Index: storage/browser/blob/blob_async_builder_host.cc |
diff --git a/storage/browser/blob/blob_async_builder_host.cc b/storage/browser/blob/blob_async_builder_host.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..1cd2e7779e1a071d7d77c4d82d28ad2eea00dc45 |
--- /dev/null |
+++ b/storage/browser/blob/blob_async_builder_host.cc |
@@ -0,0 +1,273 @@ |
+// Copyright 2015 The Chromium Authors. All rights reserved. |
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+ |
+#include "storage/browser/blob/blob_async_builder_host.h" |
+ |
+#include <utility> |
+ |
+#include "base/memory/shared_memory.h" |
+ |
+namespace storage { |
+ |
+using MemoryItemRequest = BlobAsyncTransportStrategy::RendererMemoryItemRequest; |
+ |
+BlobAsyncBuilderHost::BlobBuildingState::BlobBuildingState() |
+ : next_request(0), |
+ num_fulfilled_requests(0), |
+ num_shared_memory_requests(0), |
+ current_shared_memory_handle_index(0) {} |
+ |
+BlobAsyncBuilderHost::BlobBuildingState::~BlobBuildingState() {} |
+ |
+BlobAsyncBuilderHost::BlobAsyncBuilderHost() {} |
+ |
+BlobAsyncBuilderHost::~BlobAsyncBuilderHost() {} |
+ |
+bool BlobAsyncBuilderHost::StartBuildingBlob( |
+ const std::string& uuid, |
+ const std::string& type, |
+ const std::vector<DataElement>& descriptions, |
+ size_t memory_available, |
+ const base::Callback<void(const std::vector<storage::BlobItemBytesRequest>&, |
+ const std::vector<base::SharedMemoryHandle>&, |
+ const std::vector<uint64_t>&)>& request_memory, |
+ const base::Callback<void(const BlobDataBuilder&)>& done, |
+ const base::Callback<void(IPCBlobCreationCancelCode)>& cancel) { |
+ if (async_blob_map_.find(uuid) != async_blob_map_.end()) |
+ return false; |
+ if (BlobAsyncTransportStrategy::ShouldBeShortcut(descriptions, |
+ memory_available)) { |
+ // We have enough memory, and all the data is here, so we use the shortcut |
+ // method and populate the old way. |
+ BlobDataBuilder builder(uuid); |
+ builder.set_content_type(type); |
+ for (const DataElement& element : descriptions) { |
+ builder.AppendIPCDataElement(element); |
+ } |
+ done.Run(builder); |
+ return true; |
+ } |
+ |
+ scoped_ptr<BlobBuildingState> state(new BlobBuildingState()); |
+ BlobBuildingState* state_ptr = state.get(); |
+ async_blob_map_[uuid] = std::move(state); |
+ state_ptr->type = type; |
+ state_ptr->request_memory_callback = request_memory; |
+ state_ptr->done_callback = done; |
+ state_ptr->cancel_callback = cancel; |
+ |
+ // We are currently only operating in 'no disk' mode. This will change in |
+ // future patches to enable disk storage. |
+ // Since we don't have a disk yet, we put 0 for disk_space_left. |
+ state_ptr->transport_strategy.Initialize( |
+ max_ipc_memory_size_, max_shared_memory_size_, max_file_size_, |
+ 0 /* disk_space_left */, memory_available, uuid, descriptions); |
+ |
+ switch (state_ptr->transport_strategy.error()) { |
+ case BlobAsyncTransportStrategy::ERROR_TOO_LARGE: |
+ // Cancel cleanly, we're out of memory. |
+ CancelAndCleanup(uuid, IPCBlobCreationCancelCode::OUT_OF_MEMORY); |
+ return true; |
+ case BlobAsyncTransportStrategy::ERROR_INVALID_PARAMS: |
+ // Bad IPC, so we ignore and clean up. |
+ VLOG(1) << "Error initializing transport strategy: " |
+ << state_ptr->transport_strategy.error(); |
+ async_blob_map_.erase(async_blob_map_.find(uuid)); |
+ return false; |
+ case BlobAsyncTransportStrategy::ERROR_NONE: |
+ ContinueBlobMemoryRequests(uuid); |
+ return true; |
+ } |
+ return false; |
+} |
+ |
+bool BlobAsyncBuilderHost::OnMemoryResponses( |
+ const std::string& uuid, |
+ const std::vector<BlobItemBytesResponse>& responses) { |
+ if (responses.empty()) { |
+ return false; |
+ } |
+ AsyncBlobMap::const_iterator state_it = async_blob_map_.find(uuid); |
+ if (state_it == async_blob_map_.end()) { |
+ // There's a possibility that we had a shared memory error, and there were |
+ // still responses in flight. So we don't fail here, we just ignore. |
+ DVLOG(1) << "Could not find blob " << uuid; |
+ return true; |
+ } |
+ BlobAsyncBuilderHost::BlobBuildingState* state = state_it->second.get(); |
+ BlobAsyncTransportStrategy& strategy = state->transport_strategy; |
+ bool invalid_ipc = false; |
+ bool memory_error = false; |
+ const auto& requests = strategy.requests(); |
+ for (const BlobItemBytesResponse& response : responses) { |
+ if (response.request_number >= requests.size()) { |
+ // Bad IPC, so we delete our record and ignore. |
+ DVLOG(1) << "Invalid request number " << response.request_number; |
+ async_blob_map_.erase(state_it); |
+ return false; |
+ } |
+ const MemoryItemRequest& request = requests[response.request_number]; |
+ if (request.received) { |
+ // Bad IPC, so we delete our record. |
+ DVLOG(1) << "Already received response for that request."; |
+ async_blob_map_.erase(state_it); |
+ return false; |
+ } |
+ strategy.MarkRequestAsReceived(response.request_number); |
+ switch (request.message.transport_strategy) { |
+ case IPCBlobItemRequestStrategy::IPC: |
+ if (response.inline_data.size() < request.message.size) { |
+ DVLOG(1) << "Invalid data size " << response.inline_data.size() |
+ << " vs requested size of " << request.message.size; |
+ invalid_ipc = true; |
+ break; |
+ } |
+ invalid_ipc = !strategy.blob_builder()->PopulateFutureData( |
+ request.browser_item_index, &response.inline_data[0], |
+ request.browser_item_offset, request.message.size); |
+ break; |
+ case IPCBlobItemRequestStrategy::SHARED_MEMORY: |
+ if (state->num_shared_memory_requests == 0) { |
+ DVLOG(1) << "Received too many responses for shared memory."; |
+ invalid_ipc = true; |
+ break; |
+ } |
+ state->num_shared_memory_requests--; |
+ if (!state->shared_memory_block->memory()) { |
+ // We just map the whole block, as we'll probably be accessing the |
+ // whole thing in this group of responses. Another option is to use |
+ // MapAt, remove the mapped boolean, and then exclude the |
+ // handle_offset below. |
+ size_t handle_size = strategy.handle_sizes().at( |
+ state->current_shared_memory_handle_index); |
+ if (!state->shared_memory_block->Map(handle_size)) { |
+ DVLOG(1) << "Unable to map memory to size " << handle_size; |
+ memory_error = true; |
+ break; |
+ } |
+ } |
+ |
+ invalid_ipc = !strategy.blob_builder()->PopulateFutureData( |
+ request.browser_item_index, |
+ static_cast<const char*>(state->shared_memory_block->memory()) + |
+ request.message.handle_offset, |
+ request.browser_item_offset, request.message.size); |
+ break; |
+ case IPCBlobItemRequestStrategy::FILE: |
+ case IPCBlobItemRequestStrategy::UNKNOWN: |
+ DVLOG(1) << "Not implemented."; |
+ invalid_ipc = true; |
+ break; |
+ } |
+ if (invalid_ipc) { |
+ // Bad IPC, so we delete our record and return false. |
+ async_blob_map_.erase(state_it); |
+ return false; |
+ } |
+ if (memory_error) { |
+ DVLOG(1) << "Shared memory error."; |
+ CancelAndCleanup(uuid, IPCBlobCreationCancelCode::OUT_OF_MEMORY); |
+ return true; |
+ } |
+ state->num_fulfilled_requests++; |
+ } |
+ ContinueBlobMemoryRequests(uuid); |
+ return true; |
+} |
+ |
+void BlobAsyncBuilderHost::StopBuildingBlob(const std::string& uuid) { |
+ async_blob_map_.erase(async_blob_map_.find(uuid)); |
+} |
+ |
+void BlobAsyncBuilderHost::ContinueBlobMemoryRequests(const std::string& uuid) { |
+ AsyncBlobMap::const_iterator state_it = async_blob_map_.find(uuid); |
+ DCHECK(state_it != async_blob_map_.end()); |
+ BlobAsyncBuilderHost::BlobBuildingState* state = state_it->second.get(); |
+ |
+ const std::vector<MemoryItemRequest>& requests = |
+ state->transport_strategy.requests(); |
+ BlobAsyncTransportStrategy& strategy = state->transport_strategy; |
+ size_t num_requests = requests.size(); |
+ if (state->num_fulfilled_requests == num_requests) { |
+ DoneAndCleanup(uuid); |
+ return; |
+ } |
+ DCHECK_LT(state->num_fulfilled_requests, num_requests); |
+ if (state->next_request == num_requests) { |
+ // We are still waiting on other requests to come back. |
+ return; |
+ } |
+ |
+ std::vector<BlobItemBytesRequest> byte_requests; |
+ std::vector<base::SharedMemoryHandle> shared_memory; |
+ std::vector<uint64_t> files; |
+ |
+ for (; state->next_request < num_requests; ++state->next_request) { |
+ const MemoryItemRequest& request = requests[state->next_request]; |
+ |
+ bool stop_accumulating = false; |
+ bool using_shared_memory_handle = state->num_shared_memory_requests > 0; |
+ switch (request.message.transport_strategy) { |
+ case IPCBlobItemRequestStrategy::IPC: |
+ byte_requests.push_back(request.message); |
+ break; |
+ case IPCBlobItemRequestStrategy::SHARED_MEMORY: |
+ if (using_shared_memory_handle && |
+ state->current_shared_memory_handle_index != |
+ request.message.handle_index) { |
+ // We only want one shared memory per requesting blob. |
+ stop_accumulating = true; |
+ break; |
+ } |
+ using_shared_memory_handle = true; |
+ state->current_shared_memory_handle_index = |
+ request.message.handle_index; |
+ state->num_shared_memory_requests++; |
+ |
+ if (!state->shared_memory_block) { |
+ state->shared_memory_block.reset(new base::SharedMemory()); |
+ size_t size = strategy.handle_sizes()[request.message.handle_index]; |
+ if (!state->shared_memory_block->CreateAnonymous(size)) { |
+ DVLOG(1) << "Unable to allocate shared memory for blob transfer."; |
+ CancelAndCleanup(uuid, IPCBlobCreationCancelCode::OUT_OF_MEMORY); |
+ return; |
+ } |
+ } |
+ shared_memory.push_back(state->shared_memory_block->handle()); |
+ byte_requests.push_back(request.message); |
+ // Since we are only using one handle at a time, transform our handle |
+ // index correctly back to 0. |
+ byte_requests.back().handle_index = 0; |
+ break; |
+ case IPCBlobItemRequestStrategy::FILE: |
+ case IPCBlobItemRequestStrategy::UNKNOWN: |
+ NOTREACHED() << "Not implemented yet."; |
+ break; |
+ } |
+ if (stop_accumulating) { |
+ break; |
+ } |
+ } |
+ |
+ DCHECK(!requests.empty()); |
+ |
+ state->request_memory_callback.Run(byte_requests, shared_memory, files); |
+} |
+ |
+void BlobAsyncBuilderHost::CancelAndCleanup(const std::string& uuid, |
+ IPCBlobCreationCancelCode code) { |
+ scoped_ptr<BlobBuildingState> state = std::move(async_blob_map_[uuid]); |
+ async_blob_map_.erase(uuid); |
+ state->cancel_callback.Run(code); |
+} |
+ |
+void BlobAsyncBuilderHost::DoneAndCleanup(const std::string& uuid) { |
+ scoped_ptr<BlobBuildingState> state = std::move(async_blob_map_[uuid]); |
+ async_blob_map_.erase(uuid); |
+ BlobDataBuilder* builder = state->transport_strategy.blob_builder(); |
+ builder->set_content_type(state->type); |
+ state->done_callback.Run(*builder); |
+} |
+ |
+} // namespace storage |