       socket_map_.Lookup(GetHashmapKeyFromFd(handle->fd()),
                          GetHashmapHashFromFd(handle->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) {
   COMPILE_ASSERT(sizeof(InterruptMessage) <= sizeof(mx_packet_user_t));
   mx_port_packet_t pkt;
   InterruptMessage* msg = reinterpret_cast<InterruptMessage*>(&pkt.user);
   pkt.key = kInterruptPacketKey;
   msg->id = id;
   msg->dart_port = dart_port;
   msg->data = data;
   mx_status_t status =
       mx_port_queue(port_handle_, reinterpret_cast<void*>(&pkt), 0);
   if (status != MX_OK) {
     // This is a FATAL because the VM won't work at all if we can't send any
     // messages to the EventHandler thread.
     FATAL1("mx_port_queue failed: %s\n", mx_status_get_string(status));
   }
 }
 
-
 void EventHandlerImplementation::HandleInterrupt(InterruptMessage* msg) {
   if (msg->id == kTimerId) {
     LOG_INFO("HandleInterrupt read timer update\n");
     timeout_queue_.UpdateTimeout(msg->dart_port, msg->data);
     return;
   } else if (msg->id == kShutdownId) {
     LOG_INFO("HandleInterrupt read shutdown\n");
     shutdown_ = true;
     return;
   }
@@ skipping 71 matching lines @@
     const intptr_t old_mask = di->Mask();
     LOG_INFO("\t Set Event Mask: %ld: %lx %lx\n", fd, old_mask,
              msg->data & EVENT_MASK);
     di->SetPortAndMask(msg->dart_port, msg->data & EVENT_MASK);
     UpdatePort(old_mask, di);
   } else {
     UNREACHABLE();
   }
 }
 
-
 void EventHandlerImplementation::HandlePacket(mx_port_packet_t* pkt) {
   LOG_INFO("HandlePacket: Got event packet: key=%lx\n", pkt->key);
   LOG_INFO("HandlePacket: Got event packet: type=%lx\n", pkt->type);
   LOG_INFO("HandlePacket: Got event packet: status=%ld\n", pkt->status);
   if (pkt->type == MX_PKT_TYPE_USER) {
     ASSERT(pkt->key == kInterruptPacketKey);
     InterruptMessage* msg = reinterpret_cast<InterruptMessage*>(&pkt->user);
     HandleInterrupt(msg);
     return;
   }
@@ skipping 17 matching lines @@
       if (!success) {
         // This can happen if e.g. the isolate that owns the port has died
         // for some reason.
         LOG_INFO("Failed to post event to port %ld\n", port);
       }
     }
   }
   UpdatePort(old_mask, di);
 }
 
-
 int64_t EventHandlerImplementation::GetTimeout() const {
   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::Poll(uword args) {
   EventHandler* handler = reinterpret_cast<EventHandler*>(args);
   EventHandlerImplementation* handler_impl = &handler->delegate_;
   ASSERT(handler_impl != NULL);
 
   mx_port_packet_t pkt;
   while (!handler_impl->shutdown_) {
     int64_t millis = handler_impl->GetTimeout();
     ASSERT((millis == kInfinityTimeout) || (millis >= 0));
 
     LOG_INFO("mx_port_wait(millis = %ld)\n", millis);
     mx_status_t status = mx_port_wait(handler_impl->port_handle_,
                                       millis == kInfinityTimeout
                                           ? MX_TIME_INFINITE
                                           : mx_deadline_after(MX_MSEC(millis)),
                                       reinterpret_cast<void*>(&pkt), 0);
     if (status == MX_ERR_TIMED_OUT) {
       handler_impl->HandleTimeout();
     } else if (status != MX_OK) {
       FATAL1("mx_port_wait failed: %s\n", mx_status_get_string(status));
     } else {
       handler_impl->HandleTimeout();
       handler_impl->HandlePacket(&pkt);
     }
   }
   DEBUG_ASSERT(ReferenceCounted<Socket>::instances() == 0);
   handler->NotifyShutdownDone();
 }
 
-
 void EventHandlerImplementation::Start(EventHandler* handler) {
   int result = Thread::Start(&EventHandlerImplementation::Poll,
                              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_FUCHSIA)
 
 #endif  // !defined(DART_IO_DISABLED)