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| 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "ipc/ipc_sync_message_filter.h" | 5 #include "ipc/ipc_sync_message_filter.h" |
| 6 | 6 |
| 7 #include "base/bind.h" |
| 7 #include "base/location.h" | 8 #include "base/location.h" |
| 8 #include "base/logging.h" | 9 #include "base/logging.h" |
| 9 #include "base/message_loop_proxy.h" | 10 #include "base/message_loop_proxy.h" |
| 10 #include "base/synchronization/waitable_event.h" | 11 #include "base/synchronization/waitable_event.h" |
| 11 #include "ipc/ipc_sync_message.h" | 12 #include "ipc/ipc_sync_message.h" |
| 12 | 13 |
| 13 using base::MessageLoopProxy; | 14 using base::MessageLoopProxy; |
| 14 | 15 |
| 15 namespace IPC { | 16 namespace IPC { |
| 16 | 17 |
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| 27 { | 28 { |
| 28 base::AutoLock auto_lock(lock_); | 29 base::AutoLock auto_lock(lock_); |
| 29 if (!io_loop_) { | 30 if (!io_loop_) { |
| 30 delete message; | 31 delete message; |
| 31 return false; | 32 return false; |
| 32 } | 33 } |
| 33 } | 34 } |
| 34 | 35 |
| 35 if (!message->is_sync()) { | 36 if (!message->is_sync()) { |
| 36 io_loop_->PostTask( | 37 io_loop_->PostTask( |
| 37 FROM_HERE, | 38 FROM_HERE, base::Bind(&SyncMessageFilter::SendOnIOThread, this, message)); |
| 38 NewRunnableMethod(this, &SyncMessageFilter::SendOnIOThread, message)); | |
| 39 return true; | 39 return true; |
| 40 } | 40 } |
| 41 | 41 |
| 42 base::WaitableEvent done_event(true, false); | 42 base::WaitableEvent done_event(true, false); |
| 43 PendingSyncMsg pending_message( | 43 PendingSyncMsg pending_message( |
| 44 SyncMessage::GetMessageId(*message), | 44 SyncMessage::GetMessageId(*message), |
| 45 reinterpret_cast<SyncMessage*>(message)->GetReplyDeserializer(), | 45 reinterpret_cast<SyncMessage*>(message)->GetReplyDeserializer(), |
| 46 &done_event); | 46 &done_event); |
| 47 | 47 |
| 48 { | 48 { |
| 49 base::AutoLock auto_lock(lock_); | 49 base::AutoLock auto_lock(lock_); |
| 50 // Can't use this class on the main thread or else it can lead to deadlocks. | 50 // Can't use this class on the main thread or else it can lead to deadlocks. |
| 51 // Also by definition, can't use this on IO thread since we're blocking it. | 51 // Also by definition, can't use this on IO thread since we're blocking it. |
| 52 DCHECK(MessageLoopProxy::current() != listener_loop_); | 52 DCHECK(MessageLoopProxy::current() != listener_loop_); |
| 53 DCHECK(MessageLoopProxy::current() != io_loop_); | 53 DCHECK(MessageLoopProxy::current() != io_loop_); |
| 54 pending_sync_messages_.insert(&pending_message); | 54 pending_sync_messages_.insert(&pending_message); |
| 55 } | 55 } |
| 56 | 56 |
| 57 io_loop_->PostTask( | 57 io_loop_->PostTask( |
| 58 FROM_HERE, | 58 FROM_HERE, base::Bind(&SyncMessageFilter::SendOnIOThread, this, message)); |
| 59 NewRunnableMethod(this, &SyncMessageFilter::SendOnIOThread, message)); | |
| 60 | 59 |
| 61 base::WaitableEvent* events[2] = { shutdown_event_, &done_event }; | 60 base::WaitableEvent* events[2] = { shutdown_event_, &done_event }; |
| 62 base::WaitableEvent::WaitMany(events, 2); | 61 base::WaitableEvent::WaitMany(events, 2); |
| 63 | 62 |
| 64 { | 63 { |
| 65 base::AutoLock auto_lock(lock_); | 64 base::AutoLock auto_lock(lock_); |
| 66 delete pending_message.deserializer; | 65 delete pending_message.deserializer; |
| 67 pending_sync_messages_.erase(&pending_message); | 66 pending_sync_messages_.erase(&pending_message); |
| 68 } | 67 } |
| 69 | 68 |
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| 120 } | 119 } |
| 121 (*iter)->done_event->Signal(); | 120 (*iter)->done_event->Signal(); |
| 122 return true; | 121 return true; |
| 123 } | 122 } |
| 124 } | 123 } |
| 125 | 124 |
| 126 return false; | 125 return false; |
| 127 } | 126 } |
| 128 | 127 |
| 129 } // namespace IPC | 128 } // namespace IPC |
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