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// -*- C++ -*-
//
// Package: Common
// Class : PtrVectorBase
//
// Implementation:
// <Notes on implementation>
//
// Original Author: Chris Jones
// Created: Wed Oct 24 15:49:27 EDT 2007
//
// user include files
#include "DataFormats/Common/interface/WrapperBase.h"
#include "DataFormats/Common/interface/PtrVectorBase.h"
#include "DataFormats/Common/interface/traits.h"
#include "DataFormats/Common/interface/EDProductGetter.h"
#include "FWCore/Utilities/interface/EDMException.h"
#include "FWCore/Utilities/interface/Exception.h"
// system include files
#include <ostream>
//
// constants, enums and typedefs
//
namespace edm {
//
// static data member definitions
//
//
// constructor and destructor
//
PtrVectorBase::PtrVectorBase() : cachedItems_(nullptr) {}
PtrVectorBase::~PtrVectorBase() { delete cachedItems_.load(); }
PtrVectorBase::PtrVectorBase(const PtrVectorBase& iOther)
: core_(iOther.core_), indicies_(iOther.indicies_), cachedItems_(nullptr) {
auto cache = iOther.cachedItems_.load();
if (cache) {
cachedItems_.store(new std::vector<void const*>(*cache));
}
}
//
// assignment operators
//
//
// member functions
//
/// swap
void PtrVectorBase::swap(PtrVectorBase& other) {
core_.swap(other.core_);
indicies_.swap(other.indicies_);
other.cachedItems_.store(cachedItems_.exchange(other.cachedItems_.load()));
}
void PtrVectorBase::push_back_base(RefCore const& core, key_type iKey, void const* iData) {
core_.pushBackItem(core, false);
//Did we already push a 'non-cached' Ptr into the container or is this a 'non-cached' Ptr?
if (not cachedItems_ and indicies_.empty()) {
cachedItems_.store(new std::vector<void const*>());
(*cachedItems_).reserve(indicies_.capacity());
}
auto tmpCachedItems = cachedItems_.load();
if (tmpCachedItems and (indicies_.size() == (*tmpCachedItems).size())) {
if (iData) {
tmpCachedItems->push_back(iData);
} else if (key_traits<key_type>::value == iKey) {
tmpCachedItems->push_back(nullptr);
} else {
delete tmpCachedItems;
cachedItems_.store(nullptr);
}
}
indicies_.push_back(iKey);
}
bool PtrVectorBase::isAvailable() const {
if (indicies_.empty()) {
return core_.isAvailable();
}
if (!hasCache()) {
if (!id().isValid() || productGetter() == nullptr) {
return false;
}
getProduct_();
}
auto tmpCachedItems = cachedItems_.load();
for (auto ptr : *tmpCachedItems) {
if (ptr == nullptr) {
return false;
}
}
return true;
}
//
// const member functions
//
void PtrVectorBase::getProduct_() const {
if (hasCache()) {
return;
}
if (indicies_.empty()) {
return;
}
//NOTE: Another thread could be getting the data
auto tmpProductGetter = productGetter();
if (nullptr == tmpProductGetter) {
throw Exception(errors::LogicError) << "Tried to get data for a PtrVector which has no EDProductGetter\n";
}
WrapperBase const* product = tmpProductGetter->getIt(id());
auto tmpCachedItems = std::make_unique<std::vector<void const*>>();
if (product != nullptr) {
product->fillPtrVector(typeInfo(), indicies_, *tmpCachedItems);
std::vector<void const*>* expected = nullptr;
if (cachedItems_.compare_exchange_strong(expected, tmpCachedItems.get())) {
//we were the first thread to change the value
tmpCachedItems.release();
}
return;
}
tmpCachedItems->resize(indicies_.size(), nullptr);
std::vector<unsigned int> thinnedKeys;
thinnedKeys.assign(indicies_.begin(), indicies_.end());
std::vector<WrapperBase const*> wrappers(indicies_.size(), nullptr);
tmpProductGetter->getThinnedProducts(id(), wrappers, thinnedKeys);
unsigned int nWrappers = wrappers.size();
assert(wrappers.size() == indicies_.size());
assert(wrappers.size() == tmpCachedItems->size());
for (unsigned k = 0; k < nWrappers; ++k) {
if (wrappers[k] != nullptr) {
wrappers[k]->setPtr(typeInfo(), thinnedKeys[k], (*tmpCachedItems)[k]);
}
}
{
std::vector<void const*>* expected = nullptr;
if (cachedItems_.compare_exchange_strong(expected, tmpCachedItems.get())) {
//we were the first thread to change the value
tmpCachedItems.release();
}
}
}
bool PtrVectorBase::checkCachedItems() const {
auto tmp = cachedItems_.load();
if (not tmp) {
return false;
}
for (auto item : *tmp) {
if (item == nullptr) {
throw Exception(errors::InvalidReference)
<< "Asked for data from a PtrVector which refers to a non-existent product with ProductID " << id() << "\n";
}
}
return true;
}
bool PtrVectorBase::operator==(PtrVectorBase const& iRHS) const {
if (core_ != iRHS.core_) {
return false;
}
if (indicies_.size() != iRHS.indicies_.size()) {
return false;
}
return std::equal(indicies_.begin(), indicies_.end(), iRHS.indicies_.begin());
}
//
// static member functions
//
static const std::vector<void const*> s_emptyCache{};
const std::vector<void const*>& PtrVectorBase::emptyCache() { return s_emptyCache; }
} // namespace edm
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