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First version of the shared memory transport.

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Use via `--transport shmem` cmd option. No pub/sub.
This commit is contained in:
Alexey Rybalchenko
2016-06-03 11:24:12 +02:00
parent 6c3b01f09c
commit a332d9fc83
39 changed files with 2121 additions and 309 deletions
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81
fairmq/shmem/FairMQContextSHM.cxx Normal file
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/********************************************************************************
* Copyright (C) 2014 GSI Helmholtzzentrum fuer Schwerionenforschung GmbH *
* *
* This software is distributed under the terms of the *
* GNU Lesser General Public Licence version 3 (LGPL) version 3, *
* copied verbatim in the file "LICENSE" *
********************************************************************************/
#include <zmq.h>
#include <boost/interprocess/managed_shared_memory.hpp>
#include "FairMQLogger.h"
#include "FairMQContextSHM.h"
#include "FairMQShmManager.h"
using namespace FairMQ::shmem;
FairMQContextSHM::FairMQContextSHM(int numIoThreads)
: fContext()
{
fContext = zmq_ctx_new();
if (fContext == NULL)
{
LOG(ERROR) << "failed creating context, reason: " << zmq_strerror(errno);
exit(EXIT_FAILURE);
}
if (zmq_ctx_set(fContext, ZMQ_IO_THREADS, numIoThreads) != 0)
{
LOG(ERROR) << "failed configuring context, reason: " << zmq_strerror(errno);
}
// Set the maximum number of allowed sockets on the context.
if (zmq_ctx_set(fContext, ZMQ_MAX_SOCKETS, 10000) != 0)
{
LOG(ERROR) << "failed configuring context, reason: " << zmq_strerror(errno);
}
Manager::Instance().InitializeSegment("open_or_create", "FairMQSharedMemory", 2000000000);
LOG(INFO) << "Created/Opened shared memory segment of 2,000,000,000 bytes. Available are " << Manager::Instance().Segment()->get_free_memory() << " bytes.";
}
FairMQContextSHM::~FairMQContextSHM()
{
Close();
if (boost::interprocess::shared_memory_object::remove("FairMQSharedMemory"))
{
LOG(INFO) << "Successfully removed shared memory after the device has stopped.";
}
else
{
LOG(INFO) << "Did not remove shared memory after the device stopped. Still in use?";
}
}
void* FairMQContextSHM::GetContext()
{
return fContext;
}
void FairMQContextSHM::Close()
{
if (fContext == NULL)
{
return;
}
if (zmq_ctx_destroy(fContext) != 0)
{
if (errno == EINTR)
{
LOG(ERROR) << " failed closing context, reason: " << zmq_strerror(errno);
}
else
{
fContext = NULL;
return;
}
}
}