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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /ipc/chromium/src/base/message_pump_android.cc
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+// Copyright (c) 2010 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 "base/message_pump_android.h"
+
+#include <fcntl.h>
+#include <math.h>
+
+#include "base/eintr_wrapper.h"
+#include "base/logging.h"
+#include "base/platform_thread.h"
+
+namespace mozilla {
+bool ProcessNextEvent();
+void NotifyEvent();
+}
+
+namespace base {
+
+MessagePumpForUI::MessagePumpForUI()
+ : state_(NULL)
+ , pump(*this)
+{
+}
+
+MessagePumpForUI::~MessagePumpForUI() {
+}
+
+MessagePumpAndroid::MessagePumpAndroid(MessagePumpForUI &aPump)
+ : pump(aPump)
+{
+}
+
+MessagePumpAndroid::~MessagePumpAndroid()
+{
+}
+
+void MessagePumpForUI::Run(Delegate* delegate) {
+ RunState state;
+ state.delegate = delegate;
+ state.should_quit = false;
+ state.run_depth = state_ ? state_->run_depth + 1 : 1;
+ // We really only do a single task for each iteration of the loop. If we
+ // have done something, assume there is likely something more to do. This
+ // will mean that we don't block on the message pump until there was nothing
+ // more to do. We also set this to true to make sure not to block on the
+ // first iteration of the loop, so RunAllPending() works correctly.
+ state.more_work_is_plausible = true;
+
+ RunState* previous_state = state_;
+ state_ = &state;
+
+ // We run our own loop instead of using g_main_loop_quit in one of the
+ // callbacks. This is so we only quit our own loops, and we don't quit
+ // nested loops run by others. TODO(deanm): Is this what we want?
+
+ while (!state_->should_quit) {
+ mozilla::ProcessNextEvent();
+ if (work_scheduled) {
+ work_scheduled = false;
+ HandleDispatch();
+ }
+ }
+
+ state_ = previous_state;
+}
+
+void MessagePumpForUI::HandleDispatch() {
+ // We should only ever have a single message on the wakeup pipe, since we
+ // are only signaled when the queue went from empty to non-empty. The qApp
+ // poll will tell us whether there was data, so this read shouldn't block.
+ if (state_->should_quit)
+ return;
+
+ state_->more_work_is_plausible = false;
+
+ if (state_->delegate->DoWork())
+ state_->more_work_is_plausible = true;
+
+ if (state_->should_quit)
+ return;
+
+ if (state_->delegate->DoDelayedWork(&delayed_work_time_))
+ state_->more_work_is_plausible = true;
+ if (state_->should_quit)
+ return;
+
+ // Don't do idle work if we think there are more important things
+ // that we could be doing.
+ if (state_->more_work_is_plausible)
+ return;
+
+ if (state_->delegate->DoIdleWork())
+ state_->more_work_is_plausible = true;
+ if (state_->should_quit)
+ return;
+}
+
+void MessagePumpForUI::Quit() {
+ if (state_) {
+ state_->should_quit = true;
+ } else {
+ NOTREACHED() << "Quit called outside Run!";
+ }
+}
+
+void MessagePumpForUI::ScheduleWork() {
+ // This can be called on any thread, so we don't want to touch any state
+ // variables as we would then need locks all over. This ensures that if
+ // we are sleeping in a poll that we will wake up.
+ work_scheduled = true;
+ mozilla::NotifyEvent();
+}
+
+void MessagePumpForUI::ScheduleDelayedWork(const TimeTicks& delayed_work_time) {
+ // We need to wake up the loop in case the poll timeout needs to be
+ // adjusted. This will cause us to try to do work, but that's ok.
+ delayed_work_time_ = delayed_work_time;
+ ScheduleWork();
+}
+
+} // namespace base