File indexing completed on 2024-04-06 12:13:08
0001 #ifndef FWCore_SharedMemory_ROOTDeserializer_h
0002 #define FWCore_SharedMemory_ROOTDeserializer_h
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0022 #include "TClass.h"
0023 #include "TBufferFile.h"
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0029 namespace edm::shared_memory {
0030 template <typename T, typename READBUFFER>
0031 class ROOTDeserializer {
0032 public:
0033 ROOTDeserializer(READBUFFER& iBuffer)
0034 : buffer_{iBuffer}, class_{TClass::GetClass(typeid(T))}, bufferFile_(TBuffer::kRead) {}
0035
0036 ROOTDeserializer(const ROOTDeserializer&) = delete;
0037 const ROOTDeserializer& operator=(const ROOTDeserializer&) = delete;
0038 ROOTDeserializer(ROOTDeserializer&&) = delete;
0039 const ROOTDeserializer& operator=(ROOTDeserializer&&) = delete;
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0044 T deserialize() {
0045 T value;
0046 if (previousBufferIdentifier_ != buffer_.bufferIdentifier()) {
0047 auto buff = buffer_.buffer();
0048 bufferFile_.SetBuffer(buff.first, buff.second, kFALSE);
0049 previousBufferIdentifier_ = buffer_.bufferIdentifier();
0050 }
0051
0052 class_->ReadBuffer(bufferFile_, &value);
0053 bufferFile_.Reset();
0054 return value;
0055 }
0056
0057 private:
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0059 READBUFFER& buffer_;
0060 TClass* const class_;
0061 TBufferFile bufferFile_;
0062 int previousBufferIdentifier_ = 0;
0063 };
0064 }
0065
0066 #endif