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| 1 // Copyright 2013 The Chromium Authors. All rights reserved. | 1 // Copyright 2013 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_DATA_PIPE_H_ | 5 #ifndef MOJO_EDK_SYSTEM_DATA_PIPE_H_ |
| 6 #define MOJO_EDK_SYSTEM_DATA_PIPE_H_ | 6 #define MOJO_EDK_SYSTEM_DATA_PIPE_H_ |
| 7 | 7 |
| 8 #include <stdint.h> | 8 #include <stdint.h> |
| 9 | 9 |
| 10 #include "base/macros.h" | 10 #include "base/macros.h" |
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| 28 // typically owned by the dispatcher(s) corresponding to the local endpoints. | 28 // typically owned by the dispatcher(s) corresponding to the local endpoints. |
| 29 // Its subclasses implement the three cases: local producer and consumer, local | 29 // Its subclasses implement the three cases: local producer and consumer, local |
| 30 // producer and remote consumer, and remote producer and local consumer. This | 30 // producer and remote consumer, and remote producer and local consumer. This |
| 31 // class is thread-safe. | 31 // class is thread-safe. |
| 32 class MOJO_SYSTEM_IMPL_EXPORT DataPipe | 32 class MOJO_SYSTEM_IMPL_EXPORT DataPipe |
| 33 : public base::RefCountedThreadSafe<DataPipe> { | 33 : public base::RefCountedThreadSafe<DataPipe> { |
| 34 public: | 34 public: |
| 35 // The default options for |MojoCreateDataPipe()|. (Real uses should obtain | 35 // The default options for |MojoCreateDataPipe()|. (Real uses should obtain |
| 36 // this via |ValidateCreateOptions()| with a null |in_options|; this is | 36 // this via |ValidateCreateOptions()| with a null |in_options|; this is |
| 37 // exposed directly for testing convenience.) | 37 // exposed directly for testing convenience.) |
| 38 static const MojoCreateDataPipeOptions kDefaultCreateOptions; | 38 static MojoCreateDataPipeOptions GetDefaultCreateOptions(); |
| 39 | 39 |
| 40 // Validates and/or sets default options for |MojoCreateDataPipeOptions|. If | 40 // Validates and/or sets default options for |MojoCreateDataPipeOptions|. If |
| 41 // non-null, |in_options| must point to a struct of at least | 41 // non-null, |in_options| must point to a struct of at least |
| 42 // |in_options->struct_size| bytes. |out_options| must point to a (current) | 42 // |in_options->struct_size| bytes. |out_options| must point to a (current) |
| 43 // |MojoCreateDataPipeOptions| and will be entirely overwritten on success (it | 43 // |MojoCreateDataPipeOptions| and will be entirely overwritten on success (it |
| 44 // may be partly overwritten on failure). | 44 // may be partly overwritten on failure). |
| 45 static MojoResult ValidateCreateOptions( | 45 static MojoResult ValidateCreateOptions( |
| 46 UserPointer<const MojoCreateDataPipeOptions> in_options, | 46 UserPointer<const MojoCreateDataPipeOptions> in_options, |
| 47 MojoCreateDataPipeOptions* out_options); | 47 MojoCreateDataPipeOptions* out_options); |
| 48 | 48 |
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| 110 UserPointer<uint32_t> buffer_num_bytes, | 110 UserPointer<uint32_t> buffer_num_bytes, |
| 111 uint32_t min_num_bytes_to_write) = 0; | 111 uint32_t min_num_bytes_to_write) = 0; |
| 112 virtual MojoResult ProducerEndWriteDataImplNoLock( | 112 virtual MojoResult ProducerEndWriteDataImplNoLock( |
| 113 uint32_t num_bytes_written) = 0; | 113 uint32_t num_bytes_written) = 0; |
| 114 // Note: A producer should not be writable during a two-phase write. | 114 // Note: A producer should not be writable during a two-phase write. |
| 115 virtual HandleSignalsState ProducerGetHandleSignalsStateImplNoLock() | 115 virtual HandleSignalsState ProducerGetHandleSignalsStateImplNoLock() |
| 116 const = 0; | 116 const = 0; |
| 117 | 117 |
| 118 virtual void ConsumerCloseImplNoLock() = 0; | 118 virtual void ConsumerCloseImplNoLock() = 0; |
| 119 // |*num_bytes| will be a nonzero multiple of |element_num_bytes_|. | 119 // |*num_bytes| will be a nonzero multiple of |element_num_bytes_|. |
| 120 virtual MojoResult ConsumerReadDataImplNoLock( | 120 virtual MojoResult ConsumerReadDataImplNoLock(UserPointer<void> elements, |
| 121 UserPointer<void> elements, | 121 UserPointer<uint32_t> num_bytes, |
| 122 UserPointer<uint32_t> num_bytes, | 122 uint32_t max_num_bytes_to_read, |
| 123 uint32_t max_num_bytes_to_read, | 123 uint32_t min_num_bytes_to_read, |
| 124 uint32_t min_num_bytes_to_read, | 124 bool peek) = 0; |
| 125 bool peek) = 0; | |
| 126 virtual MojoResult ConsumerDiscardDataImplNoLock( | 125 virtual MojoResult ConsumerDiscardDataImplNoLock( |
| 127 UserPointer<uint32_t> num_bytes, | 126 UserPointer<uint32_t> num_bytes, |
| 128 uint32_t max_num_bytes_to_discard, | 127 uint32_t max_num_bytes_to_discard, |
| 129 uint32_t min_num_bytes_to_discard) = 0; | 128 uint32_t min_num_bytes_to_discard) = 0; |
| 130 // |*num_bytes| will be a nonzero multiple of |element_num_bytes_|. | 129 // |*num_bytes| will be a nonzero multiple of |element_num_bytes_|. |
| 131 virtual MojoResult ConsumerQueryDataImplNoLock( | 130 virtual MojoResult ConsumerQueryDataImplNoLock( |
| 132 UserPointer<uint32_t> num_bytes) = 0; | 131 UserPointer<uint32_t> num_bytes) = 0; |
| 133 virtual MojoResult ConsumerBeginReadDataImplNoLock( | 132 virtual MojoResult ConsumerBeginReadDataImplNoLock( |
| 134 UserPointer<const void*> buffer, | 133 UserPointer<const void*> buffer, |
| 135 UserPointer<uint32_t> buffer_num_bytes, | 134 UserPointer<uint32_t> buffer_num_bytes, |
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| 209 uint32_t producer_two_phase_max_num_bytes_written_; | 208 uint32_t producer_two_phase_max_num_bytes_written_; |
| 210 uint32_t consumer_two_phase_max_num_bytes_read_; | 209 uint32_t consumer_two_phase_max_num_bytes_read_; |
| 211 | 210 |
| 212 DISALLOW_COPY_AND_ASSIGN(DataPipe); | 211 DISALLOW_COPY_AND_ASSIGN(DataPipe); |
| 213 }; | 212 }; |
| 214 | 213 |
| 215 } // namespace system | 214 } // namespace system |
| 216 } // namespace mojo | 215 } // namespace mojo |
| 217 | 216 |
| 218 #endif // MOJO_EDK_SYSTEM_DATA_PIPE_H_ | 217 #endif // MOJO_EDK_SYSTEM_DATA_PIPE_H_ |
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