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shm: error on duplicate region IDs

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This commit is contained in:
Alexey Rybalchenko
2022-10-04 12:15:21 +02:00
parent 58aa2b4f88
commit 42ce691f57
2 changed files with 33 additions and 6 deletions
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20
fairmq/shmem/Manager.h
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@@ -396,7 +396,23 @@ class Manager
const uint16_t id = cfg.id.value();
std::lock_guard<std::mutex> lock(fLocalRegionsMtx);
auto& region = fRegions[id] = std::make_unique<UnmanagedRegion>(fShmId, size, true, cfg);
UnmanagedRegion* region = nullptr;
auto it = fRegions.find(id);
if (it != fRegions.end()) {
region = it->second.get();
if (region->fControlling) {
LOG(error) << "Unmanaged Region with id " << id << " already exists. Only unique IDs per session are allowed.";
throw TransportError(tools::ToString("Unmanaged Region with id ", id, " already exists. Only unique IDs per session are allowed."));
}
LOG(debug) << "Unmanaged region (view) already present, promoting to controller";
region->BecomeController(cfg);
} else {
auto res = fRegions.emplace(id, std::make_unique<UnmanagedRegion>(fShmId, size, true, cfg));
region = res.first->second.get();
}
// LOG(debug) << "Created region with id '" << id << "', path: '" << cfg.path << "', flags: '" << cfg.creationFlags << "'";
// start ack receiver only if a callback has been provided.
@@ -406,7 +422,7 @@ class Manager
region->StartAckSender();
region->StartAckReceiver();
}
result.first = region.get();
result.first = region;
result.second = id;
}
fRegionsGen += 1; // signal TL cache invalidation