Protect CheckManager with mutex

Needed in case Clazy is used as a plugin inside libclang. There, we
might have multiple threads accessing CheckManager concurrently.

1 files changed, 8 insertions, 0 deletions

diff --git a/src/checkmanager.h b/src/checkmanager.h
index 63e00a7a..efedd26d 100644
--- a/src/checkmanager.h
+++ b/src/checkmanager.h
@@ -77,8 +77,15 @@ inline bool checkLessThanByLevel(const RegisteredCheck &c1, const RegisteredChec
 class CLAZYLIB_EXPORT CheckManager
 {
 public:
+    /**
+     * @note You must hold the CheckManager lock when operating on the instance
+     *
+     * @sa lock()
+     */
     static CheckManager *instance();
 
+    static std::mutex &lock() { return m_lock; }
+
     int registerCheck(const std::string &name, const std::string &className,
                       CheckLevel level, const FactoryFunction &, RegisteredCheck::Options = RegisteredCheck::Option_None);
     int registerFixIt(int id, const std::string &fititName, const std::string &checkName);
@@ -105,6 +112,7 @@ public:
 
 private:
     CheckManager();
+    static std::mutex m_lock;
 
     bool checkExists(const std::string &name) const;
     RegisteredCheck::List checksForLevel(int level) const;