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Unified Diff: storage/common/blob_storage/blob_item_bytes_request.h

Issue 1288373002: [BlobAsync] Patch 2: Common Constants (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@async1
Patch Set: Created 5 years, 4 months ago
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Index: storage/common/blob_storage/blob_item_bytes_request.h
diff --git a/storage/common/blob_storage/blob_item_bytes_request.h b/storage/common/blob_storage/blob_item_bytes_request.h
new file mode 100644
index 0000000000000000000000000000000000000000..8cc7cd96d70ed236822d95b815a112bb3a02b74f
--- /dev/null
+++ b/storage/common/blob_storage/blob_item_bytes_request.h
@@ -0,0 +1,120 @@
+// 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.
+
+#ifndef STORAGE_COMMON_FILEAPI_BLOB_ITEM_BYTES_REQUEST_H_
+#define STORAGE_COMMON_FILEAPI_BLOB_ITEM_BYTES_REQUEST_H_
+
+#include <stdint.h>
+#include <ostream>
+
+#include "base/basictypes.h"
+#include "storage/common/blob_storage/blob_storage_constants.h"
+#include "storage/common/storage_common_export.h"
+
+namespace storage {
+
+// This class is serialized over IPC to request bytes from a blob item.
+struct STORAGE_COMMON_EXPORT BlobItemBytesRequest {
+ // not using std::numeric_limits<T>::max() because of non-C++11 builds.
+ static const size_t kInvalidIndex = SIZE_MAX;
+ static const uint64_t kInvalidSize = kuint64max;
+
+ static BlobItemBytesRequest CreateIPCRequest(size_t request_number,
michaeln 2015/08/18 03:04:41 Not sure the set of create helpers is needed? At t
dmurph 2015/09/15 01:12:12 You'll notice some constants below though, which h
+ size_t renderer_item_index,
+ size_t renderer_item_offset,
+ size_t size) {
+ return BlobItemBytesRequest(request_number, IPCBlobItemRequestStrategy::IPC,
+ renderer_item_index, renderer_item_offset, size,
+ kInvalidIndex, kInvalidSize);
+ }
+
+ static BlobItemBytesRequest CreateSharedMemoryRequest(
+ size_t request_number,
+ size_t renderer_item_index,
+ size_t renderer_item_offset,
+ size_t size,
+ size_t handle_index,
+ uint64_t handle_offset) {
+ return BlobItemBytesRequest(request_number,
+ IPCBlobItemRequestStrategy::SHARED_MEMORY,
+ renderer_item_index, renderer_item_offset, size,
+ handle_index, handle_offset);
+ }
+
+ static BlobItemBytesRequest CreateFileRequest(size_t request_number,
+ size_t renderer_item_index,
+ uint64_t renderer_item_offset,
+ uint64_t size,
+ size_t handle_index,
+ uint64_t handle_offset) {
+ return BlobItemBytesRequest(
+ request_number, IPCBlobItemRequestStrategy::FILE, renderer_item_index,
+ renderer_item_offset, size, handle_index, handle_offset);
+ }
+
+ BlobItemBytesRequest()
+ : request_number(kInvalidIndex),
+ transport_strategy(IPCBlobItemRequestStrategy::UNKNOWN),
+ renderer_item_index(kInvalidIndex),
+ renderer_item_offset(kInvalidSize),
+ size(kInvalidSize),
+ handle_index(kInvalidIndex),
+ handle_offset(kInvalidSize) {}
+ ~BlobItemBytesRequest() {}
+
+ BlobItemBytesRequest(size_t request_number,
+ IPCBlobItemRequestStrategy transport_strategy,
+ size_t renderer_item_index,
+ uint64_t renderer_item_offset,
+ uint64_t size,
+ size_t handle_index,
+ uint64_t handle_offset)
+ : request_number(request_number),
+ transport_strategy(transport_strategy),
+ renderer_item_index(renderer_item_index),
+ renderer_item_offset(renderer_item_offset),
+ size(size),
+ handle_index(handle_index),
+ handle_offset(handle_offset) {}
+
+ size_t request_number;
+ IPCBlobItemRequestStrategy transport_strategy;
+ size_t renderer_item_index;
+ uint64_t renderer_item_offset;
+ uint64_t size;
+ size_t handle_index;
+ uint64_t handle_offset;
+};
+
+#if defined(UNIT_TEST)
+STORAGE_COMMON_EXPORT inline bool operator==(const BlobItemBytesRequest& a,
+ const BlobItemBytesRequest& b) {
+ return a.request_number == b.request_number &&
+ a.transport_strategy == b.transport_strategy &&
+ a.renderer_item_index == b.renderer_item_index &&
+ a.renderer_item_offset == b.renderer_item_offset && a.size == b.size &&
+ a.handle_index == b.handle_index && a.handle_offset == b.handle_offset;
+}
+
+STORAGE_COMMON_EXPORT inline bool operator!=(const BlobItemBytesRequest& a,
+ const BlobItemBytesRequest& b) {
+ return !(a == b);
+}
+
+STORAGE_COMMON_EXPORT inline ::std::ostream& operator<<(
+ ::std::ostream& os,
+ const BlobItemBytesRequest& request) {
+ os << "{ request_number: " << request.request_number
+ << ", transport_strategy: " << static_cast<int>(request.transport_strategy)
+ << ", renderer_item_index: " << request.renderer_item_index
+ << ", renderer_item_offset: " << request.renderer_item_offset
+ << ", size: " << request.size << ", handle_index: " << request.handle_index
+ << ", handle_offset: " << request.handle_offset << " }";
+ return os;
+}
+#endif // defined(UNIT_TEST)
+
+} // namespace storage
+
+#endif // STORAGE_COMMON_FILEAPI_BLOB_ITEM_BYTES_REQUEST_H_

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