message_pump_android.cc revision eb525c5499e34cc9c4b825d6d9e75bb07cc06ace
15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2012 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 57d4cd473f85ac64c3747c96c277f9e506a0d2246Torne (Richard Coles)#include "base/message_loop/message_pump_android.h" 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include <jni.h> 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/android/jni_android.h" 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/android/scoped_java_ref.h" 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/lazy_instance.h" 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/logging.h" 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/run_loop.h" 14eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch#include "base/time/time.h" 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "jni/SystemMessageHandler_jni.h" 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)using base::android::ScopedJavaLocalRef; 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// ---------------------------------------------------------------------------- 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Native JNI methods called by Java. 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// ---------------------------------------------------------------------------- 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// This method can not move to anonymous namespace as it has been declared as 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 'static' in system_message_handler_jni.h. 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)static jboolean DoRunLoopOnce(JNIEnv* env, jobject obj, jint native_delegate) { 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::MessagePump::Delegate* delegate = 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) reinterpret_cast<base::MessagePump::Delegate*>(native_delegate); 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(delegate); 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // This is based on MessagePumpForUI::DoRunLoop() from desktop. 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Note however that our system queue is handled in the java side. 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // In desktop we inspect and process a single system message and then 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // we call DoWork() / DoDelayedWork(). 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // On Android, the java message queue may contain messages for other handlers 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // that will be processed before calling here again. 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool more_work_is_plausible = delegate->DoWork(); 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // This is the time when we need to do delayed work. 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::TimeTicks delayed_work_time; 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) more_work_is_plausible |= delegate->DoDelayedWork(&delayed_work_time); 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // This is a major difference between android and other platforms: since we 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // can't inspect it and process just one single message, instead we'll yeld 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // the callstack, and post a message to call us back soon. 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (more_work_is_plausible) 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) more_work_is_plausible = delegate->DoIdleWork(); 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!more_work_is_plausible && !delayed_work_time.is_null()) { 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // We only set the timer here as returning true would post a message. 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) jlong millis = 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) (delayed_work_time - base::TimeTicks::Now()).InMillisecondsRoundedUp(); 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Java_SystemMessageHandler_setDelayedTimer(env, obj, millis); 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return more_work_is_plausible; 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace base { 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)MessagePumpForUI::MessagePumpForUI() 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) : run_loop_(NULL) { 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)MessagePumpForUI::~MessagePumpForUI() { 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void MessagePumpForUI::Run(Delegate* delegate) { 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) NOTREACHED() << "UnitTests should rely on MessagePumpForUIStub in" 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) " test_stub_android.h"; 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void MessagePumpForUI::Start(Delegate* delegate) { 717d4cd473f85ac64c3747c96c277f9e506a0d2246Torne (Richard Coles) run_loop_ = new RunLoop(); 725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Since the RunLoop was just created above, BeforeRun should be guaranteed to 735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // return true (it only returns false if the RunLoop has been Quit already). 745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!run_loop_->BeforeRun()) 755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) NOTREACHED(); 765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 77eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch DCHECK(system_message_handler_obj_.is_null()); 785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) JNIEnv* env = base::android::AttachCurrentThread(); 805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(env); 815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 82eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch system_message_handler_obj_.Reset( 835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Java_SystemMessageHandler_create(env, reinterpret_cast<jint>(delegate))); 845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void MessagePumpForUI::Quit() { 87eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch if (!system_message_handler_obj_.is_null()) { 885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) JNIEnv* env = base::android::AttachCurrentThread(); 895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(env); 905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Java_SystemMessageHandler_removeTimer(env, 92eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch system_message_handler_obj_.obj()); 93eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch system_message_handler_obj_.Reset(); 945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (run_loop_) { 975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) run_loop_->AfterRun(); 985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) delete run_loop_; 995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) run_loop_ = NULL; 1005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void MessagePumpForUI::ScheduleWork() { 104eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch DCHECK(!system_message_handler_obj_.is_null()); 1055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) JNIEnv* env = base::android::AttachCurrentThread(); 1075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(env); 1085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Java_SystemMessageHandler_setTimer(env, 110eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch system_message_handler_obj_.obj()); 1115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void MessagePumpForUI::ScheduleDelayedWork(const TimeTicks& delayed_work_time) { 114eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch DCHECK(!system_message_handler_obj_.is_null()); 1155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) JNIEnv* env = base::android::AttachCurrentThread(); 1175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(env); 1185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) jlong millis = 1207d4cd473f85ac64c3747c96c277f9e506a0d2246Torne (Richard Coles) (delayed_work_time - TimeTicks::Now()).InMillisecondsRoundedUp(); 1215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Note that we're truncating to milliseconds as required by the java side, 1225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // even though delayed_work_time is microseconds resolution. 1235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Java_SystemMessageHandler_setDelayedTimer(env, 124eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch system_message_handler_obj_.obj(), millis); 1255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// static 1285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool MessagePumpForUI::RegisterBindings(JNIEnv* env) { 1295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return RegisterNativesImpl(env); 1305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace base 133