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DataRefUtils.cxx
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43 lines (41 loc) · 1.6 KB
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// Copyright 2019-2020 CERN and copyright holders of ALICE O2.
// See https://alice-o2.web.cern.ch/copyright for details of the copyright holders.
// All rights not expressly granted are reserved.
//
// This software is distributed under the terms of the GNU General Public
// License v3 (GPL Version 3), copied verbatim in the file "COPYING".
//
// In applying this license CERN does not waive the privileges and immunities
// granted to it by virtue of its status as an Intergovernmental Organization
// or submit itself to any jurisdiction.
#include <typeinfo>
#include "CCDB/CcdbApi.h"
#include "Framework/DataRefUtils.h"
#include <TMemFile.h>
#include <TError.h>
#include "Framework/RuntimeError.h"
namespace o2::framework
{
// Adapted from CcdbApi private method interpretAsTMemFileAndExtract
// If the former is moved to public, throws on error and could be changed to
// not require a mutex we could use it.
void* DataRefUtils::decodeCCDB(DataRef const& ref, std::type_info const& tinfo)
{
void* result = nullptr;
Int_t previousErrorLevel = gErrorIgnoreLevel;
gErrorIgnoreLevel = kFatal;
auto* dh = o2::header::get<o2::header::DataHeader*>(ref.header);
TMemFile memFile("name", const_cast<char*>(ref.payload), dh->payloadSize, "READ");
gErrorIgnoreLevel = previousErrorLevel;
if (memFile.IsZombie()) {
return nullptr;
}
TClass* tcl = TClass::GetClass(tinfo);
result = ccdb::CcdbApi::extractFromTFile(memFile, tcl);
if (!result) {
throw runtime_error_f("Couldn't retrieve object corresponding to %s from TFile", tcl->GetName());
}
memFile.Close();
return result;
}
} // namespace o2::framework