Team2890/allwpilib
4
0
Fork 0
mirror of https://github.com/wpilibsuite/allwpilib synced 2026-06-19 00:41:43 +00:00
Code Issues Packages Projects Releases Wiki Activity

SendableRegistry.foreachLiveWindow: Prevent concurrent modification (#2129)

Browse Source 
Copy the internal map values into an array before iterating.

In C++, change to recursive mutex as well.
This commit is contained in:
Peter Johnson
2019-11-25 21:47:06 -08:00
committed by GitHub
parent 6dcd2b0e2c
commit 70102a60b7
2 changed files with 14 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
wpilibc/src/main/native/cpp/smartdashboard/SendableRegistry.cpp
View File

@@ -42,7 +42,7 @@ struct SendableRegistry::Impl {
}
};
wpi::mutex mutex;
wpi::recursive_mutex mutex;
wpi::UidVector<std::unique_ptr<Component>, 32> components;
wpi::DenseMap<void*, UID> componentMap;
@@ -310,7 +310,9 @@ void SendableRegistry::ForeachLiveWindow(
wpi::function_ref<void(CallbackData& data)> callback) const {
assert(dataHandle >= 0);
std::scoped_lock lock(m_impl->mutex);
for (auto&& comp : m_impl->components) {
wpi::SmallVector<Impl::Component*, 128> components;
for (auto&& comp : m_impl->components) components.emplace_back(comp.get());
for (auto comp : components) {
if (comp->sendable && comp->liveWindow) {
if (static_cast<size_t>(dataHandle) >= comp->data.size())
comp->data.resize(dataHandle + 1);