# FairMQ: fairmq/shmem/Manager.h Source File

Manager.h
/********************************************************************************
* 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_MANAGER_H_
#define FAIR_MQ_SHMEM_MANAGER_H_
#include "Common.h"
#include "Region.h"
#include "Monitor.h"
#include <FairMQLogger.h>
#include <FairMQMessage.h>
#include <fairmq/ProgOptions.h>
#include <fairmq/tools/Strings.h>
#include <boost/date_time/posix_time/posix_time.hpp>
#include <boost/filesystem.hpp>
#include <boost/interprocess/ipc/message_queue.hpp>
#include <boost/interprocess/managed_shared_memory.hpp>
#include <boost/interprocess/sync/named_condition.hpp>
#include <boost/interprocess/sync/named_mutex.hpp>
#include <boost/process.hpp>
#include <boost/variant.hpp>
#include <cstdlib> // getenv
#include <condition_variable>
#include <memory> // make_unique
#include <mutex>
#include <set>
#include <sstream>
#include <stdexcept>
#include <string>
#include <thread>
#include <unordered_map>
#include <utility> // pair
#include <vector>
#include <sys/mman.h> // mlock
namespace fair::mq::shmem
{
class Manager
{
public:
Manager(std::string shmId, std::string deviceId, size_t size, const ProgOptions* config)
: fShmId(std::move(shmId))
, fSegmentId(config ? config->GetProperty<uint16_t>("shm-segment-id", 0) : 0)
, fDeviceId(std::move(deviceId))
, fSegments()
, fManagementSegment(boost::interprocess::open_or_create, std::string("fmq_" + fShmId + "_mng").c_str(), 6553600)
, fShmVoidAlloc(fManagementSegment.get_segment_manager())
, fShmMtx(boost::interprocess::open_or_create, std::string("fmq_" + fShmId + "_mtx").c_str())
, fRegionEventsCV(boost::interprocess::open_or_create, std::string("fmq_" + fShmId + "_cv").c_str())
, fRegionEventsSubscriptionActive(false)
, fNumObservedEvents(0)
, fDeviceCounter(nullptr)
, fEventCounter(nullptr)
, fShmSegments(nullptr)
, fShmRegions(nullptr)
, fInterrupted(false)
, fMsgCounter(0)
#ifdef FAIRMQ_DEBUG_MODE
, fMsgDebug(nullptr)
, fShmMsgCounters(nullptr)
#endif
, fHeartbeatThread()
, fSendHeartbeats(true)
, fThrowOnBadAlloc(config ? config->GetProperty<bool>("shm-throw-bad-alloc", true) : true)
, fNoCleanup(config ? config->GetProperty<bool>("shm-no-cleanup", false) : false)
{
using namespace boost::interprocess;
bool mlockSegment = false;
bool zeroSegment = false;
bool autolaunchMonitor = false;
std::string allocationAlgorithm("rbtree_best_fit");
if (config) {
mlockSegment = config->GetProperty<bool>("shm-mlock-segment", mlockSegment);
zeroSegment = config->GetProperty<bool>("shm-zero-segment", zeroSegment);
autolaunchMonitor = config->GetProperty<bool>("shm-monitor", autolaunchMonitor);
allocationAlgorithm = config->GetProperty<std::string>("shm-allocation", allocationAlgorithm);
} else {
LOG(debug) << "ProgOptions not available! Using defaults.";
}
if (autolaunchMonitor) {
StartMonitor(fShmId);
}
{
std::stringstream ss;
boost::interprocess::scoped_lock<boost::interprocess::named_mutex> lock(fShmMtx);
fShmSegments = fManagementSegment.find_or_construct<Uint16SegmentInfoHashMap>(unique_instance)(fShmVoidAlloc);
fEventCounter = fManagementSegment.find<EventCounter>(unique_instance).first;
if (fEventCounter) {
LOG(debug) << "event counter found: " << fEventCounter->fCount;
} else {
LOG(debug) << "no event counter found, creating one and initializing with 0";
fEventCounter = fManagementSegment.construct<EventCounter>(unique_instance)(0);
LOG(debug) << "initialized event counter with: " << fEventCounter->fCount;
}
try {
auto it = fShmSegments->find(fSegmentId);
if (it == fShmSegments->end()) {
// no segment with given id exists, creating
if (allocationAlgorithm == "rbtree_best_fit") {
fSegments.emplace(fSegmentId, RBTreeBestFitSegment(create_only, std::string("fmq_" + fShmId + "_m_" + std::to_string(fSegmentId)).c_str(), size));
fShmSegments->emplace(fSegmentId, AllocationAlgorithm::rbtree_best_fit);
} else if (allocationAlgorithm == "simple_seq_fit") {
fSegments.emplace(fSegmentId, SimpleSeqFitSegment(create_only, std::string("fmq_" + fShmId + "_m_" + std::to_string(fSegmentId)).c_str(), size));
fShmSegments->emplace(fSegmentId, AllocationAlgorithm::simple_seq_fit);
}
ss << "Created ";
(fEventCounter->fCount)++;
} else {
// found segment with the given id, opening
if (it->second.fAllocationAlgorithm == AllocationAlgorithm::rbtree_best_fit) {
fSegments.emplace(fSegmentId, RBTreeBestFitSegment(open_only, std::string("fmq_" + fShmId + "_m_" + std::to_string(fSegmentId)).c_str()));
if (allocationAlgorithm != "rbtree_best_fit") {
LOG(warn) << "Allocation algorithm of the opened segment is rbtree_best_fit, but requested is " << allocationAlgorithm << ". Ignoring requested setting.";
allocationAlgorithm = "rbtree_best_fit";
}
} else {
fSegments.emplace(fSegmentId, SimpleSeqFitSegment(open_only, std::string("fmq_" + fShmId + "_m_" + std::to_string(fSegmentId)).c_str()));
if (allocationAlgorithm != "simple_seq_fit") {
LOG(warn) << "Allocation algorithm of the opened segment is simple_seq_fit, but requested is " << allocationAlgorithm << ". Ignoring requested setting.";
allocationAlgorithm = "simple_seq_fit";
}
}
ss << "Opened ";
}
ss << "shared memory segment '" << "fmq_" << fShmId << "_m_" << fSegmentId << "'."
<< " Size: " << boost::apply_visitor(SegmentSize{}, fSegments.at(fSegmentId)) << " bytes."
<< " Available: " << boost::apply_visitor(SegmentFreeMemory{}, fSegments.at(fSegmentId)) << " bytes."
<< " Allocation algorithm: " << allocationAlgorithm;
LOG(debug) << ss.str();
} catch(interprocess_exception& bie) {
LOG(error) << "Failed to create/open shared memory segment (" << "fmq_" << fShmId << "_m_" << fSegmentId << "): " << bie.what();
throw std::runtime_error(tools::ToString("Failed to create/open shared memory segment (", "fmq_", fShmId, "_m_", fSegmentId, "): ", bie.what()));
}
if (mlockSegment) {
LOG(debug) << "Locking the managed segment memory pages...";
if (mlock(boost::apply_visitor(SegmentAddress{}, fSegments.at(fSegmentId)), boost::apply_visitor(SegmentSize{}, fSegments.at(fSegmentId))) == -1) {
LOG(error) << "Could not lock the managed segment memory. Code: " << errno << ", reason: " << strerror(errno);
}
LOG(debug) << "Successfully locked the managed segment memory pages.";
}
if (zeroSegment) {
LOG(debug) << "Zeroing the managed segment free memory...";
boost::apply_visitor(SegmentMemoryZeroer{}, fSegments.at(fSegmentId));
LOG(debug) << "Successfully zeroed the managed segment free memory.";
}
fShmRegions = fManagementSegment.find_or_construct<Uint16RegionInfoHashMap>(unique_instance)(fShmVoidAlloc);
fDeviceCounter = fManagementSegment.find<DeviceCounter>(unique_instance).first;
if (fDeviceCounter) {
LOG(debug) << "device counter found, with value of " << fDeviceCounter->fCount << ". incrementing.";
(fDeviceCounter->fCount)++;
LOG(debug) << "incremented device counter, now: " << fDeviceCounter->fCount;
} else {
LOG(debug) << "no device counter found, creating one and initializing with 1";
fDeviceCounter = fManagementSegment.construct<DeviceCounter>(unique_instance)(1);
LOG(debug) << "initialized device counter with: " << fDeviceCounter->fCount;
}
#ifdef FAIRMQ_DEBUG_MODE
fMsgDebug = fManagementSegment.find_or_construct<Uint16MsgDebugMapHashMap>(unique_instance)(fShmVoidAlloc);
fShmMsgCounters = fManagementSegment.find_or_construct<Uint16MsgCounterHashMap>(unique_instance)(fShmVoidAlloc);
#endif
}
fHeartbeatThread = std::thread(&Manager::SendHeartbeats, this);
}
Manager() = delete;
Manager(const Manager&) = delete;
Manager operator=(const Manager&) = delete;
static void StartMonitor(const std::string& id)
{
using namespace boost::interprocess;
try {
named_mutex monitorStatus(open_only, std::string("fmq_" + id + "_ms").c_str());
LOG(debug) << "Found fairmq-shmmonitor for shared memory id " << id;
} catch (interprocess_exception&) {
LOG(debug) << "no fairmq-shmmonitor found for shared memory id " << id << ", starting...";
auto env = boost::this_process::environment();
std::vector<boost::filesystem::path> ownPath = boost::this_process::path();
if (const char* fmqp = getenv("FAIRMQ_PATH")) {
ownPath.insert(ownPath.begin(), boost::filesystem::path(fmqp));
}
boost::filesystem::path p = boost::process::search_path("fairmq-shmmonitor", ownPath);
if (!p.empty()) {
boost::process::spawn(p, "-x", "--shmid", id, "-d", "-t", "2000", env);
int numTries = 0;
do {
try {
named_mutex monitorStatus(open_only, std::string("fmq_" + id + "_ms").c_str());
LOG(debug) << "Started fairmq-shmmonitor for shared memory id " << id;
break;
} catch (interprocess_exception&) {
std::this_thread::sleep_for(std::chrono::milliseconds(10));
if (++numTries > 1000) {
LOG(error) << "Did not get response from fairmq-shmmonitor after " << 10 * 1000 << " milliseconds. Exiting.";
throw std::runtime_error(tools::ToString("Did not get response from fairmq-shmmonitor after ", 10 * 1000, " milliseconds. Exiting."));
}
}
} while (true);
} else {
LOG(warn) << "could not find fairmq-shmmonitor in the path";
}
}
}
void Interrupt() { fInterrupted.store(true); }
void Resume() { fInterrupted.store(false); }
void Reset()
{
if (fMsgCounter.load() != 0) {
LOG(error) << "Message counter during Reset expected to be 0, found: " << fMsgCounter.load();
throw MessageError(tools::ToString("Message counter during Reset expected to be 0, found: ", fMsgCounter.load()));
}
}
bool Interrupted() { return fInterrupted.load(); }
std::pair<boost::interprocess::mapped_region*, uint16_t> CreateRegion(const size_t size,
const int64_t userFlags,
RegionCallback callback,
RegionBulkCallback bulkCallback,
const std::string& path = "",
int flags = 0)
{
using namespace boost::interprocess;
try {
std::pair<mapped_region*, uint16_t> result;
{
uint16_t id = 0;
boost::interprocess::scoped_lock<boost::interprocess::named_mutex> lock(fShmMtx);
RegionCounter* rc = fManagementSegment.find<RegionCounter>(unique_instance).first;
if (rc) {
LOG(debug) << "region counter found, with value of " << rc->fCount << ". incrementing.";
(rc->fCount)++;
LOG(debug) << "incremented region counter, now: " << rc->fCount;
} else {
LOG(debug) << "no region counter found, creating one and initializing with 1";
rc = fManagementSegment.construct<RegionCounter>(unique_instance)(1);
LOG(debug) << "initialized region counter with: " << rc->fCount;
}
id = rc->fCount;
auto it = fRegions.find(id);
if (it != fRegions.end()) {
LOG(error) << "Trying to create a region that already exists";
return {nullptr, id};
}
// create region info
fShmRegions->emplace(id, RegionInfo(path.c_str(), flags, userFlags, fShmVoidAlloc));
auto r = fRegions.emplace(id, std::make_unique<Region>(fShmId, id, size, false, callback, bulkCallback, path, flags));
// LOG(debug) << "Created region with id '" << id << "', path: '" << path << "', flags: '" << flags << "'";
r.first->second->StartReceivingAcks();
result.first = &(r.first->second->fRegion);
result.second = id;
(fEventCounter->fCount)++;
}
fRegionEventsCV.notify_all();
return result;
} catch (interprocess_exception& e) {
LOG(error) << "cannot create region. Already created/not cleaned up?";
LOG(error) << e.what();
throw;
}
}
Region* GetRegion(const uint16_t id)
{
boost::interprocess::scoped_lock<boost::interprocess::named_mutex> lock(fShmMtx);
return GetRegionUnsafe(id);
}
Region* GetRegionUnsafe(const uint16_t id)
{
// remote region could actually be a local one if a message originates from this device (has been sent out and returned)
auto it = fRegions.find(id);
if (it != fRegions.end()) {
return it->second.get();
} else {
try {
// get region info
RegionInfo regionInfo = fShmRegions->at(id);
std::string path = regionInfo.fPath.c_str();
int flags = regionInfo.fFlags;
// LOG(debug) << "Located remote region with id '" << id << "', path: '" << path << "', flags: '" << flags << "'";
auto r = fRegions.emplace(id, std::make_unique<Region>(fShmId, id, 0, true, nullptr, nullptr, path, flags));
return r.first->second.get();
} catch (std::out_of_range& oor) {
LOG(error) << "Could not get remote region with id '" << id << "'. Does the region creator run with the same session id?";
LOG(error) << oor.what();
return nullptr;
} catch (boost::interprocess::interprocess_exception& e) {
LOG(warn) << "Could not get remote region for id '" << id << "'";
return nullptr;
}
}
}
void RemoveRegion(const uint16_t id)
{
fRegions.erase(id);
{
boost::interprocess::scoped_lock<boost::interprocess::named_mutex> lock(fShmMtx);
fShmRegions->at(id).fDestroyed = true;
(fEventCounter->fCount)++;
}
fRegionEventsCV.notify_all();
}
std::vector<fair::mq::RegionInfo> GetRegionInfo()
{
boost::interprocess::scoped_lock<boost::interprocess::named_mutex> lock(fShmMtx);
return GetRegionInfoUnsafe();
}
std::vector<fair::mq::RegionInfo> GetRegionInfoUnsafe()
{
std::vector<fair::mq::RegionInfo> result;
for (const auto& e : *fShmRegions) {
fair::mq::RegionInfo info;
info.managed = false;
info.id = e.first;
info.flags = e.second.fUserFlags;
info.event = e.second.fDestroyed ? RegionEvent::destroyed : RegionEvent::created;
if (!e.second.fDestroyed) {
auto region = GetRegionUnsafe(info.id);
info.ptr = region->fRegion.get_address();
info.size = region->fRegion.get_size();
} else {
info.ptr = nullptr;
info.size = 0;
}
result.push_back(info);
}
for (const auto& e : *fShmSegments) {
// make sure any segments in the session are found
GetSegment(e.first);
try {
fair::mq::RegionInfo info;
info.managed = true;
info.id = e.first;
info.event = RegionEvent::created;
info.ptr = boost::apply_visitor(SegmentAddress{}, fSegments.at(e.first));
info.size = boost::apply_visitor(SegmentSize{}, fSegments.at(e.first));
result.push_back(info);
} catch (const std::out_of_range& oor) {
LOG(error) << "could not find segment with id " << e.first;
LOG(error) << oor.what();
}
}
return result;
}
void SubscribeToRegionEvents(RegionEventCallback callback)
{
if (fRegionEventThread.joinable()) {
LOG(debug) << "Already subscribed. Overwriting previous subscription.";
boost::interprocess::scoped_lock<boost::interprocess::named_mutex> lock(fShmMtx);
fRegionEventsSubscriptionActive = false;
lock.unlock();
fRegionEventsCV.notify_all();
fRegionEventThread.join();
}
boost::interprocess::scoped_lock<boost::interprocess::named_mutex> lock(fShmMtx);
fRegionEventCallback = callback;
fRegionEventsSubscriptionActive = true;
fRegionEventThread = std::thread(&Manager::RegionEventsSubscription, this);
}
bool SubscribedToRegionEvents() { return fRegionEventThread.joinable(); }
void UnsubscribeFromRegionEvents()
{
if (fRegionEventThread.joinable()) {
boost::interprocess::scoped_lock<boost::interprocess::named_mutex> lock(fShmMtx);
fRegionEventsSubscriptionActive = false;
lock.unlock();
fRegionEventsCV.notify_all();
fRegionEventThread.join();
lock.lock();
fRegionEventCallback = nullptr;
}
}
void RegionEventsSubscription()
{
boost::interprocess::scoped_lock<boost::interprocess::named_mutex> lock(fShmMtx);
while (fRegionEventsSubscriptionActive) {
auto infos = GetRegionInfoUnsafe();
for (const auto& i : infos) {
auto el = fObservedRegionEvents.find({i.id, i.managed});
if (el == fObservedRegionEvents.end()) {
fRegionEventCallback(i);
fObservedRegionEvents.emplace(std::make_pair(i.id, i.managed), i.event);
++fNumObservedEvents;
} else {
if (el->second == RegionEvent::created && i.event == RegionEvent::destroyed) {
fRegionEventCallback(i);
el->second = i.event;
++fNumObservedEvents;
} else {
// LOG(debug) << "ignoring event for id" << i.id << ":";
// LOG(debug) << "incoming event: " << i.event;
// LOG(debug) << "stored event: " << el->second;
}
}
}
fRegionEventsCV.wait(lock, [&] { return !fRegionEventsSubscriptionActive || fNumObservedEvents != fEventCounter->fCount; });
}
}
void IncrementMsgCounter() { fMsgCounter.fetch_add(1, std::memory_order_relaxed); }
void DecrementMsgCounter() { fMsgCounter.fetch_sub(1, std::memory_order_relaxed); }
#ifdef FAIRMQ_DEBUG_MODE
void IncrementShmMsgCounter(uint16_t segmentId) { ++((*fShmMsgCounters)[segmentId].fCount); }
void DecrementShmMsgCounter(uint16_t segmentId) { --((*fShmMsgCounters)[segmentId].fCount); }
#endif
boost::interprocess::named_mutex& GetMtx() { return fShmMtx; }
void SendHeartbeats()
{
std::string controlQueueName("fmq_" + fShmId + "_cq");
std::unique_lock<std::mutex> lock(fHeartbeatsMtx);
while (fSendHeartbeats) {
try {
boost::interprocess::message_queue mq(boost::interprocess::open_only, controlQueueName.c_str());
boost::posix_time::ptime sndTill = boost::posix_time::microsec_clock::universal_time() + boost::posix_time::milliseconds(100);
if (mq.timed_send(fDeviceId.c_str(), fDeviceId.size(), 0, sndTill)) {
fHeartbeatsCV.wait_for(lock, std::chrono::milliseconds(100), [&]() { return !fSendHeartbeats; });
} else {
LOG(debug) << "control queue timeout";
}
} catch (boost::interprocess::interprocess_exception& ie) {
fHeartbeatsCV.wait_for(lock, std::chrono::milliseconds(500), [&]() { return !fSendHeartbeats; });
// LOG(debug) << "no " << controlQueueName << " found";
}
}
}
bool ThrowingOnBadAlloc() const { return fThrowOnBadAlloc; }
void GetSegment(uint16_t id)
{
auto it = fSegments.find(id);
if (it == fSegments.end()) {
try {
// get region info
SegmentInfo segmentInfo = fShmSegments->at(id);
LOG(debug) << "Located segment with id '" << id << "'";
using namespace boost::interprocess;
if (segmentInfo.fAllocationAlgorithm == AllocationAlgorithm::rbtree_best_fit) {
fSegments.emplace(id, RBTreeBestFitSegment(open_only, std::string("fmq_" + fShmId + "_m_" + std::to_string(id)).c_str()));
} else {
fSegments.emplace(id, SimpleSeqFitSegment(open_only, std::string("fmq_" + fShmId + "_m_" + std::to_string(id)).c_str()));
}
} catch (std::out_of_range& oor) {
LOG(error) << "Could not get segment with id '" << id << "': " << oor.what();
} catch (boost::interprocess::interprocess_exception& bie) {
LOG(error) << "Could not get segment with id '" << id << "': " << bie.what();
}
}
}
boost::interprocess::managed_shared_memory::handle_t GetHandleFromAddress(const void* ptr, uint16_t segmentId) const
{
return boost::apply_visitor(SegmentHandleFromAddress{ptr}, fSegments.at(segmentId));
}
void* GetAddressFromHandle(const boost::interprocess::managed_shared_memory::handle_t handle, uint16_t segmentId) const
{
return boost::apply_visitor(SegmentAddressFromHandle{handle}, fSegments.at(segmentId));
}
char* Allocate(const size_t size, size_t alignment = 0)
{
char* ptr = nullptr;
// tools::RateLimiter rateLimiter(20);
while (ptr == nullptr) {
try {
// boost::interprocess::managed_shared_memory::size_type actualSize = size;
// char* hint = 0; // unused for boost::interprocess::allocate_new
// ptr = fSegments.at(fSegmentId).allocation_command<char>(boost::interprocess::allocate_new, size, actualSize, hint);
size_t segmentSize = boost::apply_visitor(SegmentSize{}, fSegments.at(fSegmentId));
if (size > segmentSize) {
throw MessageBadAlloc(tools::ToString("Requested message size (", size, ") exceeds segment size (", segmentSize, ")"));
}
if (alignment == 0) {
ptr = reinterpret_cast<char*>(boost::apply_visitor(SegmentAllocate{size}, fSegments.at(fSegmentId)));
} else {
ptr = reinterpret_cast<char*>(boost::apply_visitor(SegmentAllocateAligned{size, alignment}, fSegments.at(fSegmentId)));
}
} catch (boost::interprocess::bad_alloc& ba) {
// LOG(warn) << "Shared memory full...";
if (ThrowingOnBadAlloc()) {
throw MessageBadAlloc(tools::ToString("shmem: could not create a message of size ", size, ", alignment: ", (alignment != 0) ? std::to_string(alignment) : "default", ", free memory: ", boost::apply_visitor(SegmentFreeMemory{}, fSegments.at(fSegmentId))));
}
// rateLimiter.maybe_sleep();
std::this_thread::sleep_for(std::chrono::milliseconds(50));
if (Interrupted()) {
return ptr;
} else {
continue;
}
}
#ifdef FAIRMQ_DEBUG_MODE
boost::interprocess::scoped_lock<boost::interprocess::named_mutex> lock(fShmMtx);
IncrementShmMsgCounter(fSegmentId);
if (fMsgDebug->count(fSegmentId) == 0) {
(*fMsgDebug).emplace(fSegmentId, fShmVoidAlloc);
}
(*fMsgDebug).at(fSegmentId).emplace(
static_cast<size_t>(GetHandleFromAddress(ptr, fSegmentId)),
MsgDebug(getpid(), size, std::chrono::system_clock::now().time_since_epoch().count())
);
#endif
}
return ptr;
}
void Deallocate(boost::interprocess::managed_shared_memory::handle_t handle, uint16_t segmentId)
{
boost::apply_visitor(SegmentDeallocate{GetAddressFromHandle(handle, segmentId)}, fSegments.at(segmentId));
#ifdef FAIRMQ_DEBUG_MODE
boost::interprocess::scoped_lock<boost::interprocess::named_mutex> lock(fShmMtx);
DecrementShmMsgCounter(segmentId);
try {
(*fMsgDebug).at(segmentId).erase(handle);
} catch(const std::out_of_range& oor) {
LOG(debug) << "could not locate debug container for " << segmentId << ": " << oor.what();
}
#endif
}
char* ShrinkInPlace(size_t newSize, char* localPtr, uint16_t segmentId)
{
return boost::apply_visitor(SegmentBufferShrink{newSize, localPtr}, fSegments.at(segmentId));
}
uint16_t GetSegmentId() const { return fSegmentId; }
~Manager()
{
using namespace boost::interprocess;
bool lastRemoved = false;
UnsubscribeFromRegionEvents();
{
std::unique_lock<std::mutex> lock(fHeartbeatsMtx);
fSendHeartbeats = false;
}
fHeartbeatsCV.notify_one();
if (fHeartbeatThread.joinable()) {
fHeartbeatThread.join();
}
try {
boost::interprocess::scoped_lock<named_mutex> lock(fShmMtx);
(fDeviceCounter->fCount)--;
if (fDeviceCounter->fCount == 0) {
LOG(debug) << "Last segment user, " << (fNoCleanup ? "skipping removal (--shm-no-cleanup is true)." : "removing segment.");
lastRemoved = true;
} else {
LOG(debug) << "Other segment users present (" << fDeviceCounter->fCount << "), skipping removal.";
}
} catch (interprocess_exception& e) {
LOG(error) << "Manager could not acquire lock: " << e.what();
}
if (lastRemoved && !fNoCleanup) {
Monitor::Cleanup(ShmId{fShmId});
}
}
private:
std::string fShmId;
uint16_t fSegmentId;
std::string fDeviceId;
std::unordered_map<uint16_t, boost::variant<RBTreeBestFitSegment, SimpleSeqFitSegment>> fSegments;
boost::interprocess::managed_shared_memory fManagementSegment;
VoidAlloc fShmVoidAlloc;
boost::interprocess::named_mutex fShmMtx;
boost::interprocess::named_condition fRegionEventsCV;
std::thread fRegionEventThread;
bool fRegionEventsSubscriptionActive;
std::function<void(fair::mq::RegionInfo)> fRegionEventCallback;
std::map<std::pair<uint16_t, bool>, RegionEvent> fObservedRegionEvents;
uint64_t fNumObservedEvents;
DeviceCounter* fDeviceCounter;
EventCounter* fEventCounter;
Uint16SegmentInfoHashMap* fShmSegments;
Uint16RegionInfoHashMap* fShmRegions;
std::unordered_map<uint16_t, std::unique_ptr<Region>> fRegions;
std::atomic<bool> fInterrupted;
std::atomic<int32_t> fMsgCounter; // TODO: find a better lifetime solution instead of the counter
#ifdef FAIRMQ_DEBUG_MODE
Uint16MsgDebugMapHashMap* fMsgDebug;
Uint16MsgCounterHashMap* fShmMsgCounters;
#endif
std::thread fHeartbeatThread;
bool fSendHeartbeats;
std::mutex fHeartbeatsMtx;
std::condition_variable fHeartbeatsCV;
bool fThrowOnBadAlloc;
bool fNoCleanup;
};
} // namespace fair::mq::shmem
#endif /* FAIR_MQ_SHMEM_MANAGER_H_ */
fair::mq::shmem::DeviceCounter
Definition: Common.h:105
fair::mq::shmem::EventCounter
Definition: Common.h:114
FairMQRegionInfo
Definition: FairMQUnmanagedRegion.h:29
fair::mq::shmem::SegmentMemoryZeroer
Definition: Common.h:238
fair::mq::shmem::SegmentFreeMemory
Definition: Common.h:244
fair::mq::shmem::Manager
Definition: Manager.h:61
fair::mq::shmem::SegmentSize
Definition: Common.h:226
fair::mq::shmem::SegmentAddress
Definition: Common.h:232
fair::mq::shmem::Monitor::Cleanup
static std::vector< std::pair< std::string, bool > > Cleanup(const ShmId &shmId, bool verbose=true)
Cleanup all shared memory artifacts created by devices.
Definition: Monitor.cxx:466
fair::mq::shmem
Definition: Common.h:33

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