rsleevi@chromium.org | 997c1d4 | 2012-04-28 11:12:00 +0900 | [diff] [blame] | 1 | // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
jabdelmalek@google.com | eb92165 | 2010-04-07 05:33:36 +0900 | [diff] [blame] | 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #include "ipc/ipc_sync_message_filter.h" |
| 6 | |
jhawkins@chromium.org | 9827bd1 | 2011-11-13 06:16:41 +0900 | [diff] [blame] | 7 | #include "base/bind.h" |
ajwong@chromium.org | 8e2e300 | 2011-09-22 03:05:41 +0900 | [diff] [blame] | 8 | #include "base/location.h" |
jabdelmalek@google.com | eb92165 | 2010-04-07 05:33:36 +0900 | [diff] [blame] | 9 | #include "base/logging.h" |
brettw@chromium.org | ab2678f | 2013-06-11 05:56:28 +0900 | [diff] [blame] | 10 | #include "base/message_loop/message_loop_proxy.h" |
brettw@chromium.org | 5238c7d | 2011-01-02 15:05:39 +0900 | [diff] [blame] | 11 | #include "base/synchronization/waitable_event.h" |
dmichael@chromium.org | c0c370e | 2014-04-25 09:07:30 +0900 | [diff] [blame] | 12 | #include "ipc/ipc_channel.h" |
jabdelmalek@google.com | eb92165 | 2010-04-07 05:33:36 +0900 | [diff] [blame] | 13 | #include "ipc/ipc_sync_message.h" |
| 14 | |
sievers@chromium.org | 7ac134c | 2011-09-16 18:38:38 +0900 | [diff] [blame] | 15 | using base::MessageLoopProxy; |
| 16 | |
jabdelmalek@google.com | eb92165 | 2010-04-07 05:33:36 +0900 | [diff] [blame] | 17 | namespace IPC { |
| 18 | |
| 19 | SyncMessageFilter::SyncMessageFilter(base::WaitableEvent* shutdown_event) |
morrita@chromium.org | 631fb8e | 2014-06-13 15:07:14 +0900 | [diff] [blame] | 20 | : sender_(NULL), |
sievers@chromium.org | 7ac134c | 2011-09-16 18:38:38 +0900 | [diff] [blame] | 21 | listener_loop_(MessageLoopProxy::current()), |
jabdelmalek@google.com | eb92165 | 2010-04-07 05:33:36 +0900 | [diff] [blame] | 22 | shutdown_event_(shutdown_event) { |
| 23 | } |
| 24 | |
jabdelmalek@google.com | eb92165 | 2010-04-07 05:33:36 +0900 | [diff] [blame] | 25 | bool SyncMessageFilter::Send(Message* message) { |
| 26 | { |
brettw@chromium.org | abe477a | 2011-01-21 13:55:52 +0900 | [diff] [blame] | 27 | base::AutoLock auto_lock(lock_); |
rsleevi@chromium.org | 23b6623 | 2013-06-01 13:11:27 +0900 | [diff] [blame] | 28 | if (!io_loop_.get()) { |
jabdelmalek@google.com | eb92165 | 2010-04-07 05:33:36 +0900 | [diff] [blame] | 29 | delete message; |
| 30 | return false; |
| 31 | } |
| 32 | } |
| 33 | |
| 34 | if (!message->is_sync()) { |
| 35 | io_loop_->PostTask( |
jhawkins@chromium.org | 9827bd1 | 2011-11-13 06:16:41 +0900 | [diff] [blame] | 36 | FROM_HERE, base::Bind(&SyncMessageFilter::SendOnIOThread, this, message)); |
jabdelmalek@google.com | eb92165 | 2010-04-07 05:33:36 +0900 | [diff] [blame] | 37 | return true; |
| 38 | } |
| 39 | |
| 40 | base::WaitableEvent done_event(true, false); |
| 41 | PendingSyncMsg pending_message( |
| 42 | SyncMessage::GetMessageId(*message), |
viettrungluu@chromium.org | c6d1797 | 2013-01-05 05:09:15 +0900 | [diff] [blame] | 43 | static_cast<SyncMessage*>(message)->GetReplyDeserializer(), |
jabdelmalek@google.com | eb92165 | 2010-04-07 05:33:36 +0900 | [diff] [blame] | 44 | &done_event); |
| 45 | |
| 46 | { |
brettw@chromium.org | abe477a | 2011-01-21 13:55:52 +0900 | [diff] [blame] | 47 | base::AutoLock auto_lock(lock_); |
jabdelmalek@google.com | eb92165 | 2010-04-07 05:33:36 +0900 | [diff] [blame] | 48 | // Can't use this class on the main thread or else it can lead to deadlocks. |
| 49 | // Also by definition, can't use this on IO thread since we're blocking it. |
rsleevi@chromium.org | 64293f1 | 2013-06-12 01:46:36 +0900 | [diff] [blame] | 50 | DCHECK(MessageLoopProxy::current().get() != listener_loop_.get()); |
| 51 | DCHECK(MessageLoopProxy::current().get() != io_loop_.get()); |
dumi@chromium.org | 229db06 | 2010-05-29 16:00:47 +0900 | [diff] [blame] | 52 | pending_sync_messages_.insert(&pending_message); |
jabdelmalek@google.com | eb92165 | 2010-04-07 05:33:36 +0900 | [diff] [blame] | 53 | } |
| 54 | |
| 55 | io_loop_->PostTask( |
jhawkins@chromium.org | 9827bd1 | 2011-11-13 06:16:41 +0900 | [diff] [blame] | 56 | FROM_HERE, base::Bind(&SyncMessageFilter::SendOnIOThread, this, message)); |
jabdelmalek@google.com | eb92165 | 2010-04-07 05:33:36 +0900 | [diff] [blame] | 57 | |
| 58 | base::WaitableEvent* events[2] = { shutdown_event_, &done_event }; |
| 59 | base::WaitableEvent::WaitMany(events, 2); |
| 60 | |
| 61 | { |
brettw@chromium.org | abe477a | 2011-01-21 13:55:52 +0900 | [diff] [blame] | 62 | base::AutoLock auto_lock(lock_); |
jabdelmalek@google.com | eb92165 | 2010-04-07 05:33:36 +0900 | [diff] [blame] | 63 | delete pending_message.deserializer; |
dumi@chromium.org | 229db06 | 2010-05-29 16:00:47 +0900 | [diff] [blame] | 64 | pending_sync_messages_.erase(&pending_message); |
jabdelmalek@google.com | eb92165 | 2010-04-07 05:33:36 +0900 | [diff] [blame] | 65 | } |
| 66 | |
| 67 | return pending_message.send_result; |
| 68 | } |
| 69 | |
morrita@chromium.org | 631fb8e | 2014-06-13 15:07:14 +0900 | [diff] [blame] | 70 | void SyncMessageFilter::OnFilterAdded(Sender* sender) { |
| 71 | sender_ = sender; |
brettw@chromium.org | abe477a | 2011-01-21 13:55:52 +0900 | [diff] [blame] | 72 | base::AutoLock auto_lock(lock_); |
sievers@chromium.org | 7ac134c | 2011-09-16 18:38:38 +0900 | [diff] [blame] | 73 | io_loop_ = MessageLoopProxy::current(); |
jabdelmalek@google.com | eb92165 | 2010-04-07 05:33:36 +0900 | [diff] [blame] | 74 | } |
| 75 | |
| 76 | void SyncMessageFilter::OnChannelError() { |
morrita@chromium.org | 631fb8e | 2014-06-13 15:07:14 +0900 | [diff] [blame] | 77 | sender_ = NULL; |
jabdelmalek@google.com | eb92165 | 2010-04-07 05:33:36 +0900 | [diff] [blame] | 78 | SignalAllEvents(); |
| 79 | } |
| 80 | |
| 81 | void SyncMessageFilter::OnChannelClosing() { |
morrita@chromium.org | 631fb8e | 2014-06-13 15:07:14 +0900 | [diff] [blame] | 82 | sender_ = NULL; |
jabdelmalek@google.com | eb92165 | 2010-04-07 05:33:36 +0900 | [diff] [blame] | 83 | SignalAllEvents(); |
| 84 | } |
| 85 | |
| 86 | bool SyncMessageFilter::OnMessageReceived(const Message& message) { |
brettw@chromium.org | abe477a | 2011-01-21 13:55:52 +0900 | [diff] [blame] | 87 | base::AutoLock auto_lock(lock_); |
jabdelmalek@google.com | eb92165 | 2010-04-07 05:33:36 +0900 | [diff] [blame] | 88 | for (PendingSyncMessages::iterator iter = pending_sync_messages_.begin(); |
| 89 | iter != pending_sync_messages_.end(); ++iter) { |
dumi@chromium.org | 229db06 | 2010-05-29 16:00:47 +0900 | [diff] [blame] | 90 | if (SyncMessage::IsMessageReplyTo(message, (*iter)->id)) { |
jabdelmalek@google.com | eb92165 | 2010-04-07 05:33:36 +0900 | [diff] [blame] | 91 | if (!message.is_reply_error()) { |
dumi@chromium.org | 229db06 | 2010-05-29 16:00:47 +0900 | [diff] [blame] | 92 | (*iter)->send_result = |
| 93 | (*iter)->deserializer->SerializeOutputParameters(message); |
jabdelmalek@google.com | eb92165 | 2010-04-07 05:33:36 +0900 | [diff] [blame] | 94 | } |
dumi@chromium.org | 229db06 | 2010-05-29 16:00:47 +0900 | [diff] [blame] | 95 | (*iter)->done_event->Signal(); |
jabdelmalek@google.com | eb92165 | 2010-04-07 05:33:36 +0900 | [diff] [blame] | 96 | return true; |
| 97 | } |
| 98 | } |
| 99 | |
| 100 | return false; |
| 101 | } |
| 102 | |
rsleevi@chromium.org | 997c1d4 | 2012-04-28 11:12:00 +0900 | [diff] [blame] | 103 | SyncMessageFilter::~SyncMessageFilter() { |
| 104 | } |
| 105 | |
| 106 | void SyncMessageFilter::SendOnIOThread(Message* message) { |
morrita@chromium.org | 631fb8e | 2014-06-13 15:07:14 +0900 | [diff] [blame] | 107 | if (sender_) { |
| 108 | sender_->Send(message); |
rsleevi@chromium.org | 997c1d4 | 2012-04-28 11:12:00 +0900 | [diff] [blame] | 109 | return; |
| 110 | } |
| 111 | |
| 112 | if (message->is_sync()) { |
| 113 | // We don't know which thread sent it, but it doesn't matter, just signal |
| 114 | // them all. |
| 115 | SignalAllEvents(); |
| 116 | } |
| 117 | |
| 118 | delete message; |
| 119 | } |
| 120 | |
| 121 | void SyncMessageFilter::SignalAllEvents() { |
| 122 | base::AutoLock auto_lock(lock_); |
| 123 | for (PendingSyncMessages::iterator iter = pending_sync_messages_.begin(); |
| 124 | iter != pending_sync_messages_.end(); ++iter) { |
| 125 | (*iter)->done_event->Signal(); |
| 126 | } |
| 127 | } |
| 128 | |
jabdelmalek@google.com | eb92165 | 2010-04-07 05:33:36 +0900 | [diff] [blame] | 129 | } // namespace IPC |