database_holder_impl.h

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#pragma once

#include "mongo/db/catalog/database_holder.h"

#include <set>
#include <string>

#include "mongo/base/string_data.h"
#include "mongo/db/namespace_string.h"
#include "mongo/stdx/mutex.h"
#include "mongo/util/concurrency/mutex.h"
#include "mongo/util/string_map.h"

namespace mongo {

class Database;
class OperationContext;

class DatabaseHolderImpl : public DatabaseHolder::Impl {
public:
    DatabaseHolderImpl() = default;

    Database* get(OperationContext* opCtx, StringData ns) const override;

    Database* openDb(OperationContext* opCtx, StringData ns, bool* justCreated = nullptr) override;

    void close(OperationContext* opCtx, StringData ns, const std::string& reason) override;

    void closeAll(OperationContext* opCtx, const std::string& reason) override;

    std::set<std::string> getNamesWithConflictingCasing(StringData name) override;

private:
    std::set<std::string> _getNamesWithConflictingCasing_inlock(StringData name);

    typedef StringMap<Database*> DBs;
    mutable SimpleMutex _m;
    DBs _dbs;
};
}  // namespace mongo