mirror of
https://github.com/FairRootGroup/FairMQ.git
synced 2025-10-13 08:41:16 +00:00
128 lines
3.7 KiB
C++
128 lines
3.7 KiB
C++
/********************************************************************************
|
|
* Copyright (C) 2014 GSI Helmholtzzentrum fuer Schwerionenforschung GmbH *
|
|
* *
|
|
* This software is distributed under the terms of the *
|
|
* GNU Lesser General Public Licence (LGPL) version 3, *
|
|
* copied verbatim in the file "LICENSE" *
|
|
********************************************************************************/
|
|
#ifndef FAIR_MQ_SHMEM_COMMON_H_
|
|
#define FAIR_MQ_SHMEM_COMMON_H_
|
|
|
|
#include <picosha2.h>
|
|
|
|
#include <atomic>
|
|
#include <string>
|
|
|
|
#include <boost/interprocess/managed_shared_memory.hpp>
|
|
#include <boost/interprocess/allocators/allocator.hpp>
|
|
#include <boost/interprocess/containers/map.hpp>
|
|
#include <boost/interprocess/containers/string.hpp>
|
|
#include <boost/interprocess/containers/vector.hpp>
|
|
#include <boost/functional/hash.hpp>
|
|
|
|
#include <unistd.h>
|
|
#include <sys/types.h>
|
|
|
|
namespace fair
|
|
{
|
|
namespace mq
|
|
{
|
|
namespace shmem
|
|
{
|
|
|
|
using SegmentManager = boost::interprocess::managed_shared_memory::segment_manager;
|
|
using VoidAlloc = boost::interprocess::allocator<void, SegmentManager>;
|
|
using CharAlloc = boost::interprocess::allocator<char, SegmentManager>;
|
|
using Str = boost::interprocess::basic_string<char, std::char_traits<char>, CharAlloc>;
|
|
using StrAlloc = boost::interprocess::allocator<Str, SegmentManager>;
|
|
using StrVector = boost::interprocess::vector<Str, StrAlloc>;
|
|
|
|
struct RegionInfo
|
|
{
|
|
RegionInfo(const VoidAlloc& alloc)
|
|
: fPath("", alloc)
|
|
, fFlags(0)
|
|
, fUserFlags(0)
|
|
, fDestroyed(false)
|
|
{}
|
|
|
|
RegionInfo(const char* path, const int flags, const uint64_t userFlags, const VoidAlloc& alloc)
|
|
: fPath(path, alloc)
|
|
, fFlags(flags)
|
|
, fUserFlags(userFlags)
|
|
, fDestroyed(false)
|
|
{}
|
|
|
|
Str fPath;
|
|
int fFlags;
|
|
uint64_t fUserFlags;
|
|
bool fDestroyed;
|
|
};
|
|
|
|
using Uint64RegionInfoPairAlloc = boost::interprocess::allocator<std::pair<const uint64_t, RegionInfo>, SegmentManager>;
|
|
using Uint64RegionInfoMap = boost::interprocess::map<uint64_t, RegionInfo, std::less<uint64_t>, Uint64RegionInfoPairAlloc>;
|
|
|
|
struct DeviceCounter
|
|
{
|
|
DeviceCounter(unsigned int c)
|
|
: fCount(c)
|
|
{}
|
|
|
|
std::atomic<unsigned int> fCount;
|
|
};
|
|
|
|
struct RegionCounter
|
|
{
|
|
RegionCounter(uint64_t c)
|
|
: fCount(c)
|
|
{}
|
|
|
|
std::atomic<uint64_t> fCount;
|
|
};
|
|
|
|
struct MetaHeader
|
|
{
|
|
size_t fSize;
|
|
size_t fRegionId;
|
|
size_t fHint;
|
|
boost::interprocess::managed_shared_memory::handle_t fHandle;
|
|
};
|
|
|
|
struct RegionBlock
|
|
{
|
|
RegionBlock()
|
|
: fHandle()
|
|
, fSize(0)
|
|
, fHint(0)
|
|
{}
|
|
|
|
RegionBlock(boost::interprocess::managed_shared_memory::handle_t handle, size_t size, size_t hint)
|
|
: fHandle(handle)
|
|
, fSize(size)
|
|
, fHint(hint)
|
|
{}
|
|
|
|
boost::interprocess::managed_shared_memory::handle_t fHandle;
|
|
size_t fSize;
|
|
size_t fHint;
|
|
};
|
|
|
|
// find id for unique shmem name:
|
|
// a hash of user id + session id, truncated to 8 characters (to accommodate for name size limit on some systems (MacOS)).
|
|
inline std::string buildShmIdFromSessionIdAndUserId(const std::string& sessionId)
|
|
{
|
|
std::string seed((std::to_string(geteuid()) + sessionId));
|
|
// generate a 8-digit hex value out of sha256 hash
|
|
std::vector<unsigned char> hash(4);
|
|
picosha2::hash256(seed.begin(), seed.end(), hash.begin(), hash.end());
|
|
std::string shmId = picosha2::bytes_to_hex_string(hash.begin(), hash.end());
|
|
|
|
return shmId;
|
|
}
|
|
|
|
} // namespace shmem
|
|
} // namespace mq
|
|
} // namespace fair
|
|
|
|
#endif /* FAIR_MQ_SHMEM_COMMON_H_ */
|