Adding a Wayland basic toolkit

ui/wayland/wayland_message_pump.cc

+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "ui/wayland/wayland_message_pump.h"
+
+#include <wayland-client.h>
+
+#include "ui/wayland/wayland_display.h"
+
+WaylandMessagePump::WaylandMessagePump(WaylandDisplay* display)
+    : display_(display) {
+  static GSourceFuncs source_handlers = {
+    WaylandMessagePump::SourcePrepare,
+    WaylandMessagePump::SourceCheck,
+    WaylandMessagePump::SourceDispatch,
+    NULL
+  };
+
+  source_ = static_cast<WorkSource*>(
+      g_source_new(&source_handlers, sizeof(WorkSource)));
+  source_->pump = this;
+  pfd_.fd = wl_display_get_fd(display_->GetNativeDisplay(),
+                              WaylandMessagePump::SourceUpdate,
+                              source_);
+  pfd_.events = G_IO_IN | G_IO_ERR;
+  g_source_add_poll(source_, &pfd_);
+  g_source_attach(source_, NULL);
+}
+
+WaylandMessagePump::~WaylandMessagePump() {
+  g_source_destroy(source_);
+  g_source_unref(source_);
+}
+
+int WaylandMessagePump::HandlePrepare() {
+  while (mask_ & WL_DISPLAY_WRITABLE) {
+    wl_display_iterate(display_->GetNativeDisplay(), WL_DISPLAY_WRITABLE);
+  }
+  return -1;
+}
+
+bool WaylandMessagePump::HandleCheck() {
+  return pfd_.revents;
+}
+
+void WaylandMessagePump::HandleDispatch() {
+  wl_display_iterate(display_->GetNativeDisplay(), WL_DISPLAY_READABLE);
+}
+
+// static
+gboolean WaylandMessagePump::SourcePrepare(GSource* source, gint* timeout) {
+  *timeout = static_cast<WorkSource*>(source)->pump->HandlePrepare();
+  return FALSE;
+}
+
+// static
+gboolean WaylandMessagePump::SourceCheck(GSource* source) {
+  return static_cast<WorkSource*>(source)->pump->HandleCheck();
+}
+
+// static
+gboolean WaylandMessagePump::SourceDispatch(GSource* source,
+                                            GSourceFunc callback,
+                                            gpointer data) {
+  static_cast<WorkSource*>(source)->pump->HandleDispatch();
+  return TRUE;
+}
+
+// static
+int WaylandMessagePump::SourceUpdate(uint32_t mask, void* data) {
+  static_cast<WorkSource*>(data)->pump->mask_ = mask;
+  return 0;
+}