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

Issue 345463003: Mojo: MojoWaitFlags -> MojoHandleSignals. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: 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_DISPATCHER_H_ 5 #ifndef MOJO_SYSTEM_DISPATCHER_H_
6 #define MOJO_SYSTEM_DISPATCHER_H_ 6 #define MOJO_SYSTEM_DISPATCHER_H_
7 7
8 #include <stddef.h> 8 #include <stddef.h>
9 #include <stdint.h> 9 #include <stdint.h>
10 10
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110 // new handle on success). 110 // new handle on success).
111 MojoResult DuplicateBufferHandle( 111 MojoResult DuplicateBufferHandle(
112 const MojoDuplicateBufferHandleOptions* options, 112 const MojoDuplicateBufferHandleOptions* options,
113 scoped_refptr<Dispatcher>* new_dispatcher); 113 scoped_refptr<Dispatcher>* new_dispatcher);
114 MojoResult MapBuffer(uint64_t offset, 114 MojoResult MapBuffer(uint64_t offset,
115 uint64_t num_bytes, 115 uint64_t num_bytes,
116 MojoMapBufferFlags flags, 116 MojoMapBufferFlags flags,
117 scoped_ptr<RawSharedBufferMapping>* mapping); 117 scoped_ptr<RawSharedBufferMapping>* mapping);
118 118
119 // Adds a waiter to this dispatcher. The waiter will be woken up when this 119 // Adds a waiter to this dispatcher. The waiter will be woken up when this
120 // object changes state to satisfy |flags| with context |context|. It will 120 // object changes state to satisfy |signals| with context |context|. It will
121 // also be woken up when it becomes impossible for the object to ever satisfy 121 // also be woken up when it becomes impossible for the object to ever satisfy
122 // |flags| with a suitable error status. 122 // |signals| with a suitable error status.
123 // 123 //
124 // Returns: 124 // Returns:
125 // - |MOJO_RESULT_OK| if the waiter was added; 125 // - |MOJO_RESULT_OK| if the waiter was added;
126 // - |MOJO_RESULT_ALREADY_EXISTS| if |flags| is already satisfied; 126 // - |MOJO_RESULT_ALREADY_EXISTS| if |signals| is already satisfied;
127 // - |MOJO_RESULT_INVALID_ARGUMENT| if the dispatcher has been closed; and 127 // - |MOJO_RESULT_INVALID_ARGUMENT| if the dispatcher has been closed; and
128 // - |MOJO_RESULT_FAILED_PRECONDITION| if it is not (or no longer) possible 128 // - |MOJO_RESULT_FAILED_PRECONDITION| if it is not (or no longer) possible
129 // that |flags| will ever be satisfied. 129 // that |signals| will ever be satisfied.
130 MojoResult AddWaiter(Waiter* waiter, MojoWaitFlags flags, uint32_t context); 130 MojoResult AddWaiter(Waiter* waiter,
131 MojoHandleSignals signals,
132 uint32_t context);
131 void RemoveWaiter(Waiter* waiter); 133 void RemoveWaiter(Waiter* waiter);
132 134
133 // A dispatcher must be put into a special state in order to be sent across a 135 // A dispatcher must be put into a special state in order to be sent across a
134 // message pipe. Outside of tests, only |HandleTableAccess| is allowed to do 136 // message pipe. Outside of tests, only |HandleTableAccess| is allowed to do
135 // this, since there are requirements on the handle table (see below). 137 // this, since there are requirements on the handle table (see below).
136 // 138 //
137 // In this special state, only a restricted set of operations is allowed. 139 // In this special state, only a restricted set of operations is allowed.
138 // These are the ones available as |DispatcherTransport| methods. Other 140 // These are the ones available as |DispatcherTransport| methods. Other
139 // |Dispatcher| methods must not be called until |DispatcherTransport::End()| 141 // |Dispatcher| methods must not be called until |DispatcherTransport::End()|
140 // has been called. 142 // has been called.
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235 virtual MojoResult EndReadDataImplNoLock(uint32_t num_bytes_read); 237 virtual MojoResult EndReadDataImplNoLock(uint32_t num_bytes_read);
236 virtual MojoResult DuplicateBufferHandleImplNoLock( 238 virtual MojoResult DuplicateBufferHandleImplNoLock(
237 const MojoDuplicateBufferHandleOptions* options, 239 const MojoDuplicateBufferHandleOptions* options,
238 scoped_refptr<Dispatcher>* new_dispatcher); 240 scoped_refptr<Dispatcher>* new_dispatcher);
239 virtual MojoResult MapBufferImplNoLock( 241 virtual MojoResult MapBufferImplNoLock(
240 uint64_t offset, 242 uint64_t offset,
241 uint64_t num_bytes, 243 uint64_t num_bytes,
242 MojoMapBufferFlags flags, 244 MojoMapBufferFlags flags,
243 scoped_ptr<RawSharedBufferMapping>* mapping); 245 scoped_ptr<RawSharedBufferMapping>* mapping);
244 virtual MojoResult AddWaiterImplNoLock(Waiter* waiter, 246 virtual MojoResult AddWaiterImplNoLock(Waiter* waiter,
245 MojoWaitFlags flags, 247 MojoHandleSignals signals,
246 uint32_t context); 248 uint32_t context);
247 virtual void RemoveWaiterImplNoLock(Waiter* waiter); 249 virtual void RemoveWaiterImplNoLock(Waiter* waiter);
248 250
249 // These implement the API used to serialize dispatchers to a |Channel| 251 // These implement the API used to serialize dispatchers to a |Channel|
250 // (described below). They will only be called on a dispatcher that's attached 252 // (described below). They will only be called on a dispatcher that's attached
251 // to and "owned" by a |MessageInTransit|. See the non-"impl" versions for 253 // to and "owned" by a |MessageInTransit|. See the non-"impl" versions for
252 // more information. 254 // more information.
253 // 255 //
254 // Note: |StartSerializeImplNoLock()| is actually called with |lock_| NOT 256 // Note: |StartSerializeImplNoLock()| is actually called with |lock_| NOT
255 // held, since the dispatcher should only be accessible to the calling thread. 257 // held, since the dispatcher should only be accessible to the calling thread.
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368 370
369 Dispatcher* dispatcher_; 371 Dispatcher* dispatcher_;
370 372
371 // Copy and assign allowed. 373 // Copy and assign allowed.
372 }; 374 };
373 375
374 } // namespace system 376 } // namespace system
375 } // namespace mojo 377 } // namespace mojo
376 378
377 #endif // MOJO_SYSTEM_DISPATCHER_H_ 379 #endif // MOJO_SYSTEM_DISPATCHER_H_
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