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Side by Side Diff: mojo/system/data_pipe.h

Issue 339193005: Mojo: Rename (Mojo)WaitFlagsState -> (Mojo)HandleSignalsState. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: rebased Created 6 years, 6 months ago
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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_DATA_PIPE_H_ 5 #ifndef MOJO_SYSTEM_DATA_PIPE_H_
6 #define MOJO_SYSTEM_DATA_PIPE_H_ 6 #define MOJO_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"
11 #include "base/memory/ref_counted.h" 11 #include "base/memory/ref_counted.h"
12 #include "base/memory/scoped_ptr.h" 12 #include "base/memory/scoped_ptr.h"
13 #include "base/synchronization/lock.h" 13 #include "base/synchronization/lock.h"
14 #include "mojo/public/c/system/data_pipe.h" 14 #include "mojo/public/c/system/data_pipe.h"
15 #include "mojo/public/c/system/types.h" 15 #include "mojo/public/c/system/types.h"
16 #include "mojo/system/handle_signals_state.h"
16 #include "mojo/system/system_impl_export.h" 17 #include "mojo/system/system_impl_export.h"
17 #include "mojo/system/wait_flags_state.h"
18 18
19 namespace mojo { 19 namespace mojo {
20 namespace system { 20 namespace system {
21 21
22 class Waiter; 22 class Waiter;
23 class WaiterList; 23 class WaiterList;
24 24
25 // |DataPipe| is a base class for secondary objects implementing data pipes, 25 // |DataPipe| is a base class for secondary objects implementing data pipes,
26 // similar to |MessagePipe| (see the explanatory comment in core.cc). It is 26 // similar to |MessagePipe| (see the explanatory comment in core.cc). It is
27 // typically owned by the dispatcher(s) corresponding to the local endpoints. 27 // typically owned by the dispatcher(s) corresponding to the local endpoints.
(...skipping 73 matching lines...) Expand 10 before | Expand all | Expand 10 after
101 virtual MojoResult ProducerWriteDataImplNoLock(const void* elements, 101 virtual MojoResult ProducerWriteDataImplNoLock(const void* elements,
102 uint32_t* num_bytes, 102 uint32_t* num_bytes,
103 bool all_or_none) = 0; 103 bool all_or_none) = 0;
104 virtual MojoResult ProducerBeginWriteDataImplNoLock( 104 virtual MojoResult ProducerBeginWriteDataImplNoLock(
105 void** buffer, 105 void** buffer,
106 uint32_t* buffer_num_bytes, 106 uint32_t* buffer_num_bytes,
107 bool all_or_none) = 0; 107 bool all_or_none) = 0;
108 virtual MojoResult ProducerEndWriteDataImplNoLock( 108 virtual MojoResult ProducerEndWriteDataImplNoLock(
109 uint32_t num_bytes_written) = 0; 109 uint32_t num_bytes_written) = 0;
110 // Note: A producer should not be writable during a two-phase write. 110 // Note: A producer should not be writable during a two-phase write.
111 virtual WaitFlagsState ProducerGetWaitFlagsStateNoLock() const = 0; 111 virtual HandleSignalsState ProducerGetHandleSignalsStateNoLock() const = 0;
112 112
113 virtual void ConsumerCloseImplNoLock() = 0; 113 virtual void ConsumerCloseImplNoLock() = 0;
114 // |*num_bytes| will be a nonzero multiple of |element_num_bytes_|. 114 // |*num_bytes| will be a nonzero multiple of |element_num_bytes_|.
115 virtual MojoResult ConsumerReadDataImplNoLock(void* elements, 115 virtual MojoResult ConsumerReadDataImplNoLock(void* elements,
116 uint32_t* num_bytes, 116 uint32_t* num_bytes,
117 bool all_or_none) = 0; 117 bool all_or_none) = 0;
118 virtual MojoResult ConsumerDiscardDataImplNoLock(uint32_t* num_bytes, 118 virtual MojoResult ConsumerDiscardDataImplNoLock(uint32_t* num_bytes,
119 bool all_or_none) = 0; 119 bool all_or_none) = 0;
120 // |*num_bytes| will be a nonzero multiple of |element_num_bytes_|. 120 // |*num_bytes| will be a nonzero multiple of |element_num_bytes_|.
121 virtual MojoResult ConsumerQueryDataImplNoLock(uint32_t* num_bytes) = 0; 121 virtual MojoResult ConsumerQueryDataImplNoLock(uint32_t* num_bytes) = 0;
122 virtual MojoResult ConsumerBeginReadDataImplNoLock(const void** buffer, 122 virtual MojoResult ConsumerBeginReadDataImplNoLock(const void** buffer,
123 uint32_t* buffer_num_bytes, 123 uint32_t* buffer_num_bytes,
124 bool all_or_none) = 0; 124 bool all_or_none) = 0;
125 virtual MojoResult ConsumerEndReadDataImplNoLock(uint32_t num_bytes_read) = 0; 125 virtual MojoResult ConsumerEndReadDataImplNoLock(uint32_t num_bytes_read) = 0;
126 // Note: A consumer should not be writable during a two-phase read. 126 // Note: A consumer should not be writable during a two-phase read.
127 virtual WaitFlagsState ConsumerGetWaitFlagsStateNoLock() const = 0; 127 virtual HandleSignalsState ConsumerGetHandleSignalsStateNoLock() const = 0;
128 128
129 // Thread-safe and fast (they don't take the lock): 129 // Thread-safe and fast (they don't take the lock):
130 bool may_discard() const { return may_discard_; } 130 bool may_discard() const { return may_discard_; }
131 size_t element_num_bytes() const { return element_num_bytes_; } 131 size_t element_num_bytes() const { return element_num_bytes_; }
132 size_t capacity_num_bytes() const { return capacity_num_bytes_; } 132 size_t capacity_num_bytes() const { return capacity_num_bytes_; }
133 133
134 // Must be called under lock. 134 // Must be called under lock.
135 bool producer_open_no_lock() const { 135 bool producer_open_no_lock() const {
136 lock_.AssertAcquired(); 136 lock_.AssertAcquired();
137 return producer_open_; 137 return producer_open_;
(...skipping 23 matching lines...) Expand all
161 lock_.AssertAcquired(); 161 lock_.AssertAcquired();
162 return producer_two_phase_max_num_bytes_written_ > 0; 162 return producer_two_phase_max_num_bytes_written_ > 0;
163 } 163 }
164 bool consumer_in_two_phase_read_no_lock() const { 164 bool consumer_in_two_phase_read_no_lock() const {
165 lock_.AssertAcquired(); 165 lock_.AssertAcquired();
166 return consumer_two_phase_max_num_bytes_read_ > 0; 166 return consumer_two_phase_max_num_bytes_read_ > 0;
167 } 167 }
168 168
169 private: 169 private:
170 void AwakeProducerWaitersForStateChangeNoLock( 170 void AwakeProducerWaitersForStateChangeNoLock(
171 const WaitFlagsState& new_producer_state); 171 const HandleSignalsState& new_producer_state);
172 void AwakeConsumerWaitersForStateChangeNoLock( 172 void AwakeConsumerWaitersForStateChangeNoLock(
173 const WaitFlagsState& new_consumer_state); 173 const HandleSignalsState& new_consumer_state);
174 174
175 bool has_local_producer_no_lock() const { 175 bool has_local_producer_no_lock() const {
176 lock_.AssertAcquired(); 176 lock_.AssertAcquired();
177 return !!producer_waiter_list_; 177 return !!producer_waiter_list_;
178 } 178 }
179 bool has_local_consumer_no_lock() const { 179 bool has_local_consumer_no_lock() const {
180 lock_.AssertAcquired(); 180 lock_.AssertAcquired();
181 return !!consumer_waiter_list_; 181 return !!consumer_waiter_list_;
182 } 182 }
183 183
(...skipping 12 matching lines...) Expand all
196 uint32_t producer_two_phase_max_num_bytes_written_; 196 uint32_t producer_two_phase_max_num_bytes_written_;
197 uint32_t consumer_two_phase_max_num_bytes_read_; 197 uint32_t consumer_two_phase_max_num_bytes_read_;
198 198
199 DISALLOW_COPY_AND_ASSIGN(DataPipe); 199 DISALLOW_COPY_AND_ASSIGN(DataPipe);
200 }; 200 };
201 201
202 } // namespace system 202 } // namespace system
203 } // namespace mojo 203 } // namespace mojo
204 204
205 #endif // MOJO_SYSTEM_DATA_PIPE_H_ 205 #endif // MOJO_SYSTEM_DATA_PIPE_H_
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