mirror of
https://github.com/XRPLF/rippled.git
synced 2025-11-04 19:25:51 +00:00
1d42c4f6de
Per XLS-0095, we are taking steps to rename ripple(d) to xrpl(d). This change specifically removes all copyright notices referencing Ripple, XRPLF, and certain affiliated contributors upon mutual agreement, so the notice in the LICENSE.md file applies throughout. Copyright notices referencing external contributions remain as-is. Duplicate verbiage is also removed.
115 lines
2.1 KiB
C++
115 lines
2.1 KiB
C++
#ifndef XRPL_BASICS_LOCALVALUE_H_INCLUDED
|
|
#define XRPL_BASICS_LOCALVALUE_H_INCLUDED
|
|
|
|
#include <boost/thread/tss.hpp>
|
|
|
|
#include <memory>
|
|
#include <unordered_map>
|
|
|
|
namespace ripple {
|
|
|
|
namespace detail {
|
|
|
|
struct LocalValues
|
|
{
|
|
explicit LocalValues() = default;
|
|
|
|
bool onCoro = true;
|
|
|
|
struct BasicValue
|
|
{
|
|
virtual ~BasicValue() = default;
|
|
virtual void*
|
|
get() = 0;
|
|
};
|
|
|
|
template <class T>
|
|
struct Value : BasicValue
|
|
{
|
|
T t_;
|
|
|
|
Value() = default;
|
|
explicit Value(T const& t) : t_(t)
|
|
{
|
|
}
|
|
|
|
void*
|
|
get() override
|
|
{
|
|
return &t_;
|
|
}
|
|
};
|
|
|
|
// Keys are the address of a LocalValue.
|
|
std::unordered_map<void const*, std::unique_ptr<BasicValue>> values;
|
|
|
|
static inline void
|
|
cleanup(LocalValues* lvs)
|
|
{
|
|
if (lvs && !lvs->onCoro)
|
|
delete lvs;
|
|
}
|
|
};
|
|
|
|
template <class = void>
|
|
boost::thread_specific_ptr<detail::LocalValues>&
|
|
getLocalValues()
|
|
{
|
|
static boost::thread_specific_ptr<detail::LocalValues> tsp(
|
|
&detail::LocalValues::cleanup);
|
|
return tsp;
|
|
}
|
|
|
|
} // namespace detail
|
|
|
|
template <class T>
|
|
class LocalValue
|
|
{
|
|
public:
|
|
template <class... Args>
|
|
LocalValue(Args&&... args) : t_(std::forward<Args>(args)...)
|
|
{
|
|
}
|
|
|
|
/** Stores instance of T specific to the calling coroutine or thread. */
|
|
T&
|
|
operator*();
|
|
|
|
/** Stores instance of T specific to the calling coroutine or thread. */
|
|
T*
|
|
operator->()
|
|
{
|
|
return &**this;
|
|
}
|
|
|
|
private:
|
|
T t_;
|
|
};
|
|
|
|
template <class T>
|
|
T&
|
|
LocalValue<T>::operator*()
|
|
{
|
|
auto lvs = detail::getLocalValues().get();
|
|
if (!lvs)
|
|
{
|
|
lvs = new detail::LocalValues();
|
|
lvs->onCoro = false;
|
|
detail::getLocalValues().reset(lvs);
|
|
}
|
|
else
|
|
{
|
|
auto const iter = lvs->values.find(this);
|
|
if (iter != lvs->values.end())
|
|
return *reinterpret_cast<T*>(iter->second->get());
|
|
}
|
|
|
|
return *reinterpret_cast<T*>(
|
|
lvs->values
|
|
.emplace(this, std::make_unique<detail::LocalValues::Value<T>>(t_))
|
|
.first->second->get());
|
|
}
|
|
} // namespace ripple
|
|
|
|
#endif
|