Add Data:performAtomic to lock a mutex while using a Data object.

src/common/Data.cpp

@@ -20,10 +20,27 @@
 
 // LOVE
 #include "Data.h"
+#include "thread/threads.h"
 
 namespace love
 {
 
 love::Type Data::type("Data", &Object::type);
 
+Data::~Data()
+{
+	delete mutex;
+}
+
+static void createMutex(love::thread::Mutex **mutexAddress)
+{
+	*mutexAddress = love::thread::newMutex();
+}
+
+love::thread::Mutex *Data::getMutex()
+{
+	std::call_once(mutexCreated, createMutex, &mutex);
+	return mutex;
+}
+
 } // love

src/common/Data.h

@@ -22,15 +22,20 @@
 #define LOVE_DATA_H
 
 // LOVE
-#include "config.h"
 #include "Object.h"
 
 // C
 #include <stddef.h>
+#include <mutex>
 
 namespace love
 {
 
+namespace thread
+{
+class Mutex;
+}
+
 /**
  * This class is a simple abstraction over all objects which contain data.
  **/
@@ -40,10 +45,8 @@ public:
 
 	static love::Type type;
 
-	/**
-	 * Destructor.
-	 **/
-	virtual ~Data() {}
+	Data() {};
+	virtual ~Data();
 
 	/**
 	 * Creates a duplicate of Data derived class instance.
@@ -60,6 +63,17 @@ public:
 	 **/
 	virtual size_t getSize() const = 0;
 
+	/**
+	 * Gets the Mutex associated with this Data object. Creates it in a thread-
+	 * safe manner if necessary.
+	 **/
+	love::thread::Mutex *getMutex();
+
+private:
+
+	love::thread::Mutex *mutex = nullptr;
+	std::once_flag mutexCreated;
+
 }; // Data
 
 } // love