From: Joel Rosdahl <joel@rosdahl.net>
Date: Thu, 10 Nov 2022 09:54:09 +0000 (+0100)
Subject: enhance: Make subsequent calls to ThreadPool::shut_down NOPs
X-Git-Tag: v4.7.4~15
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a33936b5e0bb61dedf9244056be167eb90678dd9;p=thirdparty%2Fccache.git

enhance: Make subsequent calls to ThreadPool::shut_down NOPs
---

diff --git a/src/ThreadPool.cpp b/src/ThreadPool.cpp
index a1d931a33..d5da4d507 100644
--- a/src/ThreadPool.cpp
+++ b/src/ThreadPool.cpp
@@ -51,6 +51,10 @@ ThreadPool::shut_down()
 {
   {
     std::unique_lock<std::mutex> lock(m_mutex);
+    if (m_shutting_down) {
+      // Already called shut_down.
+      return;
+    }
     m_shutting_down = true;
   }
   m_task_enqueued_or_shutting_down_condition.notify_all();