run_loop.cc revision 0529e5d033099cbfc42635f6f6183833b09dff6e
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) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/run_loop.h" 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/bind.h" 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 90529e5d033099cbfc42635f6f6183833b09dff6eBen Murdoch#if defined(OS_WIN) 105d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)#include "base/message_loop/message_pump_dispatcher.h" 115d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)#endif 125d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace base { 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)RunLoop::RunLoop() 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) : loop_(MessageLoop::current()), 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) previous_run_loop_(NULL), 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) run_depth_(0), 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) run_called_(false), 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) quit_called_(false), 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) running_(false), 224e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) quit_when_idle_received_(false), 234e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) weak_factory_(this) { 24c5cede9ae108bb15f6b7a8aea21c7e1fefa2834cBen Murdoch#if defined(OS_WIN) 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) dispatcher_ = NULL; 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 29c5cede9ae108bb15f6b7a8aea21c7e1fefa2834cBen Murdoch#if defined(OS_WIN) 305d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)RunLoop::RunLoop(MessagePumpDispatcher* dispatcher) 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) : loop_(MessageLoop::current()), 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) previous_run_loop_(NULL), 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) dispatcher_(dispatcher), 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) run_depth_(0), 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) run_called_(false), 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) quit_called_(false), 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) running_(false), 384e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) quit_when_idle_received_(false), 394e180b6a0b4720a9b8e9e959a882386f690f08ffTorne (Richard Coles) weak_factory_(this) { 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)RunLoop::~RunLoop() { 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void RunLoop::Run() { 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!BeforeRun()) 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) loop_->RunHandler(); 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) AfterRun(); 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void RunLoop::RunUntilIdle() { 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) quit_when_idle_received_ = true; 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Run(); 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void RunLoop::Quit() { 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) quit_called_ = true; 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (running_ && loop_->run_loop_ == this) { 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // This is the inner-most RunLoop, so quit now. 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) loop_->QuitNow(); 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)base::Closure RunLoop::QuitClosure() { 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return base::Bind(&RunLoop::Quit, weak_factory_.GetWeakPtr()); 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool RunLoop::BeforeRun() { 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(!run_called_); 725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) run_called_ = true; 735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Allow Quit to be called before Run. 755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (quit_called_) 765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Push RunLoop stack: 795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) previous_run_loop_ = loop_->run_loop_; 805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) run_depth_ = previous_run_loop_? previous_run_loop_->run_depth_ + 1 : 1; 815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) loop_->run_loop_ = this; 825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) running_ = true; 845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void RunLoop::AfterRun() { 885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) running_ = false; 895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Pop RunLoop stack: 915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) loop_->run_loop_ = previous_run_loop_; 925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Execute deferred QuitNow, if any: 945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (previous_run_loop_ && previous_run_loop_->quit_called_) 955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) loop_->QuitNow(); 965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace base 99