epics::pvData::FieldCreate::Helper Struct Reference

Static Public Member Functions
template<typename FLD >
static void	cache (const FieldCreate *create, std::tr1::shared_ptr< FLD > &ent)

Detailed Description

Definition at line 51 of file FieldCreateFactory.cpp.

Member Function Documentation

template<typename FLD >

static void epics::pvData::FieldCreate::Helper::cache ( const FieldCreate *  create, std::tr1::shared_ptr< FLD > &  ent  )

inlinestatic

Definition at line 53 of file FieldCreateFactory.cpp.

                                                                             {
        unsigned hash = Field::Helper::hash(ent.get());

        Lock G(create->mutex);
        // we examine raw pointers stored in create->cache, which is safe under create->mutex

        std::pair<cache_t::iterator, cache_t::iterator> itp(create->cache.equal_range(hash));
        for(; itp.first!=itp.second; ++itp.first) {
            Field* cent(itp.first->second);
            FLD* centx(dynamic_cast<FLD*>(cent));
            if(centx && compare(*centx, *ent)) {
                try{
                    ent = std::tr1::static_pointer_cast<FLD>(cent->shared_from_this());
                    return;
                }catch(std::tr1::bad_weak_ptr&){
                    // we're racing destruction.
                    // add a new entry.
                    // Field::~Field is in the process of removing this old one.
                    continue;
                }
            }
        }

        create->cache.insert(std::make_pair(hash, ent.get()));
        // cache cleaned from Field::~Field
    }

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

• modules/pvData/src/factory/FieldCreateFactory.cpp