ajohnsen@google.com
9a71498127
We now limit the number of active events per fd to 8. BUG= R=whesse@google.com Review URL: https://codereview.chromium.org//198743002 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@33649 260f80e4-7a28-3924-810f-c04153c831b5
136 lines
3.0 KiB
C++
136 lines
3.0 KiB
C++
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#ifndef BIN_EVENTHANDLER_H_
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#define BIN_EVENTHANDLER_H_
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#include "bin/builtin.h"
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#include "bin/isolate_data.h"
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namespace dart {
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namespace bin {
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// Flags used to provide information and actions to the eventhandler
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// when sending a message about a file descriptor. These flags should
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// be kept in sync with the constants in socket_impl.dart. For more
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// information see the comments in socket_impl.dart
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enum MessageFlags {
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kInEvent = 0,
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kOutEvent = 1,
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kErrorEvent = 2,
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kCloseEvent = 3,
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kDestroyedEvent = 4,
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kCloseCommand = 8,
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kShutdownReadCommand = 9,
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kShutdownWriteCommand = 10,
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kReturnTokenCommand = 11,
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kListeningSocket = 16,
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kPipe = 17,
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};
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class TimeoutQueue {
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private:
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class Timeout {
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public:
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Timeout(Dart_Port port, int64_t timeout, Timeout* next)
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: port_(port), timeout_(timeout), next_(next) {}
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Dart_Port port() const { return port_; }
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int64_t timeout() const { return timeout_; }
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void set_timeout(int64_t timeout) {
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ASSERT(timeout >= 0);
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timeout_ = timeout;
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}
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Timeout* next() const { return next_; }
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void set_next(Timeout* next) {
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next_ = next;
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}
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private:
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Dart_Port port_;
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int64_t timeout_;
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Timeout* next_;
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};
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public:
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TimeoutQueue() : next_timeout_(NULL), timeouts_(NULL) {}
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~TimeoutQueue() {
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while (HasTimeout()) RemoveCurrent();
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}
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bool HasTimeout() const { return next_timeout_ != NULL; }
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int64_t CurrentTimeout() const {
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ASSERT(next_timeout_ != NULL);
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return next_timeout_->timeout();
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}
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Dart_Port CurrentPort() const {
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ASSERT(next_timeout_ != NULL);
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return next_timeout_->port();
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}
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void RemoveCurrent() {
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UpdateTimeout(CurrentPort(), -1);
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}
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void UpdateTimeout(Dart_Port port, int64_t timeout);
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private:
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Timeout* next_timeout_;
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Timeout* timeouts_;
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};
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} // namespace bin
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} // namespace dart
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// The event handler delegation class is OS specific.
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#if defined(TARGET_OS_ANDROID)
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#include "bin/eventhandler_android.h"
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#elif defined(TARGET_OS_LINUX)
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#include "bin/eventhandler_linux.h"
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#elif defined(TARGET_OS_MACOS)
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#include "bin/eventhandler_macos.h"
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#elif defined(TARGET_OS_WINDOWS)
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#include "bin/eventhandler_win.h"
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#else
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#error Unknown target os.
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#endif
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namespace dart {
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namespace bin {
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class EventHandler {
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public:
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void SendData(intptr_t id, Dart_Port dart_port, int64_t data) {
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delegate_.SendData(id, dart_port, data);
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}
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/**
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* Start the event-handler.
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*/
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static void Start();
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/**
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* Stop the event-handler. It's expected that there will be no further calls
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* to SendData after a call to Stop.
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*/
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static void Stop();
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static EventHandlerImplementation* delegate();
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private:
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friend class EventHandlerImplementation;
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EventHandlerImplementation delegate_;
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};
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} // namespace bin
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} // namespace dart
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#endif // BIN_EVENTHANDLER_H_
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