blob: f70bb37c302df657a44d77e0e1f493378b99ddc2 [file] [log] [blame]
#include "sdbusplus/server/transaction.hpp"
namespace sdbusplus
{
namespace server
{
namespace transaction
{
namespace details
{
// Transaction Id
thread_local uint64_t id = 0;
} // namespace details
uint64_t get_id()
{
// If the transaction id has not been initialized, generate one.
if (!details::id)
{
details::Transaction t;
details::id = std::hash<details::Transaction>{}(t);
}
return details::id;
}
void set_id(uint64_t value)
{
details::id = value;
}
void set_id(message_t& msg)
{
auto tbus = msg.get_bus();
auto t = Transaction(tbus, msg);
set_id(std::hash<Transaction>{}(t));
}
} // namespace transaction
} // namespace server
} // namespace sdbusplus
namespace std
{
size_t hash<sdbusplus::bus_t>::operator()(sdbusplus::bus_t& b) const
{
auto name = b.get_unique_name();
return std::hash<std::string>{}(name);
}
size_t hash<sdbusplus::message_t>::operator()(sdbusplus::message_t& m) const
{
switch (m.get_type())
{
// Reply messages will always embed the cookie of the original
// message in a separate location. We want to use this cookie
// to correlate messages as one transaction.
case SD_BUS_MESSAGE_METHOD_RETURN:
case SD_BUS_MESSAGE_METHOD_ERROR:
return std::hash<uint64_t>{}(m.get_reply_cookie());
// Method calls will have the cookie in the header when sealed.
// Since we are on the server side that should always be the case.
case SD_BUS_MESSAGE_METHOD_CALL:
return std::hash<uint64_t>{}(m.get_cookie());
// Outgoing signals don't have a cookie so we need to use
// something else as an id. Just use a monotonic unique one.
case SD_BUS_MESSAGE_SIGNAL:
return std::hash<uint64_t>{}(
std::chrono::steady_clock::now().time_since_epoch().count());
default:
throw std::runtime_error("hash message: Unknown message type");
}
}
size_t hash<sdbusplus::server::transaction::Transaction>::operator()(
sdbusplus::server::transaction::Transaction const& t) const
{
auto hash1 = std::hash<sdbusplus::bus_t>{}(t.bus);
auto hash2 = std::hash<sdbusplus::message_t>{}(t.msg);
// boost::hash_combine() algorithm.
return static_cast<size_t>(
hash1 ^ (hash2 + 0x9e3779b9 + (hash1 << 6) + (hash1 >> 2)));
}
size_t hash<sdbusplus::server::transaction::details::Transaction>::operator()(
sdbusplus::server::transaction::details::Transaction const& t) const
{
auto hash1 = std::hash<int>{}(t.time);
auto hash2 = std::hash<std::thread::id>{}(t.thread);
// boost::hash_combine() algorithm.
return static_cast<size_t>(
hash1 ^ (hash2 + 0x9e3779b9 + (hash1 << 6) + (hash1 >> 2)));
}
} // namespace std