From e247f3813aebbb1a42e197d4b68cd0e265492060 Mon Sep 17 00:00:00 2001
From: Povilas Kanapickas <povilas@radix.lt>
Date: Tue, 10 Jun 2025 18:32:48 -0400
Subject: [PATCH] refactor: use std::mutex in EventQueue port
 https://github.com/debauchee/barrier/pull/410/commits/9df4741748fcd4ff3044a2f557fc0bbf2e36ea1e

---
 src/lib/base/EventQueue.cpp | 22 ++++++++++------------
 src/lib/base/EventQueue.h   |  5 ++---
 2 files changed, 12 insertions(+), 15 deletions(-)

diff --git a/src/lib/base/EventQueue.cpp b/src/lib/base/EventQueue.cpp
index 4060c7a17..04352f445 100644
--- a/src/lib/base/EventQueue.cpp
+++ b/src/lib/base/EventQueue.cpp
@@ -29,7 +29,6 @@ static void interrupt(Arch::ESignal, void *data)
 
 EventQueue::EventQueue() : m_readyMutex(new Mutex), m_readyCondVar(new CondVar<bool>(m_readyMutex, false))
 {
-  m_mutex = ARCH->newMutex();
   ARCH->setSignalHandler(Arch::kINTERRUPT, &interrupt, this);
   ARCH->setSignalHandler(Arch::kTERMINATE, &interrupt, this);
   m_buffer = std::make_unique<SimpleEventQueueBuffer>();
@@ -42,7 +41,6 @@ EventQueue::~EventQueue()
 
   ARCH->setSignalHandler(Arch::kINTERRUPT, nullptr, nullptr);
   ARCH->setSignalHandler(Arch::kTERMINATE, nullptr, nullptr);
-  ARCH->closeMutex(m_mutex);
 }
 
 void EventQueue::loop()
@@ -72,7 +70,7 @@ void EventQueue::loop()
 
 void EventQueue::adoptBuffer(IEventQueueBuffer *buffer)
 {
-  ArchMutexLock lock(m_mutex);
+  std::lock_guard<std::mutex> lock(m_mutex);
 
   LOG((CLOG_DEBUG "adopting new buffer"));
 
@@ -141,7 +139,7 @@ bool EventQueue::processEvent(Event &event, double timeout, Stopwatch &timer)
     return true;
 
   case IEventQueueBuffer::kUser: {
-    ArchMutexLock lock(m_mutex);
+    std::lock_guard<std::mutex> lock(m_mutex);
     event = removeEvent(dataID);
     return true;
   }
@@ -197,7 +195,7 @@ void EventQueue::addEvent(const Event &event)
 
 void EventQueue::addEventToBuffer(const Event &event)
 {
-  ArchMutexLock lock(m_mutex);
+  std::lock_guard<std::mutex> lock(m_mutex);
 
   // store the event's data locally
   auto eventID = saveEvent(event);
@@ -218,7 +216,7 @@ EventQueueTimer *EventQueue::newTimer(double duration, void *target)
   if (target == nullptr) {
     target = timer;
   }
-  ArchMutexLock lock(m_mutex);
+  std::lock_guard<std::mutex> lock(m_mutex);
   m_timers.insert(timer);
   // initial duration is requested duration plus whatever's on
   // the clock currently because the latter will be subtracted
@@ -235,7 +233,7 @@ EventQueueTimer *EventQueue::newOneShotTimer(double duration, void *target)
   if (target == nullptr) {
     target = timer;
   }
-  ArchMutexLock lock(m_mutex);
+  std::lock_guard<std::mutex> lock(m_mutex);
   m_timers.insert(timer);
   // initial duration is requested duration plus whatever's on
   // the clock currently because the latter will be subtracted
@@ -246,7 +244,7 @@ EventQueueTimer *EventQueue::newOneShotTimer(double duration, void *target)
 
 void EventQueue::deleteTimer(EventQueueTimer *timer)
 {
-  ArchMutexLock lock(m_mutex);
+  std::lock_guard<std::mutex> lock(m_mutex);
   for (auto index = m_timerQueue.begin(); index != m_timerQueue.end(); ++index) {
     if (index->getTimer() == timer) {
       m_timerQueue.erase(index);
@@ -261,7 +259,7 @@ void EventQueue::deleteTimer(EventQueueTimer *timer)
 
 void EventQueue::adoptHandler(EventTypes type, void *target, IEventJob *handler)
 {
-  ArchMutexLock lock(m_mutex);
+  std::lock_guard<std::mutex> lock(m_mutex);
   m_handlers[target][type].reset(handler);
 }
 
@@ -269,7 +267,7 @@ void EventQueue::removeHandler(EventTypes type, void *target)
 {
   std::unique_ptr<IEventJob> handler;
   {
-    ArchMutexLock lock(m_mutex);
+    std::lock_guard<std::mutex> lock(m_mutex);
     HandlerTable::iterator index = m_handlers.find(target);
     if (index != m_handlers.end()) {
       TypeHandlerTable &typeHandlers = index->second;
@@ -287,7 +285,7 @@ void EventQueue::removeHandlers(void *target)
 {
   std::vector<std::unique_ptr<IEventJob>> handlers;
   {
-    ArchMutexLock lock(m_mutex);
+    std::lock_guard<std::mutex> lock(m_mutex);
     HandlerTable::iterator index = m_handlers.find(target);
     if (index != m_handlers.end()) {
       // copy to handlers array and clear table for target
@@ -308,7 +306,7 @@ bool EventQueue::isEmpty() const
 
 IEventJob *EventQueue::getHandler(EventTypes type, void *target) const
 {
-  ArchMutexLock lock(m_mutex);
+  std::lock_guard<std::mutex> lock(m_mutex);
   if (HandlerTable::const_iterator index = m_handlers.find(target); index != m_handlers.end()) {
     const TypeHandlerTable &typeHandlers = index->second;
     TypeHandlerTable::const_iterator index2 = typeHandlers.find(type);
diff --git a/src/lib/base/EventQueue.h b/src/lib/base/EventQueue.h
index d417c9a94..4a91bb83b 100644
--- a/src/lib/base/EventQueue.h
+++ b/src/lib/base/EventQueue.h
@@ -15,11 +15,10 @@
 
 #include <map>
 #include <memory>
+#include <mutex>
 #include <queue>
 #include <set>
 
-class Mutex;
-
 //! Event queue
 /*!
 An event queue that implements the platform independent parts and
@@ -104,7 +103,7 @@ private:
   using HandlerTable = std::map<void *, TypeHandlerTable>;
 
   int m_systemTarget = 0;
-  ArchMutex m_mutex;
+  mutable std::mutex m_mutex;
 
   // buffer of events
   std::unique_ptr<IEventQueueBuffer> m_buffer;