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 edk { 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 std::unique_ptr<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 void* address = 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(void* 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 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 edk 48 } // namespace mojo 49
