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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_HANDLE_TABLE_H_ | 5 #ifndef MOJO_EDK_SYSTEM_HANDLE_TABLE_H_ |
6 #define MOJO_EDK_SYSTEM_HANDLE_TABLE_H_ | 6 #define MOJO_EDK_SYSTEM_HANDLE_TABLE_H_ |
7 | 7 |
8 #include <stddef.h> | 8 #include <stddef.h> |
9 | 9 |
10 #include <unordered_map> | 10 #include <unordered_map> |
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49 // convenient for there to be a "GetDispatcher()" that automatically does | 49 // convenient for there to be a "GetDispatcher()" that automatically does |
50 // rights-checking.) | 50 // rights-checking.) |
51 | 51 |
52 // On success, gets the handle for the given handle value (which should not be | 52 // On success, gets the handle for the given handle value (which should not be |
53 // |MOJO_HANDLE_INVALID|). On failure, returns an appropriate result (and | 53 // |MOJO_HANDLE_INVALID|). On failure, returns an appropriate result (and |
54 // leaves |*handle| alone), namely |MOJO_RESULT_INVALID_ARGUMENT| if there's | 54 // leaves |*handle| alone), namely |MOJO_RESULT_INVALID_ARGUMENT| if there's |
55 // no handle for the given handle value or |MOJO_RESULT_BUSY| if the handle is | 55 // no handle for the given handle value or |MOJO_RESULT_BUSY| if the handle is |
56 // marked as busy. | 56 // marked as busy. |
57 MojoResult GetHandle(MojoHandle handle_value, Handle* handle); | 57 MojoResult GetHandle(MojoHandle handle_value, Handle* handle); |
58 | 58 |
59 // Like |GetDispatcher()|, but on success also removes the handle value from | 59 // Like |GetHandle()|, but on success also removes the handle value from the |
60 // the handle table. | 60 // handle table. |
61 MojoResult GetAndRemoveDispatcher(MojoHandle handle_value, | 61 MojoResult GetAndRemoveHandle(MojoHandle handle_value, Handle* handle); |
62 util::RefPtr<Dispatcher>* dispatcher); | |
63 | 62 |
64 // Adds a handle (which must have a dispatcher), returning the handle value | 63 // Adds a handle (which must have a dispatcher), returning the handle value |
65 // for it. Returns |MOJO_HANDLE_INVALID| on failure (if the handle table is | 64 // for it. Returns |MOJO_HANDLE_INVALID| on failure (if the handle table is |
66 // full). | 65 // full). |
67 MojoHandle AddHandle(Handle&& handle); | 66 MojoHandle AddHandle(Handle&& handle); |
68 | 67 |
69 // Adds a pair of handles (both of which must be valid), returning a pair of | 68 // Adds a pair of handles (both of which must be valid), returning a pair of |
70 // handle values for them. On failure (if the handle table is full), the | 69 // handle values for them. On failure (if the handle table is full), the |
71 // (first and second) handle values will be |MOJO_HANDLE_INVALID|, and neither | 70 // (first and second) handle values will be |MOJO_HANDLE_INVALID|, and neither |
72 // dispatcher will be added. | 71 // dispatcher will be added. |
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143 HandleToEntryMap handle_to_entry_map_; | 142 HandleToEntryMap handle_to_entry_map_; |
144 MojoHandle next_handle_value_; // Invariant: never |MOJO_HANDLE_INVALID|. | 143 MojoHandle next_handle_value_; // Invariant: never |MOJO_HANDLE_INVALID|. |
145 | 144 |
146 MOJO_DISALLOW_COPY_AND_ASSIGN(HandleTable); | 145 MOJO_DISALLOW_COPY_AND_ASSIGN(HandleTable); |
147 }; | 146 }; |
148 | 147 |
149 } // namespace system | 148 } // namespace system |
150 } // namespace mojo | 149 } // namespace mojo |
151 | 150 |
152 #endif // MOJO_EDK_SYSTEM_HANDLE_TABLE_H_ | 151 #endif // MOJO_EDK_SYSTEM_HANDLE_TABLE_H_ |
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