Move message_pump to base/message_loop.

base/message_pump_android.cc

-// Copyright (c) 2012 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 <jni.h>
-
-#include "base/android/jni_android.h"
-#include "base/android/scoped_java_ref.h"
-#include "base/lazy_instance.h"
-#include "base/logging.h"
-#include "base/run_loop.h"
-#include "base/time.h"
-#include "jni/SystemMessageHandler_jni.h"
-
-using base::android::ScopedJavaLocalRef;
-
-namespace {
-
-base::LazyInstance<base::android::ScopedJavaGlobalRef<jobject> >
-    g_system_message_handler_obj = LAZY_INSTANCE_INITIALIZER;
-
-}  // namespace
-
-// ----------------------------------------------------------------------------
-// Native JNI methods called by Java.
-// ----------------------------------------------------------------------------
-// This method can not move to anonymous namespace as it has been declared as
-// 'static' in system_message_handler_jni.h.
-static jboolean DoRunLoopOnce(JNIEnv* env, jobject obj, jint native_delegate) {
-  base::MessagePump::Delegate* delegate =
-      reinterpret_cast<base::MessagePump::Delegate*>(native_delegate);
-  DCHECK(delegate);
-  // This is based on MessagePumpForUI::DoRunLoop() from desktop.
-  // Note however that our system queue is handled in the java side.
-  // In desktop we inspect and process a single system message and then
-  // we call DoWork() / DoDelayedWork().
-  // On Android, the java message queue may contain messages for other handlers
-  // that will be processed before calling here again.
-  bool more_work_is_plausible = delegate->DoWork();
-
-  // This is the time when we need to do delayed work.
-  base::TimeTicks delayed_work_time;
-  more_work_is_plausible |= delegate->DoDelayedWork(&delayed_work_time);
-
-  // This is a major difference between android and other platforms: since we
-  // can't inspect it and process just one single message, instead we'll yeld
-  // the callstack, and post a message to call us back soon.
-  if (more_work_is_plausible)
-    return true;
-
-  more_work_is_plausible = delegate->DoIdleWork();
-  if (!more_work_is_plausible && !delayed_work_time.is_null()) {
-    // We only set the timer here as returning true would post a message.
-    jlong millis =
-        (delayed_work_time - base::TimeTicks::Now()).InMillisecondsRoundedUp();
-    Java_SystemMessageHandler_setDelayedTimer(env, obj, millis);
-  }
-  return more_work_is_plausible;
-}
-
-namespace base {
-
-MessagePumpForUI::MessagePumpForUI()
-    : run_loop_(NULL) {
-}
-
-MessagePumpForUI::~MessagePumpForUI() {
-}
-
-void MessagePumpForUI::Run(Delegate* delegate) {
-  NOTREACHED() << "UnitTests should rely on MessagePumpForUIStub in"
-      " test_stub_android.h";
-}
-
-void MessagePumpForUI::Start(Delegate* delegate) {
-  run_loop_ = new base::RunLoop();
-  // Since the RunLoop was just created above, BeforeRun should be guaranteed to
-  // return true (it only returns false if the RunLoop has been Quit already).
-  if (!run_loop_->BeforeRun())
-    NOTREACHED();
-
-  DCHECK(g_system_message_handler_obj.Get().is_null());
-
-  JNIEnv* env = base::android::AttachCurrentThread();
-  DCHECK(env);
-
-  g_system_message_handler_obj.Get().Reset(
-      Java_SystemMessageHandler_create(env, reinterpret_cast<jint>(delegate)));
-}
-
-void MessagePumpForUI::Quit() {
-  if (!g_system_message_handler_obj.Get().is_null()) {
-    JNIEnv* env = base::android::AttachCurrentThread();
-    DCHECK(env);
-
-    Java_SystemMessageHandler_removeTimer(env,
-        g_system_message_handler_obj.Get().obj());
-    g_system_message_handler_obj.Get().Reset();
-  }
-
-  if (run_loop_) {
-    run_loop_->AfterRun();
-    delete run_loop_;
-    run_loop_ = NULL;
-  }
-}
-
-void MessagePumpForUI::ScheduleWork() {
-  DCHECK(!g_system_message_handler_obj.Get().is_null());
-
-  JNIEnv* env = base::android::AttachCurrentThread();
-  DCHECK(env);
-
-  Java_SystemMessageHandler_setTimer(env,
-      g_system_message_handler_obj.Get().obj());
-}
-
-void MessagePumpForUI::ScheduleDelayedWork(const TimeTicks& delayed_work_time) {
-  DCHECK(!g_system_message_handler_obj.Get().is_null());
-
-  JNIEnv* env = base::android::AttachCurrentThread();
-  DCHECK(env);
-
-  jlong millis =
-      (delayed_work_time - base::TimeTicks::Now()).InMillisecondsRoundedUp();
-  // Note that we're truncating to milliseconds as required by the java side,
-  // even though delayed_work_time is microseconds resolution.
-  Java_SystemMessageHandler_setDelayedTimer(env,
-      g_system_message_handler_obj.Get().obj(), millis);
-}
-
-// static
-bool MessagePumpForUI::RegisterBindings(JNIEnv* env) {
-  return RegisterNativesImpl(env);
-}
-
-}  // namespace base