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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 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 #ifndef MOJO_EDK_SYSTEM_TRANSPORT_DATA_H_ | 5 #ifndef MOJO_EDK_SYSTEM_TRANSPORT_DATA_H_ |
| 6 #define MOJO_EDK_SYSTEM_TRANSPORT_DATA_H_ | 6 #define MOJO_EDK_SYSTEM_TRANSPORT_DATA_H_ |
| 7 | 7 |
| 8 #include <stdint.h> | 8 #include <stdint.h> |
| 9 | 9 |
| 10 #include <memory> | 10 #include <memory> |
| 11 #include <vector> | 11 #include <vector> |
| 12 | 12 |
| 13 #include "base/memory/aligned_memory.h" | 13 #include "base/memory/aligned_memory.h" |
| 14 #include "base/memory/scoped_ptr.h" | |
| 15 #include "build/build_config.h" | |
| 16 #include "mojo/edk/embedder/platform_handle.h" | 14 #include "mojo/edk/embedder/platform_handle.h" |
| 17 #include "mojo/edk/embedder/platform_handle_vector.h" | 15 #include "mojo/edk/embedder/platform_handle_vector.h" |
| 18 #include "mojo/edk/system/dispatcher.h" | 16 #include "mojo/edk/system/dispatcher.h" |
| 19 #include "mojo/edk/system/system_impl_export.h" | 17 #include "mojo/edk/system/system_impl_export.h" |
| 20 #include "mojo/public/cpp/system/macros.h" | 18 #include "mojo/public/cpp/system/macros.h" |
| 21 | 19 |
| 22 namespace mojo { | 20 namespace mojo { |
| 23 namespace system { | 21 namespace system { |
| 24 | 22 |
| 25 class Channel; | 23 class Channel; |
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| 83 // The maximum number of platform handles to attach for a single serialized | 81 // The maximum number of platform handles to attach for a single serialized |
| 84 // dispatcher. | 82 // dispatcher. |
| 85 static const size_t kMaxSerializedDispatcherPlatformHandles = 2; | 83 static const size_t kMaxSerializedDispatcherPlatformHandles = 2; |
| 86 | 84 |
| 87 // The maximum possible size of a valid transport data buffer. | 85 // The maximum possible size of a valid transport data buffer. |
| 88 static size_t GetMaxBufferSize(); | 86 static size_t GetMaxBufferSize(); |
| 89 | 87 |
| 90 // The maximum total number of platform handles that may be attached. | 88 // The maximum total number of platform handles that may be attached. |
| 91 static size_t GetMaxPlatformHandles(); | 89 static size_t GetMaxPlatformHandles(); |
| 92 | 90 |
| 93 TransportData(scoped_ptr<DispatcherVector> dispatchers, Channel* channel); | 91 TransportData(std::unique_ptr<DispatcherVector> dispatchers, |
| 92 Channel* channel); |
| 94 | 93 |
| 95 // This is used for users of |MessageInTransit|/|TransportData|/|RawChannel| | 94 // This is used for users of |MessageInTransit|/|TransportData|/|RawChannel| |
| 96 // that want to simply transport data and platform handles, and not | 95 // that want to simply transport data and platform handles, and not |
| 97 // |Dispatcher|s. (|Header| will be present, and zero except for | 96 // |Dispatcher|s. (|Header| will be present, and zero except for |
| 98 // |num_platform_handles|, and |platform_handle_table_offset| if necessary.) | 97 // |num_platform_handles|, and |platform_handle_table_offset| if necessary.) |
| 99 explicit TransportData( | 98 explicit TransportData( |
| 100 embedder::ScopedPlatformHandleVectorPtr platform_handles, | 99 embedder::ScopedPlatformHandleVectorPtr platform_handles, |
| 101 size_t serialized_platform_handle_size); | 100 size_t serialized_platform_handle_size); |
| 102 | 101 |
| 103 ~TransportData(); | 102 ~TransportData(); |
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| 134 | 133 |
| 135 // Gets the platform handle table from a (valid) |TransportData| buffer (which | 134 // Gets the platform handle table from a (valid) |TransportData| buffer (which |
| 136 // should have been validated using |ValidateBuffer()| first). | 135 // should have been validated using |ValidateBuffer()| first). |
| 137 static void GetPlatformHandleTable(const void* transport_data_buffer, | 136 static void GetPlatformHandleTable(const void* transport_data_buffer, |
| 138 size_t* num_platform_handles, | 137 size_t* num_platform_handles, |
| 139 const void** platform_handle_table); | 138 const void** platform_handle_table); |
| 140 | 139 |
| 141 // Deserializes dispatchers from the given (serialized) transport data buffer | 140 // Deserializes dispatchers from the given (serialized) transport data buffer |
| 142 // (typically from a |MessageInTransit::View|) and vector of platform handles. | 141 // (typically from a |MessageInTransit::View|) and vector of platform handles. |
| 143 // |buffer| should be non-null and |buffer_size| should be nonzero. | 142 // |buffer| should be non-null and |buffer_size| should be nonzero. |
| 144 static scoped_ptr<DispatcherVector> DeserializeDispatchers( | 143 static std::unique_ptr<DispatcherVector> DeserializeDispatchers( |
| 145 const void* buffer, | 144 const void* buffer, |
| 146 size_t buffer_size, | 145 size_t buffer_size, |
| 147 embedder::ScopedPlatformHandleVectorPtr platform_handles, | 146 embedder::ScopedPlatformHandleVectorPtr platform_handles, |
| 148 Channel* channel); | 147 Channel* channel); |
| 149 | 148 |
| 150 private: | 149 private: |
| 151 // To allow us to make compile-assertions about |Header|, etc. in the .cc | 150 // To allow us to make compile-assertions about |Header|, etc. in the .cc |
| 152 // file. | 151 // file. |
| 153 struct PrivateStructForCompileAsserts; | 152 struct PrivateStructForCompileAsserts; |
| 154 | 153 |
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| 183 // TODO(vtl): With C++11, change it to a vector of |ScopedPlatformHandle|s. | 182 // TODO(vtl): With C++11, change it to a vector of |ScopedPlatformHandle|s. |
| 184 embedder::ScopedPlatformHandleVectorPtr platform_handles_; | 183 embedder::ScopedPlatformHandleVectorPtr platform_handles_; |
| 185 | 184 |
| 186 MOJO_DISALLOW_COPY_AND_ASSIGN(TransportData); | 185 MOJO_DISALLOW_COPY_AND_ASSIGN(TransportData); |
| 187 }; | 186 }; |
| 188 | 187 |
| 189 } // namespace system | 188 } // namespace system |
| 190 } // namespace mojo | 189 } // namespace mojo |
| 191 | 190 |
| 192 #endif // MOJO_EDK_SYSTEM_TRANSPORT_DATA_H_ | 191 #endif // MOJO_EDK_SYSTEM_TRANSPORT_DATA_H_ |
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