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ENH: support UOPstream and UIPstream as formatters with an external buffer

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- can split serialise/de-serialise and send/recv actions
This commit is contained in:
Mark Olesen
2023-02-08 17:13:44 +01:00
parent 70d310329c
commit add61ca273
11 changed files with 378 additions and 44 deletions
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43
src/OpenFOAM/db/IOstreams/Pstreams/UIPstreamBase.C
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@ -159,12 +159,13 @@ Foam::UIPstreamBase::UIPstreamBase
UPstream(commsType),
Istream(fmt),
fromProcNo_(fromProcNo),
recvBuf_(receiveBuf),
recvBufPos_(receiveBufPosition),
tag_(tag),
comm_(comm),
messageSize_(0),
storedRecvBufPos_(0),
clearAtEnd_(clearAtEnd),
messageSize_(0)
recvBuf_(receiveBuf),
recvBufPos_(receiveBufPosition)
{
setOpened();
setGood();
@ -180,12 +181,13 @@ Foam::UIPstreamBase::UIPstreamBase
UPstream(buffers.commsType()),
Istream(buffers.format()),
fromProcNo_(fromProcNo),
recvBuf_(buffers.accessRecvBuffer(fromProcNo)),
recvBufPos_(buffers.accessRecvPosition(fromProcNo)),
tag_(buffers.tag()),
comm_(buffers.comm()),
messageSize_(0),
storedRecvBufPos_(0),
clearAtEnd_(buffers.allowClearRecv()),
messageSize_(0)
recvBuf_(buffers.accessRecvBuffer(fromProcNo)),
recvBufPos_(buffers.accessRecvPosition(fromProcNo))
{
if
(
@ -205,6 +207,32 @@ Foam::UIPstreamBase::UIPstreamBase
}
Foam::UIPstreamBase::UIPstreamBase
(
const DynamicList<char>& receiveBuf,
IOstreamOption::streamFormat fmt
)
:
UPstream(UPstream::commsTypes::nonBlocking), // placeholder
Istream(fmt),
fromProcNo_(UPstream::masterNo()), // placeholder
tag_(UPstream::msgType()), // placeholder
comm_(UPstream::selfComm), // placeholder
messageSize_(receiveBuf.size()), // Message == buffer
storedRecvBufPos_(0),
clearAtEnd_(false), // Do not clear recvBuf if at end!!
recvBuf_
(
// The receive buffer is never modified with this code path
const_cast<DynamicList<char>&>(receiveBuf)
),
recvBufPos_(storedRecvBufPos_) // Internal reference
{
setOpened();
setGood();
}
// * * * * * * * * * * * * * * * * Destructor * * * * * * * * * * * * * * * //
Foam::UIPstreamBase::~UIPstreamBase()
@ -517,8 +545,7 @@ void Foam::UIPstreamBase::print(Ostream& os) const
{
os << "Reading from processor " << fromProcNo_
<< " using communicator " << comm_
<< " and tag " << tag_
<< Foam::endl;
<< " and tag " << tag_ << Foam::endl;
}