eventhandler_linux.h

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// 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.
 
#ifndef RUNTIME_BIN_EVENTHANDLER_LINUX_H_
#define RUNTIME_BIN_EVENTHANDLER_LINUX_H_
 
#if !defined(RUNTIME_BIN_EVENTHANDLER_H_)
#error Do not include eventhandler_linux.h directly; use eventhandler.h instead.
#endif
 
#include <errno.h>
#include <sys/epoll.h>
#include <sys/socket.h>
#include <unistd.h>
 
#include "platform/hashmap.h"
#include "platform/signal_blocker.h"
 
namespace dart {
namespace bin {
 
class DescriptorInfo : public DescriptorInfoBase {
 public:
  explicit DescriptorInfo(intptr_t fd) : DescriptorInfoBase(fd) {}
 
  virtual ~DescriptorInfo() {}
 
  intptr_t GetPollEvents();
 
  virtual void Close() {
    close(fd_);
    fd_ = -1;
  }
 
 private:
  DISALLOW_COPY_AND_ASSIGN(DescriptorInfo);
};
 
class DescriptorInfoSingle : public DescriptorInfoSingleMixin<DescriptorInfo> {
 public:
  explicit DescriptorInfoSingle(intptr_t fd)
      : DescriptorInfoSingleMixin(fd, false) {}
  virtual ~DescriptorInfoSingle() {}
 
 private:
  DISALLOW_COPY_AND_ASSIGN(DescriptorInfoSingle);
};
 
class DescriptorInfoMultiple
    : public DescriptorInfoMultipleMixin<DescriptorInfo> {
 public:
  explicit DescriptorInfoMultiple(intptr_t fd)
      : DescriptorInfoMultipleMixin(fd, false) {}
  virtual ~DescriptorInfoMultiple() {}
 
 private:
  DISALLOW_COPY_AND_ASSIGN(DescriptorInfoMultiple);
};
 
class EventHandlerImplementation {
 public:
  EventHandlerImplementation();
  ~EventHandlerImplementation();
 
  void UpdateEpollInstance(intptr_t old_mask, DescriptorInfo* di);
 
  // Gets the socket data structure for a given file
  // descriptor. Creates a new one if one is not found.
  DescriptorInfo* GetDescriptorInfo(intptr_t fd, bool is_listening);
  void SendData(intptr_t id, Dart_Port dart_port, int64_t data);
  void Start(EventHandler* handler);
  void Shutdown();
 
 private:
  void HandleEvents(struct epoll_event* events, int size);
  static void Poll(uword args);
  void WakeupHandler(intptr_t id, Dart_Port dart_port, int64_t data);
  void HandleInterruptFd();
  void UpdateTimerFd();
  void SetPort(intptr_t fd, Dart_Port dart_port, intptr_t mask);
  intptr_t GetPollEvents(intptr_t events, DescriptorInfo* di);
  static void* GetHashmapKeyFromFd(intptr_t fd);
  static uint32_t GetHashmapHashFromFd(intptr_t fd);
 
  SimpleHashMap socket_map_;
  TimeoutQueue timeout_queue_;
  bool shutdown_;
  int interrupt_fds_[2];
  int epoll_fd_;
  int timer_fd_;
 
  DISALLOW_COPY_AND_ASSIGN(EventHandlerImplementation);
};
 
}  // namespace bin
}  // namespace dart
 
#endif  // RUNTIME_BIN_EVENTHANDLER_LINUX_H_