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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "mojo/system/mapping_table.h"
#include "base/logging.h"
#include "mojo/system/constants.h"
#include "mojo/system/raw_shared_buffer.h"
namespace mojo {
namespace system {
MappingTable::MappingTable() {
}
MappingTable::~MappingTable() {
// This should usually not be reached (the only instance should be owned by
// the singleton |Core|, which lives forever), except in tests.
}
MojoResult MappingTable::AddMapping(
scoped_ptr<RawSharedBufferMapping> mapping) {
DCHECK(mapping);
if (address_to_mapping_map_.size() >= kMaxMappingTableSize)
return MOJO_RESULT_RESOURCE_EXHAUSTED;
uintptr_t address = reinterpret_cast<uintptr_t>(mapping->base());
DCHECK(address_to_mapping_map_.find(address) ==
address_to_mapping_map_.end());
address_to_mapping_map_[address] = mapping.release();
return MOJO_RESULT_OK;
}
MojoResult MappingTable::RemoveMapping(void* address) {
AddressToMappingMap::iterator it =
address_to_mapping_map_.find(reinterpret_cast<uintptr_t>(address));
if (it == address_to_mapping_map_.end())
return MOJO_RESULT_INVALID_ARGUMENT;
RawSharedBufferMapping* mapping_to_delete = it->second;
address_to_mapping_map_.erase(it);
delete mapping_to_delete;
return MOJO_RESULT_OK;
}
} // namespace system
} // namespace mojo
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