From f3e37cc713368b2b30bd7d9fdacaac6b188c017a Mon Sep 17 00:00:00 2001
From: Jean Pierre Cimalando <jp-dev@inbox.ru>
Date: Thu, 6 Aug 2020 16:46:56 +0200
Subject: [PATCH] Use the spinlock mutex in EQPool

---
 src/sfizz/EQPool.cpp | 4 ++--
 src/sfizz/EQPool.h   | 3 ++-
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/sfizz/EQPool.cpp b/src/sfizz/EQPool.cpp
index 6d3d75b2..cc608a12 100644
--- a/src/sfizz/EQPool.cpp
+++ b/src/sfizz/EQPool.cpp
@@ -108,7 +108,7 @@ sfz::EQPool::EQPool(const MidiState& state, int numEQs)
 
 sfz::EQHolderPtr sfz::EQPool::getEQ(const EQDescription& description, unsigned numChannels, float velocity)
 {
-    const std::unique_lock<std::mutex> lock { eqGuard, std::try_to_lock };
+    const std::unique_lock<SpinMutex> lock { eqGuard, std::try_to_lock };
     if (!lock.owns_lock())
         return {};
 
@@ -132,7 +132,7 @@ size_t sfz::EQPool::getActiveEQs() const
 
 size_t sfz::EQPool::setnumEQs(size_t numEQs)
 {
-    const std::lock_guard<std::mutex> eqLock { eqGuard };
+    const std::lock_guard<SpinMutex> eqLock { eqGuard };
 
     swapAndPopAll(eqs, [](sfz::EQHolderPtr& eq) { return eq.use_count() == 1; });
 
diff --git a/src/sfizz/EQPool.h b/src/sfizz/EQPool.h
index 7c70af22..d1f7cebb 100644
--- a/src/sfizz/EQPool.h
+++ b/src/sfizz/EQPool.h
@@ -2,6 +2,7 @@
 #include "SfzFilter.h"
 #include "EQDescription.h"
 #include "MidiState.h"
+#include "utility/SpinMutex.h"
 #include <vector>
 #include <memory>
 #include <mutex>
@@ -115,7 +116,7 @@ public:
      */
     void setSampleRate(float sampleRate);
 private:
-    std::mutex eqGuard;
+    SpinMutex eqGuard;
     float sampleRate { config::defaultSampleRate };
     const MidiState& midiState;
     std::vector<EQHolderPtr> eqs;