raw_channel.cc revision cedac228d2dd51db4b79ea1e72c7f249408ee061
1a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)// Copyright 2014 The Chromium Authors. All rights reserved. 2a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 3a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)// found in the LICENSE file. 4a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 5a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#include "mojo/system/raw_channel.h" 6a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 7a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#include <string.h> 8a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 9a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#include <algorithm> 10a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 11a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#include "base/bind.h" 12a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#include "base/location.h" 13a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#include "base/logging.h" 14a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#include "base/message_loop/message_loop.h" 15a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#include "base/stl_util.h" 16a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)#include "mojo/system/message_in_transit.h" 17010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles)#include "mojo/system/transport_data.h" 18a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 19a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)namespace mojo { 20a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)namespace system { 21a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 22a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)const size_t kReadSize = 4096; 23a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 240de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles)// RawChannel::ReadBuffer ------------------------------------------------------ 250de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) 260de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles)RawChannel::ReadBuffer::ReadBuffer() 270de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) : buffer_(kReadSize), 280de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) num_valid_bytes_(0) { 29a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)} 30a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 310de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles)RawChannel::ReadBuffer::~ReadBuffer() { 320de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles)} 33a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 34a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)void RawChannel::ReadBuffer::GetBuffer(char** addr, size_t* size) { 35a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) DCHECK_GE(buffer_.size(), num_valid_bytes_ + kReadSize); 36a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) *addr = &buffer_[0] + num_valid_bytes_; 37a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) *size = kReadSize; 38a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)} 39a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 400de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles)// RawChannel::WriteBuffer ----------------------------------------------------- 410de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) 420de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles)RawChannel::WriteBuffer::WriteBuffer(size_t serialized_platform_handle_size) 430de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) : serialized_platform_handle_size_(serialized_platform_handle_size), 440de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) platform_handles_offset_(0), 450de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) data_offset_(0) { 460de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles)} 47a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 48a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)RawChannel::WriteBuffer::~WriteBuffer() { 49a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) STLDeleteElements(&message_queue_); 50a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)} 51a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 520de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles)bool RawChannel::WriteBuffer::HavePlatformHandlesToSend() const { 530de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) if (message_queue_.empty()) 540de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) return false; 550de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) 560de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) const TransportData* transport_data = 570de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) message_queue_.front()->transport_data(); 580de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) if (!transport_data) 590de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) return false; 600de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) 61cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) const embedder::PlatformHandleVector* all_platform_handles = 620de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) transport_data->platform_handles(); 630de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) if (!all_platform_handles) { 640de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) DCHECK_EQ(platform_handles_offset_, 0u); 650de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) return false; 660de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) } 670de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) if (platform_handles_offset_ >= all_platform_handles->size()) { 680de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) DCHECK_EQ(platform_handles_offset_, all_platform_handles->size()); 690de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) return false; 700de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) } 710de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) 720de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) return true; 730de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles)} 740de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) 750de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles)void RawChannel::WriteBuffer::GetPlatformHandlesToSend( 760de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) size_t* num_platform_handles, 770de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) embedder::PlatformHandle** platform_handles, 780de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) void** serialization_data) { 790de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) DCHECK(HavePlatformHandlesToSend()); 800de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) 810de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) TransportData* transport_data = message_queue_.front()->transport_data(); 82cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) embedder::PlatformHandleVector* all_platform_handles = 830de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) transport_data->platform_handles(); 840de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) *num_platform_handles = 850de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) all_platform_handles->size() - platform_handles_offset_; 860de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) *platform_handles = &(*all_platform_handles)[platform_handles_offset_]; 870de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) size_t serialization_data_offset = 880de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) transport_data->platform_handle_table_offset(); 890de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) DCHECK_GT(serialization_data_offset, 0u); 900de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) serialization_data_offset += 910de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) platform_handles_offset_ * serialized_platform_handle_size_; 920de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) *serialization_data = 930de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) static_cast<char*>(transport_data->buffer()) + serialization_data_offset; 940de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles)} 950de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) 96a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)void RawChannel::WriteBuffer::GetBuffers(std::vector<Buffer>* buffers) const { 97a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) buffers->clear(); 98a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 99010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) if (message_queue_.empty()) 100a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) return; 101a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 102a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) MessageInTransit* message = message_queue_.front(); 1030de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) DCHECK_LT(data_offset_, message->total_size()); 1040de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) size_t bytes_to_write = message->total_size() - data_offset_; 105010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) 106010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) size_t transport_data_buffer_size = message->transport_data() ? 107010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) message->transport_data()->buffer_size() : 0; 108010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) 109010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) if (!transport_data_buffer_size) { 110a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // Only write from the main buffer. 1110de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) DCHECK_LT(data_offset_, message->main_buffer_size()); 112a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) DCHECK_LE(bytes_to_write, message->main_buffer_size()); 113a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) Buffer buffer = { 1140de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) static_cast<const char*>(message->main_buffer()) + data_offset_, 115a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) bytes_to_write}; 116a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) buffers->push_back(buffer); 117a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) return; 118a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) } 119a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 1200de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) if (data_offset_ >= message->main_buffer_size()) { 121010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) // Only write from the transport data buffer. 1220de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) DCHECK_LT(data_offset_ - message->main_buffer_size(), 123010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) transport_data_buffer_size); 124010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) DCHECK_LE(bytes_to_write, transport_data_buffer_size); 125a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) Buffer buffer = { 126010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) static_cast<const char*>(message->transport_data()->buffer()) + 1270de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) (data_offset_ - message->main_buffer_size()), 128a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) bytes_to_write}; 129a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) buffers->push_back(buffer); 130a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) return; 131a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) } 132a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 133cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // TODO(vtl): We could actually send out buffers from multiple messages, with 134cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // the "stopping" condition being reaching a message with platform handles 135cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // attached. 136cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 137a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // Write from both buffers. 1380de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) DCHECK_EQ(bytes_to_write, message->main_buffer_size() - data_offset_ + 139010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) transport_data_buffer_size); 140a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) Buffer buffer1 = { 1410de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) static_cast<const char*>(message->main_buffer()) + data_offset_, 1420de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) message->main_buffer_size() - data_offset_ 143010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) }; 144a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) buffers->push_back(buffer1); 145a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) Buffer buffer2 = { 146010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) static_cast<const char*>(message->transport_data()->buffer()), 147010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) transport_data_buffer_size 148010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) }; 149a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) buffers->push_back(buffer2); 150a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)} 151a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 1520de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles)// RawChannel ------------------------------------------------------------------ 1530de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) 154c5cede9ae108bb15f6b7a8aea21c7e1fefa2834cBen MurdochRawChannel::RawChannel() 1555c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu : message_loop_for_io_(NULL), 1565c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu delegate_(NULL), 157a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) read_stopped_(false), 158a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) write_stopped_(false), 159a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) weak_ptr_factory_(this) { 160a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)} 161a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 162a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)RawChannel::~RawChannel() { 163a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) DCHECK(!read_buffer_); 164a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) DCHECK(!write_buffer_); 165a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 166a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // No need to take the |write_lock_| here -- if there are still weak pointers 167a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // outstanding, then we're hosed anyway (since we wouldn't be able to 168a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // invalidate them cleanly, since we might not be on the I/O thread). 169a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) DCHECK(!weak_ptr_factory_.HasWeakPtrs()); 170a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)} 171a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 172c5cede9ae108bb15f6b7a8aea21c7e1fefa2834cBen Murdochbool RawChannel::Init(Delegate* delegate) { 173c5cede9ae108bb15f6b7a8aea21c7e1fefa2834cBen Murdoch DCHECK(delegate); 174c5cede9ae108bb15f6b7a8aea21c7e1fefa2834cBen Murdoch 175c5cede9ae108bb15f6b7a8aea21c7e1fefa2834cBen Murdoch DCHECK(!delegate_); 176c5cede9ae108bb15f6b7a8aea21c7e1fefa2834cBen Murdoch delegate_ = delegate; 177c5cede9ae108bb15f6b7a8aea21c7e1fefa2834cBen Murdoch 178c5cede9ae108bb15f6b7a8aea21c7e1fefa2834cBen Murdoch CHECK_EQ(base::MessageLoop::current()->type(), base::MessageLoop::TYPE_IO); 179c5cede9ae108bb15f6b7a8aea21c7e1fefa2834cBen Murdoch DCHECK(!message_loop_for_io_); 180c5cede9ae108bb15f6b7a8aea21c7e1fefa2834cBen Murdoch message_loop_for_io_ = 181c5cede9ae108bb15f6b7a8aea21c7e1fefa2834cBen Murdoch static_cast<base::MessageLoopForIO*>(base::MessageLoop::current()); 182a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 183a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // No need to take the lock. No one should be using us yet. 184a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) DCHECK(!read_buffer_); 185a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) read_buffer_.reset(new ReadBuffer); 186a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) DCHECK(!write_buffer_); 1870de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) write_buffer_.reset(new WriteBuffer(GetSerializedPlatformHandleSize())); 188a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 1895c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu if (!OnInit()) { 1905c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu delegate_ = NULL; 1915c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu message_loop_for_io_ = NULL; 1925c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu read_buffer_.reset(); 1935c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu write_buffer_.reset(); 194a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) return false; 1955c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu } 196a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 197cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) if (ScheduleRead() != IO_PENDING) { 198cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // This will notify the delegate about the read failure. Although we're on 199cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // the I/O thread, don't call it in the nested context. 200cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) message_loop_for_io_->PostTask( 201cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) FROM_HERE, 202cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) base::Bind(&RawChannel::OnReadCompleted, weak_ptr_factory_.GetWeakPtr(), 203cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) false, 0)); 204cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) } 205cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 206cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // ScheduleRead() failure is treated as a read failure (by notifying the 207cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // delegate), not as an init failure. 208cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) return true; 209a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)} 210a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 211a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)void RawChannel::Shutdown() { 212a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) DCHECK_EQ(base::MessageLoop::current(), message_loop_for_io_); 213a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 214a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) base::AutoLock locker(write_lock_); 215a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 216effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch LOG_IF(WARNING, !write_buffer_->message_queue_.empty()) 217effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch << "Shutting down RawChannel with write buffer nonempty"; 218effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch 2195c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu // Reset the delegate so that it won't receive further calls. 2205c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu delegate_ = NULL; 221a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) read_stopped_ = true; 222a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) write_stopped_ = true; 2235c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu weak_ptr_factory_.InvalidateWeakPtrs(); 224a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 225a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) OnShutdownNoLock(read_buffer_.Pass(), write_buffer_.Pass()); 226a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)} 227a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 228a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)// Reminder: This must be thread-safe. 229a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)bool RawChannel::WriteMessage(scoped_ptr<MessageInTransit> message) { 230c5cede9ae108bb15f6b7a8aea21c7e1fefa2834cBen Murdoch DCHECK(message); 231c5cede9ae108bb15f6b7a8aea21c7e1fefa2834cBen Murdoch 232a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) base::AutoLock locker(write_lock_); 233a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) if (write_stopped_) 234a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) return false; 235a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 236a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) if (!write_buffer_->message_queue_.empty()) { 237cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) EnqueueMessageNoLock(message.Pass()); 238a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) return true; 239a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) } 240a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 241cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) EnqueueMessageNoLock(message.Pass()); 2420de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) DCHECK_EQ(write_buffer_->data_offset_, 0u); 243a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 2440de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) size_t platform_handles_written = 0; 245a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) size_t bytes_written = 0; 2460de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) IOResult io_result = WriteNoLock(&platform_handles_written, &bytes_written); 247a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) if (io_result == IO_PENDING) 248a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) return true; 249a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 250a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) bool result = OnWriteCompletedNoLock(io_result == IO_SUCCEEDED, 2510de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) platform_handles_written, 252a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) bytes_written); 253a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) if (!result) { 254a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // Even if we're on the I/O thread, don't call |OnFatalError()| in the 255a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // nested context. 256a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) message_loop_for_io_->PostTask( 257a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) FROM_HERE, 258a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) base::Bind(&RawChannel::CallOnFatalError, 259a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) weak_ptr_factory_.GetWeakPtr(), 260a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) Delegate::FATAL_ERROR_FAILED_WRITE)); 261a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) } 262a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 263a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) return result; 264a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)} 265a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 266effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch// Reminder: This must be thread-safe. 267effb81e5f8246d0db0270817048dc992db66e9fbBen Murdochbool RawChannel::IsWriteBufferEmpty() { 268effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch base::AutoLock locker(write_lock_); 269effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch return write_buffer_->message_queue_.empty(); 270effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch} 271effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch 272a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)void RawChannel::OnReadCompleted(bool result, size_t bytes_read) { 273a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) DCHECK_EQ(base::MessageLoop::current(), message_loop_for_io_); 274a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 275a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) if (read_stopped_) { 276a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) NOTREACHED(); 277a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) return; 278a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) } 279a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 280a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) IOResult io_result = result ? IO_SUCCEEDED : IO_FAILED; 281a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 282a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // Keep reading data in a loop, and dispatch messages if enough data is 283a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // received. Exit the loop if any of the following happens: 284a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // - one or more messages were dispatched; 285a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // - the last read failed, was a partial read or would block; 286a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // - |Shutdown()| was called. 287a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) do { 288a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) if (io_result != IO_SUCCEEDED) { 289a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) read_stopped_ = true; 290a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) CallOnFatalError(Delegate::FATAL_ERROR_FAILED_READ); 291a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) return; 292a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) } 293a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 294a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) read_buffer_->num_valid_bytes_ += bytes_read; 295a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 296a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // Dispatch all the messages that we can. 297a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) bool did_dispatch_message = false; 298a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // Tracks the offset of the first undispatched message in |read_buffer_|. 299a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // Currently, we copy data to ensure that this is zero at the beginning. 300a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) size_t read_buffer_start = 0; 301a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) size_t remaining_bytes = read_buffer_->num_valid_bytes_; 302a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) size_t message_size; 303a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // Note that we rely on short-circuit evaluation here: 304a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // - |read_buffer_start| may be an invalid index into 305a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // |read_buffer_->buffer_| if |remaining_bytes| is zero. 306a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // - |message_size| is only valid if |GetNextMessageSize()| returns true. 307a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // TODO(vtl): Use |message_size| more intelligently (e.g., to request the 308a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // next read). 309a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // TODO(vtl): Validate that |message_size| is sane. 310a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) while (remaining_bytes > 0 && 311a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) MessageInTransit::GetNextMessageSize( 312a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) &read_buffer_->buffer_[read_buffer_start], remaining_bytes, 313a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) &message_size) && 314a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) remaining_bytes >= message_size) { 315a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) MessageInTransit::View 316a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) message_view(message_size, &read_buffer_->buffer_[read_buffer_start]); 317a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) DCHECK_EQ(message_view.total_size(), message_size); 318a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 319cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) const char* error_message = NULL; 320cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) if (!message_view.IsValid(GetSerializedPlatformHandleSize(), 321cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) &error_message)) { 322cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) DCHECK(error_message); 323cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) LOG(WARNING) << "Received invalid message: " << error_message; 324cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) read_stopped_ = true; 325cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) CallOnFatalError(Delegate::FATAL_ERROR_FAILED_READ); 326a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) return; 327a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) } 328cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 329cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) if (message_view.type() == MessageInTransit::kTypeRawChannel) { 330cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) if (!OnReadMessageForRawChannel(message_view)) { 331cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) read_stopped_ = true; 332cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) CallOnFatalError(Delegate::FATAL_ERROR_FAILED_READ); 333cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) return; 334cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) } 335cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) } else { 336cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) embedder::ScopedPlatformHandleVectorPtr platform_handles; 337cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) if (message_view.transport_data_buffer()) { 338cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) size_t num_platform_handles; 339cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) const void* platform_handle_table; 340cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) TransportData::GetPlatformHandleTable( 341cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) message_view.transport_data_buffer(), 342cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) &num_platform_handles, 343cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) &platform_handle_table); 344cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 345cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) if (num_platform_handles > 0) { 346cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) platform_handles = 347cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) GetReadPlatformHandles(num_platform_handles, 348cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) platform_handle_table).Pass(); 349cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) if (!platform_handles) { 350cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) LOG(WARNING) << "Invalid number of platform handles received"; 351cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) read_stopped_ = true; 352cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) CallOnFatalError(Delegate::FATAL_ERROR_FAILED_READ); 353cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) return; 354cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) } 355cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) } 356cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) } 357cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 358cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // TODO(vtl): In the case that we aren't expecting any platform handles, 359cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // for the POSIX implementation, we should confirm that none are stored. 360cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 361cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // Dispatch the message. 362cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) DCHECK(delegate_); 363cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) delegate_->OnReadMessage(message_view, platform_handles.Pass()); 364cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) if (read_stopped_) { 365cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // |Shutdown()| was called in |OnReadMessage()|. 366cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // TODO(vtl): Add test for this case. 367cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) return; 368cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) } 369cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) } 370cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 371a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) did_dispatch_message = true; 372a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 373a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // Update our state. 374a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) read_buffer_start += message_size; 375a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) remaining_bytes -= message_size; 376a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) } 377a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 378a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) if (read_buffer_start > 0) { 379a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // Move data back to start. 380a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) read_buffer_->num_valid_bytes_ = remaining_bytes; 381a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) if (read_buffer_->num_valid_bytes_ > 0) { 382a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) memmove(&read_buffer_->buffer_[0], 383a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) &read_buffer_->buffer_[read_buffer_start], remaining_bytes); 384a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) } 385a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) read_buffer_start = 0; 386a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) } 387a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 388a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) if (read_buffer_->buffer_.size() - read_buffer_->num_valid_bytes_ < 389a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) kReadSize) { 390a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // Use power-of-2 buffer sizes. 391a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // TODO(vtl): Make sure the buffer doesn't get too large (and enforce the 392a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // maximum message size to whatever extent necessary). 393a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // TODO(vtl): We may often be able to peek at the header and get the real 394a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // required extra space (which may be much bigger than |kReadSize|). 395a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) size_t new_size = std::max(read_buffer_->buffer_.size(), kReadSize); 396a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) while (new_size < read_buffer_->num_valid_bytes_ + kReadSize) 397a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) new_size *= 2; 398a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 399a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // TODO(vtl): It's suboptimal to zero out the fresh memory. 400a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) read_buffer_->buffer_.resize(new_size, 0); 401a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) } 402a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 403a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // (1) If we dispatched any messages, stop reading for now (and let the 404a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // message loop do its thing for another round). 405a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // TODO(vtl): Is this the behavior we want? (Alternatives: i. Dispatch only 406a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // a single message. Risks: slower, more complex if we want to avoid lots of 407a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // copying. ii. Keep reading until there's no more data and dispatch all the 408a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // messages we can. Risks: starvation of other users of the message loop.) 409a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // (2) If we didn't max out |kReadSize|, stop reading for now. 410a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) bool schedule_for_later = did_dispatch_message || bytes_read < kReadSize; 411a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) bytes_read = 0; 412a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) io_result = schedule_for_later ? ScheduleRead() : Read(&bytes_read); 413a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) } while (io_result != IO_PENDING); 414a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)} 415a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 4160de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles)void RawChannel::OnWriteCompleted(bool result, 4170de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) size_t platform_handles_written, 4180de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) size_t bytes_written) { 419a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) DCHECK_EQ(base::MessageLoop::current(), message_loop_for_io_); 420a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 421a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) bool did_fail = false; 422a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) { 423a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) base::AutoLock locker(write_lock_); 424a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) DCHECK_EQ(write_stopped_, write_buffer_->message_queue_.empty()); 425a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 426a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) if (write_stopped_) { 427a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) NOTREACHED(); 428a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) return; 429a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) } 430a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 4310de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) did_fail = !OnWriteCompletedNoLock(result, 4320de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) platform_handles_written, 4330de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) bytes_written); 434a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) } 435a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 436a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) if (did_fail) 437a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) CallOnFatalError(Delegate::FATAL_ERROR_FAILED_WRITE); 438a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)} 439a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 440cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)void RawChannel::EnqueueMessageNoLock(scoped_ptr<MessageInTransit> message) { 441cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) write_lock_.AssertAcquired(); 442cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) write_buffer_->message_queue_.push_back(message.release()); 443cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)} 444cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 445cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)bool RawChannel::OnReadMessageForRawChannel( 446cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) const MessageInTransit::View& message_view) { 447cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) // No non-implementation specific |RawChannel| control messages. 448cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) LOG(ERROR) << "Invalid control message (subtype " << message_view.subtype() 449cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) << ")"; 450cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) return false; 451cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles)} 452cedac228d2dd51db4b79ea1e72c7f249408ee061Torne (Richard Coles) 453a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)void RawChannel::CallOnFatalError(Delegate::FatalError fatal_error) { 454a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) DCHECK_EQ(base::MessageLoop::current(), message_loop_for_io_); 455a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // TODO(vtl): Add a "write_lock_.AssertNotAcquired()"? 4565c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu if (delegate_) 4575c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu delegate_->OnFatalError(fatal_error); 458a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)} 459a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 4600de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles)bool RawChannel::OnWriteCompletedNoLock(bool result, 4610de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) size_t platform_handles_written, 4620de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) size_t bytes_written) { 463a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) write_lock_.AssertAcquired(); 464a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 465a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) DCHECK(!write_stopped_); 466a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) DCHECK(!write_buffer_->message_queue_.empty()); 467a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 468a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) if (result) { 4690de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) write_buffer_->platform_handles_offset_ += platform_handles_written; 4700de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) write_buffer_->data_offset_ += bytes_written; 471010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) 472010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) MessageInTransit* message = write_buffer_->message_queue_.front(); 4730de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) if (write_buffer_->data_offset_ >= message->total_size()) { 474a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // Complete write. 4750de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) DCHECK_EQ(write_buffer_->data_offset_, message->total_size()); 476a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) write_buffer_->message_queue_.pop_front(); 477010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) delete message; 4780de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) write_buffer_->platform_handles_offset_ = 0; 4790de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) write_buffer_->data_offset_ = 0; 480a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 481010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) if (write_buffer_->message_queue_.empty()) 482010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) return true; 483010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) } 484a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 485a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) // Schedule the next write. 486010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) IOResult io_result = ScheduleWriteNoLock(); 487010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) if (io_result == IO_PENDING) 488a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) return true; 489010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) DCHECK_EQ(io_result, IO_FAILED); 490a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) } 491a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 492a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) write_stopped_ = true; 493a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) STLDeleteElements(&write_buffer_->message_queue_); 4940de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) write_buffer_->platform_handles_offset_ = 0; 4950de6073388f4e2780db8536178b129cd8f6ab386Torne (Richard Coles) write_buffer_->data_offset_ = 0; 496a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) return false; 497a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)} 498a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) 499a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)} // namespace system 500a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles)} // namespace mojo 501