cet::sqlite::ConnectionFactory Class Reference

#include <ConnectionFactory.h>

Public Member Functions
template<typename DatabaseOpenPolicy = detail::DefaultDatabaseOpenPolicy, typename... PolicyArgs>
auto	make_connection (std::string const &file_name, PolicyArgs &&...) -> Connection *
template<typename DatabaseOpenPolicy , typename... PolicyArgs>
auto	make_connection (std::string const &filename, PolicyArgs &&...policyArgs) -> Connection *

Private Attributes
std::map< std::string, std::weak_ptr< std::recursive_mutex > >	databaseLocks_
std::recursive_mutex	mutex_

Detailed Description

Definition at line 43 of file ConnectionFactory.h.

Member Function Documentation

template<typename DatabaseOpenPolicy = detail::DefaultDatabaseOpenPolicy, typename... PolicyArgs>

auto cet::sqlite::ConnectionFactory::make_connection	(	std::string const &	file_name,
		PolicyArgs &&	...
	)		-> Connection *

template<typename DatabaseOpenPolicy , typename... PolicyArgs>

auto cet::sqlite::ConnectionFactory::make_connection	(	std::string const &	filename,
		PolicyArgs &&...	policyArgs
	)		-> Connection*

Definition at line 57 of file ConnectionFactory.h.

  {
    // Implementation a la Herb Sutter's favorite 10-liner
    std::lock_guard sentry{mutex_};
    // Note: Convert the weak_ptr to a shared_ptr using the member
    // function lock(), this is not an operation on the mutex.
    auto shared_ptr_to_mutex = databaseLocks_[filename].lock();
    if (!shared_ptr_to_mutex) {
      using namespace std::string_literals;
      databaseLocks_[filename] = shared_ptr_to_mutex =
        std::make_shared<std::recursive_mutex>();
    }
    auto ret = new Connection{
      filename,
      shared_ptr_to_mutex,
      DatabaseOpenPolicy{std::forward<PolicyArgs>(policyArgs)...}};
    return ret;
  }

Member Data Documentation

std::map<std::string, std::weak_ptr<std::recursive_mutex> > cet::sqlite::ConnectionFactory::databaseLocks_

private

Definition at line 51 of file ConnectionFactory.h.

std::recursive_mutex cet::sqlite::ConnectionFactory::mutex_

private

Definition at line 52 of file ConnectionFactory.h.

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The documentation for this class was generated from the following file:

• cetlib/cetlib/sqlite/ConnectionFactory.h