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/system/mapping_table.h" 6 7 #include "base/logging.h" 8 #include "mojo/embedder/platform_shared_buffer.h" 9 #include "mojo/system/constants.h" 10 11 namespace mojo { 12 namespace system { 13 MappingTable()14MappingTable::MappingTable() { 15 } 16 ~MappingTable()17MappingTable::~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 AddMapping(scoped_ptr<embedder::PlatformSharedBufferMapping> mapping)22MojoResult MappingTable::AddMapping( 23 scoped_ptr<embedder::PlatformSharedBufferMapping> mapping) { 24 DCHECK(mapping); 25 26 if (address_to_mapping_map_.size() >= kMaxMappingTableSize) 27 return MOJO_RESULT_RESOURCE_EXHAUSTED; 28 29 uintptr_t address = reinterpret_cast<uintptr_t>(mapping->GetBase()); 30 DCHECK(address_to_mapping_map_.find(address) == 31 address_to_mapping_map_.end()); 32 address_to_mapping_map_[address] = mapping.release(); 33 return MOJO_RESULT_OK; 34 } 35 RemoveMapping(uintptr_t address)36MojoResult MappingTable::RemoveMapping(uintptr_t address) { 37 AddressToMappingMap::iterator it = address_to_mapping_map_.find(address); 38 if (it == address_to_mapping_map_.end()) 39 return MOJO_RESULT_INVALID_ARGUMENT; 40 embedder::PlatformSharedBufferMapping* mapping_to_delete = it->second; 41 address_to_mapping_map_.erase(it); 42 delete mapping_to_delete; 43 return MOJO_RESULT_OK; 44 } 45 46 } // namespace system 47 } // namespace mojo 48