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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_SYSTEM_LOCAL_DATA_PIPE_H_ | 5 #ifndef MOJO_SYSTEM_LOCAL_DATA_PIPE_H_ |
6 #define MOJO_SYSTEM_LOCAL_DATA_PIPE_H_ | 6 #define MOJO_SYSTEM_LOCAL_DATA_PIPE_H_ |
7 | 7 |
8 #include "base/macros.h" | 8 #include "base/macros.h" |
9 #include "base/memory/aligned_memory.h" | 9 #include "base/memory/aligned_memory.h" |
10 #include "base/memory/ref_counted.h" | 10 #include "base/memory/ref_counted.h" |
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23 // |validated_options| should be the output of |DataPipe::ValidateOptions()|. | 23 // |validated_options| should be the output of |DataPipe::ValidateOptions()|. |
24 // In particular: |struct_size| is ignored (so |validated_options| must be the | 24 // In particular: |struct_size| is ignored (so |validated_options| must be the |
25 // current version of the struct) and |capacity_num_bytes| must be nonzero. | 25 // current version of the struct) and |capacity_num_bytes| must be nonzero. |
26 explicit LocalDataPipe(const MojoCreateDataPipeOptions& validated_options); | 26 explicit LocalDataPipe(const MojoCreateDataPipeOptions& validated_options); |
27 | 27 |
28 private: | 28 private: |
29 friend class base::RefCountedThreadSafe<LocalDataPipe>; | 29 friend class base::RefCountedThreadSafe<LocalDataPipe>; |
30 virtual ~LocalDataPipe(); | 30 virtual ~LocalDataPipe(); |
31 | 31 |
32 // |DataPipe| implementation: | 32 // |DataPipe| implementation: |
33 virtual void ProducerCloseImplNoLock() OVERRIDE; | 33 virtual void ProducerCloseImplNoLock() override; |
34 virtual MojoResult ProducerWriteDataImplNoLock( | 34 virtual MojoResult ProducerWriteDataImplNoLock( |
35 UserPointer<const void> elements, | 35 UserPointer<const void> elements, |
36 UserPointer<uint32_t> num_bytes, | 36 UserPointer<uint32_t> num_bytes, |
37 uint32_t max_num_bytes_to_write, | 37 uint32_t max_num_bytes_to_write, |
38 uint32_t min_num_bytes_to_write) OVERRIDE; | 38 uint32_t min_num_bytes_to_write) override; |
39 virtual MojoResult ProducerBeginWriteDataImplNoLock( | 39 virtual MojoResult ProducerBeginWriteDataImplNoLock( |
40 UserPointer<void*> buffer, | 40 UserPointer<void*> buffer, |
41 UserPointer<uint32_t> buffer_num_bytes, | 41 UserPointer<uint32_t> buffer_num_bytes, |
42 uint32_t min_num_bytes_to_write) OVERRIDE; | 42 uint32_t min_num_bytes_to_write) override; |
43 virtual MojoResult ProducerEndWriteDataImplNoLock( | 43 virtual MojoResult ProducerEndWriteDataImplNoLock( |
44 uint32_t num_bytes_written) OVERRIDE; | 44 uint32_t num_bytes_written) override; |
45 virtual HandleSignalsState ProducerGetHandleSignalsStateImplNoLock() | 45 virtual HandleSignalsState ProducerGetHandleSignalsStateImplNoLock() |
46 const OVERRIDE; | 46 const override; |
47 virtual void ConsumerCloseImplNoLock() OVERRIDE; | 47 virtual void ConsumerCloseImplNoLock() override; |
48 virtual MojoResult ConsumerReadDataImplNoLock( | 48 virtual MojoResult ConsumerReadDataImplNoLock( |
49 UserPointer<void> elements, | 49 UserPointer<void> elements, |
50 UserPointer<uint32_t> num_bytes, | 50 UserPointer<uint32_t> num_bytes, |
51 uint32_t max_num_bytes_to_read, | 51 uint32_t max_num_bytes_to_read, |
52 uint32_t min_num_bytes_to_read) OVERRIDE; | 52 uint32_t min_num_bytes_to_read) override; |
53 virtual MojoResult ConsumerDiscardDataImplNoLock( | 53 virtual MojoResult ConsumerDiscardDataImplNoLock( |
54 UserPointer<uint32_t> num_bytes, | 54 UserPointer<uint32_t> num_bytes, |
55 uint32_t max_num_bytes_to_discard, | 55 uint32_t max_num_bytes_to_discard, |
56 uint32_t min_num_bytes_to_discard) OVERRIDE; | 56 uint32_t min_num_bytes_to_discard) override; |
57 virtual MojoResult ConsumerQueryDataImplNoLock( | 57 virtual MojoResult ConsumerQueryDataImplNoLock( |
58 UserPointer<uint32_t> num_bytes) OVERRIDE; | 58 UserPointer<uint32_t> num_bytes) override; |
59 virtual MojoResult ConsumerBeginReadDataImplNoLock( | 59 virtual MojoResult ConsumerBeginReadDataImplNoLock( |
60 UserPointer<const void*> buffer, | 60 UserPointer<const void*> buffer, |
61 UserPointer<uint32_t> buffer_num_bytes, | 61 UserPointer<uint32_t> buffer_num_bytes, |
62 uint32_t min_num_bytes_to_read) OVERRIDE; | 62 uint32_t min_num_bytes_to_read) override; |
63 virtual MojoResult ConsumerEndReadDataImplNoLock( | 63 virtual MojoResult ConsumerEndReadDataImplNoLock( |
64 uint32_t num_bytes_read) OVERRIDE; | 64 uint32_t num_bytes_read) override; |
65 virtual HandleSignalsState ConsumerGetHandleSignalsStateImplNoLock() | 65 virtual HandleSignalsState ConsumerGetHandleSignalsStateImplNoLock() |
66 const OVERRIDE; | 66 const override; |
67 | 67 |
68 void EnsureBufferNoLock(); | 68 void EnsureBufferNoLock(); |
69 void DestroyBufferNoLock(); | 69 void DestroyBufferNoLock(); |
70 | 70 |
71 // Get the maximum (single) write/read size right now (in number of elements); | 71 // Get the maximum (single) write/read size right now (in number of elements); |
72 // result fits in a |uint32_t|. | 72 // result fits in a |uint32_t|. |
73 size_t GetMaxNumBytesToWriteNoLock(); | 73 size_t GetMaxNumBytesToWriteNoLock(); |
74 size_t GetMaxNumBytesToReadNoLock(); | 74 size_t GetMaxNumBytesToReadNoLock(); |
75 | 75 |
76 // Marks the given number of bytes as consumed/discarded. |num_bytes| must be | 76 // Marks the given number of bytes as consumed/discarded. |num_bytes| must be |
77 // greater than |current_num_bytes_|. | 77 // greater than |current_num_bytes_|. |
78 void MarkDataAsConsumedNoLock(size_t num_bytes); | 78 void MarkDataAsConsumedNoLock(size_t num_bytes); |
79 | 79 |
80 // The members below are protected by |DataPipe|'s |lock_|: | 80 // The members below are protected by |DataPipe|'s |lock_|: |
81 scoped_ptr<char, base::AlignedFreeDeleter> buffer_; | 81 scoped_ptr<char, base::AlignedFreeDeleter> buffer_; |
82 // Circular buffer. | 82 // Circular buffer. |
83 size_t start_index_; | 83 size_t start_index_; |
84 size_t current_num_bytes_; | 84 size_t current_num_bytes_; |
85 | 85 |
86 DISALLOW_COPY_AND_ASSIGN(LocalDataPipe); | 86 DISALLOW_COPY_AND_ASSIGN(LocalDataPipe); |
87 }; | 87 }; |
88 | 88 |
89 } // namespace system | 89 } // namespace system |
90 } // namespace mojo | 90 } // namespace mojo |
91 | 91 |
92 #endif // MOJO_SYSTEM_LOCAL_DATA_PIPE_H_ | 92 #endif // MOJO_SYSTEM_LOCAL_DATA_PIPE_H_ |
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