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Add OpenChain() to NullTransport so that BP5 can use it. #5047

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Merged
pnorbert merged 1 commit into from
May 22, 2026
Merged

Add OpenChain() to NullTransport so that BP5 can use it. #5047

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27 changes: 27 additions & 0 deletions source/adios2/toolkit/transport/null/NullTransport.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -44,6 +44,33 @@ void NullTransport::Open(const std::string &name, const Mode openMode, const boo
ProfilerStop("open");
}

void NullTransport::OpenChain(const std::string &name, Mode openMode, const helper::Comm &chainComm,
const bool async, const bool directio)
{
if (Impl->IsOpen)
{
helper::Throw<std::runtime_error>("Toolkit", "transport::NullTransport", "Open",
"transport is already open");
}

ProfilerStart("open");
int token = 1;
if (chainComm.Rank() > 0)
{
chainComm.Recv(&token, 1, chainComm.Rank() - 1, 0,
"Chain token in NullTransport::OpenChain");
}
Impl->IsOpen = true;
Impl->CurPos = 0;
Impl->Capacity = 0;
if (chainComm.Rank() < chainComm.Size() - 1)
{
chainComm.Isend(&token, 1, chainComm.Rank() + 1, 0,
"Sending Chain token in FilePOSIX::OpenChain");
}
ProfilerStop("open");
}

void NullTransport::SetBuffer(char *buffer, size_t size) { return; }

void NullTransport::Write(const char *buffer, size_t size, size_t start)
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3 changes: 3 additions & 0 deletions source/adios2/toolkit/transport/null/NullTransport.h
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Original file line number Diff line number Diff line change
Expand Up @@ -33,6 +33,9 @@ class NullTransport : public Transport
void Open(const std::string &name, const Mode openMode, const bool async = false,
const bool directio = false) override;

void OpenChain(const std::string &name, Mode openMode, const helper::Comm &chainComm,
const bool async = false, const bool directio = false) override;

void SetBuffer(char *buffer, size_t size) override;

void Write(const char *buffer, size_t size, size_t start = MaxSizeT) override;
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