From b6ba83466911bc6bf917aec6f8ae1bec15f09c28 Mon Sep 17 00:00:00 2001
From: KIRA Ryouta <KKQ-KKQ@users.noreply.github.com>
Date: Fri, 16 Feb 2024 11:36:06 +0900
Subject: [PATCH] Improved check in garbage collection

---
 src/sfizz/FilePool.cpp | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/src/sfizz/FilePool.cpp b/src/sfizz/FilePool.cpp
index 37dc2ff2..86310940 100644
--- a/src/sfizz/FilePool.cpp
+++ b/src/sfizz/FilePool.cpp
@@ -694,10 +694,14 @@ void sfz::FilePool::triggerGarbageCollection() noexcept
 
         // do garbage collection when changing the status is success
         if (data.status.compare_exchange_strong(status, FileData::Status::GarbageCollecting)) {
-            data.availableFrames = 0;
-            garbageToCollect.push_back(std::move(data.fileData));
-            data.status = FileData::Status::Preloaded;
-            return true;
+            // recheck readerCount
+            auto readerCount = data.readerCount.load();
+            if (readerCount == 0) {
+                data.availableFrames = 0;
+                garbageToCollect.push_back(std::move(data.fileData));
+                return true;
+            }
+            data.status = status;
         }
         return false;
     });