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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 | |
3 // found in the LICENSE file. | |
4 | |
5 #include "mojo/edk/system/mapping_table.h" | |
6 | |
7 #include "base/logging.h" | |
8 #include "mojo/edk/embedder/platform_shared_buffer.h" | |
9 #include "mojo/edk/system/configuration.h" | |
10 | |
11 namespace mojo { | |
12 namespace system { | |
13 | |
14 MappingTable::MappingTable() { | |
15 } | |
16 | |
17 MappingTable::~MappingTable() { | |
18 // This should usually not be reached (the only instance should be owned by | |
19 // the singleton |Core|, which lives forever), except in tests. | |
20 } | |
21 | |
22 MojoResult MappingTable::AddMapping( | |
23 scoped_ptr<embedder::PlatformSharedBufferMapping> mapping) { | |
24 DCHECK(mapping); | |
25 | |
26 if (address_to_mapping_map_.size() >= | |
27 GetConfiguration().max_mapping_table_sze) | |
28 return MOJO_RESULT_RESOURCE_EXHAUSTED; | |
29 | |
30 uintptr_t address = reinterpret_cast<uintptr_t>(mapping->GetBase()); | |
31 DCHECK(address_to_mapping_map_.find(address) == | |
32 address_to_mapping_map_.end()); | |
33 address_to_mapping_map_[address] = mapping.release(); | |
34 return MOJO_RESULT_OK; | |
35 } | |
36 | |
37 MojoResult MappingTable::RemoveMapping(uintptr_t address) { | |
38 AddressToMappingMap::iterator it = address_to_mapping_map_.find(address); | |
39 if (it == address_to_mapping_map_.end()) | |
40 return MOJO_RESULT_INVALID_ARGUMENT; | |
41 embedder::PlatformSharedBufferMapping* mapping_to_delete = it->second; | |
42 address_to_mapping_map_.erase(it); | |
43 delete mapping_to_delete; | |
44 return MOJO_RESULT_OK; | |
45 } | |
46 | |
47 } // namespace system | |
48 } // namespace mojo | |
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